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Nuclear Chronologies for the Galaxy

Wasserburg, G. J. and Schramm, David N. and Huneke, J. C. (1969) Nuclear Chronologies for the Galaxy. Astrophysical Journal, 157 . L91-L96. ISSN 0004-637X. doi:10.1086/180393.

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The ratios U²³⁵/U²³⁸, Th²³²/U²³⁸, Pu²⁴⁴/U²³⁸, and I¹²⁹/I¹²⁷ have been used to obtain self-consistent solutions for the time evolution of r-process nuclei. Using Pu²⁴⁴/U²³⁸ = 1/30, the solutions all have a large amount of initial production, with a duration of from 0 to 10¹⁰ years, followed by a relatively quiescent period (~3 X 10⁹ years) terminated by a nucleosynthetic event that possibly initiated the separation of the solar system. For values of Pu²⁴⁴ less than 1/60 models of uniform synthesis terminated by a sharp nucleosynthetic event are possible.

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Wasserburg, G. J.0000-0002-7957-8029
Additional Information:© 1969 American Astronomical Society. Provided by the NASA Astrophysics Data System. We wish to thank our colleagues D. S. Burnett, W. A. Fowler, J. L. Greenstein, Maarten Schmidt, R. F. Christy, P. J. E. Peebles, and J. W. Truran for their enthusiastic interest in our work. We have profited greatly from discussion with all of them. This work was supported by National Science Foundation grants GP9433 and 9114. One of us (D. N. S.) was supported by an NDEA Fellowship.
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NSFGP 9433
NSFGP 9114
National Defense Education ActUNSPECIFIED
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Caltech Division of Geological Sciences1643
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ID Code:115204
Deposited By: Tony Diaz
Deposited On:17 Jun 2022 19:30
Last Modified:17 Jun 2022 19:30

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