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Asymptotic normalization coefficients of resonant and bound states from the phase shifts for αα and α 12C scatteringстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 10 февраля 2016 г.
- Авторы: Orlov Yu V., Irgaziev B.F., Nikitina L.I.
- Журнал: Physical Review C
- Том: 93
- Год издания: 2016
- Издательство: American Physical Society
- Местоположение издательства: College Park, MD
- Первая страница: 014612-1
- Последняя страница: 014612-7
- DOI: 10.1103/PhysRevC.93.014612
- Аннотация: Recently we have published a paper [Irgaziev B.F., and Orlov Yu.V., Phys. Rev. C 91, 024002 (2015)] where the S-matrix pole method (SMP), which is only valid for resonances, has been developed to derive an explicit expression for the asymptotic normalization coefficient (ANC) and is applied to the low-energy resonant states of nucleon + α and α + 12C systems. The SMP results are compared with the effective-range expansion method (EFE) results. In the present paper the SMP and EFE plus the Pade´ approximation are applied to study the excited 2+ resonant states of 8Be. A contradiction is found between descriptions of the experimental phase shift data for αα scattering and of the 8Be resonant energy for 2+ state. Using the EFE method, we also calculate the ANC for the 8Be ground 0+ state with a very small width. This ANC agrees well with the value calculated using the known analytical expression for narrow resonances. In addition, for the α + 12C states 1− and 3− the SMP results are compared with the Pade´ approximation results. We find that the Pade´ approximation improves a resonance width description compared with the EFE results. The EFE method is also used to calculate the ANCs for the bound 16O ground 0+ state and for the excited 1− and 2+ levels, which are situated near the threshold of α + 12C channel.
- Добавил в систему: Орлов Юрий Всеволодович