Sublinear response of peak 5 in LiF:Mg,Ti to low energy protons and carbon ions

✍ Scribed by M. Rodrı́guez-Villafuerte; H. Alva-Sánchez; O. Ávila; A.E. Buenfil; O.O. Galván; I. Gamboa-deBuen; C.G. Ruiz; M.E. Brandan

• Book ID: 104068355
• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 456 KB
• Volume: 226
• Category: Article
• ISSN: 0168-583X
• DOI: 10.1016/j.nimb.2004.06.024

✦ Synopsis

This work analyses experimentally and mathematically the heavy charged particle (HCP) thermoluminescence (TL) fluence response of sensitised LiF:Mg,Ti (TLD-100) peak 5 to 0.91, 2.95 and 4.32 MeV protons and 10.3 and 11.8 MeV carbon ions. Supralinearity was suppressed by sensitising the TLD-100 chips following a pre-exposure/annealing treatment. HCP irradiations took place using a Pelletron accelerator at fluences that ranged from about 6 • 10 8 to 3 • 10 11 cm À2 and from 3 • 10 7 to 1 • 10 11 cm À2 for protons and carbons, respectively. Results were compared to a Monte Carlo simulation of the Extended Track Interaction Model (ETIM) performed for each particle-energy combination. Experimental data show that the onset and behaviour of the HCP-TL fluence response function is weakly energy dependent for each ion type, in agreement with previously reported data of sensitised TLD-100 irradiated with low energy helium ions. ETIM fails to predict this behaviour showing instead a strong energy dependence of the simulated HCP-TL fluence response function.