Double beta coincidence spectrometer

Abstract

The analysis of the coincidence method using a coincidence beta spectrometer shows us that this instrument must fulfil the following conditions: 1) Independent energy measurement in the counterspectrometer systems. 2) Big gathering power and good resolving power in the counter-spectrometer systems. 3) Posibility of reducing to a negligeable value with absorbing materials, the counts produced by gamma rays. 4) Optimum location of the counters to make the cosmic-rays coincidence counts negligeable. 5) Counter outside of the magnetic field.