PRECISE MEASUREMENT OF BETA-RAY MAXIMUM ENERGY BY HPGe

Hiroe Ukon, Masahide Miyachi, Tetsuro Ishii, Hiroshi Yamamoto, Kiyoshi Kawade and Toshio Katoh

Department of Nuclear Engineering, Nagoya University,
Furo-cho, Chikusa-ku, Nagoya 464-01, Japan

Yoichi Kawase and Kotoyuki Okano

Research Reactor Institute, Kyoto University,
Kumatori-cho, Osaka 590-04, Japan

Jian-Zhi Ruan

Department of Physics, Rikkyo University
Nishiikebukuro, Toshima-ku, Tokyo, Japan

Response functions of an HPGe detector to electrons ranging in kinetic energy from 0.91 to 4.45 MeV have been investigated by both experiments and Monte Carlo calculations. The β maximum energies of ^91-93Rb, ⁹⁴Y, ⁹⁵Sr, ^139-141Cs, ^142-145La, ^145,146Ce and ¹⁴⁶Pr obtained by using the On-line Isotope Separator KUR-ISOL were measured. It was found that Q_β-values could be determined with an accuracy of 20 keV.

KEYWORDS: HPGe detector, response functions, β-ray spectrometer, Monte Carlo calculation, Q_β