A Catalog of Diffuse Interstellar Bands in the Spectrum of HD 204827 (2008)
Hobbs, L. M., York, D. G., Snow, T. P., Oka, T., Thorburn, J. A., Bishof, M., ...
Echelle spectra of the double-lined spectroscopic binary HD 204827 were obtained on five nights, at a resolving power R = 38,000 and with a S/N ratio = 750 near 6000 A in the final, combined...
SPECTROSCOPY OF H$_3^+$ AND CO TOWARD THE GALACTIC CENTER (2007)
Oka, T., Morong, Christopher P., Geballe, T. R., Goto, Miwa, Usuda, Tomonori, Usuda, Kumiko S., ...
Author Institution: Dept of Astron. \& Astrophys. and Dept of Chem., Univ. of Chicago; Gemini Observatory, Hilo, Hawaii; Max Planck Institute for Astronomy, Heidelberg, Germany; Subaru Telescope,...
H$_3^+$ IN DIFFUSE INTERSTELLAR CLOUDS: A TRACER FOR THE COSMIC-RAY IONIZATION RATE (2007)
Indriolo, Nicholas, McCall, Benjamin J., Geballe, T. R., Oka, T.
Author Institution: Department of Astronomy and Department of Chemistry, University of Illinois at; Urbana-Champaign, Urbana, IL 61801; Gemini Observatory, Hilo, HI 96720; Department of Astronomy \&...
CH$_3^+$: A NEW TOOL FOR STUDYING THE ENIGMA OF INTERSTELLAR CH$^+$? (2007)
McCall, Benjamin J., Geballe, T. R., Oka, T.
Author Institution: Departments of Chemistry and Astronomy, University of Illinois; at Urbana-Champaign, Urbana, IL 61801; Gemini Observatory, Hilo, HI 96720; Department of Astronomy \& Astrophysics...
The Interstellar Medium of IRAS 08572+3915 NW: H3+ and Warm High Velocity CO (2006)
Geballe, T. R., Goto, M., Usuda, T., Oka, T., McCall, B. J.
We confirm the first detection of the molecular ion H3+ in an extragalactic object, the highly obscured ultraluminous galaxy IRAS 08572+3915 NW. We also have detected absorption lines of the...
Nonlinear Transport in One-Dimensional Mott Insulator in Strong Electric Fields (2005)
Time-dependent Schroedinger's equation is integrated for a one-dimensional strongly-correlated electron system driven by large electric fields. For larger electric fields, many-body Landau-Zener...
A deep submillimetre survey of the Galactic Centre (2005)
Pierce-Price, D., Richer, J. S., Greaves, J. S., Holland, W. S., Jenness, T., Lasenby, A. N., ...
We present first results from a submillimetre continuum survey of the Galactic Centre `Central Molecular Zone\' (CMZ), made with SCUBA on the James Clerk Maxwell Telescope. SCUBA\'s scan-map mode has...
Search for H3+ in HD141569A (2005)
Goto, M., Geballe, T. R., McCall, B. J., Usuda, T., Suto, H., Terada, H., ...
A search for H3+ line emission, reported to have been detected toward the young star HD 141569A and possibly originating in a clump of planet-forming gas orbiting the star, has yielded negative...
CORRELATIONS AMONG DIFFUSE INTERSTELLAR BANDS, ATOMS, AND SMALL MOLECULES (2005)
McCall, Benjamin J., Adamkovics, M., Rachford, B. L., Snow, T. P., Friedman, S. D., Sonnentrucker, P., ...
[2]{ J. A. Thorburn, L. M. Hobbs, B. J. McCall, T. Oka, D. E. Welty, S. D. Friedman, T. P. Snow, P. Sonnentrucker, and D. G. York, {\em Astrophys. J.[3]{ G. H. Herbig, {\em Astrophys. J.[4]{ S. R....
HOT AND DIFFUSE CLOUDS NEAR THE GALACTIC CENTER PROBED BY METASTABLE H$_3^+$ (2005)
Oka, T., Geballe, T. R., Goto, Miwa, Usuda, Tomonori, McCall, Benjamin J.
