Measurement of the half-lives and the emission probabilities of the delayed neutrons of the isotopes 44S, 45-47Cl with the spectrometer LISE: their importance for the understanding of the isotope ratio 48Ca/46Ca in the solar system.

Details Measurement of the half-lives and the emission probabilities of the delayed neutrons of the isotopes 44S, 45-47Cl with the spectrometer LISE: their importance for the understanding of the isotope ratio 48Ca/46Ca in the solar system. Measurement of the half-lives and the emission probabilities of the delayed neutrons of the isotopes 44S, 45-47Cl with the spectrometer LISE: their importance for the understanding of the isotope ratio 48Ca/46Ca in the solar system.

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mhep.book.....s&link_type=abstract

Measurement of the half-lives and the emission probabilities of the delayed neutrons of the isotopes 44S, 45-47Cl with the spect

Astronomy and Astrophysics

Astrophysics

9

Scientific paper

After a detailed description of the simulation program LISE, experimental measurements of the radioactive decay (half-lives and neutron delayed emission probabilities) of the neutron rich nuclei 44S, 45-47Cl are presented. The comparison between these results and the theoritical predictions clearly shows that mass and deformation measurements of these nuclei are very important to determine precisely the radioactive decay parameters necessary to astrophysics. Effectively, these ones are used in star evolution models to understand the elements abundance curve of the solar system. Even if the shape of this curve is well reproduced, some anomalies subsist. The experimental results seem to show that, with the constraints they bring, a double r process in low-mass supernovae of type II can explain twice the isotopic anomalies and the shape of the elements abundance curve.

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