Jiří Pechoušek

2011

• J. Pechousek, R. Prochazka, V. Prochazka, and J. Frydrych, “Virtual instrumentation technique used in the nuclear digital signal
  processing system design: Energy and time measurement tests,” NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION
  A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, vol. 637, iss. 1, pp. 200-205, 2011.
  [Bibtex]

  @article ISI:000289608000026,
  Author = Pechousek, J. and Prochazka, R. and Prochazka, V. and Frydrych, J.,
  Title = Virtual instrumentation technique used in the nuclear digital signal
     processing system design: Energy and time measurement tests,
  Journal = NUCLEAR INSTRUMENTS \& METHODS IN PHYSICS RESEARCH SECTION
     A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,
  Year = 2011,
  Volume = 637,
  Number = 1,
  Pages = 200-205,
  Month = MAY 1,
  Abstract = In this report, computer-based digital signal processing system with a
     200 MS s(-1) sampling digitizer is presented. Virtual instrumentation
     technique is used to easily develop a system which provides spectroscopy
     measurements such as amplitude and time signal analysis, with the
     time-of-flight facility. Several test measurements were performed to
     determine the characteristics of a system. The presented system may find
     its application in the coincidence measurement since the system is
     usable for different types of detectors and sensitive to decay lifetimes
     from tens of nanoseconds to seconds. (C) 2011 Elsevier B.V. All rights
     reserved.,
  DOI = 10.1016/j.nima.2011.02.024,
  ISSN = 0168-9002,
  Unique-ID = ISI:000289608000026,
  

2010

• J. Frydrych, L. Machala, M. Hermanek, I. Medrik, M. Mashlan, J. Tucek, J. Pechousek, and V. K. Sharma, “A nanocrystalline hematite film prepared from iron(III) chloride
  precursor,” THIN SOLID FILMS, vol. 518, iss. 21, pp. 5916-5919, 2010.
  [Bibtex]

  @article ISI:000280989100008,
  Author = Frydrych, Jiri and Machala, Libor and Hermanek, Martin and Medrik, Ivo
     and Mashlan, Miroslav and Tucek, Jiri and Pechousek, Jiri and Sharma,
     Virender K.,
  Title = A nanocrystalline hematite film prepared from iron(III) chloride
     precursor,
  Journal = THIN SOLID FILMS,
  Year = 2010,
  Volume = 518,
  Number = 21,
  Pages = 5916-5919,
  Month = AUG 31,
  Abstract = This paper deals with a simple and low-cost method developed to deposit
     hematite (alpha-Fe(2)O(3)) layers on a fluorine-doped tin oxide (FTO/F
     center dot SnO(2)) substrate by thermal decomposition of solid iron(III)
     chloride hexahydrate (FeCl(3) 6H(2)O) Deposition procedure takes place
     through chemical intermediate iron(III) oxide chloride (FeOCl) film. A
     crucial influence of atmosphere dynamics involved in the calcination
     process of FeOCl has been observed As-deposited films were characterized
     by means of Conversion Electron Mossbauer Spectroscopy (CEMS), Grazing
     Angle X-Ray Diffractometry (GAXRD), Atomic Force Microscopy (AFM),
     Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray (EDX)
     analysis Final nanocrystalline hematite film with a cactus-field-like
     design consists of 20 nm thick porous crystal plates. A process of
     hematite doping by tin atoms from substrate coating is also discussed
     (C) 2010 Elsevier B V. All rights reserved.,
  DOI = 10.1016/j.tsf.2010.05.081,
  ISSN = 0040-6090,
  Unique-ID = ISI:000280989100008,
  

• C. Gregor, M. Hermanek, D. Jancik, J. Pechousek, J. Filip, J. Hrbac, and R. Zboril, “The Effect of Surface Area and Crystal Structure on the Catalytic
  Efficiency of Iron(III) Oxide Nanoparticles in Hydrogen Peroxide
  Decomposition,” EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, iss. 16, pp. 2343-2351, 2010.
  [Bibtex]

