Cross Section of theC12(p,γ)N13Reaction at Low Energies

Abstract

The efficiency of the nuclear reaction C n (p, y)W 3 has been measured over the energy range from 125 kev to 200 kev, with results which are in good agreement with those recently published by Hall and Fowler. The cross section ranges from 1.0X10 -33 cm 2 at 128 kev to 23X10 -33 cm 2 at 194 kev. The thick-target yield of the reaction was measured, by detecting the N 13 positron activity with an absolutely calibrated counter, and the cross sections were obtained by differentiation of the thick-target yield curve.

Frontiers in nuclear astrophysics

“…The reactions in this cycle are relatively well-known experimentally. The 12 C( p,γ) 13 N reaction has been studied over a wide energy range down to 70 keV [338,339,340,233,342,343,344,345,346,347,348]. The S-factor at 25 keV is found to be (1.75 ± 0.22) keV.b [348].…”

New measurements of the astrophysicalSfactor for12C(p,γ)Burtebaev1, Igamov2, Peterson3 et al. 2008Phys. Rev. C414300View full textAdd to dashboardCite

“…[20] the direct capture amplitude containing both the resonance phase shifts and the nonresonance phase shifts calculated for the Woods-Saxon (or square) potential at fixed geometrical parameters is factorized in terms of the spectroscopic factor Z p 12 (E) given by Eqs. (9)-(11) are determined by means of values of the ANC C p 12 C;l b and the nonresonance hard-sphere phase shifts for p 12 C scattering.…”

“…Both of the excited resonance states decay partially by γ emission to the ground state of 13 N. Early experimental data for the 12 C(p, γ ) 13 N cross sections at rather low energies have been obtained in Refs. [12][13][14][15][16][17][18][19]. In Refs.…”

Measurement and analysis techniques for a study of 12C(p,γ) and 13C(p,γ) deep underground

“…However, the S -factor is not properly constrained by the data reported below 200 keV. Results by [10] and [11] poorly overlap and are affected by high uncertainties, up to 20% and 41% respectively.…”