The ionization produced in nuclear emulsion by very relativistic particles
Hanson, Harlan D.
Seng, William R.
Weidman, Russell H.
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In order to determine the shape of the ionization curve in nuclear emulsions at values of ϒ˃100, we have measured the blob density of relativistic electron tracks. The pv of the pair produced electrons used was determined by multiple scattering. A total of 84.45 centimeters of electron track was blob taunted and scattered. From ϒ = 100 to ϒ = 5400 the data were combined into 14 points each with a statistical uncertainty on blob density of less than 1%. These points indicate a level "plateau" and show no deviation from this plateau within our statistical accuracy. Pions were used to estimate the minimum of the ionization curve 5 and ratio of blob density plateau to blob density minimum is estimated to be 1.140 ± .020.
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