Journal
PHYSICAL REVIEW LETTERS
Volume 98, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.98.082501
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The Gamow-Teller strength distributions below the particle threshold in La-138 and Ta-180, deduced from high-resolution measurements of the (He-3,t) reaction at 0 degrees, allow us to evaluate the role of charged-current reactions for the production of these extremely rare nuclides in neutrino-nucleosynthesis models. The analysis suggests that essentially all La-138 in the Universe can be made that way. Neutrino nucleosynthesis also contributes significantly to the abundance of Ta-180 but the magnitude depends on the unknown branching ratio for population of the long-lived isomer.
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