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Selection of photodissociation products using a laser phase control techique.

Research Project

Project/Area Number 08454170
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Physical chemistry
Research InstitutionNagoya University (1997)
Hokkaido University (1996)

Principal Investigator

MATSUMI Yutaka  Solar-Terrestrial Environment Laboratory, Professor, 太陽地球環境研究所, 教授 (30209605)

Co-Investigator(Kenkyū-buntansha) 橋本 訓  北海道大学, 電子科学研究所, 助手 (60164787)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥7,800,000 (Direct Cost: ¥7,800,000)
Fiscal Year 1997: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1996: ¥6,200,000 (Direct Cost: ¥6,200,000)
Keywordslaser / phase control / multiphoton ionization / photodissociation / branching ratio / reaction dynamics / atmospheric chemistry / 反応ダイナミックス
Research Abstract

In this research, the laser phase control of product branching in photodissociation processes was investigated. In 1996, the ion imaging system was constructed, which enabled us to measure the translational enegies of the photofragments in the specific electronic, vibrational and rotational states. In this system, the photofragments were ionized using a resonance-enhanced multiphoton ionization technique. The producted ions were accelerated by an electric field and transferred in a field free drift tube. Then, the clouds of the spread ions due to the translational their motions were detected by a 2-dimensional detector. In 1997, the photodissociation processes of zone and CH_3 molecules were studied using the ion imaging system for the photodissociation products. The O (^3P) and O(^1D) atoms produced by the photodissociation of zone molecules in the Hartley and Huggins bands around 280-320nm were monitored. The photofragment excitation (PHOFEX) spectra for the O (^3P) and O(^1D) products were measured by scanning photodissociation laser wavelength and monitoring the signal intensities of O (^3P) and O (^1D) atoms. There were two dissociation pathways, O (^3P)+O_2 (X^3SIGMA^-_g) and O (^1D) +O_2 (a^1DELTA_g), in this photodissociation wavelength range. The PHOFEX spectrum for the O (^1P) atoms was found to have discreet vibrational structure of ozone, while that for the O (^1D) atoms were smooth. This indicated that the product branching was affected by the vibrational motion in the upper electronic surface of ozone, and suggested that the branching might be controlled by the laser coherent phase. For the CH_3I molecules, the effects of the phase difference between the one-photon and two-photon excitation processes were studied by monitoring the ion images of I^+ with 308 and 616nm laser light.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (52 results)

All Other

All Publications (52 results)

