Alternating parity bands in doubly odd 218Ac129 and octupole instability in the light actinide region

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High-spin states of doubly odd 218Ac1129 have been investigated using in-beam α, γ and conversion electron spectroscopy techniques through the 209Bi(12(13)C,3(4)n) fusion-evaporation reactions. The level scheme of 218Ac shows three interconnected, alternating parity structures, each one linked by st...

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Detalles Bibliográficos
Autores principales: Debray, M.E., Kreiner, A.J., Davidson, M., Davidson, J., Hojman, D., Santos, D., Vanin, V.R., Schulz, N., Aiche, M., Chevallier, A., Chevallier, J., Sens, J.C.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03759474_v568_n1_p141_Debray
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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Sumario:High-spin states of doubly odd 218Ac1129 have been investigated using in-beam α, γ and conversion electron spectroscopy techniques through the 209Bi(12(13)C,3(4)n) fusion-evaporation reactions. The level scheme of 218Ac shows three interconnected, alternating parity structures, each one linked by strong El transitions. Two of these bands are strikingly similar to the known scheme of the isotone 217Ra and this analogy is shown to persist for the pair 220Ac, 219Ra. The relation between the structure of 218Ac and its neighbors is thoroughly discussed showing that the first signals of octupole collectivity appear for N = 129. © 1994.

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