Jun 13 – 17, 2022
Berkeley, CA
US/Pacific timezone

Collectivity evolution of proton-rich Mo isotopes

Jun 14, 2022, 2:30 PM
Berkeley, CA

Berkeley, CA

Lawrence Berkeley National Laboratory
Oral Oral Presentations NS2022 Plenary


Jeongsu Ha (IKS, KU Leuven)


The self-conjugate N=Z nuclei have been an intriguing subject for a long time due to their peculiar characteristics for proton-neutron correlations and quadrupole-quadrupole interactions. In particular, a significant shape change has been anticipated among the medium-mass nuclides. The structure of N=Z molybdenum (Z=42) isotope, 84Mo, attracts attention in this viewpoint since the theoretical results represented by the ground-state shape are sensitive to shell model calculation with different model spaces and a choice of the interaction. For example, a shell model calculation based on the Nilsson SU(3) scheme revealed that 84Mo is a transitional nuclide that prolate-oblate shape competition emerges. Thus, a detailed study of the Mo isotope provides valuable results to feedback the nuclear theories. We aimed at investigating the collectivity and shape of 84Mo and its neighbors through a first 2+ state lifetime measurement. The experiment was performed at NSCL/MSU with a 140-MeV/u 92Mo primary beam impinging on a 235-mg/cm2 9Be target. The TRIPLEX plunger setup coupled to the GRETINA was employed to populate the low-lying states and measure the lifetime. The results of the new lifetime measurement for 84Mo and 86Mo are presented. Furthermore, the change of the collectivity around A=70-80 is discussed with the shell model calculation with the DNP-ZBM3 effective interaction.

Primary author

Jeongsu Ha (IKS, KU Leuven)


Francesco Recchia (Università di Padova) Silvia Lenzi (Università di Padova) Hironori Iwasaki (NSCL/MSU) Dr Aldric Revel (CEA Saclay (IRFU)) Pablo Aguilera (Università di Padova) Giacomo de Angelis (Laboratori Nazionali di Legnaro) John Ash (MSU/NSCL) Daniel Bazin (NSCL) Prof. M. A. Bentley (Univ of York) S, Biswas (GANIL, CEA/DRF-CNRS/IN2P3, Caen Cedex, France) Sara Carollo (Università di Padova) Martha Liliana Cortes Dao Duy Duc (Universit ́e de Strasbourg) Dr R. Elder (NSCL, Michigan State Univ) Rafael Escudeiro (Universidade de Sao Paulo) P. Farris (National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA) Alexandra Gade (NSCL/MSU) Tom Ginter (Michigan State University) Dr M. Grinder (NSCL, Michigan State Univ) Jing Li (NSCL, Michigan State University) Augusto Macchiavelli (Lawrence Berkeley National Laboratory) Daniel Napoli (Laboratori Nazionali di Legnaro) Shumpei Noji (NSCL, Michigan State University) Frederic Nowacki (Universit ́e de Strasbourg) Jorge Pereira (NSCL, Michigan State University) Sara Pigliapoco (Università di Padova) Andrea Pompermaier (Università di Padova) Kseniia Rezynkina (Università di Padova) Andrew Sanchez (NSCL, Michigan State University) Robert Wadsworth (University of York) Dr Dirk Weisshaar (NSCL)

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