Статья

A drop in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Li</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:mmultiscripts><mml:mo stretchy="false">(</mml:mo><mml:mi>p</mml:mi><mml:mo>,</mml:mo><mml:mi>γ</mml:mi><mml:mo stretchy="false">)</mml:mo><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Be</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>7</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>reaction at low energies

J. J. HeInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaSize ChenInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaC. RolfsFakultät für Physik und Astronomie, Ruhr-Universität Bochum, Bochum 44780, GermanyShutao XuInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaJun HuInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaX. MaInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaM. WiescherDepartment of Physics, University of Notre Dame, Notre Dame, IN 46556, USAR. J. deBoerDepartment of Physics, University of Notre Dame, Notre Dame, IN 46556, USAToshitaka KajinoDepartment of Astronomy, Graduate School of Science, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, JapanMotohiko KusakabeInstitute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, JapanLingling ZhangInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaS. Q. HouInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaXiaohan YuInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaN.T. ZhangInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaGang LianChina Institute of Atomic Energy, P.O. Box 275(1), Beijing 102413, ChinaY.H. ZhangInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaXin‐Hui ZhouInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaX. XuInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaGuoqing XiaoInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaWenlong ZhanInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

2013lv

ABI

Аннотация

The low-energy astrophysical S factors of the Li6(p,γ)Be7 reaction have been investigated on a 320 kV platform at the Institute of Modern Physics in Lanzhou. The experimental S factor of this reaction shows an interesting sizable drop contrary to any existing theoretical expectations at energies below 200 keV. Such drop has not been fully understood yet and may reflect a novel reaction mechanism. The appearance of an interesting new positive-parity 1/2+ or 3/2+ resonance at Ec.m.≈195keV is discussed. This study shows the danger of extrapolating experimental data over too large an energy range and demonstrates the need for careful direct experimental studies of reaction cross sections at or near stellar energies. In addition, our new results are discussed in the framework of a SUSY assisted Big-Bang Nucleosynthesis (BBN) model.

Перевод пока недоступен

Идентификаторы

DOI: 10.1016/j.physletb.2013.07.044

Цитирования и источники

Цитирований: 4Использованных источников: 0

Показатели — AkademScholar