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HK: Fachverband Physik der Hadronen und Kerne
HK 38: Structure and Dynamics of Nuclei VIII
HK 38.5: Vortrag
Mittwoch, 13. März 2024, 17:00–17:15, HBR 14: HS 4
Test of the prolate-oblate transition: the 21+ lifetime of 190W — E. Sahin1,2,3, •V. Werner1,3, A.K. Mistry1,2,3, M. Rudigier1, K. Nomura4, J. Jolie5, N. Pietralla1, and P.H. Regan6,7 for the S452 collaboration — 1TU Darmstadt — 2GSI — 3HFHF Darmstadt — 4Hokkaido U, Japan — 5U Cologne — 6U Surrey, UK — 7NPL, UK
The region of isotopes toward the doubly-magic 208Pb has been discussed as a candidate region to observe the (phase) transition from prolate to oblate structures. 190W has been identified as an isotope for potentially being close to the transition point (e.g., Refs. [1-3]), having a maximal γ-soft structure. Within the DESPEC, FAIR Phase-0 experiment S452 190W in its isomeric state has been implanted into the AIDA active stopper, surrounded by the FATIMA array and complementary EUROBALL Cluster detectors. The lifetime of its first excited 2+ state has been determined through a fast-timing analysis and is brought into context by comparison to an EDF-IBM model approach [4].
[1] J. Jolie and A. Linnemann, Phys. Rev. C 68, 031301 (2003).
[2] P.J.R. Mason et al., Phys. Rev. C 88, 044301 (2013).
[3] N. Alkhomashi et al., Phys. Rev. C 80, 064308 (2009).
[4] K. Nomura et al., Phys. Rev. C 83, 054303 (2011).
Keywords: Nuclear Structure; Phase Transition; Fast Timing; DESPEC; Collective Models