Table 2.

Inactivation rate constants (k-values) and multi-hit target numbers (n) for Bacillus subtilis spores in water published in the scientific literature. All k-values presented have been normalized to fit an exponential decay with a shoulder model.

k-Value (cm2/mJ)	Target number (n)	Reference
0.147	7	This study (non-linear fit to multi-hit model shown in Fig. 5)
0.130	4.10	This study (linear approximation of multi-hit model)
0.304	1.85	Nedeljkovic-Davidovic [16]
0.385	2.33	Qualls and Johnson [24]
0.343	1.43	Mamane-Gravetz et al. [25]
0.237	0.81	Bohrerova et al. [26]
0.369	1.08	Bohrerova et al. [26]
0.145	1.34	Bohrerova et al. [26]
33.87	5	Deguchi et al. [27]