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Title: Radon detection

Abstract

A detector for atmospheric radon using a long range alpha detector as its sensing element. An electrostatic filter removes ions from ambient air, while allowing radon atoms to pass into a decay cavity. Here, radon atoms are allowed to decay, creating air ions. These air ions are drawn by a fan through a second electrostatic filter which can be activated or deactivated, and into the long range alpha detector. With the second electrostatic filter activated, no air ions are allowed to pass, and the signal output from the long range alpha detector consists of only the electronic background. With the second electrostatic filter deactivated, air ions and cosmic rays will be detected. The cosmic ray contribution can be minimized by shielding.

Inventors:
 [1];  [2];  [1]
  1. (Los Alamos, NM)
  2. (Ojo Caliente, NM)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
869135
Patent Number(s):
US 5281824
Assignee:
United States Department of Energy (Washington, DC) LANL
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
radon; detection; detector; atmospheric; range; alpha; sensing; element; electrostatic; filter; removes; ambient; air; allowing; atoms; pass; decay; cavity; allowed; creating; drawn; fan; activated; deactivated; signal; output; consists; electronic; background; cosmic; rays; detected; ray; contribution; minimized; shielding; signal output; decay cavity; electrostatic filter; ambient air; sensing element; alpha detector; range alpha; atmospheric radon; radon atoms; cosmic rays; allowing radon; /250/

Citation Formats

MacArthur, Duncan W., Allander, Krag S., and Bounds, John A.. Radon detection. United States: N. p., 1994. Web.
MacArthur, Duncan W., Allander, Krag S., & Bounds, John A.. Radon detection. United States.
MacArthur, Duncan W., Allander, Krag S., and Bounds, John A.. 1994. "Radon detection". United States. doi:. https://www.osti.gov/servlets/purl/869135.
@article{osti_869135,
title = {Radon detection},
author = {MacArthur, Duncan W. and Allander, Krag S. and Bounds, John A.},
abstractNote = {A detector for atmospheric radon using a long range alpha detector as its sensing element. An electrostatic filter removes ions from ambient air, while allowing radon atoms to pass into a decay cavity. Here, radon atoms are allowed to decay, creating air ions. These air ions are drawn by a fan through a second electrostatic filter which can be activated or deactivated, and into the long range alpha detector. With the second electrostatic filter activated, no air ions are allowed to pass, and the signal output from the long range alpha detector consists of only the electronic background. With the second electrostatic filter deactivated, air ions and cosmic rays will be detected. The cosmic ray contribution can be minimized by shielding.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1994,
month = 1
}

Patent:

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  • A method of detecting the presence of a coating of gaseous molecules on the surface of solid particulate material comprises the steps of entrapping the particulate material in a chemically inert carrier gas, heating the said material to release the gaseous molecules adsorbed on the particles, separating the particles from the carrier gas and the previously adsorbed gas molecules, passing the gases to a plasma, and spectroscopically analyzing the light emitted therefrom to detect the presence of the previously adsorbed gas.
  • A system is designed for monitoring or controlling the level of radon in indoor air, based upon measuring alpha particles due to the decay of radon or its daughter atoms. In one embodiment, the alpha particle decay of radon itself is detected and analyzed to control a vent in the heating and air conditioning system to automatically keep the radon level below a preselected level. In another embodiment, the daughter atoms {sub 218}Po and {sub 214}Po are collected from the indoor air and their alpha particle decays are analyzed to provide a sensitive monitor of radon levels or to controlmore » vents in the HVAC system to reduce radon concentrations to permissible levels. In addition, the system provides information on the quality of the air filter and indicates when it needs servicing.« less
  • A detector for atmospheric radon using a long range alpha detector as its sensing element is described. An electrostatic filter removes ions from ambient air, while allowing radon atoms to pass into a decay cavity. Here, radon atoms are allowed to decay, creating air ions. These air ions are drawn by a fan through a second electrostatic filter which can be activated or deactivated, and into the long range alpha detector. With the second electrostatic filter activated, no air ions are allowed to pass, and the signal output from the long range alpha detector consists of only the electronic background.more » With the second electrostatic filter deactivated, air ions and cosmic rays will be detected. The cosmic ray contribution can be minimized by shielding. 3 figures.« less
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