Measurement of the 2H(n,γ)3H reaction cross section between 10 and 550 keV

Nagai, Y, Shima, T, Kobayashi, T, Takaoka, K, Igashira, M, Kikuchi, T, Golak, J, Skibinski, R, Kamada, Hiroyuki, Glockle, W, Witala, H, Nogga, A

doi:10.1103/physrevc.74.025804

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Other Title

Measurement of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">H</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:mmultiscripts></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mi>n</mml:mi><mml:mo>,</mml:mo><mml:mi>γ</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">H</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>reaction cross section between 10 and 550 keV

Published: 2006-08-14

Resource Type: journal article

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DOI

10.1103/physrevc.74.025804

Publisher: American Physical Society

Description

We have measured for the first time the cross section of the 2H(n,γ)3H reaction at an energy relevant to big-bang nucleosynthesis by employing a prompt discrete -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±0.41µb at En=30.5,54.2, and 531 keV, respectively. At En=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 107-1010 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.

Journal

Physical Review. Third series. C, Nuclear physics

Physical Review. Third series. C, Nuclear physics 74 (025804), 025804-1-025804-7, 2006-08-14

American Physical Society

Details 詳細情報について

CRID: 1050001338909734912

NII Article ID: 120002440839

NII Book ID: AA00773613

DOI: 10.1103/physrevc.74.025804

ISSN: 1089490X; 05562813

HANDLE: 10228/663

Web Site: https://kyutech.repo.nii.ac.jp/records/416

Text Lang: en

Article Type: journal article

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