Chinese Physics C > 2001, Vol. 25 > Issue(5): 394-398

In-beam Measurement of β⁺Delay Particle Decay on RIBLL

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China2. Department of Technical Physics, Beijing University, Beijing 100871, China

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Abstract：
The in beam measurement of β ⁺delay α decay of ²⁰Na on the Radioactive Ion Beam Line in Lanzhou(RIBLL) is reported. The radioactive ion ²⁰Na was identified in beam by means of TOF-ΔE method. The implantation depth of the secondary beam in the detectors was optimized by a group of degraders with different thickness. The procedure of data acquisition was divided into two stages, i.e., in beam and off beam stage, to record the RIB and the β ⁺delay α particles respectively. Four resonant energy levels, 2.69, 3.09, 4.74, and 5.54MeV of ²⁰Ne, have been observed with their relative amplitudes of 100, 4.15, 1.10 and 15.2, respectively. The half life of ²⁰Na—→β ⁺ ²⁰Ne*→ ¹⁶O+α decay is preliminarily determined to be 459ms by using a time scaler combined with a pulse generator. The results are in good agreement with the ones of other group.

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XIAO Zhi-Gang, WANG Hong-Wei, WU He-Yu, LIU Yong-Ying, JIN Gen-Ming, ZHANG Bao-Guo, LI Zu-Yu, DUAN Li-Min, WEI Zhi-Yong, WANG Su-Fang, LU Zhao-Hui, HU Rong-Jiang, ZHU Hai-Dong, CEN Ling, CHEN Ke-Liang, LI Xiang-Qing, CHEN Tao and HUA Hui. In-beam Measurement of β ⁺Delay Particle Decay on RIBLL[J]. Chinese Physics C, 2001, 25(5): 394-398.

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Received: 2000-04-13
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

In-beam Measurement of β⁺Delay Particle Decay on RIBLL

Corresponding author:XIAO Zhi-Gang,

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China2. Department of Technical Physics, Beijing University, Beijing 100871, China

Received Date:2000-04-13
Accepted Date:1900-01-01
Available Online:2001-05-05

Abstract:The in beam measurement of β⁺delay α decay of²⁰Na on the Radioactive Ion Beam Line in Lanzhou(RIBLL) is reported. The radioactive ion²⁰Na was identified in beam by means of TOF-ΔE method. The implantation depth of the secondary beam in the detectors was optimized by a group of degraders with different thickness. The procedure of data acquisition was divided into two stages, i.e., in beam and off beam stage, to record the RIB and the β⁺delay α particles respectively. Four resonant energy levels, 2.69, 3.09, 4.74, and 5.54MeV of²⁰Ne, have been observed with their relative amplitudes of 100, 4.15, 1.10 and 15.2, respectively. The half life of²⁰Na—→β⁺²⁰Ne*→¹⁶O+α decay is preliminarily determined to be 459ms by using a time scaler combined with a pulse generator. The results are in good agreement with the ones of other group.