  @article ISI:000278888300003,
  Author = Gregor, Cenek and Hermanek, Martin and Jancik, Dalibor and Pechousek,
     Jiri and Filip, Jan and Hrbac, Jan and Zboril, Radek,
  Title = The Effect of Surface Area and Crystal Structure on the Catalytic
     Efficiency of Iron(III) Oxide Nanoparticles in Hydrogen Peroxide
     Decomposition,
  Journal = EUROPEAN JOURNAL OF INORGANIC CHEMISTRY,
  Year = 2010,
  Number = 16,
  Pages = 2343-2351,
  Month = JUN,
  Abstract = Iron(II) oxalate dihydrate has been used as a readily decomposable
     substance for the controlled synthesis of nanosized iron(III) oxides.
     The polymorphous composition, particle size and surface area of these
     iron oxide nanoparticles were controlled by varying the reaction
     temperature between 185 and 500 degrees C. As-prepared samples were
     characterized by XRD, low-temperature and in-field Mossbauer
     spectroscopy, BET surface area and the TEM technique. They were also
     tested as heterogeneous catalysts in hydrogen peroxide decomposition. At
     the selected temperatures, the formed nanomaterials did not contain any
     traces of amorphous phase, which is known to considerably reduce the
     catalytic efficiency of iron(III) oxide catalysts. As the thickness of
     the sample (approximate to 2 mm) was above the critical value, a
     temporary temperature increase (''exo effect'') was observed during
     all quasi-isothermal decompositions studied, irrespective of the
     reaction temperature. Increasing the reaction temperature resulted in a
     shift of the exo effect towards shorter times and an increased content
     of maghemite phase. The maghemite content decreases above 350 degrees C
     as a result of a thermally induced polymorphous transition into
     hematite. The catalytic data demonstrate that the crystal structure of
     iron(III) oxide (i.e. the relative contents of maghemite and hematite)
     does not influence the rate of hydrogen peroxide decomposition. However,
     the rate constant increases monotonously with increasing sample surface
     area (and decreasing thermolysis temperature), reaching a maximum of 27
     x 10(-3) min(-1)(g/L)(-1) for the sample with a surface area of 285
     m(2)g(-1). This rate constant is currently the highest reported value of
     all known iron oxide catalytic systems and is even slightly higher than
     that observed for the most efficient catalyst reported to date, which
     has a significantly larger surface area of 337 m(2)g(-1). This
     surprisingly high catalytic activity at relatively low surface area can
     be ascribed to the absence of a amorphous phase in the samples prepared
     in this study. Taking into account these new findings, the contributions
     of the key factors highlighted above (surface area, particle size,
     crystal structure, crystallinity) to the overall activity of iron oxides
     for hydrogen peroxide decomposition are discussed.,
  DOI = 10.1002/ejic.200901066,
  ISSN = 1434-1948,
  Unique-ID = ISI:000278888300003,
  

• R. Prochazka, P. Tucek, J. Tucek, J. Marek, M. Mashlan, and J. Pechousek, “Statistical analysis and digital processing of the Mossbauer spectra,” MEASUREMENT SCIENCE & TECHNOLOGY, vol. 21, iss. 2, 2010.
  [Bibtex]

  @article ISI:000273729300008,
  Author = Prochazka, Roman and Tucek, Pavel and Tucek, Jiri and Marek, Jaroslav
     and Mashlan, Miroslav and Pechousek, Jiri,
  Title = Statistical analysis and digital processing of the Mossbauer spectra,
  Journal = MEASUREMENT SCIENCE \& TECHNOLOGY,
  Year = 2010,
  Volume = 21,
  Number = 2,
  Month = FEB,
  Abstract = This work is focused on using the statistical methods and development of
     the filtration procedures for signal processing in Mossbauer
     spectroscopy. Statistical tools for noise filtering in the measured
     spectra are used in many scientific areas. The use of a pure statistical
     approach in accumulated Mossbauer spectra filtration is described. In
     Mossbauer spectroscopy, the noise can be considered as a Poisson
     statistical process with a Gaussian distribution for high numbers of
     observations. This noise is a superposition of the non-resonant photons
     counting with electronic noise ( from. gamma-ray detection and
     discrimination units), and the velocity system quality that can be
     characterized by the velocity nonlinearities. The possibility of a
     noise-reducing process using a new design of statistical filter
     procedure is described. This mathematical procedure improves the
     signal-to-noise ratio and thus makes it easier to determine the
     hyperfine parameters of the given Mossbauer spectra. The filter
     procedure is based on a periodogram method that makes it possible to
     assign the statistically important components in the spectral domain.
     The significance level for these components is then feedback-controlled
     using the correlation coefficient test results. The estimation of the
     theoretical correlation coefficient level which corresponds to the
     spectrum resolution is performed. Correlation coefficient test is based
     on comparison of the theoretical and the experimental correlation
     coefficients given by the Spearman method. The correctness of this
     solution was analyzed by a series of statistical tests and confirmed by
     many spectra measured with increasing statistical quality for a given
     sample ( absorber). The effect of this filter procedure depends on the
     signal-to-noise ratio and the applicability of this method has binding
     conditions.,
  DOI = 10.1088/0957-0233/21/2/025107,
  Article-Number = 025107,
  ISSN = 0957-0233,
  Unique-ID = ISI:000273729300008,
  

