论文部分内容阅读
用烧结法制备的新型磷光体Li_2B_4O_7:Cu(重量比0.03%)有效原子序数为7.3,接近组织等效.该磷光体对于热释光剂量计具有良好的性能.它有两个发光峰,即在205℃的剂量主峰和在120℃的肩峰,并有一个较宽的发光谱带,其峰值为368nm.它还具有良好的抗湿性能.其剂量学特性如下: (1)对γ射线的灵敏度比用常规的(火鬲)熔法制备的Li_2B_4O_7:Mn高20倍. (2)25℃下,在黑暗中放置60天,其205℃的剂量峰值衰退小于9%. (3)对小于10~5伦的照射,其热释光输出是线性的,超过10~5伦后呈亚线性.
The new phosphor Li 2 B 4 O 7: Cu (0.03% by weight) prepared by sintering has an effective atomic number of 7.3, which is close to that of the tissue. The phosphor has good performance for the thermoluminescence dosimeter. It has two luminescence peaks The main peak at 205 ° C and the shoulder at 120 ° C, and a broad band with a peak at 368 nm. It also has good moisture resistance and its dosimetric properties are as follows: (1) Is 20 times more sensitive than Li 2 B 4 O 7: Mn prepared by the conventional pyrolytic melting method. (2) The peak decay at 205 ° C is less than 9% at 60 ° C for 60 days at 25 ° C. (3) Less than 10 to 5 Lun exposure, the thermoluminescence output is linear, more than 10 to 5 Lun was sub-linear.