Horowitz Y S, Shahar B B, Dubi A, Pinto H
Phys Med Biol. 1977 May;22(3):500-10. doi: 10.1088/0031-9155/22/3/011.
The thermal neutron thermoluminescent response of CaF2 : Dy (TLD-200, 0-35% wt Dy) and CaF2 : mn (TLD-400, 2% wt Mn) has 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 X 0-165 X 0-83 cm dimensions. The measured integral TLD-200 response for a neutron fluence of 10(10) n cm-2 was 0-21 +/- 0-013 R of 60Co which translates to 0-33 +/- 0-021 R 60Co for a Maxwellian neutron energy distribution at T = 293-6 K. The measured integral TLD-400 response for a neutron fluence of 10(10) n cm-2 was 0-09 +/- 0-006 R 60Co which similarly translates to 0-14 +/- 0-010 R 60Co for a Maxwellian neutron energy distribution at T = 293-6 K. 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.
通过将CaF2 : Dy（TLD - 200，镝含量0 - 35%重量）和CaF2 : Mn（TLD - 400，锰含量2%重量）暴露于来自堪迪 - II衍射仪的能量为81.0毫电子伏特的单能平行中子束下，测量了它们的热中子热释光响应。热释光剂量计为矩形，尺寸为0.165×0.165×0.83厘米。对于中子注量为10¹⁰ n/cm²的情况，测量得到的TLD - 200积分响应相当于60钴的0.21±0.013伦琴，对于温度T = 293.6 K时的麦克斯韦中子能量分布，这相当于60钴的0.33±0.021伦琴。对于中子注量为10¹⁰ n/cm²的情况，测量得到的TLD - 400积分响应相当于60钴的0.09±0.006伦琴，同样对于温度T = 293.6 K时的麦克斯韦中子能量分布，这相当于60钴的0.14±0.010伦琴。理论和实验均表明，这两种材料的热释光响应均由热中子诱发的瞬发γ成分（约20%）以及由165Dy和56Mn的热中子诱发β衰变产生的主要成分组成。需要指出的是，这两种材料的热中子热释光响应与尺寸和几何形状有关。
