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Title: Particle detection using superfluid helium

Abstract

We have observed 5 MeV {alpha} particles stopped in volumes-up to two liters of liquid helium at 70 mK. A fraction of the kinetic energy of an {alpha} particle is converted to elementary excitations (rotons and phonons), which progagate ballistically in isotopically pure {sup 4}He below 0.1 K. Most of these excitations have sufficient energy to evaporate helium atoms on hitting a free surface. The evaporated helium atoms can be detected calorimetrically when adsorbed on a thin silicon wafer ({approximately}1.7 g, 35 cm{sup 2}) suspended above the liquid. Temperature changes of the silicon are measured with a NTD germanium bolometer. For the geometry studied the observed temperature change of the silicon resulting from an {alpha} event in the liquid is approximately 5% of the temperature rise from an {alpha} hitting the silicon directly. The implications of these measurements will be discussed as they relate to the possible construction of a large scale detector of solar neutrinos.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Brown Univ., Providence, RI (United States). Dept. of Physics
Sponsoring Org.:
USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
OSTI Identifier:
10137502
Report Number(s):
DOE/ER/40452-6; CONF-9109357-1
ON: DE92011603
DOE Contract Number:  
FG02-88ER40452
Resource Type:
Conference
Resource Relation:
Conference: 6. international workshop on low temperature particle detectors,Oxford (United Kingdom),5 Sep 1991; Other Information: PBD: [1991]
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; SHOWER COUNTERS; SUPERFLUIDITY; SOLAR NEUTRINOS; NEUTRINO DETECTION; SI SEMICONDUCTOR DETECTORS; HELIUM; ALPHA PARTICLES; TEMPERATURE DEPENDENCE; 440104; 662320; HIGH ENERGY PHYSICS INSTRUMENTATION; NEUTRINO INTERACTIONS

Citation Formats

Bandler, S R, Lanou, R E, Maris, H J, More, T, Porter, F S, Seidel, G M, and Torii, R. Particle detection using superfluid helium. United States: N. p., 1991. Web.
Bandler, S R, Lanou, R E, Maris, H J, More, T, Porter, F S, Seidel, G M, & Torii, R. Particle detection using superfluid helium. United States.
Bandler, S R, Lanou, R E, Maris, H J, More, T, Porter, F S, Seidel, G M, and Torii, R. Tue . "Particle detection using superfluid helium". United States. https://www.osti.gov/servlets/purl/10137502.
@article{osti_10137502,
title = {Particle detection using 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},
abstractNote = {We have observed 5 MeV {alpha} particles stopped in volumes-up to two liters of liquid helium at 70 mK. A fraction of the kinetic energy of an {alpha} particle is converted to elementary excitations (rotons and phonons), which progagate ballistically in isotopically pure {sup 4}He below 0.1 K. Most of these excitations have sufficient energy to evaporate helium atoms on hitting a free surface. The evaporated helium atoms can be detected calorimetrically when adsorbed on a thin silicon wafer ({approximately}1.7 g, 35 cm{sup 2}) suspended above the liquid. Temperature changes of the silicon are measured with a NTD germanium bolometer. For the geometry studied the observed temperature change of the silicon resulting from an {alpha} event in the liquid is approximately 5% of the temperature rise from an {alpha} hitting the silicon directly. The implications of these measurements will be discussed as they relate to the possible construction of a large scale detector of solar neutrinos.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {12}
}

Conference:
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