Publications By Molecule

Articles [By Date]

Index

• H₃⁺
• HeH⁺
• CH₂⁺, CH₃⁺, CH₅⁺
• C₂⁺, C₂^-, C₂H₂⁺, C₂H₃⁺
• HCN⁺, HCNH⁺, HCO⁺
• NH₂⁺, NH₃⁺, NH₄⁺
• N₂⁺, HN₂⁺
• OH⁺, OH^-, H₂O⁺, H₃O⁺
• ArH⁺
• Solid Hydrogen
• Other

H₃⁺

• Introductory remarks,
  T. Oka, Philos. Trans. R. Soc. London, Ser. A 364, 2847–2853 (2006).
• Near-infrared spectroscopy of H₃⁺ above the barrier to linearity,
  J. L. Gottfried, Philos. Trans. R. Soc. London, Ser. A 364, 2917-2929 (2006).
• Correction and addendum to Oka 2000: introductory remarks,
  T. Oka, Philos. Trans. R. Soc. London, Ser. A 364, 3149–3151 (2006).
• Interstellar H₃⁺,
  T. Oka, Proceedings of the National Academy of Sciences of the United States of America. 33, 12235-12242 (2006).
• The interstellar medium of IRAS 08572+3915 NW: H₃⁺ and warm high-velocity CO,
  T. R. Geballe, M. Goto, T. Usuda, T. Oka, B. J. McCall, Astrophys. J. 644(2, Pt. 1), 907-913 (2006).
• A key molecular ion in the universe and in the laboratory,
  T. R. Geballe and T. Oka, Science 5780, 1610-1612 (2006).
• Hot and diffuse clouds near the galactic center probed by metastable H₃⁺,
  T. Oka, T. R. Geballe, M. Goto, T. Usuda, B. J. McCall, Astrophys. J. 632(2, Pt. 1), 882-893 (2005).
• Search for H₃⁺ in HD 141569A,
  M. Goto, T. R. Geballe, B. J. McCall, T. Usuda, H. Suto, H. Terada, N. Kobayashi, T. Oka, Astrophys. J. 629(2, Pt. 1), 865-872 (2005).
• H₃⁺ line survey towards the Galactic center,
  M. Goto, B. J. McCall, T. R. Geballe, T. Usuda, and T. Oka, Springer Proceedings in Physics 91, 537-540 (2004).
• The nonthermal rotational distribution of H₃⁺,
  T. Oka and E. Epp, Astrophys. J. 613, 349-354 (2004).
• The ubiquitous H₃⁺,
  T. Oka, Springer Proceedings in Physics 91, 37-42 (2004).
• H₃⁺ in dark clouds,
  T. R. Geballe, B. J. McCall, T. Oka, in “Chemistry as a Diagnostic of Star Formation” (C. L. Curry and M. Fich, Eds.), pp. 46-49, National Research Council of Canada, Ottawa, 2003.
• Enigma of H₃⁺ in diffuse interstellar clouds,
  B. J. McCall and T. Oka, in “Dissociative Recombination of Molecular Ions with Electrons” (S. L. Guberman, Ed.), pp. 365-371, Kluwer Academic/Plenum Publishers, New York, 2003.
• Help!!! Theory for H₃⁺ recombination badly needed,
  T. Oka, in “Dissociative Recombination of Molecular Ions with Electrons” (S. L. Guberman, Ed.), pp. 209-220, Kluwer Academic/Plenum Publishers, New York, 2003.
• Observation of interstellar H₃⁺ using Subaru IRCS. The galactic center,
  M. Goto, B. J. McCall, T. R. Geballe, T. Usuda, N. Kobayashi, H. Terada, and T. Oka, Astronomical Society of the Pacific Conference Series  289, 189-193 (2003).
• Near-infrared spectroscopy of H₃⁺ above the barrier to linearity,
  J. L. Gottfried, B. J. McCall, and T. Oka, J. Chem. Phys. 118, 10890-10899 (2003).
• Absorption line survey of H₃⁺ toward the Galactic Center sources I. GCS 3-2 and GC IRS3,
  M. Goto, B. J. McCall, T. R. Geballe, T. Usuda, N. Kobayashi, H. Terada, and T. Oka, Publ. Astron. Soc. Jpn. 54, 951–961 (2002).
