THERMAL NEUTRON ABSORPTION CROSSECTION
Definition
A <THERMAL NEUTRON ABSORPTION CROSSECTION> is a <Property> that is ameasure of the ability of a substance to absorb thermal neutrons. Thermal neutrons are neutrons slowed down to be in thermal equilibrium with its surroundings. The measure unit is cross-section area pr. nucleus of the substance. (barns/atom) (1 barn = 10**-24 cm2)