Measurement of β<SUP>+</SUP> Delayed α Decay of <SUP>20</SUP>Na

WANG Hong-Wei; WU He-Yu; JIN Gen-Ming; ZHANG Bao-Guo; XIAO Zhi-Gang; DUAN Li-Min; WEI Zhi-Yong; LI Zu-Yu; LU Zhao-Hui; LIU Yong-Ying; CHEN Ke-Liang; HU Rong-Jiang; ZHU Hai-Dong; CEN Ling; WANG Su-Fang; LI Xiang-Qing; CHEN Tao; HUA Hui

Chinese Physics C> 2001, Vol. 25> Issue(8) : 731-735

Measurement of β⁺ Delayed α Decay of ²⁰Na

Institute of Modern Physics,The Chinese Academy of Sciences,Lanzhou 730000,China1 Department of Technical Physics,Peking University,Beijing 100871,China

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Abstract：
Through the ²⁰Na β⁺ ²⁰Ne→¹⁶O+α process,the half-life and β⁺ delayed α decay spectrum of ²⁰Na have been measured on the Radioactive Ion Beam Line in Lanzhou(RIBLL). The ²⁰Na was identified through TOF-ΔE method and alpha particle was measured by four Si(Au) surface barrier detectors. The half life of ²⁰ Na is(459±7)ms. Result shows that in addition to nine high excitation energy levels with E_d≥2.688MeV, three low excitation energy levels of ²⁰Na with E_d=0.890 & 1.054,1.991,2.424 & 2.457MeV were observed in the experiment. The relative intensity for 1.991MeV level, a more important energy level in the center of mass system energy region from 1.6 to 2.5MeV obtained in this experiment is much higher than the existed one. We also obtained the relative intensities of the levels of E_d=0.890 & 1.054,2.424 & 2.457MeV.

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WANG Hong-Wei, WU He-Yu, JIN Gen-Ming, ZHANG Bao-Guo, XIAO Zhi-Gang, DUAN Li-Min, WEI Zhi-Yong, LI Zu-Yu, LU Zhao-Hui, LIU Yong-Ying, CHEN Ke-Liang, HU Rong-Jiang, ZHU Hai-Dong, CEN Ling, WANG Su-Fang, LI Xiang-Qing, CHEN Tao and HUA Hui. Measurement of β⁺ Delayed α Decay of ²⁰Na[J]. Chinese Physics C, 2001, 25(8): 731-735.

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Received: 2000-08-24
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Measurement of β⁺ Delayed α Decay of ²⁰Na

Corresponding author: WANG Hong-Wei,

Institute of Modern Physics,The Chinese Academy of Sciences,Lanzhou 730000,China1 Department of Technical Physics,Peking University,Beijing 100871,China

Received Date: 2000-08-24

Accepted Date: 1900-01-01

Available Online: 2001-08-05

Abstract: Through the ²⁰Na β⁺ ²⁰Ne→¹⁶O+α process,the half-life and β⁺ delayed α decay spectrum of ²⁰Na have been measured on the Radioactive Ion Beam Line in Lanzhou(RIBLL). The ²⁰Na was identified through TOF-ΔE method and alpha particle was measured by four Si(Au) surface barrier detectors. The half life of ²⁰ Na is(459±7)ms. Result shows that in addition to nine high excitation energy levels with E_d≥2.688MeV, three low excitation energy levels of ²⁰Na with E_d=0.890 & 1.054,1.991,2.424 & 2.457MeV were observed in the experiment. The relative intensity for 1.991MeV level, a more important energy level in the center of mass system energy region from 1.6 to 2.5MeV obtained in this experiment is much higher than the existed one. We also obtained the relative intensities of the levels of E_d=0.890 & 1.054,2.424 & 2.457MeV.

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Measurement of β⁺ Delayed α Decay of ²⁰Na

Measurement of β⁺ Delayed α Decay of ²⁰Na