CXII. Electron and gamma ray spectroscopy with scintillation detectors

Abstract

An account is given of β- and γ-ray energy measurements. Various coincidence techniques appropriate to scintillation detectors are examined experimentally, and an investigation is made of the application of a single crystal, with source buried inside, to the elucidation and closer examination of decay schemes. Work is described on standard sources, on Hg²⁰³, and in some detail on La¹⁴⁰. New information is given for La¹⁴⁰ concerning the 0·093 γ-ray, the high energy γ-ray and the decay scheme.