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. 

Beers Yardley F1

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Beers Yardley F1

Credit line: 
AIP Emilio Segrè Visual Archives

L-R Yardley Beers and Samuel Weisbaum work with the first spectrometer of the Low Frequency Absorption project at New York University. This employed 20 feet of 'S-band' Waveguide with Stark Electrode. This was the first used to study spectrum of HDO (see Weisbaum, Beers, and Herrmann - Journal Chemistry Physics 23, 1601 1955), and it was used with many of the experiments which followed. This spectrometer was used to frequencies as low as 300 MHz by using the Stark electrode as a r. f. conducter (i.e., the cell became a coax transmission line).

Photo date: 
Original format: 
2 photographic print (black and white; 6 x 8.5, 6 x 4.5 inches)
Beers, Yardley, 1913-