6533b81ffe1ef96bd1277235
RESEARCH PRODUCT
Surveying the N=40 island of inversion with new manganese masses
G. AudiMagda KowalskaD. BeckM. BreitenfeldtLutz SchweikhardKai ZuberD. LunneyFrank HerfurthSebastian GeorgeSebastian GeorgeRobert WolfS. NaimiMarco RosenbuschAlexander HerlertDennis NeidherrDennis NeidherrE. Minaya-ramirezAlban KellerbauerChristopher BorgmannKlaus BlaumChristine Böhmsubject
PhysicsNuclear and High Energy Physics010308 nuclear & particles physicsIsland of inversionchemistry.chemical_elementManganeseGeophysics[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]01 natural sciencesNuclear magnetic resonancechemistry0103 physical sciencesNuclear Physics - Experiment010306 general physicsNuclear Experimentdescription
High-precision mass measurements of neutron-rich 57−66Mn and 61−63Fe isotopes are reported. The new mass surface shows no shell closure at N=40. In contrast, there is an increase of the two-neutron separation energy at N=38. This behavior is consistent with the onset of collectivity due to the occupation of intruder states from higher orbits, in analogy with the well known “island of inversion” around N=20. Our results indicate that the neutron-rich Mn isotopes, starting from 63Mn, are most likely within the new island of inversion. From the new mass surface, we evaluate the empirical proton-neutron interaction and the pairing gap, both playing a significant role in the structural changes in this region.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-07-20 |