Response of NaI(Tl) to Energetic Heavy Ions

Abstract

The light output of NaI(Tl) was measured as a function of energy for ions of ${\mathrm{He}}^4$, ${\mathrm{B}}^{10}$, ${\mathrm{B}}^{11}$, ${\mathrm{C}}^{12}$, ${\mathrm{N}}^{14}$, ${\mathrm{O}}^{16}$, ${\mathrm{F}}^{19}$, and ${\mathrm{Ne}}^{20}$ from approximately 1.0 to 10.0 Mev/nucleon. The particle energy was varied with absorbing foils and the degraded beam analyzed in a magnetic spectrometer. Light output becomes linear with energy above approximately 6 Mev/amu. There appears to be an odd-even incident charge effect in the saturation value of the differential efficiency of fluorescence, $\frac{\mathrm{dL}}{\mathrm{dE}}$.