The substitution of a BF3 probe for the LiI crystal in neutron rem-meters.
D001895:Boron; D005459:Fluorides; D007454:Iodides; D008094:Lithium; D009502:Neutrons; D011874:Radiometry
D007454:Iodides; D008094:Lithium; D001895:Boron; D005459:Fluorides