• J. Pechousek, R. Prochazka, D. Jancik, J. Frydrych, and M. Mashlan, “Universal LabVIEW-powered Mossbauer spectrometer based on USB, PCI or
  PXI devices,” in INTERNATIONAL CONFERENCE ON THE APPLICATIONS OF THE MOSSBAUER EFFECT
  (ICAME 2009), 2010.
  [Bibtex]

  @inproceedings ISI:000287181700006,
  Author = Pechousek, J. and Prochazka, R. and Jancik, D. and Frydrych, J. and
     Mashlan, M.,
  Editor = Muller, H and Reissner, M and Steiner, W and Wiesinger, G,
  Title = Universal LabVIEW-powered Mossbauer spectrometer based on USB, PCI or
     PXI devices,
  Booktitle = INTERNATIONAL CONFERENCE ON THE APPLICATIONS OF THE MOSSBAUER EFFECT
     (ICAME 2009),
  Series = Journal of Physics Conference Series,
  Year = 2010,
  Volume = 217,
  Note = International Conference on the Applications of the Mossbauer Effect,
     Vienna Univ Technol, Vienna, AUSTRIA, JUL 19-24, 2009,
  Abstract = A new design of the universal Mossbauer spectrometer is presented.
     Hardware solution is based on commercial-available data acquisition
     devices working on the USB, PCI or PXI platform controlled by the main
     application running on the personal computer. Final application allows,
     in addition to Mossbauer spectra accumulation, the detailed analysis of
     the acquired detector signal in energy and time domains, and also to
     tune the velocity driving system separately. The experimental results
     show a high flexibility in various detectors and velocity transducers
     usage. It is easy to change the way of operation according to the
     different experimental requirements. This concept can be used with all
     common spectrometric benches with different velocity transducers,
     radioactive sources and gamma-ray detectors. This is a new approach in
     the Mossbauer spectrometer construction.,
  DOI = 10.1088/1742-6596/217/1/012006,
  Article-Number = 012006,
  ISSN = 1742-6588,
  Unique-ID = ISI:000287181700006,
  

• M. Hermanek, P. Hermankova, and J. Pechousek, “Quasi-isothermal decomposition: a way to nanocrystalline mesoporous-like
  Fe(2)O(3) catalyst for rapid heterogeneous decomposition of hydrogen
  peroxide,” JOURNAL OF MATERIALS CHEMISTRY, vol. 20, iss. 18, pp. 3709-3715, 2010.
  [Bibtex]

  @article ISI:000277086200025,
  Author = Hermanek, Martin and Hermankova, Pavla and Pechousek, Jiri,
  Title = Quasi-isothermal decomposition: a way to nanocrystalline mesoporous-like
     Fe(2)O(3) catalyst for rapid heterogeneous decomposition of hydrogen
     peroxide,
  Journal = JOURNAL OF MATERIALS CHEMISTRY,
  Year = 2010,
  Volume = 20,
  Number = 18,
  Pages = 3709-3715,
  Abstract = Mesoporous-like heterogeneous catalyst, consisting of ultrasmall (<5 nm)
     amorphous Fe(2)O(3) and nanocrystalline gamma-Fe(2)O(3) possessing
     surface area of 440 m(2) g(-1) and reaching an enormous rate constant of
     70 x 10(-3) min(-1) in hydrogen peroxide decomposition at room
     temperature, pH of 6.3-6.5 and the catalyst concentration of 1 g L(-1)
     was easily prepared by a one-step quasi-isothermal decomposition ( an
     isothermal decomposition accompanied with a controlled time-limited
     exotherm) of iron(III) oxalate in air. The non-equilibrium temperature
     conditions proceeding at the very beginning of the oxalate decomposition
     proved to be the key factor responsible for the formation of highly
     efficient combination of nanocrystalline character, large surface area
     and mesoporous-like nature of the catalyst. The material and catalytic
     properties of the as-prepared catalyst are discussed and compared to
     those obtained for our iron(III) oxide-based catalyst (26 x 10 (3) min
     (1)) prepared earlier by a slow, purely isothermal decomposition of
     iron(II) oxalate.,
  DOI = 10.1039/c000632g,
  ISSN = 0959-9428,
  Unique-ID = ISI:000277086200025,
  

