Two measurements of the 22Na+p resonant scattering via thick-target inverse-kinematics method
1 China Institute of Atomic Energy, Beijing 102413, China
2 Center for Nuclear Study(CNS), University of Tokyo, Saitama 351-0198, Japan
3 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
4 Chung-Ang University, Seoul 156-756, Republic of Korea
5 Kyushu University, Fukuoka 812-8581, Japan
6 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
7 High Energy Accelerator Research Organization(KEK), Ibaraki 305-0801, Japan
8 Tohoku University, Miyagi 980-8578, Japan
9 University of Tsukuba, Ibaraki 305-8571, Japan
10 Michigan State University, East Lansing, Michigan 48824-1321, USA
a e-mail: email@example.com
Published online: 12 February 2016
22Na is an important isotope for the study of extinct radioactivity, meanwhile its sufficiently long half life provides the possibility to observe live 22Na in nearby nova explosions. The 22Na(p,γ) 23Mg is one of the key reactions that influence the 22Na abundance in nova ejecta. To study the proton resonant states in 23Mg relevant to the astrophysical 22Na(p,γ) 23Mg reaction rates, two measurements have been carried out at the CRIB separator of University of Tokyo, and the RIBLL secondary beamline in Lanzhou, respectively. The 22Na secondary beam was produced via the 1H(22Ne, 22Na)n charge exchange reaction. Thick-target inverse-kinematics method is applied to obtain the excitation function of 22Na+p elastic scattering. Extended gas target and solid state polyethylene foil were used in the two measurements, respectively, to map the different excitation energy region of the compound nucleus 23Mg. Several new resonant levels are observed and their contribution to the 22Na(p,γ) 23Mg reaction rate is evaluated.
© Owned by the authors, published by EDP Sciences, 2016
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