GB2267965A - Method and apparatus for detecting hydrogen-containing compounds - Google Patents

Method and apparatus for detecting hydrogen-containing compounds

Info

Publication number
GB2267965A
GB2267965A GB9316399A GB9316399A GB2267965A GB 2267965 A GB2267965 A GB 2267965A GB 9316399 A GB9316399 A GB 9316399A GB 9316399 A GB9316399 A GB 9316399A GB 2267965 A GB2267965 A GB 2267965A
Authority
GB
United Kingdom
Prior art keywords
hydrogen
detector
alpha particles
protons
alpha
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9316399A
Other versions
GB9316399D0 (en
Inventor
James A Mcneil
David S Oakley
Charles E Price
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Colorado School of Mines
Original Assignee
Colorado School of Mines
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Colorado School of Mines filed Critical Colorado School of Mines
Publication of GB9316399D0 publication Critical patent/GB9316399D0/en
Publication of GB2267965A publication Critical patent/GB2267965A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T7/00—Details of radiation-measuring instruments
    • G01T7/02—Collecting means for receiving or storing samples to be investigated and possibly directly transporting the samples to the measuring arrangement; particularly for investigating radioactive fluids
    • G01T7/04—Collecting means for receiving or storing samples to be investigated and possibly directly transporting the samples to the measuring arrangement; particularly for investigating radioactive fluids by filtration
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
    • G01N23/225—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material using electron or ion
    • G01N23/2255—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material using electron or ion using incident ion beams, e.g. proton beams
    • G01N23/2258—Measuring secondary ion emission, e.g. secondary ion mass spectrometry [SIMS]

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Molecular Biology (AREA)
  • General Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Measurement Of Radiation (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)

Abstract

A low-cost detector of hydrogen-containing compounds in gas or thin-film samples (10) is disclosed. The device preferably includes an alpha particle source (1), an energy degrading medium (13), a charged particle detector (e.g. a solid state diode detector) (7), and amplification (16), threshold (19), logic (22), timing (25) circuits, humidity correction apparatus (28), and alarm/display circuit (31). The invention relies upon the use of the energy degrading foil (13) to pass selectively certain particles. Energetic alpha particles from a radioactive source (1) enter the sample (10) and hydrogen nuclei, or protons, elastically scattered by alpha particles, are able to penetrate the energy degrading foil (13) which is thick enough to stop the alpha particles (4). The protons are detected and a suitable output signal can be produced to provide an accurate measure of the quantity of hydrogen in the gas or thin-film sample. The hydrogen detector can be combined with a smoke detector to produce an apparatus capable of detecting both smoke and hydrogen. This technology can also be used to reduce noise and block light penetration in a radon detection application.
GB9316399A 1991-02-06 1993-08-06 Method and apparatus for detecting hydrogen-containing compounds Withdrawn GB2267965A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US65130491A 1991-02-06 1991-02-06
PCT/US1992/000945 WO1992014170A1 (en) 1991-02-06 1992-02-06 Method and apparatus for detecting hydrogen-containing compounds

Publications (2)

Publication Number Publication Date
GB9316399D0 GB9316399D0 (en) 1993-10-27
GB2267965A true GB2267965A (en) 1993-12-22

Family

ID=24612352

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9316399A Withdrawn GB2267965A (en) 1991-02-06 1993-08-06 Method and apparatus for detecting hydrogen-containing compounds

Country Status (5)

Country Link
EP (1) EP0570485A1 (en)
AU (1) AU1362592A (en)
CA (1) CA2103574A1 (en)
GB (1) GB2267965A (en)
WO (1) WO1992014170A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043955A (en) * 1960-01-25 1962-07-10 Hughes Aircraft Co Discriminating radiation detector
US4186303A (en) * 1978-01-12 1980-01-29 Westinghouse Electric Corp. Exclusion of alpha particles from thoron in uranium detection
US4194115A (en) * 1978-11-07 1980-03-18 Nasa Method and means for helium/hydrogen ratio measurement by alpha scattering
US4960998A (en) * 1988-07-25 1990-10-02 Juergen Peter Method and apparatus for continuously determining gas-carried alpha-radioactivity

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043955A (en) * 1960-01-25 1962-07-10 Hughes Aircraft Co Discriminating radiation detector
US4186303A (en) * 1978-01-12 1980-01-29 Westinghouse Electric Corp. Exclusion of alpha particles from thoron in uranium detection
US4194115A (en) * 1978-11-07 1980-03-18 Nasa Method and means for helium/hydrogen ratio measurement by alpha scattering
US4960998A (en) * 1988-07-25 1990-10-02 Juergen Peter Method and apparatus for continuously determining gas-carried alpha-radioactivity

Also Published As

Publication number Publication date
WO1992014170A1 (en) 1992-08-20
EP0570485A1 (en) 1993-11-24
CA2103574A1 (en) 1992-08-20
GB9316399D0 (en) 1993-10-27
AU1362592A (en) 1992-09-07

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)