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Title: CdxZn1-xTeySe1-y (CZTS): An Emerging High-Performance Gamma-Ray Detector

Abstract

The goal is to develop growth technology to produce CZTS radiation detectors better than today?s large-volume CZT and at a lower price.

Authors:
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20)
OSTI Identifier:
1354627
Report Number(s):
BNL-113706-2017-CP
DOE Contract Number:
SC00112704
Resource Type:
Conference
Resource Relation:
Conference: Nuclear Security Applications and Development Program Review Meeting (NSARD2017); NNSA Las VegasNorth Las Vegas Facility, NV; 20170404 through 20170406
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CdxZn1-xTeySe1-y; CZTS; High Performance Gamma-Ray Detector

Citation Formats

ROY U. CdxZn1-xTeySe1-y (CZTS): An Emerging High-Performance Gamma-Ray Detector. United States: N. p., 2017. Web.
ROY U. CdxZn1-xTeySe1-y (CZTS): An Emerging High-Performance Gamma-Ray Detector. United States.
ROY U. Tue . "CdxZn1-xTeySe1-y (CZTS): An Emerging High-Performance Gamma-Ray Detector". United States. doi:. https://www.osti.gov/servlets/purl/1354627.
@article{osti_1354627,
title = {CdxZn1-xTeySe1-y (CZTS): An Emerging High-Performance Gamma-Ray Detector},
author = {ROY U.},
abstractNote = {The goal is to develop growth technology to produce CZTS radiation detectors better than today?s large-volume CZT and at a lower price.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 04 00:00:00 EDT 2017},
month = {Tue Apr 04 00:00:00 EDT 2017}
}

Conference:
Other availability
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  • The goal of the proposed project is to develop CZTS radiation detectors with: High compositional uniformity. Fewer defects. Better performance. Higher yield and lower cost than today’s CZT. All from as-grown ingots !!!
  • The Transient Gamma-Ray Spectrometer (TGRS) to be flown aboard the WIND spacecraft is primarily designed to perform high resolution spectroscopy of transient [gamma]-ray events, such as cosmic [gamma]-ray bursts and solar flares, over the energy range 15 keV to 8.2 MeV with an unexpected spectroscopic resolution of 2 keV at 1 MeV. The detector itself consists of a 215 cc high purity n-type Ge crystal kept at cryogenic temperatures by a passive radiative cooler. The geometric field of view defined by the cooler is about 1.8 [pi] steradian. To avoid continuous triggers caused by soft solar events, a thin BeCumore » sun-shield around the sides of the cooler has been provided. A passive Mo/Pb occulter, which modulates signals from within [plus minus]5[degree] of the ecliptic plane at the spacecraft spin frequency, is used to identify and study solar flares, as well as emission from the galactic plane and center.« less
  • The surface preparation technology of CdSe crystals used for room temperature gamma-ray detection has been studied. X-ray fluorescense analysis of the surface of the crystal exposed to the Br-methanol etchant revealed the production of CdBr/sub 2/ compound as a result of the crystal-etchant reaction. The CdBr/sub 2/ ''poisoning'' causes high surface leakage currents increasing significantly the electronic noise of the device. A modified etching process has been developed in present work allowing to reduce greatly the surface leakage. Prominent reduction in the noise threshold with a simultaneous improvement of the energy resolution of CdSe detectors is reported.
  • No abstract prepared.
  • The Soft Gamma-ray Detector (SGD) on board the NeXT (Japanese future high energy astrophysics mission) is a Compton telescope with narrow field of view (FOV), which utilizes Compton kinematics to enhance its background rejection capabilities. It is realized as a hybrid semiconductor gamma-ray detector which consists of silicon and CdTe (cadmium telluride) detectors. It can detect photons in a wide energy band (0.05-1 MeV) at a background level of 5 x 10{sup -7} counts/s/cm{sup 2}/keV; the silicon layers are required to improve the performance at a lower energy band (<0.3 MeV). Excellent energy resolution is the key feature of themore » SGD, allowing it to achieve both high angular resolution and good background rejection capability. An additional capability of the SGD, its ability to measure gamma-ray polarization, opens up a new window to study properties of astronomical objects. We will present the development of key technologies to realize the SGD: high quality CdTe, low noise front-end ASIC and bump bonding technology. Energy resolutions of 1.7 keV (FWHM) for CdTe pixel detectors and 1.1 keV for Si strip detectors have been measured. We also present the validation of Monte Carlo simulation used to evaluate the performance of the SGD.« less