https://doi.org/10.1140/epja/s10050-020-00298-3
Regular Article - Experimental Physics
g factor of the 
K-isomer in 
W
1
INFN Sezione di Firenze, 50019, Florence, Italy
2
Dipartimento di Fisica e Astronomia, Università degli Studi di Firenze, 50019, Florence, Italy
3
Department of Physics, University of Guelph, N1G2W1, Guelph, Canada
4
INFN Sezione di Milano, 20133, Milan, Italy
5
Dipartimento di Fisica e Astronomia, Università degli Studi di Padova, 35131, Padua, Italy
6
INFN Sezione di Padova, 35131, Padova, Italy
7
Institut für Kernphysik, Technische Universität Darmstadt, 64289, Darmstadt, Germany
8
Dipartimento di Fisica, Università degli Studi di Milano, 20133, Milan, Italy
9
Centre de Sciences Nucléaires et de Sciences de la Matiére (CSNSM), 91405, Orsay, France
10
INFN Laboratori Nazionali di Legnaro, 35020, Padua, Italy
11
GANIL, 14076, Caen, France
12
Institut Laue-Langevin, 38042, Grenoble Cedex, France
Received:
7
August
2020
Accepted:
1
November
2020
Published online:
11
November
2020
The g factor of the K-isomer in W has been measured by means of the time-differential perturbed angular distribution technique as 
. In addition, the half-life of the isomer has been remeasured as 
ns, in agreement with the literature value and confirming the anomalous hindrance F of the E2 transition to the 
level of the ground state band with respect to the 
-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 K-isomer in W, which can possess a non-pure intrinsic configuration and/or can be characterised by values of the intrinsic quadrupole moment 
and the rotational g factor 
significantly different with respect to the majority of K-isomers at mass 
.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2020