• Observations of H₃⁺ in the diffuse interstellar medium,
  B. J. McCall, K. H. Hinkle, T. R. Geballe, G. H. Moriarty-Schieven, N. J. Evans II, K. Kawaguchi, S. Takano, V. V. Smith, and T. Oka, Astrophys. J. 567, 391–406 (2002).
• Comprehensive evaluation of H₃⁺ Spectroscopy,
  C. M. Lindsay and B. J. McCall,. J. Mol. Spectrosc. 210, 60-83 (2001).
• Survey of H₃⁺ transitions between 3000 and 4200 cm^-1,
  C. M. Lindsay, R. M. Rade, Jr., and T. Oka, J. Mol. Spectrosc. 210, 51–59 (2001).
• Selection rules for nuclear spin modifications in ion-neutral reactions involving H₃⁺,
  M. Cordonnier, D. Uy, R. M. Dickson, K. E. Kerr, Y. Zhang, and T. Oka, J. Chem. Phys. 113, 3181–3193 (2000).
• Measurement of the H₃⁺ destruction rate due to ambipolar diffusion in an AC positive column discharge,
  C. M. Lindsay, E. T. White, and T. Oka, Chem. Phys. Lett. 328, 129–134 (2000).
• Introductory remarks (On astronomy, physics, and chemistry of H₃⁺),
  T. Oka, Philos. Trans. R. Soc. London, Ser. A 358, 2363–2369 (2000).
• Laboratory spectroscopy of H₃⁺,
  Benjamin J. McCall,  Philos. Trans. R. Soc. London, Ser. A 358, 2385-2401 (2000).
• Combination band spectroscopy of H₃⁺,
  B. J. McCall and T. Oka, J. Chem. Phys. 113, 3104–3110 (2000).
• H₃⁺ — an ion with many talents,
  B. J. McCall and T. Oka, Science 287, 1941–1942 (2000).
• H₃⁺ in the diffuse interstellar medium: the enigma related to dissociative recombination,
  T. Oka, in “Dissociative Recombination: Theory, Experiment, and Applications IV” (M. Larsson, J. B. A. Mitchell, and I. F. Schneider, Eds.), pp. 13–24, World Scientific, Singapore, 2000.
• Observations of H₃⁺ in dense molecular clouds,
  B. J. McCall, T. R. Geballe, K. H. Hinkle, and T. Oka, Astrophys. J. 522, 338–348 (1999).
• Detection of H₃⁺ in the diffuse interstellar medium: the Galactic center and Cygnus OB2 Number 12,
  T. R. Geballe, B. J. McCall, K. H. Hinkle, and T. Oka, Astrophys. J. 510, 251–257 (1999).
• Recent Observations of H₃⁺ in Molecular Clouds, T. R. Geballe, B. J. McCall, and T. Oka, , in "Star Formation with the Infrared Space Observatory", ASP Conference Series, (J. L. Yun and R. Liseau, Eds.) Vol. 132, 1998, pp. 72-75.
• H₃⁺ in dense and diffuse clouds,
  B. J. McCall, K. H. Hinkle, T. R. Geballe, and T. Oka, Faraday Discuss. 109, 267–280 (1998).
• Detection of H₃⁺ in the diffuse interstellar medium toward Cygnus OB2 No. 12,
  B. J. McCall, T. R. Geballe, K. H. Hinkle, and T. Oka, Science 279, 1910–1913 (1998).
• The infrared spectrum of H₃⁺ in laboratory and space plasmas,
  T. Oka in “Spectroscopy: Perspectives and Frontiers” (A. P. Roy, Ed.), pp. 1–16, Narosa, New Delhi, 1997.
• Observation of ortho-para H₃⁺ selection rules in plasma chemistry,
  D. Uy, M. Cordonnier, and T. Oka, Phys. Rev. Lett. 78, 3844–3847 (1997).
• Detection of H₃⁺ in interstellar space, T. R. Geballe and T. Oka, Nature 384, 334–335 (1996).
• Application of laser spectroscopy to fundamental molecular species: H₃⁺ and solid H₂,
