Table 1.

Ratios of D₁₀ doses for CHO wild-type and xrs5 cells exposed to various radiations

Radiation	LET keV/μm	(A) D10 of CHO10B2	(B) D10 of xrs5	Ratio (A)/(B)
Gamma rays	0.3	6.37 Gy	1.18 Gy	5.40
Proton Mono	1.1	5.31Gy	1.16 Gy	4.58
Carbon Mono	13	3.79 Gy	0.91 Gy	4.16
Carbon SOBP	50	3.16 Gy	1.05 Gy	3.01
Carbon Mono	70	2.49 Gy	0.94 Gy	2.65
Iron Mono	200	1.89 Gy	1.00 Gy	1.89
64Cu-ATSM	NA	0.97 Bq/cell	0.40 Bq/cell	2.43