https://doi.org/10.1140/epja/i2017-12212-y
Regular Article - Experimental Physics
Magnetic rotation phenomenon in the dipole (
) bands of transitional strontium (Sr) isotopes near N=50 shell closure
1
Department of Physics and Astrophysics, University of Delhi, 110007, Delhi, India
2
Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, 400005, Mumbai, India
* e-mail: bhardwaj.physics10@gmail.com
Received:
21
October
2015
Accepted:
23
January
2017
Published online:
14
February
2017
The lifetime measurements were done for the transitions of the dipole (
) bands in 85,86Sr nuclei using the Doppler Shift Attenuation Method (DSAM). The high-spin states in these nuclei were populated in the 76Ge(13C, 4n)85Sr and 76Ge(13C, 3n)86Sr reactions. The B(M1) transition rates have been obtained for the states of two positive-parity dipole () bands in the 85Sr nucleus and one positive-parity dipole () band in the 86 Sr nucleus. The present results on the transition rates are important to know whether these dipole () bands have the signatures of Magnetic Rotation (MR). In order to investigate their magnetic character, the experimental results have been compared with the calculations within the framework of hybrid Tilted-Axis-Cranking (TAC) model. On the basis of the TAC calculations, band 2 of the 85Sr nucleus is assigned the 
configuration and shows the MR character, while for band 3, the 
configuration is suggested. In the case of 86Sr nucleus, band 3 has the 
configuration below the spin 
and above this spin the 
configuration plays an important role. The experimental B(M1) transition rates show a decreasing trend with the increase in spin and are comparable with the TAC calculations before the .
© SIF, Springer-Verlag Berlin Heidelberg, 2017
