James Arnold Crowther (1883–1950) was a British physicist who worked on beta particle scattering with JJ Thomson in connection with the first tests of modern atomic physics (see plum pudding model) as well as X-ray scattering including practical applications in medical radiology.
[3] In this work Crowther measured the intensity of radiation from uranium as it passed through various material like mica, cardboard, and especially a series of metal foils.
Crowther continued this work as Mackinnon Student of the Royal Society and then as Fellow of St. John's through 1924.
[4] During the First World War, Crowther collaborated with Alfred Robb to run one of the first diagnostic X-ray labs, at Addenbrooke's Hospital in Cambridge.
During this time, he wrote his popular and influential book Ions, Electrons and Ionising Radiations.