• J. Pechousek, R. Prochazka, J. Cuda, J. Frydrych, and D. Jancik, "Investigation of the Mossbauer Spectrum Quality as a Dependence on the
  Frequency of the Velocity Signal," in MOSSBAUER SPECTROSCOPY IN MATERIALS SCIENCE - 2010, 2010, pp. 134-142.
  [Bibtex]

  @inproceedings ISI:000281606200019,
  Author = Pechousek, J. and Prochazka, R. and Cuda, J. and Frydrych, J. and
     Jancik, D.,
  Editor = Tucek, J and Miglierini, M,
  Title = Investigation of the Mossbauer Spectrum Quality as a Dependence on the
     Frequency of the Velocity Signal,
  Booktitle = MOSSBAUER SPECTROSCOPY IN MATERIALS SCIENCE - 2010,
  Series = AIP Conference Proceedings,
  Year = 2010,
  Volume = 1258,
  Pages = 134-142,
  Note = International Conference on Mossbauer Spectroscopy in Materials Science,
     Liptovsky Jan, SLOVAKIA, JAN 31-FEB 05, 2010,
  Abstract = This paper is focused on a quality characterizing the Mossbauer spectra
     measured for various frequencies of the velocity signal. Standard
     electromechanical double-loudspeaker drive and digital PID velocity
     controller were used for calibration spectra measurement in the
     frequency interval from 4 up to 100 Hz. Several parameters were
     evaluated for recommendation of the suitable velocity signal frequency.,
  DOI = 10.1063/1.3473890,
  ISSN = 0094-243X,
  ISBN = 978-0-7354-0806-7,
  Unique-ID = ISI:000281606200019,
  

• R. Prochazka, J. Pechousek, and J. Frydrych, "Development of the Fast Scintillation Detector with Programmable High
  Voltage Adjustment Suitable for Mossbauer Spectroscopy," in MOSSBAUER SPECTROSCOPY IN MATERIALS SCIENCE - 2010, 2010, pp. 143-149.
  [Bibtex]

  @inproceedings ISI:000281606200020,
  Author = Prochazka, R. and Pechousek, J. and Frydrych, J.,
  Editor = Tucek, J and Miglierini, M,
  Title = Development of the Fast Scintillation Detector with Programmable High
     Voltage Adjustment Suitable for Mossbauer Spectroscopy,
  Booktitle = MOSSBAUER SPECTROSCOPY IN MATERIALS SCIENCE - 2010,
  Series = AIP Conference Proceedings,
  Year = 2010,
  Volume = 1258,
  Pages = 143-149,
  Note = International Conference on Mossbauer Spectroscopy in Materials Science,
     Liptovsky Jan, SLOVAKIA, JAN 31-FEB 05, 2010,
  Abstract = This work is focused on a development of a compact fast scintillation
     detector suitable for Mossbauer spectroscopy (low energy X-ray/y-ray
     detection) where high counting rates are inevitable. Optimization of
     this part was necessary for a reliable function, better time resolution
     and to avoid a detector pulses pile-up effect. The pile-up effect
     decreases the measurement performance, significantly depends on the
     source activity and also on the pulse duration. Our new detection unit
     includes a fast scintillation crystal YAP:Ce, an R6095 photomultiplier
     tube, a high voltage power supply socket C9028-01 assembly, an AD5252
     digital potentiometer with an 12C interface and an AD8000 ultra fast
     operation preamplifier. The main advantages of this solution lie in a
     short pulse duration (less than 200 ns), stable operation for high
     activities, programmable gain of the high voltage supply and compact
     design in the aluminum housing.,
  DOI = 10.1063/1.3473891,
  ISSN = 0094-243X,
  ISBN = 978-0-7354-0806-7,
  Unique-ID = ISI:000281606200020,
  

2009

• J. Pechousek, D. Jancik, V. Evdokimov, and R. Prochazka, "Velocity driving system for an in-field Mossbauer spectrometer," NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM
  INTERACTIONS WITH MATERIALS AND ATOMS, vol. 267, iss. 5, pp. 846-848, 2009.
  [Bibtex]

