Range-Energy Relations for Alpha-Particles and Deuterons in the Kodak NTB Emulsion

Abstract

Range‐energy relations for alpha‐particles (3–18 Mev) and deuterons (2–9 Mev) in the Kodak NTB emulsion have been determined. Natural alpha‐emitters and particles accelerated in the Purdue University cyclotron were used. Cameras for use with the cyclotron and with Po and Th sources are described. In the energy interval investigated the ranges in the NTB emulsion are practically identical with those found in the Ilford B1 and C2 emulsions. They agree also with the ranges previously reported in dry Kodak NTA emulsion but are as much as 10 percent shorter than those reported for the latter emulsion when exposed under ``ordinary'' humidity conditions.