boron chamber

English Thesaurus

1. an ionization chamber lined with boron or filled with boron trifluoride gas for counting low velocity neutrons (noun.artifact)

hypernym	:	ionization chamber, ionization tube,
definition	:	a measuring instrument that measures the amount of ionizing radiation (noun.artifact)

part meronym	:	boron counter tube,
definition	:	a proportional counter tube for counting neutrons (noun.artifact)