Low-energy enhancement of nuclear γ strength and its impact on astrophysical reaction rates

A. C. Larsen; N. Blasi; A. Bracco; A. Bürger; F. Camera; T.K. Eriksen; F. Giacoppo; S. Goriely; M. Guttormsen; A. Görgen; T. W. Hagen; S. Harissopulos; P. E. Koehler; S. Leoni; B. Million; H.T. Nyhus; T.T. Renstrøm; S. Rose; I.E. Ruud; A. Schiller; S. Siem; T. Tornyi; G. M. Tveten; A. V. Voinov; M. Wiedeking

doi:10.1051/epjconf/20146607014

All issues

Volume 66 (2014)

EPJ Web of Conferences, 66 (2014) 07014

Abstract

Open Access

Issue		EPJ Web of Conferences Volume 66, 2014 INPC 2013 – International Nuclear Physics Conference


Article Number		07014
Number of page(s)		4
Section		Nuclear Astrophysics
DOI		https://doi.org/10.1051/epjconf/20146607014
Published online		20 March 2014

EPJ Web of Conferences 66, 07014 (2014)
https://doi.org/10.1051/epjconf/20146607014

Low-energy enhancement of nuclear γ strength and its impact on astrophysical reaction rates

A. C. Larsen¹^a, N. Blasi², A. Bracco²^,3, A. Bürger²^,1, F. Camera²^,3, T.K. Eriksen¹, F. Giacoppo¹, S. Goriely⁴, M. Guttormsen¹, A. Görgen¹, T. W. Hagen¹, S. Harissopulos⁵, P. E. Koehler¹, S. Leoni²^,3, B. Million², H.T. Nyhus¹, T.T. Renstrøm¹, S. Rose¹, I.E. Ruud¹, A. Schiller⁶, S. Siem¹, T. Tornyi¹^,7, G. M. Tveten¹, A. V. Voinov⁸ and M. Wiedeking⁹

¹ Department of Physics, University of Oslo, N-0316 Oslo, Norway
² INFN, Sezione di Milano, Milano, Italy
³ Dipartimento di Fisica, University of Milano, Milano, Italy
⁴ Institut d’Astronomie et d’Astrophysique, ULB, Belgium
⁵ Institute of Nuclear Physics, NCSR ”Demokritos”, Athens, Greece
⁶ Norwegian Defence Research Establishment, N-2007 Kjeller, Norway
⁷ Institute of Nuclear Research, MTA ATOMKI, H-4026 Debrecen, Hungary
⁸ Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA
⁹ iThemba LABS, P.O. Box 722, 7129 Somerset West, South Africa

^a e-mail: a.c.larsen@fys.uio.no

Published online: 20 March 2014

Abstract

An unexpected enhancement in the low-energy part of the γ-strength function for light and medium-mass nuclei has been discovered at the Oslo Cyclotron Laboratory. This enhancement could lead to an increase in the neutron-capture rates up to two orders of magnitude for very exotic, neutron-rich nuclei. However, it is still an open question whether this structure persists when approaching the neutron drip line.

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