Brackenbush L W, Braby L A, Anderson G A
Pacific Northwest Laboratory, Richland, WA 99352, USA.
Radiat Prot Dosimetry. 1989;29(1-2):119-21.
Men and equipment in space vehicles in low earth orbit are exposed to a wide variety of radiations, but the majority of the dose is due to trapped protons, which have energies of the order of 100 MeV and are low LET particles. These high energy particles produce nuclear fragmentation with high LET secondaries that may be responsible for a significant fraction of dose equivalent. In order to understand better the biological effectiveness of this radiation environment, a portable tissue equivalent proportional counter spectrometer has been developed that automatically records the distribution of energy in a small tissue-like site as a function of time. This instrument weighs about 700 g and will be flown on a number of future space shuttle flights.
在近地轨道的航天器中的人员和设备会受到各种各样的辐射，但大部分剂量是由捕获质子造成的，这些质子能量约为100兆电子伏特，是低传能线密度粒子。这些高能粒子会产生具有高传能线密度次级粒子的核裂变，这些次级粒子可能占相当一部分剂量当量。为了更好地理解这种辐射环境的生物效应，已经开发了一种便携式组织等效正比计数器光谱仪，它可以自动记录一个小的组织样部位的能量分布随时间的变化。该仪器重约700克，将在未来的多次航天飞机飞行中搭载。
