Astrophysical S factors of reactions with light nuclei

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].…”

“…This PCM takes into account forbidden states (FSs) [3,4] in intercluster potentials that we used in [5]. Finally, the possibility of describing the astrophysical S-factors or total cross sections for radiative capture of p 2 H, n 2 H, p 3 H, p 6 Li, n 6 Li, p 7 Li, n 7 Li, p 9 Be, n 9 Be, p 10 4 He 12 C systems at thermal and astrophysical energies was shown in [2,3,[5][6][7][8][9][10][11][12][13][14][15]. Calculations of these 27 processes were made on the basis of modified PCM variant with classification of states according to Young tableaux and forbidden, in some cases, states (MPCM), described in detail in [5,[9][10][11][12][13][14][15][16].…”

Effective two-body model for spectra of clusters of H2,H3,Fraser1, Massen-Hane2, Kadyrov3 et al. 2017Phys. Rev. C

“…by using three-or six-body approaches, it remains useful to investigate how much of the spectrum and cross section may be explained by a simpler two-body clusterization. A similar model phenomenological semi-microscopic model has been used recently to calculate phase shifts, for which a good match to data was obtained [1] as was the calculated S -factor for capture.…”

“…As noted by Dubovichenko and Uzikov [1], experimental studies of astrophysical nuclear * Electronic address: paul.fraser@curtin.edu.au reaction properties are complicated by the fact that the energies of most relevance are extremely low, frequently so low that direct measurement is nearly impossible. Thus, astrophysical quantities are often extrapolated from scattering data taken at higher energies, and such linear extrapolation is not always justified.…”

“…Dubovichenko and Uzikov [1] note that while there are many microscopic models of the continua of light mass nuclei, they usually entail cumbersome multichannel calculations, the accuracy of which cannot always be determined reliably. Consequently with the view to current or future assessments of astrophysical aspects of nuclear physics, the application of relatively simple, but realistic, models is justified.…”