{T. Oka and E. Epp, ApJ, 613, 349 (2004)
NON-THERMAL ROTATIONAL DISTRIBUTION OF INTERSTELLAR $H^{+}_{3}$ (2004)
$^{a}$ M. Goto, B. J. McCall, T. R. Geballe, T. Usuda, N. Kobayashi, H. Terada and T. Oka, PASJ 54, 951 (2002) $^{b}$ T. R. Geballe, and T. Oka, unpublished $^{c}$ J. K. G. Watson, J. Mol. Spectrosc....
Tarsitano, C. G., Neese, Christopher F., Oka, T.
Author Institution: Department of Chemistry, University of Chicago; Department of Astronomy and Astrophysics, and the Enrico Fermi Institute, University of Chicago
DETECTION OF THE NEAR-INFRARED SPECTRUM OF $CH_{2}{^{+}}$ (2004)
Gottfried, Jennifer L., Oka, T.
$^{a}$M. R\""{o}sslein, C.M. Gabrys, M.-F. Jagod, and T. Oka, J. Mol. Spectrosc. 153, 738 (1992) $^{b}$P. Jensen, M. Brumm, W.P. Kraemer, and P.R. Bunker, J. Mol. Spectrosc. 172, 194 (1995) $^{c}$S....
$CH^{+}$ AND CH EMISSION FROM THE RED RECTANGLE (2004)
Hobbs, L. M., Thorburn, J. A., York, Donald G., Oka, T., Snow, T. P., Barentine, John
$^{a}$ S. P. Balm and M. Jura, A\&A 261 L25 (1992) $^{b}$F. R. Ornellas and F. B. C. Machado, J. Chem. Phys. 84 1296 (1986) $^{c}$H. Sun and K. F. Freed, J. Chem. Phys. 88 2659 (1988)
ABSORPTION LINE SURVEY OF $H_{3}^{+}$ TOWARD THE GALACTIC CENTER (2003)
Goto, Miwa, McCall, Benjamin J., Geballe, T. R., Oka, T., Usuda, Tomonori
Author Institution: Subaru Telescope, 650, North A'ohoku Place, Hilo HI 96720/Institute for Astronomy, University of Hawaii; Department of Chemistry and Department of Astronomy, University of...
INTERSTELLAR $H^{+}_{3}$ IN METASTABLE ROTATIONAL LEVELS (2003)
$^{a}$M. Goto, B. J. McCall, T. R. Geballe, T. Usuda, N. Kobayashi, H. Terada and T. Oka, PASJ 54, 951 (2002) $^{b}$J. K. G. Watson, J. Mol. Spectrosc. 40, 536 (1971) $^{c}$F. S. Pan and T. Oka, ApJ...
THE APACHE POINT ATLAS OF DIFFUSE INTERSTELLAR $BANDS^{a}$ (2003)
York, Donald G., Thorburn, J. A., Chapman, Sarah, Hobbs, L. M., Oka, T., Recchi, Benjamin C., ...
$^{a}$Based on observations from the APO 3.5-meter telescope, owned and operated by the Astrophysical Research Consortium.
CORRELATIONS AMONG THE DIFFUSE INTERSTELLAR $BANDS^{a}$ (2003)
McCall, Benjamin J., Rachford, B. L., Snow, T. P., Friedman, S. D., Sonnentrucker, P., Thorburn, J. A., ...
$^{a}$Based on observations from the APO 3.5-meter telescope, owned and operated by the Astrophysical Research Consortium.
DIFFUSE INTERSTELLAR BANDS CORRELATED WITH CARBON MOLECULES $C_{2}$ and $C_{3}$ (2003)
Thorburn, J. A., Hobbs, L. M., Oka, T., Welty, D. E., York, Donald G., McCall, Benjamin J., ...
$^{a}$J. A. Thorburn, L. M. Hobbs, B. J. McCall, T. Oka, D. E. Welty, S. D. Friedman, T. P. Snow, P. Sonnentrucker and D. G. York, ApJ 584, 339 (2003) $^{b}$T. Oka, J. A. Thorburn, B. J. McCall, S....
