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Title: Particle detection by evaporation from superfluid helium

Abstract

We report the first experiments in which 5-MeV alpha particles are detected via evaporation from a bath of superfluid helium. The {alpha} 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 {gamma}'s from a {sup 137}Cs source.

Authors:
; ; ; ; ; ;  [1]
  1. Department of Physics, Brown University, Providence, Rhode Island 02912 (United States)
Publication Date:
OSTI Identifier:
7236930
DOE Contract Number:  
FG02-88ER40452
Resource Type:
Journal Article
Journal Name:
Physical Review Letters; (United States)
Additional Journal Information:
Journal Volume: 68:16; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ALPHA DETECTION; COMPTON EFFECT; EVAPORATION; EXPERIMENTAL DATA; GAMMA DETECTION; HELIUM 4; NEUTRINOS; PARTICLE IDENTIFICATION; ROTONS; SUPERFLUIDITY; TEMPERATURE RANGE 0000-0013 K; BASIC INTERACTIONS; CHARGED PARTICLE DETECTION; DATA; DETECTION; ELASTIC SCATTERING; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; EVEN-EVEN NUCLEI; FERMIONS; HELIUM ISOTOPES; INFORMATION; INTERACTIONS; ISOTOPES; LEPTONS; LIGHT NUCLEI; MASSLESS PARTICLES; NUCLEI; NUMERICAL DATA; PHASE TRANSFORMATIONS; QUASI PARTICLES; RADIATION DETECTION; SCATTERING; STABLE ISOTOPES; TEMPERATURE RANGE; 440103* - Radiation Instrumentation- Nuclear Spectroscopic Instrumentation; 440104 - Radiation Instrumentation- High Energy Physics Instrumentation

Citation Formats

Bandler, S R, Lanou, R E, Maris, H J, More, T, Porter, F S, Seidel, G M, and Torii, R H. Particle detection by evaporation from superfluid helium. United States: N. p., 1992. Web. doi:10.1103/PhysRevLett.68.2429.
Bandler, S R, Lanou, R E, Maris, H J, More, T, Porter, F S, Seidel, G M, & Torii, R H. Particle detection by evaporation from superfluid helium. United States. doi:10.1103/PhysRevLett.68.2429.
Bandler, S R, Lanou, R E, Maris, H J, More, T, Porter, F S, Seidel, G M, and Torii, R H. Mon . "Particle detection by evaporation from superfluid helium". United States. doi:10.1103/PhysRevLett.68.2429.
@article{osti_7236930,
title = {Particle detection by evaporation from superfluid helium},
author = {Bandler, S R and Lanou, R E and Maris, H J and More, T and Porter, F S and Seidel, G M and Torii, R H},
abstractNote = {We report the first experiments in which 5-MeV alpha particles are detected via evaporation from a bath of superfluid helium. The {alpha} 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 {gamma}'s from a {sup 137}Cs source.},
doi = {10.1103/PhysRevLett.68.2429},
journal = {Physical Review Letters; (United States)},
issn = {0031-9007},
number = ,
volume = 68:16,
place = {United States},
year = {1992},
month = {4}
}