Collective 2+1 excitations in 206Po and 208,210Rn
Grahn, T., Pakarinen, J., Jokiniemi, L., Albers, M., Auranen, K., Bauer, C., . . . Zielińska, M. (2016). Collective 2+1 excitations in 206Po and 208,210Rn. European Physical Journal A, 52 (340). doi:10.1140/epja/i2016-16340-6
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European Physical Journal ADate
2016Copyright
© Societa Italiana di Fisica/Springer-Verlag 2016. This is a final draft version of an article whose final and definitive form has been published by Springer. Published in this repository with the kind permission of the publisher.
In the present study, B(E2;2+1→0+1)B(E2;21+→01+) values have been measured in the 208,210Rn and 206Po nuclei through Coulomb excitation of re-accelerated radioactive beams in inverse kinematics at CERN-ISOLDE. These nuclei have been proposed to lie in, or at the boundary of the region where the seniority scheme should persist. However, contributions from collective excitations are likely to be present when moving away from the N=126 closed shell. Such an effect is confirmed by the observed increased collectivity of the 2+1→0+121+→01+ transitions. Experimental results have been interpreted with the aid of theoretical studies carried out within the BCS-based QRPA framework.