Photoexcitation of 3.7 h 176Lum and its astrophysical consequences.

Details Photoexcitation of 3.7 h 176Lum and its astrophysical consequences. Photoexcitation of 3.7 h 176Lum and its astrophysical consequences.

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990acphh..69..169l&link_type=abstract

Acta Phys. Hung., Vol. 69, No. 3/4, p. 169 - 178

Physics

6

Nucleosynthesis: Stellar Interiors

Scientific paper

Gamma-induced excitation of the 3.7 h half-life 176Lum was studied by high activity 60Co and 24Na γ-sources as well as bremsstrahlung from a 4 MeV electron linear accelerator. Photoactivation exhibited a steep rise in the energy region concerned, from 1.17 to 4 MeV. Observed abundance of the 3.6×1010y half-life 176Lu was proposed to be used for determining the age of the neutron capture s-process in stellar nucleosynthesis. However, the situation is complicated by the β-radioactivity of the isomer. Photoactivation may reduce drastically the half-life in the stellar interior, so that it would reach the half-life of the isomer at 3.5×108K temperature, guaranteeing thermal equilibrium between ground and isomeric states. This makes 176Lu unreliable as a cosmic chronometer.

Affiliated with

Also associated with

No associations

Rating

Photoexcitation of 3.7 h 176Lum and its astrophysical consequences. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Photoexcitation of 3.7 h 176Lum and its astrophysical consequences., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photoexcitation of 3.7 h 176Lum and its astrophysical consequences. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-838899