# Radiative lifetime and energy of the low-energy isomeric level in $^{229}$Th

@article{Tkalya2015RadiativeLA,
title={Radiative lifetime and energy of the low-energy isomeric level in \$^\{229\}\$Th},
author={E V Tkalya and Christian Schneider and J. Jeet and Eric R. Hudson},
journal={Physical Review C},
year={2015},
volume={92},
pages={054324}
}
• Published 30 September 2015
• Physics
• Physical Review C
We estimate the range of the radiative lifetime and energy of the anomalous, low-energy $3/{2}^{+}(7.8\ifmmode\pm\else\textpm\fi{}0.5$ eV) state in the $^{229}\mathrm{Th}$ nucleus. Our phenomenological calculations are based on the available experimental data for the intensities of $M1$ and $E2$ transitions between excited levels of the $^{229}\mathrm{Th}$ nucleus in the ${K}^{\ensuremath{\pi}}[N{n}_{Z}\mathrm{\ensuremath{\Lambda}}]=5/{2}^{+}[633]$ and $3/{2}^{+}[631]$ rotational bands. We also…

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