Measurement of the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>8</mn></mrow></msup></mrow><mi mathvariant="normal">Li</mi><mo>(</mo><mi>α</mi><mrow><msup><mrow><mo>,</mo><mi>n</mi><mo>)</mo></mrow><mrow><mn>11</mn></mrow></msup></mrow><mi mathvariant="normal">B</mi></math></span> reaction and astrophysical implications

Y. Mizoi; T. Fukuda; Y. Matsuyama; T. Miyachi; H. Miyatake; N. Aoi; N. Fukuda; M. Notani; Y. X. Watanabe; K. Yoneda; M. Ishihara; H. Sakurai; Y. Watanabe; A. Yoshida

doi:10.1103/PhysRevC.62.065801

Measurement of the $^{8} Li (α {, n)}^{11} B$ reaction and astrophysical implications

Y. Mizoi, T. Fukuda, Y. Matsuyama, T. Miyachi, H. Miyatake, N. Aoi, N. Fukuda, M. Notani, Y. X. Watanabe, K. Yoneda, M. Ishihara, H. Sakurai, Y. Watanabe, and A. Yoshida

Phys. Rev. C 62, 065801 – Published 2 November 2000

Abstract

We have measured the $^{8} Li (α {, n)}^{11} B$ reaction directly and exclusively, and determined the total cross sections in the center-of-mass energy of 1.5–7.0 MeV, by using a new-type gas counter, multiple-sampling and tracking proportional chamber (MSTPC), and neutron counters. This experiment was performed in the condition of inverse kinematics. The $^{8} Li$ beam was produced by the RIKEN projectile-fragment separator, and injected into the MSTPC filled with $^{4} He$ gas, which worked as a detector gas and served as a target. The reaction cross section obtained in the present exclusive measurement is about half of the one obtained in previous inclusive measurements.

Received 27 December 1999

DOI:https://doi.org/10.1103/PhysRevC.62.065801

Authors & Affiliations

Y. Mizoi^*, T. Fukuda, Y. Matsuyama, T. Miyachi^†, and H. Miyatake^‡

Institute for Nuclear Study (INS), The University of Tokyo, 3-2-1 Midori-chou, Tanashi, Tokyo 188-0002, Japan

N. Aoi, N. Fukuda, M. Notani^*, Y. X. Watanabe^*, and K. Yoneda

Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyou-ku, Tokyo 113-8654, Japan

M. Ishihara, H. Sakurai, Y. Watanabe, and A. Yoshida

The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan

^*Present address: The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako Saitama 351-0198, Japan.
^†Present address: The Japan Research Institute, Limited, 2-5 Ushijima-chou, Nishi-ku Nagoya 451-0046, Japan.
^‡Present address: High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba Ibaraki 305-0801, Japan.

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Vol. 62, Iss. 6 — December 2000

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