Astrophysical S factor for the radiative capture N-12(p,gamma)O-13 determined from the N-14(N-12,O-13)C-13 proton transfer reaction

0324260 - ÚJF 2009 RIV US eng J - Journal Article
Banu, A. - Al-Abdullah, T. - Fu, C. - Gagliardi, C. A. - McCleskey, M. - Mukhamedzhanov, A. M. - Tabacaru, G. - Trache, L. - Tribble, R. E. - Zhai, Y. - Carstoiu, F. - Burjan, Václav - Kroha, Václav
Astrophysical S factor for the radiative capture N-12(p,gamma)O-13 determined from the N-14(N-12,O-13)C-13 proton transfer reaction.
[Astrofyzikální S faktor radiačního záchytu 12N(p, γ )13O určený z reakce přenosu protonu 14N(12N, 13O)13C.]
Physical Review. C. Roč. 79, č. 2 (2009), 025805/1-025805/10. ISSN 0556-2813
Institutional research plan: CEZ:AV0Z10480505
Keywords : ASYMPTOTIC NORMALIZATION COEFFICIENTS * COUPLED-CHANNELS CALCULATIONS * OPTICAL-MODEL
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 3.477, year: 2009

The cross section of the radiative proton capture reaction on the drip line nucleus N-12 was investigated using the asymptotic normalization coefficient (ANC) method. We have used the N-14(N-12,O-13)C-13 proton transfer reaction at 12 MeV/nucleon to extract the ANC for O-13 -> N-12+p and calculate from it the direct component of the astrophysical S factor of the N-12(p,gamma)O-13 reaction. The optical potentials used and the distorted-wave Born approximation analysis of the proton transfer reaction are discussed. For the entrance channel, the optical potential was inferred from an elastic scattering measurement carried out at the same time as the transfer measurement. From the transfer, we determined the square of the ANC, C-p1/2(2)(O-13(g.s.))=2.53 +/- 0.30 fm(-1), and hence a value of 0.33(4) keV b was obtained for the direct astrophysical S factor at zero energy.

Metodou asymptotických normalizačních koeficientů byl určen astrofyzikální S-faktor radiačního záchytu 12N(p, γ )13O při nulové energii. Pro přímý proces byla vyvozena hodnota S(0) ( 13Og.s.) = 0.33(4) keVb, která vede v důsledku interference přímého procesu s rezonančním záchytem ke zvýšení celkového astrofyzikálního faktoru na hodnotu S(0) = 0.42(6) keVb.
Permanent Link: http://hdl.handle.net/11104/0172007