York, Donald G., Thorburn, J. A., Hobbs, L. M., Oka, T., Welty, D. E., Snow, T. P., ...
$^{a}$Based on observations from the APO 3.5-meter telescope, owned and operated by the Astrophysical Research Consortium.
Tarsitano, C. G., Neese, Christopher F., Oka, T.
$^{a}$A. O'Keefe, R. Derai, and M. T. Bowers, Chem. Phys. 91, 161 (1984) $^{b}$M. R\""{o}sslein, M. Wyttenbach, and J. P. Maier, J. Chem. Phys. 87, 6770 (1987) $^{c}$J. P. Maier and M. R\""{o}sslein,...
McCall, Benjamin J., Huneycutt, A. J., Casaes, R., Saykally, R. J., Lindsay, C. Michael, Oka, T., ...
$^{a}$email: bjmccall@astro.berkeley.edu
Shizuma, K, Endo, S, Hoshi, M, Takada, J, Ishikawa, M, Iwatani, K, ...
Absorption Line Survey of H3+ toward the Galactic Center Sources I. GCS 3-2 and GC IRS3 (2002)
Goto, M., McCall, B. J., Geballe, T. R., Usuda, T., Kobayashi, N., Terada, H., ...
We present high-resolution (R = 20000) spectroscopy of H3+ absorption toward the luminous Galactic center sources GCS 3-2 and GC IRS 3. With the efficient wavelength coverage afforded by Subaru IRCS,...
FURTHER STUDIES ON SHARP TRANSITIONS INDUCED IN SOLID PARAHYDROGEN BY METHANE (2002)
Lindsay, C. Michael, Oka, T., Momose, Takamasa
Author Institution: Department of Chemistry, The University of Chicago; Department of Astronomy \& Astrophysics, and the Enrico Fermi Institute, The University of Chicago; Division of Chemistry,...
ULTRAHIGH RESOLUTION SPECTROSCOPY OF FROZEN VAN DER WAALS MOLECULES IN PARA-HYDROGEN CRYSTALS (2002)
Oka, T., Zhang, Yu, Lindsay, C. Michael, Momose, Takamasa
$^{a}$Y. Zhang, T. J. Byers, M.-C. Chan, T. Momose, K. E. Kerr, D. P. Weliky and T. Oka, Phys. Rev. B58, 218, (1998) $^{b}$T. Momose, C. M. Lindsay, Y. Zhang and T. Oka, Phys. Rev. Lett. 86, 4795,...
OBSERVATIONS OF $H^{+}_{3}$ IN THE DIFFUSE INTERSTELLAR MEDIUM (2002)
McCall, Benjamin J., Geballe, T. R., Hinkle, Kenneth H., Goto, Miwa, Kobayashi, N., Terada, H., ...
$^{a}$ B. J. McCall, T. R. Geballe, K. H. Hinkle, and T. Oka, Science 279, 1910 (1998) $^{b}$ T. R. Geballe, B. J. McCall, K. H. Hinkle, and T. Oka, Astrophysical Journal 522, 338 (1999) $^{c}$ B. J....
HIGH-RESOLUTION NEAR-INFRARED SPECTROSCOPY OF $H^{+}_{3}$ ABOVE THE BARRIER TO LINEARITY (2002)
Gottfried, Jennifer L., McCall, Benjamin J., Oka, T.
$^{a}$C. M. Lindsay and B. J. McCall, J. Mol. Spectrosc. 210, 60 (2001). $^{b}$A. Alijah, P. Schiffels, and J. Hinze, manuscript in preparation, (2001). $^{c}$L. Neale, S. Miller, J. Tennyson,...
$^{a}$A. Meinel, Astrophys. J. 112, 562 (1950) and 114, 431 (1951).
OBSERVATIONS OF INTERSTELLAR $C_{3}$ IN TRANSLUCENT SIGHTLINES (2002)
Oka, T., Thorburn, J. A., Hobbs, L. M., Welty, D. E., York, Donald G., McCall, Benjamin J., ...
