Quenching of the N=32 neutron shell closure studied via precision mass measurements of neutron-rich vanadium isotopes

M. P. Reiter, S. Ayet San Andrés, E. Dunling, B. Kootte, E. Leistenschneider, C. Andreoiu, C. Babcock, B. R. Barquest, J. Bollig, T. Brunner, I. Dillmann, A. Finlay, G. Gwinner, L. Graham, J. D. Holt, C. Hornung, C. Jesch, R. Klawitter, Y. Lan, D. LascarJ. E. McKay, S. F. Paul, R. Steinbrügge, R. Thompson, J. L. Tracy, M. E. Wieser, C. Will, T. Dickel, W. R. Plaß, C. Scheidenberger, A. A. Kwiatkowski, J. Dilling

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28 Scopus citations

Abstract

We performed the first direct mass measurements of neutron-rich vanadium V52-55 isotopes passing the N=32 neutron shell closure with TRIUMF's Ion Trap for Atomic and Nuclear science. The new direct measurements confirm all previous indirect results. Through a reduced uncertainty of the mass of V55 we confirm the quenching of the N=32 neutron shell closure in vanadium. We discuss the evolution of the N=32 neutron shell closure between K and Cr and show similar signatures in the half-life surface when studied along the isotopic chains.

Original languageEnglish
Article number024310
JournalPhysical Review C
Volume98
Issue number2
DOIs
StatePublished - Aug 15 2018
Externally publishedYes

Funding

We would like to thank C. Barbieri, H. Hergert, P. Navrátil, A. Schwenk, J. Simonis, V. Somà, S. R. Stroberg for fruitful discussions and for helping with understanding the evolution of the shell closure, F. Ames, P. Kunz, J. Lassen, R. Li, M. Mostamand, B. E. Schulz, and A. Teigelhoefer for spectroscopy at the ISAC Yield Station, and H. L. Crawford for her input towards the spectroscopy of Ti. This work is supported partially by Canadian agencies NSERC and CFI, U.S.A. NSF (Grants No. PHY-1419765 and No. PHY-1614130) and DOE (Grant No. DE-SC0017649), Brazil's CNPq (Grant No. 249121/2013-1), United Kingdom's STFC (Grants No. ST/L005743/1 and No. ST/P005314/1), German institutions DFG (Grants No. FR 601/3-1 and No. SFB1245 and through PRISMACluster of Excellence), BMBF (Grants No. 05P15RDFN1 and No. 05P12RGFN8), the Helmholtz Association through NAVI (Grant No. VH-VI-417), HMWK through the LOEWE Center HICforFAIR, and the JLU-GSI partnership. Computations were performed with resources of the Jülich Supercomputing Center (JURECA), GENCI-TGCC (Grant No. 2017-0507392), MSUs iCER and UKs DiRAC Complexity system (Grants No. ST/K000373/1 and No. ST/K0003259/1). TRIUMF receives federal funding via NRC-CNRC.

FundersFunder number
Canadian agencies NSERC
GENCI-TGCC2017-0507392, ST/K0003259/1, ST/K000373/1
HMWK
JLU-GSI
JURECA
Jülich Supercomputing Center
National Science FoundationPHY-1419765, PHY-1614130
National Science Foundation
U.S. Department of EnergyDE-SC0017649
U.S. Department of Energy
Canada Foundation for Innovation
Science and Technology Facilities CouncilST/L005743/1, ST/P005314/1
Science and Technology Facilities Council
Deutsche ForschungsgemeinschaftSFB1245, FR 601/3-1
Deutsche Forschungsgemeinschaft
Bundesministerium für Bildung und Forschung05P12RGFN8, 05P15RDFN1
Bundesministerium für Bildung und Forschung
Conselho Nacional de Desenvolvimento Científico e Tecnológico249121/2013-1
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Helmholtz AssociationVH-VI-417
Helmholtz Association

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