New estimate for the time-dependent thermal nucleosynthesis of ${}^{180}$Ta${}^m$

Abstract

We have made a new time-dependent calculation of the supernova production ratio of the long-lived isomeric state of ${}^{180}$Ta. Such a time-dependent solution is crucial for understanding the production and survival of this isotope. We include the explicit linking between the isomer and all known excited states.We have also calculated the properties of possible links to a conjectured excited state that might decrease the final isomer residual ratio. We find that the explicit time evolution of the synthesis of ${}^{180}$Ta using the available nuclear data avoids the overproduction relative to ${}^{138}$La for a $\nu$-process neutrino temperature of 4 MeV.

Published in Phys. Rev. C, 13 pages, 4 figures

References in corpus (3)

• Supernova Neutrino Nucleosynthesis of Light Elements with Neutrino Oscillations
• Survival of Nature's Rarest Isotope 180Ta under Stellar Conditions
• 138La-138Ce-136Ce nuclear cosmochronometer of supernova neutrino process

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• 11B and Constraints on Neutrino Oscillations and Spectra from Neutrino Nucleosynthesis
• Neutrino Magnetic Moment, CP Violation and Flavor Oscillations in Matter
• Comprehensive Analyses of the Neutrino-Process in the Core-collapsing Supernova
• Nuclear Weak Rates and Nuclear Weak Processes in Stars
• Modification of nuclear transitions in stellar plasma by electronic processes: K-isomers in 176Lu and 180Ta under s-process conditions
• Progress in Nuclear Astrophysics of East and Southeast Asia
• Neutrino-induced reactions on 18O and implications of 18O mixture in water Cherenkov detectors on supernova neutrino events
• Neutrinos and Heavy Element Nucleosynthesis
• Photo-nuclear reaction rates of ${}^{157,159}$Ho and ${}^{163,165}$Tm and their impact in the $\gamma$--process
• ${}^{179}$Ta(n,$\gamma$) cross-section measurement and the astrophysical origin of ${}^{180}$Ta isotope