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15C-15F Charge symmetry and the 14C(n,gamma)15C reaction puzzle.

Timofeyuk, NK, Baye, D, Descouvemont, P, Kamouni, R and Thompson, IJ (2006) 15C-15F Charge symmetry and the 14C(n,gamma)15C reaction puzzle. Phys Rev Lett, 96 (16).

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The low-energy reaction 14C(n,gamma)15C provides a rare opportunity to test indirect methods for the determination of neutron capture cross sections by radioactive isotopes versus direct measurements. It is also important for various astrophysical scenarios. Currently, puzzling disagreements exist between the 14C(n,gamma)15C cross sections measured directly, determined indirectly, and calculated theoretically. To solve this puzzle, we offer a strong test based on a novel idea that the amplitudes for the virtual 15C-->14C + n and the real 15F -->14O + p decays are related. Our study of this relation, performed in a microscopic model, shows that existing direct and some indirect measurements strongly contradict charge symmetry in the 15C and 15F mirror pair. This brings into question the experimental determinations of the astrophysically important (n,gamma) cross sections for short-lived radioactive targets.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
Timofeyuk, NK
Baye, D
Descouvemont, P
Kamouni, R
Thompson, IJ
Date : 28 April 2006
DOI : 10.1103/PhysRevLett.96.162501
Related URLs :
Additional Information : © 2006 The American Physical Society
Depositing User : Symplectic Elements
Date Deposited : 26 Nov 2013 10:09
Last Modified : 31 Oct 2017 16:28

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