The Investigation of the <SUP>8</SUP>Li(α, <i>n</i>)<SUP>11</SUP>B Cross Section at Low Energy by a Distorted Wave Born Approximation Model
PHYSICS OF PARTICLES AND NUCLEI LETTERS, cilt.20, sa.6, ss.1335-1341, 2023 (ESCI, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 20 Sayı: 6
- Basım Tarihi: 2023
- Doi Numarası: 10.1134/s1547477123060183
- Dergi Adı: PHYSICS OF PARTICLES AND NUCLEI LETTERS
- Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), Scopus
- Sayfa Sayıları: ss.1335-1341
- Eskişehir Osmangazi Üniversitesi Adresli: Evet
Özet
The investigation of the cross section of the Li-8(alpha, n)B-11 reaction has vital importance for both primordial nucleosynthesis in inhomogeneous models and constraining the physical conditions characterizing the r-process. In order to understand the reaction mechanism at low energies, we have applied the Distorted Wave Born Approximation (DWBA) theory below 2 MeV to determine direct reaction contribution. The total cross section has been calculated for the transitions of excited states to Li-8(alpha, n)B-11. Spectroscopic factor strengths for Li-8(alpha, n)B-11 have been calculated within the framework of the shell model. Furthermore, the existing experimental measurements concerning the reaction in question at Big Bang zone and r-process region were analyzed using Wentzel, Kramers and Brilloin method (WKB) and distorted wave born approximation methods respectively. However, both resonance-like structures of B-12 at low energies and unclear nuclear structure of Li-8 strongly influence total cross section in the Big Bang and r-process zones. It is apparent that reaction mechanism of Li-8(alpha, n)B-11 is out of the scope DWBA and WKB. Furthermore, in order to understand reaction mechanisms at low energies, a new experimental setup is proposed for measuring the angular distributions and total cross-section for Li-8(alpha, n)B-11.