  T. Oka, in “Frontiers in Laser Spectroscopy” (Proceedings of the International School of Physics “Enrico Fermi” Course CXX) (T. W. Hänsch and M. Inguscio, Eds.), pp. 61–87, North Holland, New York, 1994.
• Spectral lines and distribution of H₃⁺ in high rotational levels,
  D. Uy, C. M. Gabrys, M.-F. Jagod, and T. Oka, J. Chem. Phys. 100, 6267–6274 (1994).
• Near infrared 3ν₂ overtone band of H₃⁺,
  B. F. Ventrudo, D. T. Cassidy, Z. Y. Guo, S. Joo, S. S. Lee, and T. Oka, J. Chem. Phys. 100, 6263–6266 (1994).
• Detection of H₃⁺ infrared emission lines in Saturn,
  T. R. Geballe, M.-F. Jagod, and T. Oka, Astrophys. J. 408, L109–L112 (1993).
• Infrared spectrum of H₃⁺ as an astronomical probe,
  T. Oka and M.-F. Jagod, J. Chem. Soc., Faraday Trans. 89, 2147–2154 (1993).
• The infrared spectrum of H₃⁺ in laboratory and space plasmas,
  T. Oka, Rev. Mod. Phys. 64, 1141–1149 (1992).
• Observation of infrared forbidden transitions of H₃⁺,
  L.-W. Xu, M. Rösslein, C. M. Gabrys, and T. Oka, J. Mol. Spectrosc. 153, 726–737 (1992).
• A table of astronomically important ro-vibrational transitions for the H₃⁺ molecular ion,
  L. Kao, T. Oka, S. Miller, J. Tennyson, Astrophys. J. Suppl. Ser. 77, 317–329 (1991).
• Observation of the 3ν₂ ← 0 overtone band of H₃⁺,
  S. S. Lee, B. F. Ventrudo, D. T. Cassidy, T. Oka, S. Miller, and J. Tennyson, J. Mol. Spectrosc. 145, 222–224 (1991).
• Observation of the 2ν₂(l = 2) ← 0 overtone band of H₃⁺,
  L.-W. Xu, C. Gabrys, and T. Oka, J. Chem. Phys. 93, 6210–6215 (1990).
• Laboratory observation of hot bands of H₃⁺,
  M. G. Bawendi, B. D. Rehfuss, and T. Oka, J. Chem. Phys. 93, 6200–6209 (1990).
• Observations of the 4 micron fundamental band of H₃⁺ in Jupiter,
  T. Oka and T. R. Geballe, Astrophys. J. 351, L53–L56 (1990).
• An infrared spectroscopic search for the molecular ion H₃⁺,
  T. R. Geballe and T. Oka, Astrophys. J. 342, 855–859 (1989).
• Calculated forbidden rotational spectra of H₃⁺,
  F.-S. Pan and T. Oka, Astrophys. J. 305, 518–525 (1986).
• Observation and analysis of the ν₂ and ν₃ fundamental bands of the H₂D⁺ ion,
  S. C. Foster, A. R. W. McKellar, I. R. Peterkin, J. K. G. Watson, F. S. Pan, M. W. Crofton, R. S. Altman, and T. Oka, J. Chem. Phys. 84, 91–99 (1986).
• The infrared spectrum of the ν₂ fundamental band of the H₃⁺ molecular ion,
  J. K. G. Watson, S. C. Foster, A. R. W. McKellar, P. Bernath, T. Amano, F. S. Pan, M. W. Crofton, R. S. Altman, and T. Oka, Can. J. Phys. 62, 1875–1885 (1984).
• The H₃⁺ ion,
  T. Oka, in “Molecular Ions: Spectroscopy, Structure, and Chemistry” (T. A. Miller and V. E. Bondybey, Eds.), pp. 73–90, North Holland, New York, 1983.
• A search for interstellar H₃⁺,
  T. Oka, Philos. Trans. R. Soc. London, Ser. A 303, 543–549 (1981).
• The infrared spectrum of H₃⁺,
  T. Oka, in “Laser Spectroscopy V” (A. R. W. McKellar, T. Oka, and B. P. Stoicheff, Eds.), pp. 320–323, Springer-Verlag, New York, 1981.
• Observation of the infrared spectrum of H₃⁺,
  T. Oka, Phys. Rev. Lett. 45, 531–534 (1980).