  • [Publications] Y.Matsumi,: "Vibrational distribution of ClO radicals produced in the reaction Cl +O_3→ClO+O_2" J.Phys.Chem.100. 176-176 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Takahashi,: "Photodissociation processes of ozone in the Huggins band at 308-326nm : Direct observation of O(^1D_2)and O(^3P_j)products." J.Phys.Chem.100. 4084-4089 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] M.Kawasaki: "Ion imaging of the photodissociation of HNCO near 217nm." Chem.Phys.Lett.251. 67-70 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Matsumi: "Translational realxation and electronic quenching of hot O(^1D)by collisions with N_2." J.Chem.Phys.104. 7036-7044 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Takahashi: "Product branching ratios O(^3P) atom and ClO radical formation in the reactions of O(^1D)with chlorinated compounds." J.Phys.Chem.100. 10145-10149 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] V.Skorokhodov: "Photofragmentation of ClNO in the A-band : Velocity distribution and fine-structure branching ratio of Cl(^2P_j)Atoms." J.Phys.Chem.100. 12321-12328 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] M.Kawasaki: "Ion imaging of the photodissociation of chlorine containing molecules." J.Phys.Chem.100. 19853-19858 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Takahashi: "Observation of the spin-forbidden O(^1D)+O_2(X^3Σ^-_g) channel in the 317-327nm photolysis od ozone." J.Chem.Phys.105. 5290-5293 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] L.J.Rogers: "Photodissociation of ICl at 235nm." Chem.Phys.Lett.258. 159-163 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] L.J.Rogers: "Photolysis of H_2S and CH_3SH at 243.1nm studied by photofragment ion imaging." J.Chem.Soc.Faraday Trans.92. 5181-5183 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Matsumi: "Reaction and quenching of Cl(^2P_j)atoms in collisions with methane and deuterated methanes." J.Phys.Chem.101. 1216-1221 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Suto: "Ion fragment imaging of the ion-pair photodissociation of CH_3Cl,CH_3Br,C_2H_5Cl and C_2H_5Br near 118nm." J.Phys.Chem.101. 1222-1226 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Suto: "Photofragment imaging of CH_3Br^+ from (CH_3Br)_2^+ at 355nm." J.Phys.Chem.101. 1227-1230 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Takahashi: "Photofragment excitation spectrum for O (^1D) from the photodissociation of jet-cooled ozone in the wavelength range 305-329nm." J.Chem.Phys.106. 6390-6397 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Takahashi: "Translational energy and angular distributions of O(^1D)and O(^3P)fragments in the UV photodissociation of ozone." Chem.Phys.(印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Takahashi: "Wavelength and temperature dependence of the absolute O(^1D)production yield from the 305-329nm photodissociation of ozone." J.Chem.Phys.(印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Matsumi et al.: "Vibrational distribution of CIO radicals produced in the reaction CI + O_3 * CIO + O_2" J.Phys.Chem. 100. 176-179 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Takahashi et al.: "Photodissociation processes of ozone in the Huggins band at 308-326nm : Direct observation of O (^1D_2) and O (^3P_j) products." J.Phys.Chem. 100. 4084-4089 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] M.Kawasaki et al.: "Ion imaging of the photodissociation of HNCO near 217nm." Chem.Phys.Lett.251. 67-70 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Matsumi et al.: "Translational relaxation and electronic quenching of hot O (^1D) by collisions with N_2." J.Chem.Phys.104. 7036-7044 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Takahashi et al.: "Product branching ratios for O (^3P) atom and CIO radical formation in the reactions of O (^1D) with chlorinated compounds." J.Phys.Chem.100. 10145-10149 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] V.Skorokhodov et al.: "Photofragmentation of CINO in the A-band : Velocity distribution and fine-structure branching ratio of CI (^2P_j) Atoms." J.Phys.Chem.100. 12321-12328 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] M.Kawasaki et al.: "Ion imaging of the photodissociation of chlorine containing molecules." J.Phys.Chem.100. 19853-19858 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] L.J.Rogers et al.: "Photodissociation of ICl at 235nm." Chem.Phys.Lett.258. 159-163 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Takahashi et al.: "Observation of the spin-forbidden O (^1D) + O_2 (X^3SIGMA^g) channel in the 317-327nm photolysis of ozone." J.Chem.Phys.105. 5290-5293 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] L.J.Rogers et al.: "Photolysis of H_2S and CH_3SH at 243.1nm studied by photofragment ion imaging." J.Chem.Soc.Faraday Trans.92. 5181-5183 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Matsumi et al.: "Reaction and quenching of Cl (^2P_j) atoms in collisions with methane and deuterated methanes." J.Phys.Chem.101. 1216-1221 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Suto et al.: "Ion fragment imaging of the ion-pair photodissociation of CH_3Cl, CH_3Br, C_2H_5Cl and C_2H_5Br near 118nm." J.Phys.Chem.101. 1222-1226 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Suto et al.: "Photofragment imaging of CH_3Br^+ from (CH_3Br)_2^+ at 355nm." J.Phys.Chem.101. 1227-1230 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Takahashi et al.: "Photofragment excitation spectrum for O (^1D) from the photodissociation of jet-cooled ozone in the wavelength range 305-329nm." J.Chem.Phys.106. 6390-6397 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Takahashi et al.: "Translational energy and angular distributions of O (^1D) and O (^3P) fragments in the UV photodissociation of ozone." Chem.Phys.(in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Takahashi et al.: "Wavelength and temperature dependence of the absolute O (^1D) production yield from the 305-329nm photodissociation of ozone." J.Chem.Phys.(in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] L.J.Rogers: "Photodissociation of ICI at 235 nm." Chem.Phys.Lett.258. 159-163 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] L.J.Rogers: "Photolysis of H_2S and CH_3SH at 243.1 nm studied by photofragment ion imaging." J.Chem.Soc.Faraday Trans.92. 5181-5183 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Matsumi: "Reaction and quenching of Cl (^2Pj) atoms in collisions with methane and deuterated methanes." J.Phys.Chem.101. 1216-1221 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Suto: "Ion fragment imaging of the ion-pair photodissociation of CH_3Cl,CH_3Br,C_2H_5Cl and C_2H_5Br near 118nm." J.Phys.Chem.101. 1222-1226 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Suto: "Photofragment imaging of CH_3Br^+ from (CH_3Br)_2^+ at 355nm." J.Phys.Chem.101. 1227-1230 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Takahashi: "Photofragment excitation spectrum for O (^1D) from the photodissociation of jet-cooled ozone in the wavelength range 305-329 nm." J.Chem.Phys.106. 6390-6397 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Takahashi: "Translational energy and angular distributions of O (^1D) and O (^3P) fragments in the UV photodissociation of ozone." Chem.Phys.(印刷中).

