Implementation of gamma-ray instrumentation for solid solar system bodies using neutron activation method

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2016-06, Vol.822, p.112-124
• Main Authors: Litvak, M.L., Golovin, D.V., Jun, I., Kozyrev, A.S., Mitrofanov, I.G., Sanin, A.B., Shvetsov, V.N., Timoshenko, G.N., Zontikov, A.
• Format: Article
• Language: English
• Subjects: Accelerators; Activation; Activation analysis; Active gamma spectrometer; Aluminum; Elemental abundances; Gamma ray spectrometers; Ground tests; Instrumentation; Pulse neutron generator; Solar system; Surface measurements
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/j.nima.2016.03.087

In this paper we present the results of ground tests performed with a flight model and with industry prototypes of passive and active gamma ray spectrometers with the objective of understanding their capability to distinguish the elemental composition of planetary bodies in the solar system. The gamma instrumentation, which was developed for future space missions was used in the measurements at a special ground test facility where a simulant of planetary material was fabricated with a martian-like composition. In this study, a special attention was paid to the gamma lines from activation reaction products generated by a pulsed neutron generator. The instrumentation was able to detect and identify gamma lines attributed to O, Na, Mg, Al, Si, K, Ca and Fe.