Comment on ``La138-Ce138-Ce136 nuclear cosmochronometer of the supernova neutrino process''

Details Comment on ``La138-Ce138-Ce136 nuclear cosmochronometer of the supernova neutrino process'' Comment on ``La138-Ce138-Ce136 nuclear cosmochronometer of the supernova neutrino process''

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009phrvc..79e9801v&link_type=abstract

Physical Review C, vol. 79, Issue 5, id. 059801

Physics

Supernovae, Weak Interaction And Neutrino Induced Processes, Galactic Radioactivity, 90<=A<=149, Cosmology

Scientific paper

The nuclear cosmochronometer suggested by Hayakawa [Phys. Rev. C 77, 065802 (2008)] based on the La138-Ce138-Ce136 abundance ratio in presolar grains would be affected by the existence of a hitherto unknown low-energy 1+ state in La138. Results of a recent high-resolution study of the Ba138(He3,t) reaction under kinematics selectively populating 1+ states in La138 through Gamow-Teller transitions provides strong evidence against the existence of such a hypothetical state.

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