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Takahashi: "Wavelength and temperature dependence of the absolute O (^1D) production yield from the 305-329 nm photodissociation of ozone." J.Chem.Phys.(印刷中).

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Matsumi: "Vibrational distribution of ClO radicals produced in the reaction Cl + O_3 → ClO + O_2" J.Phys.Chem.100. 176-176 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] K.Takahashi: "Photodissociation processes of ozone in the Huggins band at 308-326 nm : Direct observation of O (^1D_2) and O (^3P_j) products" J.Phys.Chem.100. 4084-4089 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] M.Kawasaki: "Ion imaging of the photodissociation of HNCO near 217 nm" Chem.Phys.Lett.251. 67-70 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Y.Matsumi: "Translational realxation and electronic quenching of hot O (^1D) by collisions with N_2" J.Chem.Phys.104. 7036-7044 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] K.Takahashi: "Product branching ratios for O (^3P) atom and ClO radical formation in the reactions of O (^1D) with chlorinated compounds" J.Phys.Chem.100. 10145-10149 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] V.Skorokhodov: "Photofragmentation of ClNO in the A-band : Velocity distribution and fine-structure branching ratio of Cl (^2P_j) Atoms" J.Phys.Chem.100. 12321-12328 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] M.Kawasaki: "Ion imaging of the photodissociation of chlorine containing molecules" J.Phys.Chem.100. 19853-19858 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] K.Takahashi: "Observation of the spin-forbidden O (^1D) + O_2 (X^3Σ_g) channel in the 317-327 nm photolysis od ozone" J.Chem.Phys.105. 5290-5293 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Y.Matsumi: "Reaction and quenching of Cl (^2P_j) atoms in collisions with methane and deuterated methanes" J.Phys.Chem.(印刷中).

    • Related Report
      1996 Annual Research Report
  • [Publications] K.Suto: "Ion fragment imaging of the ion-pair photodissociation of CH_3Cl, CH_3Br, C_2H_5Cl and C_2H_5Br near 118 nm" J.Phys.Chem.(印刷中).

    • Related Report
      1996 Annual Research Report
  • [Publications] K.Suto: "Photofragment imaging of CH_3Br^+ from (CH_3Br)_2^+ at 355nm" J.Phys.Chem.(印刷中).

    • Related Report
      1996 Annual Research Report
  • [Publications] K.Takahashi: "Photofragment excitation spectrum for O (^1D) from the photodissociation of jet-cooled ozone in the wavelength range 305-329 nm" J.Chem.Phys.(印刷中).

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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