Statistical properties of the well deformed Sm 153,155 nuclei and the scissors resonance

K. L. Malatji, K. S. Beckmann, M. Wiedeking, S. Siem, S. Goriely, A. C. Larsen, K. O. Ay, F. L. Bello Garrote, L. Crespo Campo, A. Görgen, M. Guttormsen, V. W. Ingeberg, P. Jones, B. V. Kheswa, P. Von Neumann-Cosel, M. Ozgur, G. Potel, L. Pellegri, T. Renstrøm, G. M. TvetenF. Zeiser

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7 Citations (Scopus)

Abstract

The nuclear level densities (NLDs) and the γ-ray strength functions (γSFs) of Sm153,155 have been extracted from (d,pγ) coincidences using the Oslo method. The experimental NLD of Sm153 is higher than the NLD of Sm155, in accordance with microscopic calculations. The γSFs of Sm153,155 are in fair agreement with QRPA calculations based on the D1M Gogny interaction. An enhancement is observed in the γSF for both Sm153,155 nuclei around 3 MeV in excitation energy and is attributed to the M1 scissors resonance (SR). Their integrated strengths were found to be in the range 1.3-2.1 and 4.4-6.4 μN2 for Sm153 and Sm155, respectively. The strength of the SR for Sm155 is comparable to those for deformed even-even Sm isotopes from nuclear resonance fluorescence measurements, while that of Sm153 is lower than expected.

Original languageEnglish
Article number014309
JournalPhysical Review C
Volume103
Issue number1
DOIs
Publication statusPublished - 12 Jan 2021

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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