  @article ISI:000264984600021,
  Author = Pechousek, Jiri and Jancik, Dalibor and Evdokimov, Viktor and Prochazka,
     Roman,
  Title = Velocity driving system for an in-field Mossbauer spectrometer,
  Journal = NUCLEAR INSTRUMENTS \& METHODS IN PHYSICS RESEARCH SECTION B-BEAM
     INTERACTIONS WITH MATERIALS AND ATOMS,
  Year = 2009,
  Volume = 267,
  Number = 5,
  Pages = 846-848,
  Month = MAR,
  Abstract = The velocity driving system for an in-field Mossbauer spectrometer with
     a constant acceleration mode is described. The driving system uses a
     digital proportional-integral-derivative velocity controller based on
     the Field Programmable Gate Array in the National Instruments CompactRIO
     system. This novel approach is able to drive the transducer in wide
     range of measurement conditions and eliminates external magnetic field
     disturbances. The frequency characteristics of stray fields of 5 T and 8
     T were measured and analyzed. The nonlinearity of the velocity scales is
     better than 0.2\%. (C) 2009 Elsevier B.V. All rights reserved.,
  DOI = 10.1016/j.nimb.2009.01.033,
  ISSN = 0168-583X,
  Unique-ID = ISI:000264984600021,
  

• J. Pechousek, R. Prochazka, M. Mashlan, D. Jancik, and J. Frydrych, "Digital proportional-integral-derivative velocity controller of a
  Mossbauer spectrometer," MEASUREMENT SCIENCE & TECHNOLOGY, vol. 20, iss. 1, 2009.
  [Bibtex]

  @article ISI:000261627800038,
  Author = Pechousek, J. and Prochazka, R. and Mashlan, M. and Jancik, D. and
     Frydrych, J.,
  Title = Digital proportional-integral-derivative velocity controller of a
     Mossbauer spectrometer,
  Journal = MEASUREMENT SCIENCE \& TECHNOLOGY,
  Year = 2009,
  Volume = 20,
  Number = 1,
  Month = JAN,
  Abstract = The digital proportional-integral-derivative (PID) velocity controller
     used in the Mossbauer spectrometer implemented in field programmable
     gate array (FPGA) is based on the National Instruments CompactRIO
     embedded system and LabVIEW graphical programming tools. The system
     works as a remote system accessible via the Ethernet. The digital
     controller operates in real-time conditions, and the maximum sampling
     frequency is approximately 227 kS s(-1). The system was tested with
     standard sample measurements of alpha-Fe and alpha-(57)Fe(2)O(3) on two
     different electromechanical velocity transducers. The nonlinearities of
     the velocity scales in the relative form are better than 0.2\%. The
     replacement of the standard analog PID controller by the new system
     brings the possibility of optimizing the control process more precisely.,
  DOI = 10.1088/0957-0233/20/1/017001,
  Article-Number = 017001,
  ISSN = 0957-0233,
  Unique-ID = ISI:000261627800038,
  

2008

• J. Frydrych, M. Mashlan, J. Pechousek, and D. Jancik, "Conversion Electron Detectors for (57)Fe Mossbauer Measurements," in MOSSBAUER SPECTROSCOPY IN MATERIALS SCIENCE 2008, 2008, pp. 170-184.
  [Bibtex]

  @inproceedings ISI:000262290200021,
  Author = Frydrych, J. and Mashlan, M. and Pechousek, J. and Jancik, D.,
  Editor = Mashlan, M and Zboril, R,
  Title = Conversion Electron Detectors for (57)Fe Mossbauer Measurements,
  Booktitle = MOSSBAUER SPECTROSCOPY IN MATERIALS SCIENCE 2008,
  Series = AIP Conference Proceedings,
  Year = 2008,
  Volume = 1070,
  Pages = 170-184,
  Note = International Conference on Mossbauer Spectroscopy in Materials Science,
     Hlohovec u Breclavi, CZECH REPUBLIC, JUN 16-20, 2008,
  Abstract = This review article is intended to help all those, who now begin to work
     in the field of conversion electron Mossbauer spectroscopy (CEMS) and
     who have to select a right type of a detector. There exist a large
     number of specific engineering designs in each of the detector kind,
     which is impossible to cover in one paper. That is why we only try to
     outline basic classification and general survey of properties of
     individual CEMS detector kinds supplemented by references to its more
     detailed analysis. (57)Fe is the most frequently used isotope in CEMS
     and thereby the paper is devoted to this case.,
  ISSN = 0094-243X,
  ISBN = 978-0-7354-0601-8,
  Unique-ID = ISI:000262290200021,
  

