Journal Article

PreJuSER-54962

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Measurement of the 2H(n,gamma)3H reaction cross section between 10 and 550 keV

Nagai, Y. ; Kobayashi, T. ; Shima, T. ; Kikuchi, T. ; Takaoka, K. ; Igashira, M. ; Golak, J. ; Skibinski, R. ; Witala, H. ; Nogga, A.FZJ* ; Glöckle, W. ; Kamada, H.

2006
Inst. Woodbury, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/11109  doi:10.1103/PhysRevC.74.025804

Abstract: We have measured for the first time the cross section of the H-2(n,gamma)H-3 reaction at an energy relevant to big-bang nucleosynthesis by employing a prompt discrete gamma-ray detection method. The outgoing photons have been detected by means of anti-Compton NaI(Tl) spectrometers with a large signal-to-noise ratio. The resulting cross sections are 2.23 +/- 0.34,1.99 +/- 0.25, and 3.76 +/- 0.41 mu b at E-n=30.5,54.2, and 531 keV, respectively. At E-n=30.5 keV the cross section differs from the value reported previously by a factor of 2. Based on the present data the reaction rate has been obtained for temperatures in the range 10(7)-10(10) K. The astrophysical impact of the present result is discussed. The obtained cross sections are compared with a theoretical calculation based on the Faddeev approach, which includes meson exchange currents as well as a three-nucleon force.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Research Program(s):

1. Physik der Hadronen und Kerne (P53)

Appears in the scientific report 2006

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