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WO1997012373A3 - Method and apparatus for laser separation of molecular compounds - Google Patents

Method and apparatus for laser separation of molecular compounds Download PDF

Info

Publication number
WO1997012373A3
WO1997012373A3 PCT/GB1996/002281 GB9602281W WO9712373A3 WO 1997012373 A3 WO1997012373 A3 WO 1997012373A3 GB 9602281 W GB9602281 W GB 9602281W WO 9712373 A3 WO9712373 A3 WO 9712373A3
Authority
WO
WIPO (PCT)
Prior art keywords
pulse
selectively
excited state
excited
component
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.)
Ceased
Application number
PCT/GB1996/002281
Other languages
French (fr)
Other versions
WO1997012373A2 (en
Inventor
Walter Perrie
Godfrey Beddard
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.)
Sellafield Ltd
Original Assignee
British Nuclear Fuels PLC
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 British Nuclear Fuels PLC filed Critical British Nuclear Fuels PLC
Publication of WO1997012373A2 publication Critical patent/WO1997012373A2/en
Publication of WO1997012373A3 publication Critical patent/WO1997012373A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D59/00—Separation of different isotopes of the same chemical element
    • B01D59/34—Separation by photochemical methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/007—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by irradiation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/636—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited using an arrangement of pump beam and probe beam; using the measurement of optical non-linear properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
    • B01D2259/808—Laser

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Nonlinear Science (AREA)
  • Biophysics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Lasers (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)

Abstract

A method of selectively stimulating one molecular component in a mixture is provided. The method involves raising both components to a first excited state with a first pulse of laser radiation, and selectively raising one component to a second excited state with a second pulse of laser radiation of femtosecond duration. The second pulse may be provided at a time after the first pulse equal to an integral number of half periods of the natural resonance period of the selected component and/or when the intranuclear separation is at or close to its maximum, both pulses being of duration very much less than that resonance period. The selectively excited molecule may fluoresce from the second excited state, for example allowing iodine to be detected even in the presence of an oxide of nitrogen. Alternatively, the mixture may comprise isotopes of an element and the selectively excited isotope may then be separated, e.g. deuterium from hydrogen, 129I2 from 127I2 or ?235U from 238¿U, in molecular form, by a chemical or physical process.
PCT/GB1996/002281 1995-09-15 1996-09-16 Method and apparatus for laser separation of molecular compounds Ceased WO1997012373A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9518954.4A GB9518954D0 (en) 1995-09-15 1995-09-15 Molecular separation
GB9518954.4 1995-09-15

Publications (2)

Publication Number Publication Date
WO1997012373A2 WO1997012373A2 (en) 1997-04-03
WO1997012373A3 true WO1997012373A3 (en) 1997-05-09

Family

ID=10780814

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1996/002281 Ceased WO1997012373A2 (en) 1995-09-15 1996-09-16 Method and apparatus for laser separation of molecular compounds

Country Status (2)

Country Link
GB (1) GB9518954D0 (en)
WO (1) WO1997012373A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2652260C2 (en) * 2016-10-03 2018-04-25 федеральное государственное бюджетное образовательное учреждение высшего образования "Воронежский государственный университет" (ФГБОУ ВО "ВГУ") Method of laser separation of lithium isotopes
RU2651338C2 (en) * 2016-10-06 2018-04-19 Федеральное государственное бюджетное образовательное учреждение высшего образования "Воронежский государственный университет" (ФГБОУ ВПО "ВГУ") Iodine isotopes laser separation method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020350A (en) * 1975-06-23 1977-04-26 Massachusetts Institute Of Technology Isotope selective excitation and separation method and apparatus utilizing circularly polarized pulsed radiation
US4461686A (en) * 1981-12-03 1984-07-24 Allied Corporation Sequential multiphoton excitation method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020350A (en) * 1975-06-23 1977-04-26 Massachusetts Institute Of Technology Isotope selective excitation and separation method and apparatus utilizing circularly polarized pulsed radiation
US4461686A (en) * 1981-12-03 1984-07-24 Allied Corporation Sequential multiphoton excitation method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
R M BOWMAN, CHEMICAL PHYSICS LETTERS, vol. 161, no. 4.5, 22 September 1989 (1989-09-22), pages 297 - 302, XP002025839 *

Also Published As

Publication number Publication date
GB9518954D0 (en) 1995-11-15
WO1997012373A2 (en) 1997-04-03

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