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Article: Study of the N=32 and N=34 Shell Gap for Ti and V by the First High-Precision Multireflection Time-of-Flight Mass Measurements at BigRIPS-SLOWRI

TitleStudy of the N=32 and N=34 Shell Gap for Ti and V by the First High-Precision Multireflection Time-of-Flight Mass Measurements at BigRIPS-SLOWRI
Authors
Issue Date5-Jan-2023
PublisherAmerican Physical Society
Citation
Physical Review Letters, 2023, v. 130, n. 1, p. 1-6 How to Cite?
Abstract

The atomic masses of 55Sc, 56;58Ti, and 56−59V have been determined using the high-precision
multireflection time-of-flight technique. The radioisotopes have been produced at RIKEN’s Radioactive
Isotope Beam Factory (RIBF) and delivered to the novel designed gas cell and multireflection system,
which has been recently commissioned downstream of the ZeroDegree spectrometer following the
BigRIPS separator. For 56;58Ti and 56−59V, the mass uncertainties have been reduced down to the order of 10 keV, shedding new light on the N ¼ 34 shell effect in Ti and V isotopes by the first high-precision mass measurements of the critical species 58Ti and 59V. With the new precision achieved, we reveal the
nonexistence of the N ¼ 34 empirical two-neutron shell gaps for Ti and V, and the enhanced energy gap
above the occupied νp3=2 orbit is identified as a feature unique to Ca. We perform new Monte Carlo shell
model calculations including the νd5=2 and νg9=2 orbits and compare the results with conventional shell
model calculations, which exclude the νg9=2 and the νd5=2 orbits. The comparison indicates that the shell
gap reduction in Ti is related to a partial occupation of the higher orbitals for the outer two valence neutrons at N ¼ 34.


Persistent Identifierhttp://hdl.handle.net/10722/331114
ISSN
2023 Impact Factor: 8.1
2023 SCImago Journal Rankings: 3.040
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorIimura, S-
dc.contributor.authorRosenbusch, M-
dc.contributor.authorTakamine, A-
dc.contributor.authorTsunoda, Y-
dc.contributor.authorWada, M-
dc.contributor.authorChen, S-
dc.contributor.authorHou, DS-
dc.contributor.authorXian, W-
dc.contributor.authorIshiyama, H-
dc.contributor.authorYan, S-
dc.contributor.authorSchury, P-
dc.contributor.authorCrawford, H-
dc.contributor.authorDoornenbal, P-
dc.contributor.authorHirayama, Y-
dc.contributor.authorIto, Y-
dc.contributor.authorKimura, S-
dc.contributor.authorKoiwai, T-
dc.contributor.authorKojima, TM-
dc.contributor.authorKoura, H-
dc.contributor.authorLee, J-
dc.contributor.authorLiu, J-
dc.contributor.authorMichimasa, S-
dc.contributor.authorMiyatake, H-
dc.contributor.authorMoon, JY-
dc.contributor.authorNaimi, S-
dc.contributor.authorNishimura, S-
dc.contributor.authorNiwase, T-
dc.contributor.authorOdahara, A-
dc.contributor.authorOtsuka, T-
dc.contributor.authorPaschalis, S-
dc.contributor.authorPetri, M-
dc.contributor.authorShimizu, N-
dc.contributor.authorSonoda, T-
dc.contributor.authorSuzuki, D-
dc.contributor.authorWatanabe, YX-
dc.contributor.authorWimmer, K-
dc.contributor.authorWollnik, H-
dc.date.accessioned2023-09-21T06:52:52Z-
dc.date.available2023-09-21T06:52:52Z-
dc.date.issued2023-01-05-
dc.identifier.citationPhysical Review Letters, 2023, v. 130, n. 1, p. 1-6-
dc.identifier.issn0031-9007-
dc.identifier.urihttp://hdl.handle.net/10722/331114-
dc.description.abstract<p>The atomic masses of 55Sc, 56;58Ti, and 56−59V have been determined using the high-precision<br>multireflection time-of-flight technique. The radioisotopes have been produced at RIKEN’s Radioactive<br>Isotope Beam Factory (RIBF) and delivered to the novel designed gas cell and multireflection system,<br>which has been recently commissioned downstream of the ZeroDegree spectrometer following the<br>BigRIPS separator. For 56;58Ti and 56−59V, the mass uncertainties have been reduced down to the order of 10 keV, shedding new light on the N ¼ 34 shell effect in Ti and V isotopes by the first high-precision mass measurements of the critical species 58Ti and 59V. With the new precision achieved, we reveal the<br>nonexistence of the N ¼ 34 empirical two-neutron shell gaps for Ti and V, and the enhanced energy gap<br>above the occupied νp3=2 orbit is identified as a feature unique to Ca. We perform new Monte Carlo shell<br>model calculations including the νd5=2 and νg9=2 orbits and compare the results with conventional shell<br>model calculations, which exclude the νg9=2 and the νd5=2 orbits. The comparison indicates that the shell<br>gap reduction in Ti is related to a partial occupation of the higher orbitals for the outer two valence neutrons at N ¼ 34.<br></p>-
dc.languageeng-
dc.publisherAmerican Physical Society-
dc.relation.ispartofPhysical Review Letters-
dc.titleStudy of the N=32 and N=34 Shell Gap for Ti and V by the First High-Precision Multireflection Time-of-Flight Mass Measurements at BigRIPS-SLOWRI-
dc.typeArticle-
dc.identifier.doi10.1103/PhysRevLett.130.012501-
dc.identifier.scopuseid_2-s2.0-85146112568-
dc.identifier.volume130-
dc.identifier.issue1-
dc.identifier.spage1-
dc.identifier.epage6-
dc.identifier.eissn1079-7114-
dc.identifier.isiWOS:000980052400002-
dc.identifier.issnl0031-9007-

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