HeH⁺

• Observation of the rotational spectra of ⁴HeH⁺, ⁴HeD⁺, ³HeH⁺, and ³HeD⁺,
  F. Matsushima, T. Oka, and K. Takagi, Phys. Rev. Lett. 78, 1664–1666 (1997).
• Infrared spectra of ⁴HeH⁺, ⁴HeD⁺, ³HeH⁺, and ³HeD⁺,
  M. W. Crofton, R. S. Altman, N. N. Haese, and T. Oka, J. Chem. Phys. 91, 5882–5886 (1989).

CH₂⁺

• Near-infrared electronic spectrum of CH₂⁺,
  J. L. Gottfried and T. Oka, J. Chem. Phys. 121, 11527-11529 (2004).
• Detection of the infrared spectrum of CH₂⁺,
  M. Rösslein, C. M. Gabrys, M.-F. Jagod, and T. Oka, J. Mol. Spectrosc. 153, 738–740 (1992).

CH₃⁺

• Infrared spectrum of CH₃⁺ involving high rovibrational levels,
  M. F. Jagod, C. M. Gabrys, M. Rösslein, D. Uy, and T. Oka, Can. J. Phys. 72, 1192–1199 (1994).
• Infrared spectroscopy of carbo-ions: the ν₁ and ν₄ bands of CH₂D⁺, and the ν₁ band of CHD₂⁺,
  M.-F. Jagod, M. Rösslein, C. M. Gabrys, and T. Oka, J. Mol. Spectrosc. 153, 666–679 (1992).
• Laboratory infrared spectra of CH₂D⁺ and HCCD⁺ and predicted microwave transitions,
  M. Rösslein, M.-F. Jagod, C. M. Gabrys, and T. Oka, Astrophys. J. 382, L51–L53 (1991).
• Infrared spectroscopy of carbo-ions. III. ν₃ band of methyl cation CH₃⁺,
  M. W. Crofton, M.- F. Jagod, B. D. Rehfuss, W. A. Kreiner, and T. Oka, J. Chem. Phys. 88, 666–678 (1988).
• Observation of the infrared spectrum of methyl cation CH₃⁺,
  M. W. Crofton, W. A. Kreiner, M.-F. Jagod, B. D. Rehfuss, and T. Oka, J. Chem. Phys. 83, 3702–3703 (1985).

CH₅⁺

• CH₅⁺ stability and mass spectrometry,
  E. T. White and T. Oka, Science 286, 1051 (1999).
• CH₅⁺: The infrared spectrum observed,
  E. T. White, J. Tang, and T. Oka, Science 284, 135–137 (1999).

C₂⁺

• High-resolution spectroscopy of the 2²Π_u ← X⁴Σ_g^- forbidden transitions of C₂⁺,
  C. G. Tarsitano, C. F. Neese, and T. Oka, J. Chem. Phys. 121, 6290-6297 (2004).

C₂^-

• Infrared spectroscopy of carbo-ions. IV. The A²Π_u-X²Σ_g⁺ electronic transition of C₂^-,
  B. D. Rehfuss, D.-J. Liu, B. M. Dinelli, M.-F. Jagod, W. C. Ho, M. W. Crofton, and T. Oka, J. Chem. Phys. 89, 129–137 (1988).

C₂H₂⁺

• Infrared spectroscopy of carbo-ions. VI. C–H stretching vibration of the acetylene ion C₂H₂⁺ and isotopic species,
  M.-F. Jagod, M. Rösslein, C. M. Gabrys, B. D. Rehfuss, F. Scappini, M. W. Crofton, and T. Oka, J. Chem. Phys. 97, 7111–7123 (1992).
• Infrared spectra of carboions. II. ν₃ band of acetylene ion C₂H₂⁺ (²Π_u),
  M. W. Crofton, M.- F. Jagod, B. D. Rehfuss, and T. Oka, J. Chem. Phys. 86, 3755–3756 (1987).

C₂H₃⁺

• Infrared spectroscopy of carboions. VIII. Hollow cathode spectroscopy of protonated acetylene, C₂H₃⁺,
  C. M. Gabrys, D. Uy, M.-F. Jagod, T. Oka, and T. Amano, J. Phys. Chem. 99, 15611–15623 (1995).
• Infrared spectroscopy of carbo-ions. V. Classical vs. nonclassical structure of protonated acetylene C₂H₃⁺,
  M. W. Crofton, M.-F. Jagod, B. D. Rehfuss, and T. Oka, J. Chem. Phys. 91, 5139–5153 (1989).

HCN⁺

• Collision-induced double resonance studies of HN₂⁺ and HCN,
  C. J. Pursell, D. P. Weliky, and T. Oka, J. Chem. Phys. 93, 7041–7048 (1990).

