Lifetime measurement in 176Lu and its astrophysical consequences

Details Lifetime measurement in 176Lu and its astrophysical consequences Lifetime measurement in 176Lu and its astrophysical consequences

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999phrvc..59..492d&link_type=abstract

Physical Review C (Nuclear Physics), Volume 59, Issue 1, January 1999, pp.492-499

Physics

Nuclear Physics

24

Lifetimes, Radiative Capture, 150<=A<=189

Scientific paper

Because of its temperature-dependent half-life, 176Lu represents an important thermometer for the slow neutron capture process (s process) which accounts for the origin of about half of the abundances between Fe and Bi. This interpretation of the observed 176Lu abundance has been improved by a new lifetime measurement of the Jπ=5- state at 838 keV in 176Lu. The present limit of τ838>=10 ps provides a more stringent constraint for the thermal equilibration between the long-lived ground state (t1/2=41 Gyr) and the short-lived K isomer at 123 keV (t1/2=3.7 h), and, hence, for the resulting estimate of the temperature during shell helium burning in red giant stars.

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