Some characteristics of gamma production in π- emulsion interactions at 50 GeV/c

Some characteristics of gamma production have been studied in nuclear emulsions subjected to a magnetic field of strength 180 KG during exposure to a π- beam of momentum 50 GeV/c. The gammas are selected from a very narrow forward cone (theta sub(L) <= 100) in the laboratory system. The energy of the gamma rays are measured by using magnetic bending property of tracks and also by the usual coordinate methods. The average energy carried off by gammas and the average values of the longitudinal and transverse components and their moments have been estimated. The gamma momentum spectrum has also been studied in the ππ and πN CM systems. The experimental results are fairly well explained in terms of isobar productions as well as diffraction dissociation processes. (author)