HCNH⁺

• The ν₃ fundamental band of HCNH⁺ and the 2ν₃ ← ν₃ and ν₂ + ν₃ ← ν₂ hot bands of HCO⁺,
  D.-J. Liu, S.-T. Lee, and T. Oka, J. Mol. Spectrosc. 128, 236–249 (1988).
• The infrared ν₅ band (HNC bend) of protonated hydrogen cyanide, HCNH⁺,
  W.-C. Ho, C. E. Blom, D.-J. Liu, and T. Oka, J. Mol. Spectrosc. 123, 251–253 (1987).
• High resolution infrared spectroscopy of the ν₁ (NH stretch) and ν₂ (CH stretch) bands of HCNH⁺,
  R. S. Altman, M. W. Crofton, and T. Oka, J. Chem. Phys. 81, 4255–4258 (1984).
• Observation of the infrared ν₂ (CH stretch) of protonated hydrogen cyanide, HCNH⁺,
  R. S. Altman, M. W. Crofton, and T. Oka, J. Chem. Phys. 80, 3911–3912 (1984).

HCO⁺

• The ν₃ fundamental band of HCNH⁺ and the 2ν₃ ← ν₃ and ν₂ + ν₃ ← ν₂ hot bands of HCO⁺,
  D.-J. Liu, S.-T. Lee, and T. Oka, J. Mol. Spectrosc. 128, 236–249 (1988).

NH₂⁺

• Infrared spectroscopy of the amidogen ion, NH₂⁺, Y. Kabbadj, T. R. Huet, D. Uy, and T. Oka, J. Mol. Spectrosc. 175, 277–288 (1996).
• Difference frequency laser spectroscopy of the ν₃ fundamental band of NH₂⁺,
  M. Okumura, B. D. Rehfuss, B. M. Dinelli, M. G. Bawendi, and T. Oka, J. Chem. Phys. 90, 5918–5923 (1989).

NH₃⁺

• The ν₂ + ν₃ - ν₂ band of NH₃⁺,
  T. R. Huet, Y. Kabbadj, C. M. Gabrys, and T. Oka, J. Mol. Spectrosc. 163, 206–213 (1994).
• Diode laser spectroscopy of the ν₂ fundamental and hot bands of NH₃⁺,
  S. S. Lee and T. Oka, J. Chem. Phys. 94, 1698–1704 (1991).
• Observation and analysis of the ν₃ band of NH₃⁺,
  M. G. Bawendi, B. D. Rehfuss, B. M. Dinelli, M. Okumura, and T. Oka, J. Chem. Phys. 90, 5910–5917 (1989).

NH₄⁺

• Observation of forbidden transitions of ammonium ion (NH₄⁺) Π₃ band and determination of ground state rotational constants. Observation of ν₃ band allowed transitions of ND₄⁺, M. W. Crofton and T. Oka, J. Chem. Phys. 86, 5983–5988 (1987).
• Infrared studies of molecular ions. I. The ν₃ band of NH₄⁺,
  M. W. Crofton and T. Oka, J. Chem. Phys. 79, 3157–3158 (1983).

N₂⁺

• Rotational analysis of the (3,3) and (4,4) bands of the A²Π_u ← X⁴Σ_g⁺ system of N₂⁺ in the near-infrared using velocity modulation spectroscopy,
  C. G. Tarsitano and T. Oka, J. Mol. Spectrosc. 219, 263-270 (2003).

HN₂⁺

• Infrared spectroscopy of highly excited vibrational levels of protonated nitrogen, HN₂⁺,
  Y. Kabbadj, T. R. Huet, B. D. Rehfuss, C. M. Gabrys, and T. Oka, J. Mol. Spectrosc. 163, 180–205 (1994).
• Collision-induced double resonance studies of HN₂⁺ and HCN,
  C. J. Pursell, D. P. Weliky, and T. Oka, J. Chem. Phys. 93, 7041–7048 (1990).
• Infrared-microwave double resonance spectroscopy of molecular ions: HN₂⁺,
  W. C. Ho, C. J. Pursell, D. P. Weliky, K. Takagi, and T. Oka, J. Chem. Phys. 93, 87–93 (1990).
• Observation of direct and collision-induced double resonance of a molecular ion,
  C. J. Pursell, D. P. Weliky, W. C. Ho, K. Takagi, and T. Oka, J. Chem. Phys. 91, 7997–7999 (1989).