2007

• M. Hermanek, R. Zboril, N. Medrik, J. Pechousek, and C. Gregor, "Catalytic efficiency of iron(III) oxides in decomposition of hydrogen
  peroxide: Competition between the surface area and crystallinity of
  nanoparticles," JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 129, iss. 35, pp. 10929-10936, 2007.
  [Bibtex]

  @article ISI:000249208300060,
  Author = Hermanek, Martin and Zboril, Radek and Medrik, No and Pechousek, Jiri
     and Gregor, Cenek,
  Title = Catalytic efficiency of iron(III) oxides in decomposition of hydrogen
     peroxide: Competition between the surface area and crystallinity of
     nanoparticles,
  Journal = JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,
  Year = 2007,
  Volume = 129,
  Number = 35,
  Pages = 10929-10936,
  Month = SEP 5,
  Abstract = Various iron(III) oxide catalysts were prepared by controlled
     decomposition of a narrow layer (ca. 1 mm) of iron(II) oxalate
     dihydrate, FeC2O4 center dot 2H(2)O, in air at the minimum conversion
     temperature of 175 degrees C. This thermally induced solid-state process
     allows for simple synthesis of amorphous Fe2O3 nanoparticles and their
     controlled one-step crystallization to hematite (alpha-Fe2O3). Thus,
     nanopowders differing in surface area and particle crystallinity can be
     produced depending on the reaction time. The phase composition of
     iron(III) oxides was monitored by XRD and Fe-57 Mossbauer spectroscopy
     including in-field measurements, providing information on the relative
     contents of amorphous and crystalline phases. The gradual changes in
     particle size and surface area accompanying crystallization were
     evaluated by HRTEM and BET analysis, respectively. The catalytic
     efficiency of the synthesized nanoparticles was tested by tracking the
     decomposition of hydrogen peroxide. The obtained kinetic data gave an
     unconventional nonmonotone dependence of the rate constant on the
     surface area of the samples. The amorphous nanopowder with the largest
     surface area of 401 m(2) g(-1) revealed the lowest catalytic efficiency,
     while the highest efficiency was achieved with the sample having a
     significantly lower surface area, 337 m(2) g(-1), exhibiting a
     prevailing content of crystalline alpha-Fe2O3 phase. The obtained rate
     constant, 26.4 x 10(-3) min(-1) (g/L)(-1), is currently the highest
     value published. The observed rare catalytic phenomenon, where the
     particle crystallinity prevails over the surface area effects, is
     discussed with respect to other processes of heterogeneous catalysis.,
  DOI = 10.1021/ja072918x,
  ISSN = 0002-7863,
  Unique-ID = ISI:000249208300060,
  

• J. Pechousek, M. Mashlan, J. Frydrych, D. Jancik, and R. Prochazka, "Improving detector signal processing with pulse height analysis in
  Mossbauer spectrometers," HYPERFINE INTERACTIONS, vol. 175, iss. 1-3, pp. 1-8, 2007.
  [Bibtex]

  @article ISI:000256911000001,
  Author = Pechousek, Jiri and Mashlan, Miroslav and Frydrych, Jiri and Jancik,
     Dalibor and Prochazka, Roman,
  Title = Improving detector signal processing with pulse height analysis in
     Mossbauer spectrometers,
  Journal = HYPERFINE INTERACTIONS,
  Year = 2007,
  Volume = 175,
  Number = 1-3,
  Pages = 1-8,
  Month = FEB,
  Abstract = A plenty of different programming techniques and instrument solutions
     are used in the development of Mossbauer spectrometers. Each of them
     should provide a faster spectrum accumulation process, increased
     productivity of measurements, decreased nonlinearity of the velocity
     scale, etc. The well known virtual instrumentation programming method
     has been used to design a computer-based Mossbauer spectrometer.
     Hardware solution was based on two commercially-available PCI modules
     produced by National Instruments Co. Virtual Mossbauer spectrometer is
     implemented by the graphical programming language LabVIEW 7 Express.
     This design environment allows to emulate the multichannel analyzer on
     the digital oscilloscope platform. This is a novel method based on
     Waveform Peak Detection function which allows detailed analysis of the
     acquired signal. The optimal treatment of the detector signal from
     various detector types is achieved by mathematical processing only. As a
     result, the possibility of an increase of signal/noise ratio is
     presented.,
  DOI = 10.1007/s10751-008-9580-5,
  ISSN = 0304-3843,
  Unique-ID = ISI:000256911000001,
  

