Spectroscopy and imaging performance of the liquid xenon gamma-ray imaging telescope (LXeGRIT)

被引：15

作者：

Aprile, E ^{[1
]}

Curioni, A ^{[1
]}

Egorov, V ^{[1
]}

Giboni, KL ^{[1
]}

Oberlack, UG ^{[1
]}

Ventura, S ^{[1
]}

Doke, T ^{[1
]}

Kikuchi, J ^{[1
]}

Takizawa, K ^{[1
]}

Chupp, EL ^{[1
]}

Dunphy, PP ^{[1
]}

机构：

[1] Columbia Univ, Astrophys Lab, New York, NY 10027 USA

来源：

X-RAY AND GAMMA-RAY INSTRUMENTATION FOR ASTRONOMY XI | 2000年 / 4140卷

关键词：

gamma-rays; instrumentation; imaging; telescope; balloon missions; high energy astrophysics;

D O I：

10.1117/12.409129

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 cm(2) area and 7 cm drift gap, is filled with high purity LXe. Both ionization and scintillation light signals 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 Na-22, Cs-137, Y-88 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 DeltaE/E = 8.8% root 1MeV/E. Compton imaging of 88Y gamma -ray events with two detected interactions is consistent with an angular resolution of similar to 3 degrees (RMS) at 1.8 MeV.

引用

页码：333 / 343

页数：11

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