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. 

Bromley David Allan F5

Share This


Bromley David Allan F5

David Allan Bromley
Image title: 
Bromley Adjusting Neutron Threshold Detection Apparatus
Credit line: 
AIP Emilio Segrè Visual Archives, Bromley Collection

Caption courtesy D. Allan Bromley: "Allan Bromley adjusting the neutron threshold detection apparatus that had been transported from Chalk River to the High Voltage Engineering factory in Burlington, Massachusetts, where the world's first tandem accelerator was under construction. These neutron threshold measurements were designed to provide absolute energy calibration for the tandem accelerator beam; these were the first measurements ever carried out with a tandem accelerator with proton beam ranging up to 10 MeV."

Original format: 
1 photographic print (black and white; 9.5 x 7.5 inches)
Bromley, D. Allan (David Allan), 1926-2005