John Caunt Scientific

Catalogue Number / Material		water (reference)	JC215 Lithium - Poly	JC227 Borated Flex / Panel	JC237 Boro-Silicon	JC238 Flex / Boron	JC259 Poly / Cast	JC261 Neutron / Putty
Additive Atoms Density atoms/cc		hydrogen 6.69 x 10²²	lithium 6.7 x 10²¹(7.5% wt) hydrogen 5.44 x 10²²	boron 5.8 x 10²¹ (9% wt) hydrogen 4.63 x 10²²	boron 9.4 x 10²⁰ (1.06% wt) hydrogen 4.49 x 10²²	boron 2.32 x 10²² (25.3% wt) hydrogen 2.7 x 10²²	boron 5.8 x 10²⁰ (0.9% wi) hydrogen 7.1 x 10²²	boron 6.1 x 10²¹ (10% wt) hydrogen 5.9 x 10²²
Mass Density g/cc		1.00	1.06	1.16	1.59	1.64	1.15	1.10
Thermalize One-Tenth Thickness 2.0 MeV Neutrons (inches)		1.58	1.64	1.80	1.39	1.38	1.24	1.59
Attenuate One-Tenth Thickness Thermal Neutrons (inches)		41.08	1.78	0.26	1.25	0.05	1.97	0.20
Attenuate One-Tenth Thickness 1.02 MeV Gammas (inches)		17.95	12.64	11.71	8.71	8.71	11.65	12.11
Shielding Effectiveness	Thermel Neutron	poor	fair	excellent	fair	excellent	fair	good
	Fast Neutron	excellent	good	fair	good	fair	excel Isnt	good
	Gamma	poor	poor	fair	fair	fair	poor	poor
	Capture Gamma	poor	excellent	excellent	good	excellent	good	good