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Proceedings Paper

Spectroscopy and imaging performance of the Liquid Xenon Gamma-Ray Imaging Telescope (LXeGRIT)
Author(s): Elena Aprile; Alessandro Curioni; Valeri Egorov; Karl-Ludwig Giboni; Uwe G. Oberlack; Sandro Ventura; Tadayoshi Doke; Jun Kikuchi; Kyoko Takizawa; Edward L. Chupp; Philip P. Dunphy
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Paper Abstract

LXeGRIT is a balloon-borne Compton telescope based on a liquid xenon time projection chamber (LXeTPC) for imaging cosmic (gamma) -rays in the energy band of 0.2 - 20 MeV. The detector, with 400 cm2 area and 7 cm drift gap, is filled with high purity LXe. Both ionization and scintillation light signal are detected to measure the energy deposits and the three spatial coordinates of individual (gamma) -ray interactions within the sensitive volume. The TPC has been characterized with repeated measurements of its spectral and Compton imaging response to (gamma) -rays from radioactive sources such as 22Na, 137Cs, 88Y and Am-Be. The detector shows a linear response to g-rays in the energy range 511 keV - 4.4 MeV, with an energy resolution (FWHM) of (Delta) E/E equals 8.8% (root)1MeV/E. Compton imaging of 88Y (gamma) -ray events with two detected interactions is consistent with an angular resolution of approximately 3 degrees (RMS) at 1.8 MeV.

Paper Details

Date Published: 13 December 2000
PDF: 11 pages
Proc. SPIE 4140, X-Ray and Gamma-Ray Instrumentation for Astronomy XI, (13 December 2000); doi: 10.1117/12.409129
Show Author Affiliations
Elena Aprile, Columbia Univ. (United States)
Alessandro Curioni, Columbia Univ. (United States)
Valeri Egorov, Columbia Univ. (United States)
Karl-Ludwig Giboni, Columbia Univ. (United States)
Uwe G. Oberlack, Columbia Univ. (United States)
Sandro Ventura, Columbia Univ. and INFN (Italy)
Tadayoshi Doke, Waseda Univ. (Japan)
Jun Kikuchi, Waseda Univ. (Japan)
Kyoko Takizawa, Waseda Univ. (Japan)
Edward L. Chupp, Univ. of New Hampshire (United States)
Philip P. Dunphy, Univ. of New Hampshire (United States)


Published in SPIE Proceedings Vol. 4140:
X-Ray and Gamma-Ray Instrumentation for Astronomy XI
Kathryn A. Flanagan; Oswald H. W. Siegmund, Editor(s)

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