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First spectroscopy of Ti-61 and the transition to the Island of Inversion at N=40
Univ Tokyo, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan.;RIKEN, Nishina Ctr, 2-1 Hirosawa, Saitama 3510198, Japan..
Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;INFN, Sez Padova, I-35131 Padua, Italy..
Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;INFN, Sez Padova, I-35131 Padua, Italy..
Univ Perugia, Dipartimento Fis & Geol, Perugia, Italy.;INFN, Sez Perugia, Perugia, Italy..
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2019 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 792, p. 16-20Article in journal (Refereed) Published
Abstract [en]

Isomeric states in Ti-59,Ti-61 have been populated in the projectile fragmentation of a 345 AMeV( 238)U beam at the Radioactive Isotope Beam Factory. The decay lifetimes and delayed gamma-ray transitions were measured with the EURICA array. Besides the known isomeric state in Ti-59, two isomeric states in Ti-61 are observed for the first time. Based on the measured lifetimes, transition multipolarities as well as tentative spins and parities are assigned. Large-scale shell model calculations based on the modified LNPS interaction show that both Ti-59 and Ti-61 belong to the Island of Inversion at N = 40 with ground state configurations dominated by particle-hole excitations to the g(9/2 )and d(5/2) orbits.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 792, p. 16-20
Keywords [en]
Radioactive beams, Gamma-ray spectroscopy, Isomeric decay, Shell evolution, Island of Inversion
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-251699DOI: 10.1016/j.physletb.2019.03.018ISI: 000466802100003Scopus ID: 2-s2.0-85063040238OAI: oai:DiVA.org:kth-251699DiVA, id: diva2:1316842
Note

QC 20190521

Available from: 2019-05-21 Created: 2019-05-21 Last updated: 2019-05-29Bibliographically approved

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