2006

• R. Prochazka, M. Maslan, J. Pechousek, and D. Jancik, "Optimizing the features of the single-channel analyzer towards
  improvement of productivity of Mossbauer," CZECHOSLOVAK JOURNAL OF PHYSICS, vol. 56, iss. E, pp. E133-E137, 2006.
  [Bibtex]

  @article ISI:000249124100015,
  Author = Prochazka, R. and Maslan, M. and Pechousek, J. and Jancik, D.,
  Title = Optimizing the features of the single-channel analyzer towards
     improvement of productivity of Mossbauer,
  Journal = CZECHOSLOVAK JOURNAL OF PHYSICS,
  Year = 2006,
  Volume = 56,
  Number = E,
  Pages = E133-E137,
  Note = International Colloquium on Mossbauer Spectroscopy in Materials Science,
     Kocovce, SLOVAKIA, JUN 11-15, 2006,
  Abstract = The statistical quality (productivity) of the Mossbauer spectra is one
     of the most important features characterizing the Mossbauer
     spectrometer. Optimizing the discrimination part of the spectrometer
     including the novel way of selection represents a route how to increase
     the spectrum productivity.,
  DOI = 10.1007/s10582-006-0479-6,
  ISSN = 0011-4626,
  Unique-ID = ISI:000249124100015,
  

2005

• J. Pechousek and M. Mashlan, "Mossbauer spectrometer as a virtual instrument in the PXI/CompactPCI
  modular system," CZECHOSLOVAK JOURNAL OF PHYSICS, vol. 55, iss. 7, pp. 853-863, 2005.
  [Bibtex]

  @article ISI:000231635800010,
  Author = Pechousek, J and Mashlan, M,
  Title = Mossbauer spectrometer as a virtual instrument in the PXI/CompactPCI
     modular system,
  Journal = CZECHOSLOVAK JOURNAL OF PHYSICS,
  Year = 2005,
  Volume = 55,
  Number = 7,
  Pages = 853-863,
  Month = JUL,
  Note = International Colloquium on Mossbauer Spectroscopy in Materials Science,
     Vsemina, CZECH REPUBLIC, JUN 01-04, 2004,
  Abstract = A new programming method has been used for building a computer-based
     Mossbauer spectrometer. Data acquisition is realized via two
     commercially available PXI/Compact-PCI modules or PCI devices which are
     supported by relevant software drivers. Both modules, the digital
     oscilloscope NI 5102 and the function generator NI 5401 (National
     Instruments Inc.), can be used in the PXI or PC standard. The
     synchronization between the velocity signal generation and the impulse
     detection is controlled by a RTSI (Real-Time System Integration) bus. A
     virtual Mossbauer spectrometer is implemented by the graphical
     programming language called LabVIEW 7 Express. The amplitude selection
     of impulses from the detector output is realized with an assistance of
     the Waveform Peak Detection.vi function. The sampling rate of the
     detector output signal and the frequency of the velocity signal
     determinate the number of registration channels of measured Mossbauer
     spectrum. The Mossbauer spectra can be accumulated in the constant or
     variable velocity modes; moreover, there is a possibility to register
     gamma-ray spectra in the multichannel analyzer mode.,
  DOI = 10.1007/s10582-005-0087-x,
  ISSN = 0011-4626,
  Unique-ID = ISI:000231635800010,
  

• J. Pechousek, N. Mashlan, and R. Zboril, "Mossbauer spectrometer in the PXI/CompactPCI modular system," in INDUSTRIAL APPLICATIONS OF THE MOSSBAUER EFFECT, 2005, pp. 384-388.
  [Bibtex]

