THE RADIATIVE NEUTRON CAPTURE ON ²H, ⁶Li, ⁷Li, ¹²C AND ¹³C AT ASTROPHYSICAL ENERGIES

Abstract

The continued interest in the study of radiative neutron capture on atomic nuclei is due, on the one hand, to the important role played by this process in the analysis of many fundamental properties of nuclei and nuclear reactions, and, on the other hand, to the wide use of the capture cross-section data in the various applications of nuclear physics and nuclear astrophysics, and, also, to the importance of the analysis of primordial nucleosynthesis in the Universe. This paper is devoted to the description of results for the processes of the radiative neutron capture on certain light atomic nuclei at thermal and astrophysical energies. The consideration of these processes is done within the framework of the potential cluster model (PCM), general description of which was given earlier. The methods of usage of the results obtained, based on the phase shift analysis intercluster potentials, are demonstrated in calculations of the radiative capture characteristics. The considered capture reactions are not part of stellar thermonuclear cycles, but involve in the basic reaction chain of primordial nucleosynthesis in the course of the Universe formation.

New measurements and phase shift analysis of p 16 O elastic scattering at astrophysical energies

“…These potentials, in turn, may further be used in calculations of various astrophysical problems, such as radiative capture of particles on light nuclei, and in this case, proton capture on 16 O. Some have already been considered and the results have been given, for example, in books [2,16] or reviews [5,[9][10][11][12][13].…”

Study of the nucleon radiative captures 8Li(n,γ)9Li, 9Be(p,γ)10B, 10Be(n,γ)11Be, 10B(p,γ)11C, and 16O(p,γ)17F at thermal and astrophysical energies

“…As usual, 37,38,42,[46][47][48][49][80][81][82] we use the potential of the Gaussian form with the point-like Coulomb term (2) in the capacity of the n 10 Be interaction in each partial wave with a given orbital angular moment L.…”

“…87 The total cross sections of the radiative capture (NJ,J f ) for the EJ-and M1-transitions in the potential cluster model are given elsewhere. 37,38,[46][47][48][49]58 For the neutron magnetic moment and 10 Be the following values were used:  n = -1.91304272µ 0 and ( 10 Be) = 0, 78 where µ 0 -nuclear magneton. The correctness of this expression for the М1 transition is pre-tested in our previous papers 37,38,42,80 on the basis of radiative neutron capture reaction on 7 Li and proton capture reaction on 2 Н at low and astrophysical energies.…”

RADIATIVE NEUTRON CAPTURE ON 9Be, 14C, 14N, 15N AND 16O AT THERMAL AND ASTROPHYSICAL ENERGIES

“…9(a) the results of measurements of the total crosssections, performed in the resonance region from 160 keV to 560 keV in Ref. 89. In Ref.…”