Abstract
Inducement of color to optical glass by irradiation is used to measure neutron exposure dose from total exposure dose of gamma-rays and neutrons emitted from Ra-Be source by determining first the shade of induced color by gamma-ray irradiation alone. Two kinds of optical glass, borosilicate crown glass (BK-7) and flint glass (F-2), are used. A linear relation is found between neutron exposure dose and shade of the induced color. BK-7 glass can be used for measuring higher dose than F-2 glass.