Study of energy response of Gd2SiO5:Ce3+scintillator for the ASTRO-E hard X-ray detector

被引：28

作者：

Uchiyama, Y

Kouda, M

Tanihata, C

Isobe, N

Takahashi, T

Murakami, T

Tashiro, M

Makishima, K

Fukazawa, Y

Kamae, T

机构：

[1] Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan

[2] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[3] Saitama Univ, Dept Phys, Urawa, Saitama 3388570, Japan

[4] Hiroshima Univ, Dept Phys Sci, Higashihiroshima 7398526, Japan

来源：

IEEE TRANSACTIONS ON NUCLEAR SCIENCE | 2001年 / 48卷 / 03期

关键词：

Gd2SiO5 (GSO); scintillator; X-ray;

D O I：

10.1109/23.940084

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The energy-dependent response of the crystalline oxide scintillator Gd2SiO5:Ce3+ (GSO:Ce) is studied in the energy range from 14 to 662 keV as a part of the preflight calibration of the hard X-ray detector (HXD) onboard the ASTRO-E satellite. In the relation between photon energy deposited and light yields, there exists nonproportionality and discontinuity around the energy of the gadolinium K-edge (50.2 keV). In 16 GSO scintillator units of the HXD flight model, the same characteristics of the energy response are confirmed. To evaluate the response across the K-edge quantitatively, we measure the "electron response" by means of the Compton coincidence technique. By using the electron response of the GSO crystal, we calculate the light yield nonproportionality as a function of deposited photon energy. We find that a photopeak line profile of the 59.5-keV emission of Am-241 is well modeled by a composite Gaussian. This will be discussed in terms of the light yield nonproportionality.

引用

页码：379 / 384

页数：6

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