$^{a}$J. P. Maier, N. M. Lakin, G. M. Walker and D. A. Bohlender Astrophys. J. 553, 267 2001 $^{b}$B. J. McCall et al., this meeting
PRELIMINARY RESULTS FROM THE APO DIFFUSE INTERSTELLAR BAND $SURVEY^{a}$ (2002)
McCall, Benjamin J., Rachford, B. L., Snow, T. P., Sonnentrucker, P., Friedman, S. D., Thorburn, J. A., ...
$^{a}$Based on observations from the APO 3.5-meter telescope, owned and operated by the Astrophysical Research Consortium.
SPECTROSCOPY OF HIGHLY EXCITED $HCNH^{+}$ USING INFRARED HETERODYNE VELOCITY MODULATION (2002)
Lindsay, C. Michael, Neese, Christopher F., Oka, T.
$^{a}$R. S. Altman, M. W. Crofton, and T. Oka, J. Chem. Phys, 80, 3911 (1984) and 81, 4255 (1984). $^{b}$L. M. Ziurys and B. E. Turner, Astrophys J., 302, L31 (1986). $^{c}$See talk entitled...
INFRARED LASER ABSORPTION SPECTROSCOPY WITH HETERODYNE DETECTION (2002)
Lindsay, C. Michael, Neese, Christopher F., Oka, T.
Author Institution: Department of Chemistry, The University of Chicago; Department of Astronomy \& Astrophysics, and the Enrico Fermi Institute, The University of Chicago
Shizuma, K, Endo, S, Hoshi, M, Takada, J, Iwatani, K, Hasai, H, ...
Observations of H3+ in the Diffuse Interstellar Medium (2001)
McCall, B. J., Hinkle, K. H., Geballe, T. R., Moriarty-Schieven, G. H., Evans II, N. J., Kawaguchi, K., ...
Surprisingly large column densities of H3+ have been detected using infrared absorption spectroscopy in seven diffuse cloud sightlines (Cygnus OB2 12, Cygnus OB2 5, HD 183143, HD 20041, WR 104, WR...
Rejection of the C7- Diffuse Interstellar Band Hypothesis (2001)
McCall, B. J., Thorburn, J., Hobbs, L. M., Oka, T., York, D. G.
Using the new high resolution (~ 8 km/s) echelle spectrograph on the 3.5-m telescope at the Apache Point Observatory, we have begun a high sensitivity survey of the diffuse interstellar bands in a...
Atomic Carbon and CO Isotope Emission in the Vicinity of DR15 (2001)
Oka, T., Yamamoto, S., Iwata, M., Maezawa, H., Ikeda, M., Ito, T., ...
We present observations of the 3P1-3P0 fine structure transition of atomic carbon [CI], the J=3-2 transition of CO, as well as of the J=1-0 transitions of 13CO and C18O toward DR15, an HII region...
$H_{3}^{+}$ IN THE DIFFUSE INTERSTELLAR MEDIUM TOWARD HD183143 (2001)
McCall, Benjamin J., Geballe, T. R., Hinkle, Kenneth H., Evans, N. J., Moriarty-Schieven, G. H., Takano, S., ...
$^{a}$B. J. McCall, T. R. Geballe, K.H. Hinkle and T. Oka Science 279, 1910 1998. $^{b}$T. R. Geballe, B. J. McCall, K. H. Hinkle and T. Oka ApJ.522, 338 1999. $^{c}$J. H. Black Phil. Trans. R. Soc....
IS $C^{-}_{7}$ REALLY A DIFFUSE INTERSTELLAR BAND CARRIER? (2001)
McCall, Benjamin J., York, Donald G., Oka, T.
$^{a}$Supported by the Fannie and John Hertz Foundation $^{b}$M. Tulej, D. A. Kirkwood, M. Pachkov, \& J. P. Maier, Astrophysical Journal Letters 506, L69 (1998) $^{c}$B. J. McCall, D. G. York, \& T....
A deep submillimetre survey of the Galactic Centre (2000)
Pierce-Price, D., Richer, J. S., