The thermal neutron thermoluminescence response of CaF2:Dy (TLD-200, 0.35% wt Dy) and CaF2:Mn (TLD-400, 2% wt mn) have been measured by exposure to a monoenergetic, parallel beam of 81.0 MeV neutrons from a Kandi-II diffractometer. The TL dosemeters were rectangular and of 0.165*0.165*0-83 cm dimensions. The thermoluminescent response of both materials is both theoretically and experimentally shown to be composed of a thermal neutron induced prompt gamma component (approximately 20%) as well as the major component due to the thermal neutron induced beta decay of 165Dy and 56Mn. It is pointed out that the thermal neutron thermoluminescent response of both materials is size and geometry dependent.
ASJC Scopus subject areas
- Radiological and Ultrasound Technology
- Radiology Nuclear Medicine and imaging