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Lifetime measurements in Ti-52,Ti-54 to study shell evolution toward N=32
Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.ORCID iD: 0000-0002-2545-6392
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.ORCID iD: 0000-0003-1771-2656
Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
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Number of Authors: 892019 (English)In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 100, no 5, article id 054317Article in journal (Refereed) Published
Abstract [en]

Lifetimes of the excited states in the neutron-rich Ti-52,Ti-54 nuclei, produced in a multinucleon-transfer reaction, were measured by employing the Cologne plunger device and the recoil-distance Doppler-shift method. The experiment was performed at the Grand Accelerateur National d'Ions Lourds facility by using the Advanced Gamma Tracking Array for the gamma-ray detection, coupled to the large-acceptance variable mode spectrometer for an event-by-event particle identification. A comparison between the transition probabilities obtained from the measured lifetimes of the 2(1)(+) to 8(1)(+) yrast states in Ti-52,Ti-54 and that from the shell-model calculations based on the well-established GXPF1A, GXPF1B, and KB3G fp shell interactions support the N = 32 subshell closure. The B(E2) values for Ti-52 determined in this work are in disagreement with the known data, but are consistent with the predictions of the shell-model calculations and reduce the previously observed pronounced staggering across the even-even titanium isotopes.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2019. Vol. 100, no 5, article id 054317
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Subatomic Physics
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URN: urn:nbn:se:kth:diva-265218DOI: 10.1103/PhysRevC.100.054317ISI: 000496925500001Scopus ID: 2-s2.0-85075800207OAI: oai:DiVA.org:kth-265218DiVA, id: diva2:1380745
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QC 20191219

Available from: 2019-12-19 Created: 2019-12-19 Last updated: 2019-12-19Bibliographically approved

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Atac Nyberg, AyseCederwall, Bo

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