Measurement of background 0.1- to 2.0-MeV gamma-ray radiation onboard the orbital station MIR

S. V. Krivov; Valery V. Dmitrenko; A. M. Galper; V. M. Grachev; V. I. Lyagushin; S. I. Sutchkov; Sergey E. Ulin; Z. M. Uteshev; K. F. Vlasik; Yu. T. Yurkin

doi:10.1117/12.186830

16 September 1994 Measurement of background 0.1- to 2.0-MeV gamma-ray radiation onboard the orbital station MIR

S. V. Krivov, Valery V. Dmitrenko, A. M. Galper, V. M. Grachev, V. I. Lyagushin, S. I. Sutchkov, Sergey E. Ulin, Z. M. Uteshev, K. F. Vlasik, Yu. T. Yurkin

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Proceedings Volume 2280, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V; (1994) https://doi.org/10.1117/12.186830
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

The high pressure xenon ionization chamber was designed for measurements gamma-ray lines from cosmic sources. This chamber was installed on board of the orbital station 'MIR' and the measurements are carried out. The 1 liter's chamber was filled with 0.6 g/cm³ density xenon. The energy resolution is 3% FWHM at energy 1 MeV. This experiment has been lasting for about four years on board of the heavy orbital station. Measured background gamma-ray spectra are presented. The background gamma- ray flux is mostly generated by interaction of cosmic rays with the vessel mass. A considerable abundance in energy region 170- 260 keV was registered. This abundance is produced by the radioactive source located in uranium shield on board of transport spacecraft. Also the 511 keV annihilation line was observed. Its intensity has obvious latitude dependence. Therefore it is generated by interaction of cosmic ray with the vessel matter. The strong gamma background decreases significantly the instrument sensibility to gamma-ray bursts.

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S. V. Krivov, Valery V. Dmitrenko, A. M. Galper, V. M. Grachev, V. I. Lyagushin, S. I. Sutchkov, Sergey E. Ulin, Z. M. Uteshev, K. F. Vlasik, and Yu. T. Yurkin "Measurement of background 0.1- to 2.0-MeV gamma-ray radiation onboard the orbital station MIR", Proc. SPIE 2280, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V, (16 September 1994); https://doi.org/10.1117/12.186830

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KEYWORDS

Gamma radiation

Spectroscopy

Xenon

Physics

Space operations

Sensors

Uranium

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