Abstract
The depopulation of the quasistable isomer in Ta-180 with J(pi) = 9(-)
at E-x = 75 keV by resonant photoabsorption was investigated with
intense bremsstrahlung. The results indicate a dramatic acceleration of
the isomer decay to the short-lived J(pi) = 1(+) ground state under
stellar s-process conditions. The consequences for a possible
nucleosynthesis of nature's rarest isotope Ta-180. within the s process
are discussed.
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