Abstract
The possible microscopic realization of Interactive Boson Model (IBM) collective M1 modes is investigated for {sup 54,56}Cr and {sup 56,58,60}Fe, using a shell model space of protons in the 1f{sub 7/2} orbit and neutrons in the 2p{sub 3/2}, and 2p{sub 2/2} orbits. Distributions of the pair-analogues of IBM-2 mixed-symmetry states, and of some g-IBM-2 states, over shell model eigenstates are explicitly determined. For J = 1, the mixed-symmetry SD strength is generally lower than that of the G-pair states, and responsible for most of the low-energy M1 strength. Structures incorporating extended sets of levels, including the M1 states, corresponding to the sd-IBM-2 dynamical symmetry representations are manifest in the shell model spectra for {sup 56}Fe and {sup 54}Cr. The correspondence with observed levels is discussed. 24 refs., 3 tabs., 2 figs.
Citation Formats
Halse, P.
Pair condensate in realistic shell model states. Part 2: M1 states in {sup 54,56}Cr and {sup 56,58,60}Fe.
Australia: N. p.,
1991.
Web.
Halse, P.
Pair condensate in realistic shell model states. Part 2: M1 states in {sup 54,56}Cr and {sup 56,58,60}Fe.
Australia.
Halse, P.
1991.
"Pair condensate in realistic shell model states. Part 2: M1 states in {sup 54,56}Cr and {sup 56,58,60}Fe."
Australia.
@misc{etde_10102596,
title = {Pair condensate in realistic shell model states. Part 2: M1 states in {sup 54,56}Cr and {sup 56,58,60}Fe}
author = {Halse, P}
abstractNote = {The possible microscopic realization of Interactive Boson Model (IBM) collective M1 modes is investigated for {sup 54,56}Cr and {sup 56,58,60}Fe, using a shell model space of protons in the 1f{sub 7/2} orbit and neutrons in the 2p{sub 3/2}, and 2p{sub 2/2} orbits. Distributions of the pair-analogues of IBM-2 mixed-symmetry states, and of some g-IBM-2 states, over shell model eigenstates are explicitly determined. For J = 1, the mixed-symmetry SD strength is generally lower than that of the G-pair states, and responsible for most of the low-energy M1 strength. Structures incorporating extended sets of levels, including the M1 states, corresponding to the sd-IBM-2 dynamical symmetry representations are manifest in the shell model spectra for {sup 56}Fe and {sup 54}Cr. The correspondence with observed levels is discussed. 24 refs., 3 tabs., 2 figs.}
place = {Australia}
year = {1991}
month = {Dec}
}
title = {Pair condensate in realistic shell model states. Part 2: M1 states in {sup 54,56}Cr and {sup 56,58,60}Fe}
author = {Halse, P}
abstractNote = {The possible microscopic realization of Interactive Boson Model (IBM) collective M1 modes is investigated for {sup 54,56}Cr and {sup 56,58,60}Fe, using a shell model space of protons in the 1f{sub 7/2} orbit and neutrons in the 2p{sub 3/2}, and 2p{sub 2/2} orbits. Distributions of the pair-analogues of IBM-2 mixed-symmetry states, and of some g-IBM-2 states, over shell model eigenstates are explicitly determined. For J = 1, the mixed-symmetry SD strength is generally lower than that of the G-pair states, and responsible for most of the low-energy M1 strength. Structures incorporating extended sets of levels, including the M1 states, corresponding to the sd-IBM-2 dynamical symmetry representations are manifest in the shell model spectra for {sup 56}Fe and {sup 54}Cr. The correspondence with observed levels is discussed. 24 refs., 3 tabs., 2 figs.}
place = {Australia}
year = {1991}
month = {Dec}
}