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

The g factor of the 12 + K -isomer in 174 W 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 T 1 / 2 ( 12 + ) = 124 ( 8 )  ns, in agreement with the literature...

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Published in:The European physical journal. A, Hadrons and nuclei Hadrons and nuclei, 2020, Vol.56 (11)
Main Authors: Rocchini, M., Nannini, A., Benzoni, G., Vigezzi, E., Melon, B., John, P. R., Bottoni, S., Ceruti, S., Avigo, R., Sona, P., Ur, C. A., Bazzacco, D., Blasi, N., Bocchi, G., Bracco, A., Camera, F., Capra, S., Crespi, F. C. L., Gamba, E. R., Georgiev, G., Giaz, A., Gottardo, A., Leoni, S., Menegazzo, R., Mengoni, D., Michelagnoli, C., Million, B., Modamio, V., Morales, A. I., Napoli, D. R., Ottanelli, M., Pellegri, L., Perego, A., Valiente-Dobón, J. J., Wieland, O.
Format: Article
Language:English
Subjects:
Angular distribution
Hadrons
Heavy Ions
Isomers
Nuclear Fusion
Nuclear Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Quadrupoles
Regular Article - Experimental Physics
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Summary:The g factor of the 12 + K -isomer in 174 W 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 T 1 / 2 ( 12 + ) = 124 ( 8 )  ns, in agreement with the literature value and confirming the anomalous hindrance F of the E 2 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 174 W, which can possess a non-pure intrinsic configuration and/or can be characterised by values of the intrinsic quadrupole moment Q 0 and the rotational g factor g R significantly different with respect to the majority of K -isomers at mass A ≈ 180 .
ISSN:1434-6001
1434-601X
DOI:10.1140/epja/s10050-020-00298-3