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- W1982034263 abstract "High-spin states populated in the decay of microsecond isomers in the transitional nuclei $^{121}mathrm{Sb}$ and $^{123}mathrm{Sb}$ have been investigated in detail in several experiments using $ensuremath{gamma}$-ray and electron spectroscopy. The nuclei were formed using multinucleon transfer and fusion-fission reactions with $^{136}mathrm{Xe}$ beams and also using the $^{120}mathrm{Sn}(^{7}mathrm{Li},ensuremath{alpha}2n)^{121}mathrm{Sb}$ and $^{122}mathrm{Sn}(^{7}mathrm{Li},ensuremath{alpha}2n)^{123}mathrm{Sb}$ incomplete-fusion reactions. Isomeric half-lives ranging from several nanoseconds to a few hundred microseconds were determined by means of conventional decay curve analyses, whereas very short-lived isomers (${T}_{1/2}~1$ ns) were identified using the generalized centroid-shift method. A number of new transitions were observed, including a branch through spherical states from the $19/{2}^{+}$ member of the $9/{2}^{+}$ deformed band in $^{121}mathrm{Sb}$, in competition with the main decay path through the rotational band. This is attributed to mixing between the $19/{2}^{+}$ band member and a $19/{2}^{+}$ spherical state. Both levels are predicted to coincide approximately in energy in $^{121}mathrm{Sb}$. The fact that a $25/{2}^{+}$ isomer occurs for $A=121$ and the lighter isotopes, while a $23/{2}^{+}$ isomer is observed for $A=123text{ensuremath{-}}131$ is explained through a multistate mixing calculation, taking into account the gradual shift of the $2{d}_{5/2}$ and $1{g}_{7/2}$ proton orbitals and the change in proton-neutron effective interactions from an attractive particle-particle type in the lower part of the shell to a repulsive particle-hole type with increasing the neutron number toward the $N=82$ shell closure. The observed enhancement of the $B(E2;19/{2}^{ensuremath{-}}ensuremath{rightarrow}15/{2}^{ensuremath{-}})$ values in $^{121}mathrm{Sb}$ and $^{123}mathrm{Sb}$ over the $B(E2;{7}^{ensuremath{-}}ensuremath{rightarrow}{5}^{ensuremath{-}})$ values in the corresponding Sn cores is discussed in terms of configuration mixing between spherical and deformed states." @default.
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- W1982034263 date "2009-02-09" @default.
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- W1982034263 title "Decay properties of high-spin isomers and other structures in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mmultiscripts><mml:mi mathvariant=normal>Sb</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>121</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>and<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mmultiscripts><mml:mi mathvariant=normal>Sb</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>123</mml:mn></mml…" @default.
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- W1982034263 doi "https://doi.org/10.1103/physrevc.79.024306" @default.
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