Hindered $ΔK=1$ Dipole Strength in octupole bands in $N=90$ $^{154}$Gd from Lifetime Measurements with $γ-γ$ fast timing technique

The lifetimes of the low-lying negative-parity $1^{-}$ state at 1414~keV and $2^{-}$ state at 1398~keV in $^{154}$ Gd have been measured using the $γ$ – $γ$ fast-timing technique with the VENTURE array at VECC, Kolkata. The states were populated through the $β$ decay of $^{154}$ Tb, produced in proton-induced reactions at the K130 cyclotron. From the measured lifetimes, absolute $B (E 1)$ transition strengths were deduced. The extracted $B (E 1)$ values are compared with those of neighboring Gd isotopes and with Gogny-HFB-based $s d f$ -IBM calculations. The results show that the measured $E 1$ strengths from these states are strongly hindered compared with the corresponding $Δ K = 0$ transitions, providing evidence for weak $Δ K = 1$ dipole strength in $^{154}$ Gd.

Hindered $Δ K = 1$ Dipole Strength in octupole bands in $N = 90$ $^{154}$ Gd from Lifetime Measurements with $γ - γ$ fast timing technique

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Hindered $Δ K = 1$ Dipole Strength in octupole bands in $N = 90$ $^{154}$ Gd from Lifetime Measurements with $γ - γ$ fast timing technique

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Hindered ΔK=1ΔK=1 Dipole Strength in octupole bands in N=90N=90 154154Gd from Lifetime Measurements with γ−γγ−γ fast timing technique

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Hindered ΔK=1ΔK=1 Dipole Strength in octupole bands in N=90N=90 154154Gd from Lifetime Measurements with γ−γγ−γ fast timing technique

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Hindered $Δ K = 1$ Dipole Strength in octupole bands in $N = 90$ $^{154}$ Gd from Lifetime Measurements with $γ - γ$ fast timing technique

讲解博客

AI智能校验

Hindered $Δ K = 1$ Dipole Strength in octupole bands in $N = 90$ $^{154}$ Gd from Lifetime Measurements with $γ - γ$ fast timing technique

讲解博客

AI智能校验