Physical Review Letters
We report the first experiments in which 5-MeV alpha particles are detected via evaporation from a bath of superfluid helium. The α excites phonons and rotons in the liquid helium, and these excitations are sufficiently energetic to evaporate helium atoms when they reach the free surface of the liquid. The approximate overall efficiency of this process has been determined, and we compare this with expectations. We have also been able to detect evaporation induced by a flux of γ’s from a 137Cs source.
Liquid helium; Solar neutrinos; Helium at low temperatures
Citation: Pilot Scholars Version (Modified MLA Style)
Bandler, S. R.; Lanou, R. E.; More, Tamar; Porter, F. S.; Seidel, G. M.; and Torii, R. H., "Particle Detection by Evaporation from Superfluid Helium" (1992). Physics Faculty Publications and Presentations. Paper 42.