gas, which acts as both the neutron-capturing medium and the proportional counting gas [7, 9].

These reaction products ionize the gas inside the tube, creating an electrical pulse that can be measured to count neutron events [20, 34]. Types of Boron Counters These tubes are filled with BF3cap B cap F sub 3

A is a specialized proportional counter designed for detecting thermal neutrons . Because neutrons carry no charge, they cannot be detected directly; instead, these tubes rely on the isotope Boron-10 (