Accession Number : ADA136681

Title :   Shuttle Flight Test of an Advanced Gamma-Ray Detection System.

Descriptive Note : Final scientific rept. 1 Oct 82-31 Mar 83,

Corporate Author : FLORIDA UNIV GAINESVILLE SPACE ASTRONOMY LAB

Personal Author(s) : Rester,A C , Jr

PDF Url : ADA136681

Report Date : Nov 1983

Pagination or Media Count : 20

Abstract : The Space Astronomy Laboratory plans to fly an advanced gamma-ray spectrometer aboard a future Shuttle flight. The 'GRAD' spectrometer employs a new bismuth germanate (BGO) anticompton shield and n-type high purity germanium detector. BGO, because of its high atomic number, requires only 1/12 the volume and 1/6 the weight of an equally sensitive sodium iodide crystal. The n-type germanium detector is at least 25 times more resistant to neutron radiation damage than a conventional detector and has a very broad spectral response of 5 keV to 10 MeV. Neither of these materials has been subjected to the space environment as working components of a detector system. The radioactivation of the new detector materials by cosmic rays and fast neutrons, as well as other effects of launching, landing and operation in the space environment on the detector system will be monitored and calibrated. Early information on gamma-ray background from activation of the shuttle itself will also be obtained. In addition to the technological information derived from the experiment, high energy-resolution spectra of the sun and the galactic center will be taken. (Author)

Descriptors :   *Gamma spectrometers, Gamma ray spectroscopy, Gamma ray cross sections, Space shuttles, Neutrons, Radiation hardening, Radiation shielding, Space environments, Spacecraft components, Space stations, Radiation damage, Bismuth compounds, Germanates

Subject Categories : Nuclear Radiation Shield, Protection & Safety
      Nuclear Physics & Elementary Particle Physics
      Manned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE