Pulse-Height and 2-D Charge-Spread Single-Pixels Studies on a LuYAP:Ce Scintillation Array

The present work deals with a 10 × 10 array of (Lu0.7Y0.3)AP:Ce 2 × 2 × 10 mm3 pixels, manufactured by Crytur (Cz), that has been utilized in a previous paper. The crystal-array has been coupled to an 8 × 8 anodes H10966 model Hamamatsu (Jp) Position-Sensitive Photo Multiplier Tube (PSPMT) connected to electronics for single events scintillation read-out. The response of such a detector has been studied under Co-57, or Ba-133, or Cs-137 gamma-ray emissions, as well as with Lu-176 self-activity only. The present work is aimed at characterizing the individual crystal-pixels’ single-event responses in terms of pulse-height and of spreads of the 2-D charge-distributions. In particular, the charge-spread characterization pointed out several defects in the crystal-array assembly, not detected by usual pulse-height studies. The diagnostic method based on charge-spread analysis seems also well suited for scintillation array characterizations for gamma-ray detectors studies, as well as for quality controls of such pixelated devices during the lifetime of systems in the field of radionuclide medical imaging (SPECT and PET). The method is also appropriate for other applications where gamma-ray spectroscopy is required, like nuclear physics, astrophysics, astroparticle physics, homeland security, and non-proliferation.

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GAMMA-RAY SPECTROSCOPY AT GANIL

International Journal of Modern Physics E ◽

10.1142/s0218301306005472 ◽

2006 ◽

Vol 15 (08) ◽

pp. 1957-1965

Author(s):

G. DE FRANCE

Keyword(s):

Reaction Mechanism ◽

Nuclear Structure ◽

Nuclear Physics ◽

Gamma Ray ◽

Gamma Ray Spectroscopy ◽

Comprehensive Picture ◽

Clear Identification

Gamma-ray spectroscopy associated to the clear identification of the emitting nuclei is a key to understand in a coherent way the nuclear structure of the elements located far from stability. The coupling of very efficient gamma-ray arrays and spectrometers has pushed away the limits and opened up new possibilities in nuclear physics studies. These combinations give access to a comprehensive picture of both the reaction mechanism and the nuclear structure of a given nucleus. In this talk, the various possibilities offered at GANIL with such a coupling will be given.

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Position-sensitive analysis in curved-crystal three-axis neutron spectrometry (quasielastic scattering case)

Journal of Applied Crystallography ◽

10.1107/s0021889899012947 ◽

2000 ◽

Vol 33 (1) ◽

pp. 147-155 ◽

Cited By ~ 2

Author(s):

A. D. Stoica ◽

M. Popovici ◽

W. B. Yelon ◽

R. Berliner

Keyword(s):

Silicon Wafers ◽

Space Theory ◽

Quasielastic Scattering ◽

Neutron Spectrometry ◽

Cold Source ◽

Demonstration Experiment ◽

Phase Space Theory ◽

Position Sensitive ◽

The Individual ◽

The Right

The use of bent perfect crystals in focusing three-axis neutron spectrometry with position-sensitive detection (PSD) is analyzed on the basis of a phase-space theory. With PSD, the usual sequential scans are replaced by simultaneous scans. The case of high resolution in energy transfer is considered in detail. With commercial thin silicon wafers, the achievable resolutions are in the 10–150 µeV range, depending on neutron energy. Resolutions around 10 µeV are obtained on the peak of cold-source spectra. To take advantage of the possibilities offered by silicon wafers, PSD with spatial resolution well below 1 mm will be needed. With PSD analysis, a new kind of focusing exists that allows the thickness of bent perfect analyzer crystals to be increased, providing an intensity gain at no resolution loss. With multilamella assemblies a gain in count rate by the number of lamellae in the packet is achievable. Results of a demonstration experiment are presented, confirming that under the right conditions, a multilamella analyzer may resemble a single bent wafer, the individual curves of many wafers having been combined to provide the intensity gain.

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Development of x-ray and gamma-ray CZT detectors for homeland security applications

10.1117/12.850113 ◽

2010 ◽

Cited By ~ 3

Author(s):

Kuen Lee ◽

J. W. Martin ◽

A. B. Garson III ◽

M. Beilicke ◽

Q. Guo ◽

...

Keyword(s):

Homeland Security ◽

Gamma Ray ◽

X Ray ◽

Security Applications ◽

Czt Detectors

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A CdTe Position Sensitive Detector for a Hard X-and Gamma-Ray Wide Field Camera

MRS Proceedings ◽

10.1557/proc-487-275 ◽

1997 ◽

Vol 487 ◽

Cited By ~ 1

Author(s):

E. Caroli ◽

G. Bertuccio ◽

G. De Cesare ◽

A. Donati ◽

W. Dusi ◽

...

