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- W2029014745 startingPage "R1553" @default.
- W2029014745 abstract "The properties of ${K=0}^{+}$ excitations in deformed and transitional nuclei have recently been of intense interest. We present results of a study of the deexcitations of the lowest excited ${0}^{+}$ state in ${}^{152}$Sm from the $ensuremath{epsilon}$-decay of ${}^{152}$Eu, yielding one of the few precisely known values of the branching ratio ${R}_{0g}^{ensuremath{gamma}}{=B(E2;2}_{ensuremath{gamma}}^{+}ensuremath{rightarrow}{0}_{2}^{+}{)/B(E2;2}_{ensuremath{gamma}}^{+}ensuremath{rightarrow}{0}_{1}^{+})$ =0.048(4), which is extraordinarily small. From ${T}_{1/2}{(2}_{ensuremath{gamma}}^{+})$ we also obtain ${B(E2;2}_{ensuremath{gamma}}^{+}ensuremath{rightarrow}{0}_{2}^{+})$=0.17 W.u. Values of ${R}_{0g}^{ensuremath{gamma}}$ calculated in the interacting boson model (IBA) go to zero extremely rapidly, changing by orders of magnitude for a narrow range of parameter values. ${}^{152}$Sm is a rare case of a transitional nucleus that lands almost at the minimum. ${}^{152}$Sm and ${}^{154}$Gd are the only nuclei from $90<~N<~114$ where the $B(E2)$ values for all four transitions ${2}_{ensuremath{gamma}}^{+}ensuremath{rightarrow}{0}_{2}^{+}$, ${2}_{ensuremath{gamma}}^{+}ensuremath{rightarrow}{0}_{1}^{+}$, ${0}_{2}^{+}ensuremath{rightarrow}{2}_{1}^{+}$, and ${2}_{1}^{+}ensuremath{rightarrow}{0}_{1}^{+}$ are now known. In ${}^{152}$Sm these $B(E2)$ values span three orders of magnitude, from 144 to 0.17 W.u. and are reproduced to within a factor of 2--3 by the IBA. The rather strong ${B(E2;0}_{2}^{+}ensuremath{rightarrow}{2}_{1}^{+})$ value of 33 W.u. suggest that the ${0}_{2}^{+}$ level is an example of a good low energy $ensuremath{beta}$-vibration." @default.
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- W2029014745 date "1998-04-01" @default.
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- W2029014745 title "The first excited<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msup><mml:mrow><mml:mn>0</mml:mn></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>state in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msup><mml:mrow /><mml:mrow><mml:mn>152</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi mathvariant=normal>Sm</mml:mi></mml:math>" @default.
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- W2029014745 doi "https://doi.org/10.1103/physrevc.57.r1553" @default.
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