OH⁺

• Infrared spectroscopy of highly excited vibrational levels of the hydroxyl ion, OH⁺,
  B. D. Rehfuss, M.-F. Jagod, L.-W. Xu, and T. Oka, J. Mol. Spectrosc. 151, 59–70 (1992).
• Infrared spectrum of the fundamental vibration-rotation band of ³Σ^- OH⁺,
  M. W. Crofton, R. S. Altman, M.-F. Jagod, and T. Oka, J. Phys. Chem. 89, 3614–3617 (1985).

OH^-

• Infrared spectrum of the fundamental vibration-rotation band of OD^-,
  B. D. Rehfuss, M. W. Crofton, and T. Oka, J. Chem. Phys. 85, 1785–1788 (1986).
• Observation of the rotational spectrum of OH^-,
  D.-J. Liu and T. Oka, J. Chem. Phys. 84, 2426–2427 (1986).

H₂O⁺

• Infrared spectroscopy and equilibrium structure of H₂O⁺ (X ²B₁),
  T. R. Huet, C. J. Pursell, W. C. Ho, B. M. Dinelli, and T. Oka, J. Chem. Phys. 97, 5977–5987 (1992).
• Infrared spectroscopy of the ν₃ band of H₂O⁺,
  B. M. Dinelli, M. W. Crofton, and T. Oka, J. Mol. Spectrosc. 127, 1–11 (1988).

H₃O⁺

• Infrared spectroscopy of H₃O⁺: The ν₁ fundamental band,
  J. Tang and T. Oka, J. Mol. Spectrosc. 196, 120–130 (1999).
• Observation of Δ|k-l| = 3 transitions in the ν₃ band of H₃O⁺,
  D. Uy, E. T. White, and T. Oka, J. Mol. Spectrosc. 183, 240–244 (1997).
• Infrared spectroscopy in a H₂-O₂-He discharge: H₃O⁺,
  W. C. Ho, C. J. Pursell, and T. Oka, J. Mol. Spectrosc. 149, 530–541 (1991).
• The ν₂ 1^- ← 0⁺ band of H₃¹⁸O⁺,
  N. N. Haese, D.-J. Liu, and T. Oka, J. Mol. Spectrosc. 130, 262–263 (1988).
• The calculated ν₂ (inversion) spectrum of H₃O⁺,
  D.-J. Liu, T. Oka, and T. J. Sears, J. Chem. Phys. 84, 1312–1316 (1986).
• Infrared spectrum of the ν₂ vibration-inversion band of H₃O⁺,
  D.-J. Liu, N. N. Haese, and T. Oka, J. Chem. Phys. 82, 5368–5372 (1985).
• Experimental determination of the ground-state inversion splitting in H₃O⁺,
  D.-J. Liu and T. Oka, Phys. Rev. Lett. 54, 1787–1789 (1985).
• Observation of the ν₂ (1^- ←  0⁺) inversion mode band in H₃O⁺ by high resolution infrared spectroscopy,
  N. N. Haese and T. Oka, J. Chem. Phys. 80, 572–573 (1984).

ArH⁺

• Doppler shift ion mobility measurements of ArH⁺ in a He dc glow discharge by diode laser spectroscopy,
  N. N. Haese and T. Oka, Proc. SPIE (Tunable Diode Laser Dev. Spectrosc. Appl.) 438, 165–169 (1983).
• Doppler shift and ion mobility measurements of ArH⁺ in a He dc glow discharge by infrared laser spectroscopy,
  N. N. Haese, F.-S. Pan, and T. Oka, Phys. Rev. Lett. 50, 1575–1578 (1983).