Keyword(s):

Energy Range ◽

Gamma Ray ◽

Basic Element ◽

Medium Size ◽

Electromagnetic Spectrum ◽

Wide Field ◽

Cdte Detector ◽

Important Region ◽

Expected Performance ◽

Position Sensitive

AbstractAn important region of the electromagnetic spectrum for astrophysics is the hard X- and gamma ray band between 10 keV and a few MeV, where several processes occur in a wide variety of objects and with different spatial distribution and time scales. In order to fulfill the observational requirements in this energy range and taking into account the opportunities given by small/medium size missions (e.g. on the ISS), we have proposed a compact, wide field camera based on a thick (1 cm) position sensitive CdTe detector (PSD). The detector is made of an array of 128×96 CdTe microspectrometers with a pixel size of 2×2 mm2. The basic element of the PSD is the linear module that is an independent detection unit with 32 CdTe crystals and monolithic front-electronics (ASIC) supported by a thin (300 μm) ceramic layer. The expected performance of the PSD over the operative energy range and some of the required ASIC functionality are presented and discussed.

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An analysis method of gamma-ray pulse-height distributions obtained with a Ge(Li) detector

Nuclear Instruments and Methods ◽

10.1016/0029-554x(75)90466-8 ◽

1975 ◽

Vol 125 (4) ◽

pp. 507-523 ◽

Cited By ~ 27

Author(s):

Nobuo Sasamoto ◽

Kinji Koyama ◽

Shun-Ichi Tanaka

Keyword(s):

Gamma Ray ◽

Pulse Height ◽

Analysis Method

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Public service motivation and willingness to collaborate

Evidence-based HRM a Global Forum for Empirical Scholarship ◽

10.1108/ebhrm-07-2013-0018 ◽

2014 ◽

Vol 2 (1) ◽

pp. 80-95 ◽

Cited By ~ 2

Author(s):

Heather Getha-Taylor ◽

Alexa Haddock-Bigwarfe

Keyword(s):

Homeland Security ◽

Public Service ◽

Public Service Motivation ◽

The Body ◽

Organizational Level ◽

Cross Sectional ◽

Content Type ◽

Individual Level ◽

Original Survey ◽

The Individual

Purpose – The purpose of this paper is to examine public service motivation (PSM) and the connection with collaborative attitudes among a sample of homeland security actors representing the public, private, and nonprofit sectors. Design/methodology/approach – This study examines relationships between measures of PSM and collaboration using original survey data and hierarchical multiple regression. Findings – Findings reveal strong positive relationships between PSM measures and attitudes toward collaboration at the individual and organizational level. Research limitations/implications – Survey results are cross-sectional and are from respondents participating in a single state's homeland security summit. Practical implications – It is expected that results can be used to enhance collaboration at the individual and organizational levels. At the organizational level, results can be used for matching individuals with collaborative opportunities. At the individual level, results can be used for enhanced self-reflection and effectiveness purposes. Originality/value – This study provides insights on the relationship between PSM measures and collaborative attitudes. The research contributes to the body of scholarly work connecting PSM and correlates of interest.

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Experimental Study of Using a 3-D Position Sensitive CdZnTe Detector for Proton Beam Range Verification

10.36227/techrxiv.13717834.v1 ◽

2021 ◽

Author(s):

Valerie Nwadeyi ◽

Paul maggi ◽

Zhong He ◽

Jerimy Polf

Keyword(s):

Proton Beam ◽

Expectation Maximization ◽

Gamma Ray ◽

Prompt Gamma ◽

Cdznte Detector ◽

Maximum Likelihood Expectation Maximization ◽

Gamma Ray Imaging ◽

Position Sensitive ◽

Beam Range ◽

Range Verification

This manuscript discusses the use of a large volume array CZT detector for experimental prompt gamma-ray imaging. Namely, the 718 keV and the 4.44 MeV photopeaks produced from proton-carbon interactions are imaged using maximum likelihood expectation maximization (MLEM). Various proton beam irradiations are used to characterize the feasibility of using both photopeaks for beam range verification.

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Some Interesting Work on Capillary Glass Detectors

Innovative Applications and Developments of Micro-Pattern Gaseous Detectors - Advances in Chemical and Materials Engineering ◽

10.4018/978-1-4666-6014-4.ch006 ◽

2014 ◽

pp. 103-113

Keyword(s):

Gamma Ray ◽

X Rays ◽

Glass Capillary ◽

Large Area ◽

Vacuum Technology ◽

Gas Atmosphere ◽

Gamma Ray Imaging ◽

Position Sensitive ◽

Primary Electrons ◽

Glass Detectors

In this chapter, the progress of the development of glass capillary plates is described. In some applications, capillary plates have advantages over GEM or other gaseous detectors. For example, they are compatible with vacuum technology allowing them to be used in sealed gaseous detectors. Prototypes of capillary plates combined with photocathodes sensitive to ultraviolet and visible light were the first to be developed and successfully tested. These detectors resemble vacuum imaging microchannel plates, widely used in many applications. However, the glass capillary plates operate in gas atmosphere and in avalanche mode. This offers a possibility to build large area position-sensitive photomultipliers since at atmospheric pressure there are no serious mechanical constrains on the window. Since glass has a high density, the capillary plate can also be used as efficient convertors of X-rays, and be used at the same time as a multiplication structure for the created primary electrons. Such a device is attractive for X-ray and gamma ray imaging and the first successful tests of a prototype of such a detector are described.

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