Abstract
The neutron-rich nucleus is investigated via in-beam -ray spectroscopy to study the shape evolution in the neutron-rich platinum isotopes towards the shell closure. The two-neutron transfer reaction () is used to populate excited states of . The Advanced Gamma Ray Tracking Array (AGATA) demonstrator coupled with the PRISMA spectrometer detects rays coincident with the recoils, the binary partner of . The binary partner method is applied to extract the -ray transitions and build the level scheme of . The level at 1884 keV reported by Yates et al. [S. W. Yates, E. M. Baum, E. A. Henry, L. G. Mann, N. Roy, A. Aprahamian, R. A. Meyer, and R. Estep, Phys. Rev. C 37, 1889 (1988)] was confirmed to be at 1882.1 keV and assigned as the state. An additional ray was found and it presumably deexcites the state. The results are compared with state-of-the-art beyond mean-field calculations, performed for the even-even isotopes, revealing that marks the transition from the -unstable behavior of lighter Pt nuclei towards a more spherical one when approaching the shell closure.
- Received 28 March 2016
- Revised 3 April 2017
DOI:https://doi.org/10.1103/PhysRevC.95.064321
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