Mass measurements of $^{56-57}$Cr and the question of shell reincarnation at $N = 32$

Binding energies determined with high accuracy provide smooth derivatives of the mass surface for analysis of shell and pairing effects. Measurements with the Penning trap mass spectrometer ISOLTRAP at CERN-ISOLDE were made for $^{56-57}$Cr for which an accuracy of $4 \times 10^{-8}$ was achieved. A...

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Detalles Bibliográficos
Autores principales: Guenaut, Celine, Audi, G, Beck, D, Blaum, Klaus, Bollen, Georg, Delahaye, P, Herfurth, F, Kellerbauer, A G, Kluge, H J, Lunney, M D, Schwarz, S, Schweikhard, L, Yazidjian, C
Lenguaje:eng
Publicado: 2005
Materias:
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1088/0954-3899/31/10/069
http://cds.cern.ch/record/915115
Descripción
Sumario:Binding energies determined with high accuracy provide smooth derivatives of the mass surface for analysis of shell and pairing effects. Measurements with the Penning trap mass spectrometer ISOLTRAP at CERN-ISOLDE were made for $^{56-57}$Cr for which an accuracy of $4 \times 10^{-8}$ was achieved. Analysis of the mass surface for the supposed new $N = 32$ shell closure rather indicates a sub-shell closure, but of a different nature than known cases such as $^{94}$Sr.

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