Summary
A compilation of even-even nuclei whose first excited level is 0+, 1− or 3− is presented. The proton and neutron energy gaps for these nuclei are tabulated. From theoretical calculations such as relative deduced alpha widths δ2, and pairing energy parameters, as well as the systematics of experimental energy patterns of the low-lying levels of146Gd, probable shell closure atZ=64 is suggested.
Riassunto
Si presenta una compilazione dei nuclei pari-pari il cui primo livello eccitato è 0+, 1− o 3−. Si tabulano i gap di energia protonica e neutronica per questi nuclei. Si suggerisce una probabile chiusura dello strato perZ=64 partendo da calcoli teorici come le ampiezze alfa relative ridotte δ2 e i parametri dell’energia di appaiamento, cosí come dalla sistematica dei modelli sperimentali dell’energia dei livelli inferiori di146Gd.
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Traduzione a cura della Redazione.
An erratum to this article is available at http://dx.doi.org/10.1007/BF02730502.
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Antony, M.S. The 0+, 1−, 3− first excited states of even-even nuclei; shell closure atZ=64. Nuov Cim A 91, 217–224 (1986). https://doi.org/10.1007/BF02819299
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DOI: https://doi.org/10.1007/BF02819299