Solid H₂

• A remeasurement of the 2.4 μm spectrum of J=1 H₂ pairs in a parahydrogen crystal,
  C. M. Lindsay, T. Oka, and T. Momose, J. Mol. Spectrosc. 218, 131-133 (2003).
• Stimulated Stokes downconversion in liquid and solid parahydrogen,
  B. J. McCall, A. J. Huneycutt, R. J. Saykally, C. M. Lindsay, T. Oka, M. Fushitani, Y. Miyamoto, and T. Momose, Appl. Phys. Lett. 82, 1350–1352 (2003).
• Sharp spectral lines observed in γ-ray ionized parahydrogen crystals,
  T. Momose, C. M. Lindsay, Y. Zhang, and T. Oka, Phys. Rev. Lett. 86, 4795–4798 (2001).
• High resolution infrared spectroscopy of neutral and ion clusters in para-H₂ crystals,
  T. Oka, in “Nobel Symposium on Cluster Physics” (M. Larsson and E. Campbell, Eds.), pp. 191–205, World Scientific, Singapore, 2001.
• Infrared Spectrum of p-hydrogen crystals ionized by 3 MeV electrons: Cluster ions of hydrogen in condensed phase,
  M.-C. Chan, M. Okumura, and T. Oka, J. Phys. Chem. A 104, 3775–3779 (2000).
• High-resolution infrared spectroscopy of the J = 1 H₂ pair in parahydrogen crystals,
  Y. Zhang, T. J. Byers, M.-C. Chan, T. Momose, K. E. Kerr, D. P. Weliky, and T. Oka, Phys. Rev. B 58, 218–233 (1998).
• Variation of intermolecular interaction and local lattice distortion of parahydrogen crystals upon vibrational excitation,
  R. M. Dickson and T. Oka, Phys. Rev. B 57, 950–955 (1998).
• High-resolution spectroscopy of the impurity-induced Q₃(0) transition of solid parahydrogen,
  R. M. Dickson, T. Momose, T. J. Byers, and T. Oka, Phys. Rev. B 57, 941–949 (1998).
• Infrared spectroscopic study of rovibrational states of methane trapped in parahydrogen crystal,
  T. Momose, M. Miki, T. Wakabayashi, T. Shida, M.-C. Chan, S. S. Lee, and T. Oka, J. Chem. Phys. 107, 7707–7716 (1997).
• High-resolution spectroscopy of solid hydrogen,
  T. Momose and T. Oka, Oyo Buturi 65, 902–911 (1996).
• High-resolution infrared spectroscopy of Q₁(0) transitions in parahydrogen crystals induced by laser radiation field, external electric field, impurity quadrupole field, and the Coulomb field of charges,
  T. Oka, Fiz. Nizk. Temp. (Kiev) 22, 134–139 (1996).
• High-resolution infrared spectroscopy of isotopic impurity Q₁(0) transitions in solid parahydrogen, D. P. Weliky, K. E. Kerr, T. J. Byers, Y. Zhang, T. Momose, and T. Oka, J. Chem. Phys. 105, 4461–4481 (1996).
• Direct measurement of the crystal field splitting of isolated J = 1 impurities in solid parahydrogen,
  R. M. Dickson, T. J. Byers, and T. Oka, J. Low Temp. Phys. 102, 241–247 (1996).
• Observation of the S₃(0) transition in solid parahydrogen and a theory of solid-state rovibrational line widths,
  R. M. Dickson and T. Oka, J. Phys. Chem. 99, 2617–2624 (1995).
• Application of laser spectroscopy to fundamental molecular species: H₃⁺ and solid H₂,
  T. Oka, in “Frontiers in Laser Spectroscopy” (Proceedings of the International School of Physics “Enrico Fermi” Course CXX) (T. W. Hänsch and M. Inguscio, Eds.), pp. 61–87, North Holland, New York, 1994.
• Condon modulation spectroscopy of solid hydrogen and measurement of the temperature dependence of the Q₁(0) transition,
  K. E. Kerr, T. Momose, D. P. Weliky, C. M. Gabrys, and T. Oka, Phys. Rev. Lett. 72, 3957–3960 (1994).
• Charge-induced H₂ spectrum in γ-ray irradiated para-H₂ crystals,
  T. Momose, K. E. Kerr, D. P. Weliky, C. M. Gabrys, R. M. Dickson, and T. Oka, J. Chem. Phys. 100, 7840–7843 (1994).
• High-resolution laser spectroscopy of the Q_v(0) transitions in solid parahydrogen,
  D. P. Weliky, T. J. Byers, K. E. Kerr, T. Momose, R. M. Dickson, and T. Oka, Appl. Phys. B 59, 265–281 (1994).
• High-resolution spectroscopy of solid hydrogen,
  T. Oka, Annu. Rev. Phys. Chem. 44, 299–333 (1993).
• The stimulated Raman gain spectrum of the Q_1←0(0) transition of solid parahydrogen,
  T. Momose, D. P. Weliky, and T. Oka, J. Mol. Spectrosc. 153, 760–761 (1992).
• High resolution infrared spectroscopy of deuterium in p-H₂ matrix,
  M.-C. Chan, L.-W. Xu, C. M. Gabrys, and T. Oka, J. Chem. Phys. 95, 9404–9407 (1991).
• Laser spectroscopic studies of the pure rotational U₀(0) and W₀(0) transitions of solid parahydrogen,
  M.-C. Chan, S. S. Lee, M. Okumura, and T. Oka, J. Chem. Phys. 95, 88–97 (1991). (erratum)
• High-resolution infrared spectroscopy of solid hydrogen,
  M.-C. Chan, M. Okumura, C. M. Gabrys, L.-W. Xu, B. D. Rehfuss, and T. Oka, Phys. Rev. Lett. 66, 2060–2063 (1991). (erratum)
• Observation of the U_1←0(1) transition of solid deuterium,
  M.-C. Chan and T. Oka, J. Chem. Phys. 93, 979–982 (1990).
• High-resolution infrared spectroscopy of solid hydrogen: The tetrahexacontapole-induced ΔJ=6 transitions,
  M. Okumura, M.-C. Chan, and T. Oka, Phys. Rev. Lett. 62, 32–35 (1989).

