Linear Relationship for Heavy-Ion Pulse Heights in Alkali Halides

It has been found that the total scintillation light from alkali halides produced by stopping energetic ions with $2<Z<\mathrm{}20\mathrm{}$ can be described by a single linear function of $\frac{{E_0}^{\frac{3}{2}}}{A^{\frac{1}{2}}{Z}^{\frac{2}{3}}}$, where $E_0$ is the initial energy, and $A$ and $Z$ are the mass number and charge of the incident particle, respectively. Measurements in CsI(Tl) and NaI(Tl) are shown and a brief discussion of the implications of this observation is given.