Philip A. Seeger and Donald Clayton outside Seeger's Los Alamos home in December 1967 following a snowstorm. Clayton was preparing to present a colloquium there on heavy-element nucleosynthesis. Seeger and Clayton were friends from graduate school in Kellogg Radiation Lab at Caltech in the 1960s. Their 1965 paper with Fowler (ApJ Suppl, 11, 121-166 (1965)) presented the first dynamical formulation of the r process of rapid neutron capture, which guided all subsequent work on the r process. That paper also contained the first evaluations of an exponential distribution of neutron fluxes in the s process. Other photos of Seeger and Clayton can be found in 1959 Kellogg Lab, in 1982 Neutron 50th, and 1995 Fowler Memorial.
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