TABLE 5.

Gamma-ray protection factors for suppressing neutron-induced micronuclei among human lymphocytes irradiated in vitro

Neutrons	Radiation Dose mGy	Gamma-Ray Contribution to the Dose mGy	Total Cells	Cells Without Micro-nuclei	Observed Micro-nucleated Cells	Expected Micro-nucleated Cells	Chi Square	p-value	Protective (Hormetic) Effect of Gamma Rays Implicated	Gamma- Ray Protection Factor PROFAC
Reference	10	0.1	20909	20595	314	314
1.5-MeV	10	0.2	9769	9709	60	147	52	5.478E–13	yes	0.59
5.9-MeV	10	0.6	13730	13631	99	206	57	5.415E–14	yes	0.52
13.7-MeV	10	0.6	9833	9794	39	148	81	2.054E–19	yes	0.74
Reference	50	0.5	20622	20293	329	329
1.5-MeV	50	1	9827	9727	100	157	21	4.85E–06	yes	0.36
5.9-MeV	50	3	12787	12649	138	204	22	3.188E–06	yes	0.32
13.7-MeV	50	3	8150	8110	40	130	63	1.74E–15	yes	0.69
Reference	100	1	21369	20940	429	429
1.5-MeV	100	2	9873	9717	156	198	9.2	0.0024569	yes	0.21
5.9-MeV	100	6	10526	10364	162	211	12	0.0006098	yes	0.23
13.7-MeV	100	6	9997	9904	93	201	59	1.596E–14	yes	0.54