¹³⁷,¹³⁸,¹³⁹La(n,γ) cross sections constrained with statistical decay properties of ¹³⁸,¹³⁹,¹⁴⁰La nuclei

Kheswa, B. V. ; Wiedeking, M. ; Brown, J. A. ; Larsen, A. C. ; Goriely, S. ; Guttormsen, M. ; Garrote, F. L. Bello ; Bernstein, L. A. ; Bleuel, D. L. ; Eriksen, T. K. ; Giacoppo, F. ; Gorgen, A. ; Goldblum, B. L. ; Hagen, T. W. ; Koehler, P. E. ; Klintefjord, M. ; Malatji, K. L. ; Midtbo, J. E. ; Nyhus, H. T. ; Papka, P. ; Renstrm, T. ; Rose, S. J. ; Sahin, E. ; Siem, S. ; Tornyi, T. G. (2017)

CITATION: Kheswa, B. V., et al. 2017. ¹³⁷,¹³⁸,¹³⁹La(n,γ) cross sections constrained with statistical decay properties of ¹³⁸,¹³⁹,¹⁴⁰La nuclei. Physical Review C, 95(4):1-9, doi:10.1103/PhysRevC.95.045805.

The original publication is available at https://journals.aps.org/prc

Article

The nuclear level densities and γ-ray strength functions of ¹³⁸,¹³⁹,¹⁴⁰La were measured using the ¹³⁹La(³He,α), ¹³⁹La(³He,'³He), and ¹³⁹La(d,p) reactions. The particle-γ coincidences were recorded with the silicon particle telescope (SiRi) and NaI(Tl) (CACTUS) arrays. In the context of these experimental results, the low-energy enhancement in the A∼140 region is discussed. The ¹³⁷,¹³⁸,¹³⁹La(n,γ) cross sections were calculated at s- and p-process temperatures using the experimentally measured nuclear level densities and γ-ray strength functions. Good agreement is found between ¹³⁹La(n,γ) calculated cross sections and previous measurements.

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