  @inproceedings ISI:000229434000060,
  Author = Pechousek, J and Mashlan, N and Zboril, R,
  Editor = Gracia, M and Marco, JF and Plazaola, F,
  Title = Mossbauer spectrometer in the PXI/CompactPCI modular system,
  Booktitle = INDUSTRIAL APPLICATIONS OF THE MOSSBAUER EFFECT,
  Series = AIP Conference Proceedings,
  Year = 2005,
  Volume = 765,
  Pages = 384-388,
  Note = International Symposium on the Industrial Applications of the Mossbauer
     Effect, Madrid, SPAIN, OCT 04-08, 2004,
  Organization = Spansh Sci Council,
  Abstract = Two commercially available modules, a digital oscilloscope (NI 5102) and
     a function generator (NI 5401) in the P)G (PCI eXtension for
     Instrumentation) or PCI standard from National Instruments Inc.,
     supported by the driver software, have been used for building a
     computer-based Mossbauer spectrometer. The RTSI (Real-Time System
     Integration) bus is used for synchronizing the accumulation of the
     detector impulses to the Mossbauer spectrum with velocity of the
     ``source-sample'' relative motion. The amplitude selection of the
     impulses from the detector output is based on the use of the Waveform
     Peak Detection. vi function. This function is available in the graphical
     programming environment LabVIEW 7 Express which serves for an
     implementation of the virtual instrument of the Mossbauer spectrometer.
     Mossbauer spectra can be accumulated in the constant and variable
     velocity modes; moreover, there is a possibility to register gamma-ray
     spectra in the multichannel analyzer mode. Two types of the detectors (a
     NaI(T1) and a resonance scintillation detector) have been used with the
     new Mossbauer spectrometer.,
  ISSN = 0094-243X,
  ISBN = 0-7354-0250-7,
  Unique-ID = ISI:000229434000060,
  

• H. Bartonkova, M. Mashlan, R. Zboril, J. Pechousek, O. Schneeweiss, and P. Martinec, "Mossbauer study of iron oxide modified montmorillonite," HYPERFINE INTERACTIONS, vol. 165, iss. 1-4, pp. 221-225, 2005.
  [Bibtex]

  @article ISI:000243551500033,
  Author = Bartonkova, H. and Mashlan, M. and Zboril, R. and Pechousek, J. and
     Schneeweiss, O. and Martinec, P.,
  Title = Mossbauer study of iron oxide modified montmorillonite,
  Journal = HYPERFINE INTERACTIONS,
  Year = 2005,
  Volume = 165,
  Number = 1-4,
  Pages = 221-225,
  Note = 28th International Conference on the Applications of the Mossbauer
     Effect (ICAME 2005), Montpellier, FRANCE, SEP 04-09, 2005,
  Organization = LAMMI UMR; CNRS,
  Abstract = Montmorillonite particles were modified by iron oxides using the
     precipitation process with the aim to monitor the differences in the
     structural and magnetic properties of intercalated and adsorbed Fe3+.
     The Mossbauer spectra recorded at 5 K in zero and 6 T external fields,
     IR spectra and TG curves measured in zero and 32 mT fields identified
     the ferrihydrite pillars in an interlayer space of the montmorillonite
     structure and gamma-Fe2O3 nanoparticles adsorbed on the mineral surface.
     The temperature dependent Mossbauer spectra (25-300 K) reflect the
     superparamagnetic behaviour of maghemite nanoparticles and ferrihydrite
     pillars with the blocking temperatures of about 80 and 25 K,
     respectively.,
  DOI = 10.1007/s10751-006-9269-6,
  ISSN = 0304-3843,
  Unique-ID = ISI:000243551500033,
  

2004

• M. Mashlan, V. Yevdokimov, J. Pechousek, R. Zboril, and A. Kholmetskii, "Mossbauer spectrometer with novel moving system and resonant detection
  of gamma rays," HYPERFINE INTERACTIONS, vol. 156, iss. 1, pp. 15-19, 2004.
  [Bibtex]

  @article ISI:000224130500004,
  Author = Mashlan, M and Yevdokimov, V and Pechousek, J and Zboril, R and
     Kholmetskii, A,
  Title = Mossbauer spectrometer with novel moving system and resonant detection
     of gamma rays,
  Journal = HYPERFINE INTERACTIONS,
  Year = 2004,
  Volume = 156,
  Number = 1,
  Pages = 15-19,
  Month = JUN-SEP,
  Note = 27th International Conference on the Applications of the Mossbauer
     Effect, Muscat, OMAN, SEP 21-25, 2003,
  Abstract = A Mossbauer spectrometer with the collective synchronous motion of the
     radioactive source and resonant detector has been built. The new special
     transducer with four drive coils and one velocity pickup coil has been
     developed. The polyamide fibers serve as suspension brackets, barium
     ferrite magnets are used. The mechanical construction of transducer
     allows using different cryostats and furnaces, because the sample is
     immovable. The resonant detector consists of the thin foil of the
     organic plastic scintillator with the dissolved substance converting the
     resonant gamma rays to conversion electrons.,
  DOI = 10.1023/B:HYPE.0000043202.86190.55,
  ISSN = 0304-3843,
  Unique-ID = ISI:000224130500004,