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Proceedings Paper

Development of a quasi-monoenergetic 6 MeV gamma facility
Author(s): Suzanne F. Nowicki; Stanley D. Hunter; Julia G. Bodnarik; Michael P. Dion; Ann M. Parsons; Jeffrey Schweitzer; Seunghee Son
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Paper Abstract

The Advanced Energetic Pair Telescope (AdEPT) will explore the universe in the medium-energy range from about 5 MeV to greater than 200 MeV via gamma-ray pair production. AdEPT will provide high angular resolution observations and for the first time high polarization sensitivity over this essentially unexplored energy range. The NASA/GSFC quasi-monoenergetic 6 MeV Gamma Facility was built to characterize detector’s response of planetary science and astrophysics instrumentation to be done in house. It will provide the ability to study pair production imaging of the AdEPT pair telescope at the difficult low end of its energy range. There is no natural radioactive isotope that provides a gamma ray with energy above the 2.614 MeV line of 228Th. The quasi-monoenergetic 6 MeV gamma-ray source provides a calibration point at significantly higher energy and is thus necessary to the design and testing of astrophysics and planetary neutron/gamma-ray instruments. This paper presents the mechanical design of the facility and the measured activity of the source.

Paper Details

Date Published: 25 September 2012
PDF: 7 pages
Proc. SPIE 8443, Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray, 844337 (25 September 2012); doi: 10.1117/12.925473
Show Author Affiliations
Suzanne F. Nowicki, NASA Goddard Space Flight Ctr. (United States)
Univ. of Michigan (United States)
Stanley D. Hunter, NASA Goddard Space Flight Ctr. (United States)
Julia G. Bodnarik, NASA Goddard Space Flight Ctr. (United States)
Michael P. Dion, NASA Goddard Space Flight Ctr. (United States)
Ann M. Parsons, NASA Goddard Space Flight Ctr. (United States)
Jeffrey Schweitzer, Univ. of Connecticut (United States)
Seunghee Son, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 8443:
Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray
Tadayuki Takahashi; Stephen S. Murray; Jan-Willem A. den Herder, Editor(s)

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