Emilio Segrè Visual Archives

More than 30,000 photos of scientists and their work

Attention ESVA Patrons:

The Emilio Segrè Visual Archives’ site is moving soon and adopting an open access approach to digital image sharing. Once we have transitioned to the new site in 2021, we will no longer charge for our high-resolution digital images or usage fees (note that we do not hold copyright to all the images in our collections and you will still need to obtain permission for those which we do not own).

If you are working on a long-term project, we advise you to wait until the migration is complete so that you may obtain our copies for free. If you cannot wait, email us at nbl [at] aip.org and we will do what we can to assist you. We will not be offering refunds for past purchases.

For more information, please visit our FAQ page on the Ex Libris Universum blog. 

Clayton Donald C73

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Clayton Donald C73

Donald D. Clayton
Image title: 
Clayton and Gallino Converse
Credit line: 
AIP Emilio Segrè Visual Archives, Clayton Collection

Donald D. Clayton, Clemson University (left) discusses with Roberto Gallino, Torino Italy (right), the modern theory for neutron capture nucleosynthesis in AGB stars. (plus two unidentified onlookers). Gallino became a pioneer for the modern models of the s process in AGB stars, and Clayton was originator at Caltech (1961) of the time-dependent s process theory. Photo taken at the Institute for Nuclear Theory Program on campus of University of Washington in Seattle.

Photo date: 
July 16, 2004
Original format: 
1 digital image (RGB, 193 KB)
Clayton, Donald D.
Gallino, Roberto