Neutron Single Particle Structure inSn131and Direct Neutron Capture Cross Sections

Autor:	Robert Hatarik, Goran Arbanas, W. Królas, K. Y. Chae, Dan Shapira, Zhanwen Ma, D. W. Bardayan, Jolie Cizewski, K. L. Jones, Catalin Matei, S. D. Pain, T. P. Swan, Michael Scott Smith, Caroline D Nesaraja, Jeffery C. Blackmon, Brian Moazen, William Raphael Hix, Aderemi S. Adekola, J. F. Shriner, R. L. Kozub, J. F. Liang, Kelly Chipps, L. Erikson
Rok vydání:	2012
Předmět:	Nuclear physics Reaction rate Physics Neutron capture Orders of magnitude (time) Nucleosynthesis Bound state Neutron cross section General Physics and Astronomy r-process Neutron Atomic physics Nuclear Experiment
Zdroj:	Physical Review Letters. 109
ISSN:	1079-7114 0031-9007
Popis:	Recent calculations suggest that the rate of neutron capture by 130Sn has a significant impact on late-time nucleosynthesis in the r-process. Direct capture into low-lying bound states is expected to be significant in neutron capture near the N=82 closed shell, so r- process reaction rates may be strongly impacted by the properties of neutron single particle states in this region. In order to investigate these properties, the (d, p) reaction has been studied in inverse kinematics using a 630 MeV beam of 130Sn (4.8 MeV/u) and a (CD2)n target. An array of Si strip detectors, including SIDAR and an early implementation of the ORRUBA, was used to detect reaction products. Results for the 130Sn(d, p)131Sn reaction are found to be very similar to those from the previously reported 132Sn(d, p)133Sn reaction. Direct-semidirect (n, ) cross section calculations, based for the first time on experimental data, are presented. The uncertainties in these cross sections are thus reduced by orders of magnitude from previous estimates.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::542af768e12fc93c777281575366f9ea https://doi.org/10.1103/physrevlett.109.172501 Zobrazit plný text záznamu