AstrophysicalS17(0) factor from a measurement of theH2(

J. J. Das

¹

,

V. M. Datar

²

,

P. Sugathan

³

et al.

Abstract

Astrophysical S 17 (0) factor from a measurement of d( A beam stopper at 0 • allowed the use of a higher 7 Be beam intensity. Measurement of the elastic scattering in the entrance channel using kinematic coincidence, facilitated the determination of the optical model parameters needed for the analysis of the transfer data. The present measurement significantly reduces errors in the extracted 7 Be(p,γ) cross section using the ANC method. We get S 17 (0) = 20.7 ± 2.4 eV b.PACS numbers: 25.60. Je, 25.60.Bx, 26.20.+F, 26.65.+t

Determination of the8B(p,γ)9C reactio

“…The asymptotic normalization coefficient (ANC) method [8], which is one of the most important techniques of indirect measurements, has been used in several studies [7,[9][10][11][12][13][14][15] in order to determine astrophysical reaction rates. The basic idea of the ANC method is that only the tail of the overlap between the initial and final states contributes to a reaction at stellar energies.…”

“…One of the most important conditions for the ANC method is that a reaction used to determine the ANC must be peripheral. From this aspect, transfer reactions at low incident energies [9][10][11][12][13][14] and nucleon-removal reactions in wide range of energies [15] have been used as alternative reactions for the ANC method. In Ref.…”

Determination of the astrophysical12N(p,γ)13Su1, Li2, Wang3 et al. 2013Phys. Rev. C13010View full textAdd to dashboardCite

“…In 1989, Wiescher, Görres, Graff et al [5] suggested the rap processes as alternative paths which would permit these stars to bypass the 3α process and to yield the CNO material. The reactions involved in the rap-processes are listed as below: rap-I : 3 He(α, γ ) 7 Be(p, γ ) 8 B(p, γ ) 9 C(α, p) 12 N(p, γ ) 13 O(β + ν) 13 N(p, γ ) 14 O, rap-II : 3 He(α, γ ) 7 Be(α, γ ) 11 C(p, γ ) 12 N(p, γ ) 13 O(β + ν) 13 N(p, γ ) 14 O, rap-III : 3 He(α, γ ) 7 Be(α, γ ) 11 C(p, γ ) 12 N(β + ν) 12 C(p, γ ) 13 N(p, γ ) 14 O, rap-IV : 3 He(α, γ ) 7 Be(α, γ ) 11 C(α, p) 14 N(p, γ ) 15 O.…”

“…12 N(p, γ ) 13 O is an important reaction in the rap-I and rap-II processes. Due to the low Q value (1.516 MeV) of the 12 N(p, γ ) 13 O reaction, its stellar reaction rate is dominated by the direct capture into the ground state in 13 O.…”

“…12 N(p, γ ) 13 O is an important reaction in the rap-I and rap-II processes. Due to the low Q value (1.516 MeV) of the 12 N(p, γ ) 13 O reaction, its stellar reaction rate is dominated by the direct capture into the ground state in 13 O. In addition, the resonant capture via the first excited state in 13 O could play an important role for determining the reaction rates.…”