Calculation of Thermal Fluence from Extremely High-Energy Emission in Air

Thermal radiation from high-energy emission event, such as nuclear explosion, is characterized by a wide energetic spectrum in air. Black body assumption for the fireball associated with this radiation serves as a reasonable approximation for interpreting the thermal radiation emission characteristics. In this study, the time-integrated thermal flux received by a target on the ground and facing a nuclear burst, was calculated as a function of yield, burst elevation, ground range, and visibility. Results of our calculations were compared with previously reported results for different conditions.