First experimental constraint of the spectroscopic amplitudes for the α-cluster in the 11B ground state

Y.P. Shen; B. Guo; T.L. Ma; D.Y. Pang; D.D. Ni; Z.Z. Ren; Y.J. Li; Z.D. An; J. Su; J.C. Liu; Q.W. Fan; Z.Y. Han; X.Y. Li; Z.H. Li; G. Lian; Y. Su; Y.B. Wang; S.Q. Yan; S. Zeng; W.P. Liu

Physics Letters B (Oct 2019)

First experimental constraint of the spectroscopic amplitudes for the α-cluster in the 11B ground state

Y.P. Shen,
B. Guo,
T.L. Ma,
D.Y. Pang,
D.D. Ni,
Z.Z. Ren,
Y.J. Li,
Z.D. An,
J. Su,
J.C. Liu,
Q.W. Fan,
Z.Y. Han,
X.Y. Li,
Z.H. Li,
G. Lian,
Y. Su,
Y.B. Wang,
S.Q. Yan,
S. Zeng,
W.P. Liu

Affiliations

Y.P. Shen: China Institute of Atomic Energy, P. O. Box 275(10), Beijing 102413, China
B. Guo: China Institute of Atomic Energy, P. O. Box 275(10), Beijing 102413, China; Corresponding author.
T.L. Ma: China Institute of Atomic Energy, P. O. Box 275(10), Beijing 102413, China
D.Y. Pang: School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China; Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing 100191, China
D.D. Ni: Space Science Institute, Macao University of Science and Technology, Macao, China
Z.Z. Ren: School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
Y.J. Li: China Institute of Atomic Energy, P. O. Box 275(10), Beijing 102413, China
Z.D. An: School of Physics and Astronomy, Sun Yat-Sen University, Zhuhai 519082, China
J. Su: China Institute of Atomic Energy, P. O. Box 275(10), Beijing 102413, China
J.C. Liu: China Institute of Atomic Energy, P. O. Box 275(10), Beijing 102413, China
Q.W. Fan: China Institute of Atomic Energy, P. O. Box 275(10), Beijing 102413, China
Z.Y. Han: China Institute of Atomic Energy, P. O. Box 275(10), Beijing 102413, China
X.Y. Li: China Institute of Atomic Energy, P. O. Box 275(10), Beijing 102413, China
Z.H. Li: China Institute of Atomic Energy, P. O. Box 275(10), Beijing 102413, China
G. Lian: China Institute of Atomic Energy, P. O. Box 275(10), Beijing 102413, China
Y. Su: China Institute of Atomic Energy, P. O. Box 275(10), Beijing 102413, China
Y.B. Wang: China Institute of Atomic Energy, P. O. Box 275(10), Beijing 102413, China
S.Q. Yan: China Institute of Atomic Energy, P. O. Box 275(10), Beijing 102413, China
S. Zeng: China Institute of Atomic Energy, P. O. Box 275(10), Beijing 102413, China
W.P. Liu: China Institute of Atomic Energy, P. O. Box 275(10), Beijing 102413, China

Journal volume & issue: Vol. 797

Abstract

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We present the first experimental determination on the spectroscopic amplitudes (SAs) for the α-cluster in the B11 ground state via the Li7(Li6,d)11B reaction using a high-precision magnetic spectrograph. This is believed to have a strong effect on the studies of α-induced reactions which are crucial in nuclear astrophysics. It is found that the previous SAs of B11 from shell model calculations cause overestimations of up to 23% for the C12(α,γ)16O SE2(300) factor and up to 34% for the C13(α,n)16O S(190) factor with respect to the results from the present experimentally determined SAs. Due to the importance of these two reactions, for example the uncertainty in the C12(α,γ)16O cross section at Ec.m. = 300 keV is required to be better than 10% by stellar modeling, the new S-factors could result in a potential influence on the astrophysical network calculations.

Published in Physics Letters B

ISSN: 0370-2693 (Print); 1873-2445 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/physics-letters-b/

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