CAJ | 학술논문

实验测量了自行研制的三明治电极结构化学气相沉积(CVD)金刚石薄膜探测器在室温下对241Am,243Am 与244Cm α粒子的能谱响应,得到了其α粒子响应电荷收集效率随偏压的变化关系;获得了不同偏压下其相对平均电荷收集效率及响应谱下降沿10%处的相对电荷收集效率.结果表明:所研制的CVD金刚石薄膜探测器性能稳定,对α粒子响应的电荷收集效率随偏压的增加而趋于饱和,对α粒子平均电荷收集效率达33.5%,谱下降沿10%处的电荷收集效率达57%.
실험측량료자행연제적삼명치전겁결구화학기상침적(CVD)금강석박막탐측기재실온하대241Am,243Am 여244Cm α입자적능보향응,득도료기α입자향응전하수집효솔수편압적변화관계;획득료불동편압하기상대평균전하수집효솔급향응보하강연10%처적상대전하수집효솔.결과표명:소연제적CVD금강석박막탐측기성능은정,대α입자향응적전하수집효솔수편압적증가이추우포화,대α입자평균전하수집효솔체33.5%,보하강연10%처적전하수집효솔체57%.
The energy spectrum of the developed sandwich chemical vapor deposition(CVD) diamond film detector to alpha-particles,has been measured by experiments at room temperature,for 241Am source with a characteristic energy of 5.485 MeV and 243Am and 244Cm source with characteristic energies of 5.275 MeV and 5.805 MeV respectively.The trend of the charge collection efficiency changing with biased voltage was obtained,and the mean efficiency under different biased voltages and that at 10% of the trailing edge of the spectrum were also calculated.Results show that the performance of the detector is steady,and the charge collection efficiency of the detector to alpha-particles increases with the biased voltage increasing and is saturated at a certain biased voltage.The saturated mean charge collection efficiency can be 33.5%,and can reach 57% when calculated at the 10% of the trailing edge.