Fluorescent Response of Scintillation Crystals to Heavy Ions

The light output of CsI(Tl) was measured as a function of energy for incident ions of B¹⁰, B¹¹, C¹², N¹⁴, O¹⁶, and F¹⁹. The response of NE 102 plastic and anthracene scintillators was also measured for ions of N¹⁴ and O¹⁶, respectively. The response of CsI was essentially linear for energies above 6 Mev/A, where A is the mass number of the incident ion. The NE 102 was linear for energies above 4 Mev/A. The anthracene data showed slight curvature even at 9 Mev/A. It would appear that the response of CsI differs somewhat among crystal samples.