TY - JOUR
T1 - Shape coexistence and multiparticle-multihole structures in Cd 110,112
AU - Garrett, P. E.
AU - Rodríguez, T. R.
AU - Diaz Varela, A.
AU - Green, K. L.
AU - Bangay, J.
AU - Finlay, A.
AU - Austin, R. A.E.
AU - Ball, G. C.
AU - Bandyopadhyay, D. S.
AU - Bildstein, V.
AU - Colosimo, S.
AU - Cross, D. S.
AU - Demand, G. A.
AU - Finlay, P.
AU - Garnsworthy, A. B.
AU - Grinyer, G. F.
AU - Hackman, G.
AU - Jigmeddorj, B.
AU - Jolie, J.
AU - Kulp, W. D.
AU - Leach, K. G.
AU - Morton, A. C.
AU - Orce, J. N.
AU - Pearson, C. J.
AU - Phillips, A. A.
AU - Radich, A. J.
AU - Rand, E. T.
AU - Schumaker, M. A.
AU - Svensson, C. E.
AU - Sumithrarachchi, C.
AU - Triambak, S.
AU - Warr, N.
AU - Wong, J.
AU - Wood, J. L.
AU - Yates, S. W.
N1 - Publisher Copyright:
© 2020 American Physical Society. US.
PY - 2020/4
Y1 - 2020/4
N2 - From detailed spectroscopy of Cd110 and Cd112 following the β+/EC decay of In110,112 and the β- decay of Ag112, the presence of very weak decay branches from nonyrast states is revealed. In Cd112, 25+→04+ and 46+→25+ transitions are observed that yield B(E2;25+→04+)=34±15 W.u. and B(E2;46+→25+)=77±30 W.u., respectively, clearly indicating a collective structure. In Cd110, a weak decay branch from the 46+ level to the 25+ level is observed, and from a lifetime measurement following the (n,n′γ) reaction, B(E2;46+→25+)=55±14 W.u. is determined. A new branch is also observed for the decay of the 64+ level to the 46+ state, indicating that the sequence 25+, 46+, and 64+ forms part of a collective structure. The presence of 33+ and 52+ levels spaced between the previous sequence is highly suggestive of a γ band built on the 02+ shape-coexisting intruder state. The 04+ levels in Cd110,112,114 have preferred decays to the lowest 2+ members of the intruder bands, and for Cd114 a previous measurement had established an enhanced B(E2;04+→23+). The energy systematics of the 02+, 03+, and 04+ levels all display the characteristic parabolic-shaped pattern, suggesting that they are built on multiparticle-multihole proton excitations. The results are compared with beyond-mean-field calculations that reproduce qualitatively the observed levels and their decays and suggest that the 01+, 02+, 03+, and 04+ levels and the excited states built on them possess different deformations.
AB - From detailed spectroscopy of Cd110 and Cd112 following the β+/EC decay of In110,112 and the β- decay of Ag112, the presence of very weak decay branches from nonyrast states is revealed. In Cd112, 25+→04+ and 46+→25+ transitions are observed that yield B(E2;25+→04+)=34±15 W.u. and B(E2;46+→25+)=77±30 W.u., respectively, clearly indicating a collective structure. In Cd110, a weak decay branch from the 46+ level to the 25+ level is observed, and from a lifetime measurement following the (n,n′γ) reaction, B(E2;46+→25+)=55±14 W.u. is determined. A new branch is also observed for the decay of the 64+ level to the 46+ state, indicating that the sequence 25+, 46+, and 64+ forms part of a collective structure. The presence of 33+ and 52+ levels spaced between the previous sequence is highly suggestive of a γ band built on the 02+ shape-coexisting intruder state. The 04+ levels in Cd110,112,114 have preferred decays to the lowest 2+ members of the intruder bands, and for Cd114 a previous measurement had established an enhanced B(E2;04+→23+). The energy systematics of the 02+, 03+, and 04+ levels all display the characteristic parabolic-shaped pattern, suggesting that they are built on multiparticle-multihole proton excitations. The results are compared with beyond-mean-field calculations that reproduce qualitatively the observed levels and their decays and suggest that the 01+, 02+, 03+, and 04+ levels and the excited states built on them possess different deformations.
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U2 - 10.1103/PhysRevC.101.044302
DO - 10.1103/PhysRevC.101.044302
M3 - Article
AN - SCOPUS:85084971499
SN - 2469-9985
VL - 101
JO - Physical Review C
JF - Physical Review C
IS - 4
M1 - 044302
ER -