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Title: Research and development of a helium-4 based solar neutrino detector. Progress report, 1 January 1991--30 June 1992

Abstract

In this report we describe results of experiments to detect low energy radiation in superfluid helium. The ultimate aim of this research is to establish the feasibility of this technique for use in detecting neutrinos from the p-p and Be-7 reactions in the sun. In these experiments we have seen the first detection of 5.5 MeV {alpha} particles via evaporation from a bath of superfluid helium. An {alpha} particle 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 evaporated atoms are detected calorimetrically by a thin wafer suspended above the liquid. The approximate overall efficiency of this process has been determined and we compare the experimental results with expectations. We have also been able to detect evaporation induced by a flux of gamma rays from a Cs-137 source. Preparations made for new experiments are also discussed.

Authors:
; ;
Publication Date:
Research Org.:
Brown Univ., Providence, RI (United States). Dept. of Physics
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10161063
Report Number(s):
DOE/ER/40452-7
ON: DE92017390
DOE Contract Number:  
FG02-88ER40452
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 30 Jun 1992
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; SOLAR NEUTRINOS; NEUTRINO DETECTION; HELIUM 4; SUPERFLUIDITY; PROGRESS REPORT; BERYLLIUM 7; PROTON-PROTON INTERACTIONS; 662430; 662320; 440104; PROPERTIES OF LEPTONS; NEUTRINO INTERACTIONS; HIGH ENERGY PHYSICS INSTRUMENTATION

Citation Formats

Lanou, R E, Maris, H J, and Seidel, G M. Research and development of a helium-4 based solar neutrino detector. Progress report, 1 January 1991--30 June 1992. United States: N. p., 1992. Web. doi:10.2172/10161063.
Lanou, R E, Maris, H J, & Seidel, G M. Research and development of a helium-4 based solar neutrino detector. Progress report, 1 January 1991--30 June 1992. United States. doi:10.2172/10161063.
Lanou, R E, Maris, H J, and Seidel, G M. Tue . "Research and development of a helium-4 based solar neutrino detector. Progress report, 1 January 1991--30 June 1992". United States. doi:10.2172/10161063. https://www.osti.gov/servlets/purl/10161063.
@article{osti_10161063,
title = {Research and development of a helium-4 based solar neutrino detector. Progress report, 1 January 1991--30 June 1992},
author = {Lanou, R E and Maris, H J and Seidel, G M},
abstractNote = {In this report we describe results of experiments to detect low energy radiation in superfluid helium. The ultimate aim of this research is to establish the feasibility of this technique for use in detecting neutrinos from the p-p and Be-7 reactions in the sun. In these experiments we have seen the first detection of 5.5 MeV {alpha} particles via evaporation from a bath of superfluid helium. An {alpha} particle 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 evaporated atoms are detected calorimetrically by a thin wafer suspended above the liquid. The approximate overall efficiency of this process has been determined and we compare the experimental results with expectations. We have also been able to detect evaporation induced by a flux of gamma rays from a Cs-137 source. Preparations made for new experiments are also discussed.},
doi = {10.2172/10161063},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {6}
}