Emilio Segrè Visual Archives

More than 30,000 photos of scientists and their work

Gehman Samuel F1

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Gehman Samuel F1

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Image title: 
Gehman Tests Tire Tread Hardness
Credit line: 
AIP Emilio Segrè Visual Archives

Samuel Gehman testing tire tread hardness following exposure of the tire to intense gamma ray radiation. Cobalt 60, source of radiation, is raided from bottom of 17 foot well into alumium housing in center of tire when irradiation experiments are to be conducted. Window at upper left is 36 inches thick, made of optically polished high density glass and permits scientists to see into irradiation chamber or "cave" while various materials are subjected to radiation.

Photo date: 
Original format: 
1 photographic print (black and white; 10 x 8.25 inches)
Gehman, S. D. (Samuel Dwight)