The interpretation of solar system abundances at the N = 50 neutron shell

Details The interpretation of solar system abundances at the N = 50 neutron shell The interpretation of solar system abundances at the N = 50 neutron shell

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...228..253b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 228, no. 1, Feb. 1990, p. 253-259.

Astronomy and Astrophysics

Astrophysics

1

Abundance, Chondrites, Neutrons, Nuclear Astrophysics, Solar System, Decomposition, Neutron Cross Sections, Nuclear Fusion

Scientific paper

New data on CI chondrite abundances demonstrate a high degree of smoothness for the A = 75 - 100 mass range for odd A nuclei, except a single element peak at K ascribable to the s-process peak for the N = 50 neutron shell. Literature estimates of s-process abundances, Ns, permit a smooth Ns curve to be drawn; however the resultant 'non-s' abundance curve (nominally r-process) does not show a peak analogous to peaks associated with the N = 82 or 126 shells. Assuming the systematics of the r-process even and odd A abundance peaks at the N = 82 and 126 shells apply to N = 50, the odd A r-process peak for N = 50 can be obtained, which in turn permits a new calculation of Ns for odd A.

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