| Autor: |
Pogliano, Francesco, Larsen, Ann-Cecilie, Garrote, Frank Leonel Bello, Bjørøen, Marianne Møller, Eriksen, Tomas Kvalheim, Gjestvang, Dorthea, Görgen, Andreas, Guttormsen, Magne, Li, Kevin Ching Wei, Markova, Maria, Matthews, Eric Francis, Paulsen, Wanja, Pedersen, Line Gaard, Siem, Sunniva, Storebakken, Tellef, Tornyi, Tamas Gabor, Vevik, Julian Ersland |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Phys. Rev. C 106, 015804, Published 25 July 2022 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevC.106.015804 |
| Popis: |
Nuclei in the $^{135}$I region have been identified as being a possible bottleneck for the \textit{i} process. Here we present an indirect measurement for the Maxwellian-averaged cross section of $^{126}\text{Sb}(n,\gamma)$. The nuclear level density and the $\gamma$-ray strength function of $^{127}$Sb have been extracted from $^{124}$Sn$(\alpha,p\gamma)^{127}$Sb data using the Oslo method. The level density in the low-excitation-energy region agrees well with known discrete levels, and the higher-excitation-energy region follows an exponential curve compatible with the constant-temperature model. The strength function between $E_\gamma\approx$ 1.5-8.0 MeV presents several features, such as an upbend and a possibly double-peaked pygmy-like structure. None of the theoretical models included in the nuclear reaction code TALYS seem to reproduce the experimental data. The Maxwellian-averaged cross section for the $^{126}$Sb$(n,\gamma)^{127}$Sb reaction has been experimentally constrained by using our level-density and strength-function data as input to TALYS. We observe a good agreement with the JINA REACLIB, TENDL, and BRUSLIB libraries, while the ENDF/B-VIII.0 library predicts a significantly higher rate than our results. |
| Databáze: |
arXiv |
| Externí odkaz: |
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