Thermonuclear Cr-46(p,gamma)Mn-47 rate in type-I x-ray bursts

0479679 - ÚJF 2018 RIV US eng J - Článek v odborném periodiku
He, J. J. - Parikh, A. - Xu, Yi - Zhang, Y. H. - Zhou, X. H. - Xu, H. S.
Thermonuclear Cr-46(p,gamma)Mn-47 rate in type-I x-ray bursts.
Physical Review C. Roč. 96, č. 4 (2017), č. článku 045801. ISSN 2469-9985. E-ISSN 2469-9993
Institucionální podpora: RVO:61389005
Klíčová slova: atomic mass evaluation * Mn-47
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 3.304, rok: 2017

The thermonuclear rate of the Cr-46(p,gamma)(47) Mn reaction has been determined using a newly evaluated proton separation energy of S-p(Mn-47) = 380 +/- 30 keV and nuclear structure information from the mirror nucleus 47Ti. The astrophysical impact of this new rate and previously available rates has been investigated through one- zone postprocessing type-I x-ray burst calculations. The present Cr-46(p,gamma)(47) Mn rate leads to a mass fraction at A = 46 that is 60 times larger than that obtained using a statistical model rate. The new results constrain the calculated maximum and minimum mass fractions at A = 46 and A = 48 to be within factors of 12 and 4, respectively. Experimental studies of the level structure of Mn-47 near the proton threshold are required to improve these model predictions.
Trvalý link: http://hdl.handle.net/11104/0275644