The g factor of the 12 +K-isomer in 174W has been measured by means of the time-differential perturbed angular distribution technique as g(12 +) = + 0.304 (11). In addition, the half-life of the isomer has been remeasured as T1 / 2(12 +) = 124 (8) ns, in agreement with the literature value and confirming the anomalous hindrance F of the E2 transition to the 10 + level of the ground state band with respect to the γ-tunnelling model prediction. The measured g factor has been compared with estimates based on experimental g factors from odd-mass isotopes in the same mass region and with Nilsson model calculations. The results establish unique features of the 12 +K-isomer in 174W, which can possess a non-pure intrinsic configuration and/or can be characterised by values of the intrinsic quadrupole moment Q and the rotational g factor gR significantly different with respect to the majority of K-isomers at mass A≈ 180.

g factor of the 12 + K-isomer in 174 W / M. Rocchini, A. Nannini, G. Benzoni, E. Vigezzi, B. Melon, P.R. John, S. Bottoni, S. Ceruti, R. Avigo, P. Sona, C.A. Ur, D. Bazzacco, N. Blasi, G. Bocchi, A. Bracco, F. Camera, S. Capra, F.C.L. Crespi, E.R. Gamba, G. Georgiev, A. Giaz, A. Gottardo, S. Leoni, R. Menegazzo, D. Mengoni, C. Michelagnoli, B. Million, V. Modamio, A.I. Morales, D.R. Napoli, M. Ottanelli, L. Pellegri, A. Perego, J.J. Valiente-Dobon, O. Wieland. - In: THE EUROPEAN PHYSICAL JOURNAL. A, HADRONS AND NUCLEI. - ISSN 1434-6001. - 56:11(2020 Nov). [10.1140/epja/s10050-020-00298-3]

g factor of the 12 + K-isomer in 174 W

S. Bottoni;S. Ceruti;R. Avigo;G. Bocchi;A. Bracco;F. Camera;S. Capra;F.C.L. Crespi;E.R. Gamba;A. Giaz;S. Leoni;L. Pellegri;
2020-11

Abstract

The g factor of the 12 +K-isomer in 174W has been measured by means of the time-differential perturbed angular distribution technique as g(12 +) = + 0.304 (11). In addition, the half-life of the isomer has been remeasured as T1 / 2(12 +) = 124 (8) ns, in agreement with the literature value and confirming the anomalous hindrance F of the E2 transition to the 10 + level of the ground state band with respect to the γ-tunnelling model prediction. The measured g factor has been compared with estimates based on experimental g factors from odd-mass isotopes in the same mass region and with Nilsson model calculations. The results establish unique features of the 12 +K-isomer in 174W, which can possess a non-pure intrinsic configuration and/or can be characterised by values of the intrinsic quadrupole moment Q and the rotational g factor gR significantly different with respect to the majority of K-isomers at mass A≈ 180.
Settore FIS/04 - Fisica Nucleare e Subnucleare
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/795097
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