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Determination of asymptotic normalization coefficients for the channel 16 O→ α+12 C. II. Excited states 16 O(3− , 2+ , 1− )статья
- Авторы: Blokhintsev L.D., Kadyrov A.S., Mukhamedzhanov A.M., Savin D.A.
- Журнал: European Physical Journal A
- Том: 59
- Номер: 7
- Год издания: 2023
- Издательство: Springer Verlag
- Местоположение издательства: Germany
- Первая страница: 1
- Последняя страница: 8
- Номер статьи: 162
- DOI: 10.1140/epja/s10050-023-01079-4
- Аннотация: Asymptotic normalization coefficients (ANC) determine the overall normalization of cross sections of peripheral radiative capture reactions. In a recent paper [Blokhintsev et al., Eur. Phys. J. A 58, 257 (2022)], we con- sidered the ANC C0 for the virtual decay 16 O(0+ ; 6.05 MeV)→ α+12 C(g.s.). In the present paper, which can be regarded as a continuation of the previous, we treat the ANCs Cl for the vertices 16 O(J π ) → α+12 C(g.s.) corresponding to the other three bound excited states of 16 O (J π = 3− , 2+ , 1− , l = J ). ANCs Cl (l = 3, 2, 1) are found by analytic continuation in energy of the α 12 C l-wave partial scattering amplitudes, known from the phase-shift analysis of experimental data, to the pole corresponding to the 16 O bound state and lying in the unphysical region of negative energies. To determine Cl , the scattering data are approximated by the sum of polynomials in energy in the physical region and then extrapolated to the pole. For a more reliable determination of the ANCs, various forms of functions expressed in terms of phase shifts were used in analytical approximation and subsequent extrapola- tion.
- Добавил в систему: Савин Дмитрий Анатольевич