Study of First-Order Phase Changes in a Number of Organic Crystals

Abstract

The change in the long lifetime τ₂ for positron annihilation has been measured as a function of temperature for benzene, diphenylamine, cyclohexane, naphthalene, N‐phenylbenzylamine, p‐bromotoluene, and phenol. In each case, the temperature range covered a first‐order phase transition.