Surveying the N=40 island of inversion with new manganese masses - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review C Year : 2012

Surveying the N=40 island of inversion with new manganese masses

S. Naimi
G. Audi
  • Function : Author
D. Beck
  • Function : Author
K. Blaum
Ch. Böhm
  • Function : Author
Ch. Borgmann
  • Function : Author
M. Breitenfeldt
  • Function : Author
S. George
  • Function : Author
F. Herfurth
  • Function : Author
A. Herlert
  • Function : Author
A. Kellerbauer
  • Function : Author
M. Kowalska
  • Function : Author
D. Lunney
  • Function : Author
E. Minaya Ramirez
  • Function : Author
D. Neidherr
  • Function : Author
M. Rosenbusch
  • Function : Author
L. Schweikhard
  • Function : Author
R. N. Wolf
  • Function : Author
K. Zuber
  • Function : Author

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

Dates and versions

in2p3-00750856 , version 1 (12-11-2012)

Identifiers

Cite

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, 2012, 86, pp.014325. ⟨10.1103/PhysRevC.86.014325⟩. ⟨in2p3-00750856⟩
22 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More