Composition of reactor radiation—statistically significant radiation damage factor of diamond

1. A computer program implementing a stepwise procedure for analyzing multidimensional regressions has been perfected. Multidimensional regressions on a sample of sizen=15 was analyzed in order to find the best subset of independent variables for purposes of prediciting the radiation damage to diamond during irradiation in a reactor. Three functions with participation of the γ-ray flux density are also included in the model as regressors, in addition to the traditional fastneutron fluence and irradiation temperature. It was established that a collection of three conditions of irradiation gives the best predictions: fast-neutron fluence, irradiation temperature, and radiation composition factor. 2. It was shown that the effectiveness of the irradiation temperature, fast-neutron fluence, and radiation composition factor at the center of the array of independent variables is in the ratio 0.7, 0.35, and 0.617.