An in-beamgamma-ray study performed with the114Cd(30Si,p 3n) reaction has established the structure of theN=79 nucleus140Pm. States up toI=(20)hstrok and 5.5 MeV excitation energy have been recognized above the 5.95 m isomeric state which we identify, from the GT decay to140Nd, as the 8– member of the (pgrd 5 2/–1 vh 11 2/–1 ) multiplet, changing the present 7– assignment. The low energy part of the level scheme is discussed in terms of the coupling of the valence holes in respect to theZ=64,N=82 shell closure. A new 8+ isomeric state witht 1/2=1 –0.5 +1 ns has been observed, having most likely a (pgrh 11/2 vh 11/2 -1 )8 configuration.

In-beam study of the doubly-odd nucleus 140Pm above the 8- beta-decaying isomer

LUNARDI, SANTO;
1993

Abstract

An in-beamgamma-ray study performed with the114Cd(30Si,p 3n) reaction has established the structure of theN=79 nucleus140Pm. States up toI=(20)hstrok and 5.5 MeV excitation energy have been recognized above the 5.95 m isomeric state which we identify, from the GT decay to140Nd, as the 8– member of the (pgrd 5 2/–1 vh 11 2/–1 ) multiplet, changing the present 7– assignment. The low energy part of the level scheme is discussed in terms of the coupling of the valence holes in respect to theZ=64,N=82 shell closure. A new 8+ isomeric state witht 1/2=1 –0.5 +1 ns has been observed, having most likely a (pgrh 11/2 vh 11/2 -1 )8 configuration.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2494507
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