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Journal articles
Restoration of the N=82 shell gap from direct mass measurements of (132,134)Sn
Abstract : A high-precision direct Penning trap mass measurement has revealed a 0.5-MeV deviation of the binding energy of (134)Sn from the currently accepted value. The corrected mass assignment of this neutron-rich nuclide restores the neutron-shell gap at N=82, previously considered to be a case of "shell quenching." In fact, the new shell gap value for the short-lived (132)Sn is larger than that of the doubly magic (48)Ca which is stable. The N=82 shell gap has considerable impact on fission recycling during the r process. More generally, the new finding has important consequences for microscopic mean-field theories which systematically deviate from the measured binding energies of closed-shell nuclides.
http://hal.in2p3.fr/in2p3-00854785
Contributor : Christine Hadrossek Connect in order to contact the contributor
Submitted on : Wednesday, August 28, 2013 - 10:36:28 AM
Last modification on : Wednesday, September 16, 2020 - 5:42:43 PM
Contributor : Christine Hadrossek Connect in order to contact the contributor
Submitted on : Wednesday, August 28, 2013 - 10:36:28 AM
Last modification on : Wednesday, September 16, 2020 - 5:42:43 PM
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