用于低能α探测的混合望远镜探测器的特性
The characterization of a hybrid telescope detector for low energy alpha detection
摘要：
为了探测5 ~ 1 MeV的低能$α$粒子，研制了一种由气体透射探测器（$Δ$ E）和固体截止探测器（E）组成的混合${\it telescope}$。该探测器是为研究（p. $α$）反应的α激发函数而研制的。气体电离室在轴向场模式下工作，测量微分能量损失（$Δ$ E），而剩余能量由硅探测器测量。粒子识别通过实施$Δ$ E-E技术来实现。作为望远镜的探测器的最佳灵敏度已被研究到0.89 MeV的最低能量值的$α$ -粒子与适当的组合的电场和压力或E/p值的电离区域。
英文摘要：
Characterization of a hybrid ${\it telescope}$ with gas transmission detector ($Δ$E) and a solid-state stop detector (E) has been fabricated for detection of low energy $α$ particles between 5 to 1 MeV. The detector is developed for utilization in the study of alpha excitation function in (p.$α$) reaction. The gas ionization chamber, operated in axial field mode, measures the differential energy loss ($Δ$E), while the residual energies are measured by silicon detector. Particle identification is realized by implementing the $Δ$E-E technique. The optimum sensitivity of the detector as a telescope has been studied down to the lowest energy value of 0.89 MeV $α$-particles with a suitable combination of electric field and pressure or E/p value in the ionization region.
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