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

This title appears in the Scientific Report : 2006

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

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 signa...

Personal Name(s):	Nagai, Y.
	Kobayashi, T. / Shima, T. / Kikuchi, T. / Takaoka, K. / Igashira, M. / Golak, J. / Skibinski, R. / Witala, H. / Nogga, A. / Glöckle, W. / Kamada, H.
Contributing Institute:	Institut 3 (Theoretische Kernphysik); IKP-TH
Published in:	Physical Review C Physical review / C, 74 74 (2006 2006) 2 2, S. 025804 025804
Imprint:	Woodbury, NY Inst. 2006 2006-08-14 2006-08-01
Physical Description:	025804
DOI:	10.1103/PhysRevC.74.025804
Document Type:	Journal Article
Research Program:	Physik der Hadronen und Kerne
Series Title:	Physical Review C 74
Subject (ZB):	J
Link:	Get full text OpenAccess OpenAccess
	Publikationsportal JuSER

Please use the identifier: http://hdl.handle.net/2128/11109 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevC.74.025804 in citations.

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.