Lu-176 - Cosmic clock or stellar thermometer

Details Lu-176 - Cosmic clock or stellar thermometer Lu-176 - Cosmic clock or stellar thermometer

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apjs...46..295b&link_type=abstract

Astrophysical Journal Supplement Series, vol. 46, Aug. 1981, p. 295-317.

Astronomy and Astrophysics

Astrophysics

49

Absorption Cross Sections, Abundance, Lutetium Isotopes, Nuclear Capture, Nuclear Fusion, Radioactive Age Determination, Stellar Models, Stellar Temperature, Data Reduction, Hafnium Isotopes, Radioactive Decay, Thermodynamics, Ytterbium Isotopes

Scientific paper

Attention is given to the nuclear systematics of stellar nucleosynthesis for the s-only isotopes Yb-170, Lu-176 and Hf-176. An attempt is made to clarify the situation concerning the s-process synthesis of these nuclei and their relation to the development of a cosmochronometer based on Lu-176. The various stellar regimes in which the (Lu-176) - (Hf-176) decay constitutes either a cosmic clock for galactic s-process nucleosynthesis or a stellar thermometer of s-processing stellar models are discussed. The general techniques for examining the stellar synthesis of the nuclei Yb-170, Lu-176, and Hf-176 are applied to a detailed stellar model for the thermodynamic environment of the s-process.

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