一种使用热释电探测器的新型辐射剂量计。

A new radiation dosimeter using a pyroelectric detector.

作者信息

de Paula M H, Carvalho A A, Mascarenhas S, Zimmerman R L

出版信息

Med Phys. 1984 Nov-Dec;11(6):866-8. doi: 10.1118/1.595587.

Abstract

We describe a new type of radiation dosimeter, for the diagnostic x-ray region, using a pyroelectric detector. It consists of a PZT ceramic crystal thick enough to absorb all the incident radiation at 33 keV. This pyroelectric radiation dosimeter (PERD) produces an electrical signal when exposed to a chopped beam of x-ray photons. The PERD is basically a microcalorimeter. It has the following characteristics: (1) it responds linearly to the energy fluence rate of the radiation; (2) it responds linearly to the radiation intensity for a given radiation spectrum; (3) it has excellent stability; (4) it is simple to construct and inexpensive; and (5) it is rugged.

摘要

我们描述了一种用于诊断X射线区域的新型辐射剂量计，它使用热释电探测器。它由一块足够厚的PZT陶瓷晶体组成，能够吸收33keV的所有入射辐射。这种热释电辐射剂量计（PERD）在暴露于斩波X射线光子束时会产生电信号。PERD本质上是一种微热量计。它具有以下特点：（1）对辐射的能量注量率呈线性响应；（2）对于给定的辐射光谱，对辐射强度呈线性响应；（3）具有出色的稳定性；（4）构造简单且成本低廉；（5）坚固耐用。