Doubly stochastic Poisson processes in EMARG with detection of. beta. particles and internal-conversion electrons emitted from a surface

The form of the counting statistics is determined for detection of ..beta.. particles and internal-conversion electrons by a nuclear emulsion. It is shown experimentally for the first time that photographic detection of ..beta.. particles and internal-conversion electrons obeys a Neyman type-A distribution, and not a Poisson distribution as was previously assumed.