Study on cosmic radiation environment in lower atmosphere by high-energy neutron measurement

点击翻译按钮获取中文摘要

Measurements of energy spectra of high energy cosmic-ray origin neutron (10-200 MeV) have been carried out using a phoswich-type scintillation detector at the various geographical latitudes or altitudes in Japan. The measured peak that appeared in 100 MeV was sharper than a calculated value, namely, we succeeded in the measurement more high-resolution than a multi-moderator spectrometer with. The new method of high energy neutron energy spectrum measurement using the phoswich-type scintillation detector adopted in this work was able to catch qualitatively the latitude and altitude dependence of the cosmic-ray origin neutron energy spectra though quantitative differences have been existed between measured values and calculated values.