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Journal articles
Surveying the N=40 island of inversion with new manganese masses
S. Naimi
1
G. Audi
1
D. Beck
K. Blaum
Ch. Böhm
Ch. Borgmann
M. Breitenfeldt
S. George
F. Herfurth
A. Herlert
A. Kellerbauer
M. Kowalska
D. Lunney
1
E. Minaya Ramirez
D. Neidherr
M. Rosenbusch
L. Schweikhard
R. N. Wolf
K. Zuber
1
CSNSM SNO
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière : UMR8609
1
CSNSM SNO (France)
- CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (batiments 104 et 108 - 91405 Orsay Campus - France)
- CNRS - Centre National de la Recherche Scientifique : UMR8609 (France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- UP11 - Université Paris-Sud - Paris 11 (Bâtiment 300 - 91405 Orsay cedex - France)
- CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière : UMR8609 (Bâtiments 104 et 108 91405 Orsay Campus - France)
- UP11 - Université Paris-Sud - Paris 11 (Bâtiment 300 - 91405 Orsay cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR8609 (France)
Abstract : 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. ©2012 American Physical Society
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http://hal.in2p3.fr/in2p3-00750856
Contributor : Christine Hadrossek <>
Submitted on : Monday, November 12, 2012 - 3:29:50 PM
Last modification on : Wednesday, September 16, 2020 - 5:42:41 PM
Contributor : Christine Hadrossek <>
Submitted on : Monday, November 12, 2012 - 3:29:50 PM
Last modification on : Wednesday, September 16, 2020 - 5:42:41 PM
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- HAL Id : in2p3-00750856, version 1
- DOI : 10.1103/PhysRevC.86.014325
Citation
S. Naimi, G. Audi, D. Beck, K. Blaum, Ch. Böhm, et al.. Surveying the N=40 island of inversion with new manganese masses. Physical Review C, American Physical Society, 2012, 86, pp.014325. ⟨10.1103/PhysRevC.86.014325⟩. ⟨in2p3-00750856⟩
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