Low-LET Microbeam Dosimetry

Dosimetry calculations supporting the design and operation of several low-LET irradiation facilities are continuing. The computations involve event-by-event, detailed-histories Monte Carlo simulations of low energy electrons and soft x-rays interacting in low-Z homogeneous media. The spatial dependence of hit frequency and the distribution in specific-energy are computed; from these data, and knowing the cellular structure, one can then estimate the mean dose deposited in targeted mono-layers and escaping to neighbors.