Mercuric Iodide Anticoincidence Shield for Gamma-Ray Spectrometer, Phase I

Metadata Updated: May 2, 2019

We propose to utilize a new detector material, polycrystalline mercuric iodide, for background suppression by active anticoincidence shielding in gamma-ray spectrometers. Two proposed NASA missions will require anticoincidence shielding for gamma-ray spectrometers: the Mars Lander and a Space Science Vision Mission expected to visit Titan, one of Saturn?s moons. Shielding improves the performance of gamma-ray spectrometers by reducing the effect of charged particle interactions which can not be distinguished from true gamma-ray interactions by the spectrometer. Active shields produce a blanking signal when a charged particle is detected, so that the signal from the spectrometer can be ignored during the spectrometer?s charged-particle interaction. While it is well know that this technique produces significant improvement in gamma-ray spectrometer performance, the technology to implement it is lacking. The attributes of mercuric iodide make it an excellent candidate for anticoincidence shielding detectors. Because of its detection characteristics, light weight, small size, low cost, robustness, and ease of application to non-planar geometries, this material can replace the costly, heavy, and bulky scintillator/photomultiplier tube (PMT) systems currently in use. The application of this new material for space-based astrophysical observations will provide excellent background suppression with improved mass and volume characteristics.

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019

Metadata Source

Harvested from NASA Data.json

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Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_4987
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Datagov Dedupe Retained 20190501230127
Harvest Object Id 6abb13b0-f99d-4edc-975c-bafe26e7c6fc
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2004-07-01
Homepage URL
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash dd461a2d3e6e1a77e42070cee0ae9fac1a41ba80
Source Schema Version 1.1

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