Other Molecules

• Chemistry: nuclear spin conversion in molecules,
  T. Oka, Science 5756, 1913-1914 (2005).
• On the anomalous A₁-A₂ splittings in the ν₂–ν₄ manifold of PH₃,
  Y.-T. Chen and T. Oka, J. Mol. Spectrosc. 133, 148–156 (1989).
• Infrared-radiofrequency double resonance spectroscopy of CH₃F using a color center laser,
  C. Pursell, W. C. Ho, F. Scappini, and T. Oka, J. Mol. Spectrosc. 131, 241–249 (1988).
• Stark and Zeeman effects in ethylene observed by sub-Doppler infrared spectroscopy, Y.-T. Chen and T. Oka, J. Chem. Phys. 88, 5282–5290 (1988).
• Vibration-induced first-order Stark effect in tetrahedral molecules: SiH₄ and SiF₄,
  J. M. Frye, G. Magerl, W. A. Kreiner, and T. Oka, J. Chem. Phys. 88, 730–737 (1987).
• Vibrationally induced nuclear quadrupole coupling in the v₃ = 1 state of ¹⁸⁹OsO₄,
  F. Scappini, W. A. Kreiner, J. M. Frye, and T. Oka, J. Chem. Phys. 87, 5644–5648 (1987).
• Dicke narrowing and pressure broadening in the infrared fundamental band of HCl perturbed by Ar,
  D. R. Rao and T. Oka, J. Mol. Spectrosc. 122, 16–27 (1987).
• Observation of ground state rotational transitions in silicon tetrafluoride,
  L. Jörissen, W. A. Kreiner, Y.-T. Chen, T. Oka, J. Mol. Spectrosc. 120, 233–235 (1986).
• Sub-Doppler spectroscopy of the ν₂ band of NH₃ using microwave modulation sidebands of CO₂ laser lines,
  G. Magerl, W. Schupita, J. M. Frye, W. A. Kreiner, and T. Oka, J. Mol. Spectrosc. 107, 72–83 (1984).
• Radiofrequency-infrared double-resonance spectroscopy of OsO₄ using microwave modulation sidebands on CO₂ laser lines,
  F. Scappini, W. A. Kreiner, J. M. Frye, and T. Oka, J. Mol. Spectrosc. 106, 436–440 (1984).
• Microwave studies of collision-induced transitions between rotational levels. VIII. Collisions between NH₃ and polar molecules,
  A. R. Fabris and T. Oka, J. Chem. Phys. 78, 3462–3466 (1983).
• Laser stark spectroscopy of methyl cyanide in the 10-μm region: Analysis of the ν₄ and ν₇ bands, and the ν₇, 3ν₈¹ interaction,
  S. A. Rackley, R. J. Butcher, M. Römheld, S. M. Freund, and T. Oka, J. Mol. Spectrosc. 92, 203–217 (1982).
• Radiofrequency spectroscopy of AsH₃ inside a CO₂-NO₂ laser cavity,
  F. Scappini and T. Oka, J. Mol. Spectrosc. 85, 390–398 (1981).

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