. . . "boron chamber"@en-us . . "boron chamber"^^ . "an ionization chamber lined with boron or filled with boron trifluoride gas for counting low velocity neutrons"@en-us . "102773982"@en-us . "0.375"^^ . "0"^^ . . "102875626"^^ . "02875626-n"^^ . "102317909"@en-us . . . . .