Table 1.

Calculation of mean number of hits per nucleus and cells with 0, 1, or 2 hits according to the Poisson distribution, based on the nuclear area (HMVEC) = 200 µm² and LET (He) = 76 keV/µm.

Dose (Gy)	Fluence (p/cm2)	Mean number of hits/nucleus	Cells with 0 hit
0.1	8.21 × 105	1.6	0.2
0.5	4.11 × 106	8.2	2.7 × 10−4
1	8.21 × 106	16.5	7.1 × 10−8
2	1.64 × 107	32.9	5.1 × 10−15