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Abstract
The normal component in gas-filled neutron detectors was for many years boron trifluoride, BF3, but in recent years 3He has become the converter gas of choice. Although 3He is expensive (about €90 per liter), it is a better proportional counter gas, particularly with respect to electron multiplication, and has a higher conversion efficiency per molecule than BF3
Notes
12. S.A. McElhaney and R.I. Vandermolen, Two-dimensional position-sensitive detectors for small-angle neutron scattering. Oak Ridge National Laboratory Report ORNL/TM-11557 (1990).
14. B. Guerard. This issue.