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Imaging Plates in Synchrotron and Conventional X-Ray Crystallographic Data Collection

100%
Dauter Z., Wilson K. S.
|
EN
Application of two-dimensional detectors based on imaging plates for X-ray crystallographic data collection is discussed. The properties of imaging plates are somewhat different from those of other available X-ray detectors, like film, multiwire ionization chambers, TV tubes or scintillation counters. Imaging plate scanners are well suited for laboratory X-ray sources as well as for strong synchrotron radiation. Originally developed for macromolecular crystallography, they can be used successfully to collect data on crystals of small or medium size molecules.
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Monte Carlo Simulations of Resistive Plate Chamber for 0.511 MeV Photon with FLUKA

80%
Demir N., Aydın A.
Acta Physica Polonica A
|
2016
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vol. 130
|
issue 1
466-468
EN
We report the simulation results of resistive plate chamber for 0.511 MeV photons using FLUKA code. The efficiency of resistive plate chamber is directly related to the number of electrons produced in the gas gap. Therefore, the type of converter materials and thickness are important parameters for resistive plate chamber detection performance. In this work, the FLUKA based simulations for parallel and isotropic photons were operated for detection efficiency by choosing different converter materials and thicknesses.
3
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Application of Straw Tube Detectors to Hyperon Studies

80%
Jowzaee S.
Acta Physica Polonica A
|
2015
|
vol. 127
|
issue 5
1531-1532
EN
A high statistics measurement of the p̅p → pK⁺Λ reaction was done with the COSY-TOF experiment. The proton beam was polarized up to more than 80%, and its momentum was 2.95 GeV/c. The reconstruction of the pK⁺Λ events was done only with the straw tube tracker due to the higher spatial resolution of the straw tube tracker compared to other subdetectors. The Dalitz plot of the pK⁺Λ events was analyzed to understand the reaction mechanism and presented in this paper. The Dalitz plot shows that the COSY-TOF experiment provides complete kinematic coverage of the phase space of this reaction which made it ideal for p̅p → pK⁺Λ reaction analysis. The influence of different physical effects as pΛ final state interaction, excited nucleon states (N*-resonances) and a coupled channel effect of NΣ-pΛ (NΣ cusp effect) produce significant structures in the Dalitz plot. The angular distribution of the particles in the CMS and helicity frame was also presented in this paper.
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