TY - JOUR
T1 - Study of the contribution of the 7Be(d, p) reaction to the 7Li problem in the Big-Bang Nucleosynthesis
AU - Inoue, Azusa
AU - Tamii, Atsushi
AU - Chan, Phaikying
AU - Hayakawa, Seiya
AU - Kobayashi, Nobuyuki
AU - Maeda, Yukie
AU - Nonaka, Kotaro
AU - Shima, Tatsushi
AU - Shimizu, Hideki
AU - Tran, Dinh Trong
AU - Wang, Xuan
AU - Yamaguchi, Hidetoshi
AU - Yang, Lei
AU - Yang, Zaihong
N1 - Funding Information:
A.I. thanks D. Kahl for useful discussions. This work was supported by JSPS KAKENHI Grant Number JP 16H03980.
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2020/12/23
Y1 - 2020/12/23
N2 - Our research goal is to measure the cross section of the 7Be(d, p) reaction to find a solution for the cosmological the 7Li problem, which is an overestimation of the primordial 7Li abundance in the standard Big-Bang nucleosynthesis (BBN) model. We developed a method to produce an unstable 7Be target to measure the reaction in normal kinematics in a high-resolution measurement. We performed an experiment to produce the 7Be target and also to measure the cross section of the 7Be(d, p)8Be reaction with the produced 7Be target at the tandem facility, Kobe University. A 2.36 MeV proton beam irradiated a Li target to transmute 7Li particles to 7Be particles via the 7Li(p, n)7Be reaction. We produced 2.6 1013 7Be particles in the target after two days' proton irradiation. After the target production, the beam ion was changed to deuterons with energies of 0.6, 1.0, and 1.6 MeV to measure the 7Be(d, p) reaction. The outgoing protons were measured by two ΔE-E silicon telescopes placed at 30 and 45 . We report the preliminary results of this experiment, including the 7Be(d, p) cross section.
AB - Our research goal is to measure the cross section of the 7Be(d, p) reaction to find a solution for the cosmological the 7Li problem, which is an overestimation of the primordial 7Li abundance in the standard Big-Bang nucleosynthesis (BBN) model. We developed a method to produce an unstable 7Be target to measure the reaction in normal kinematics in a high-resolution measurement. We performed an experiment to produce the 7Be target and also to measure the cross section of the 7Be(d, p)8Be reaction with the produced 7Be target at the tandem facility, Kobe University. A 2.36 MeV proton beam irradiated a Li target to transmute 7Li particles to 7Be particles via the 7Li(p, n)7Be reaction. We produced 2.6 1013 7Be particles in the target after two days' proton irradiation. After the target production, the beam ion was changed to deuterons with energies of 0.6, 1.0, and 1.6 MeV to measure the 7Be(d, p) reaction. The outgoing protons were measured by two ΔE-E silicon telescopes placed at 30 and 45 . We report the preliminary results of this experiment, including the 7Be(d, p) cross section.
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U2 - 10.1088/1742-6596/1643/1/012049
DO - 10.1088/1742-6596/1643/1/012049
M3 - Conference article
AN - SCOPUS:85098485043
SN - 1742-6588
VL - 1643
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012049
T2 - 27th International Nuclear Physics Conference, INPC 2019
Y2 - 29 July 2019 through 2 August 2019
ER -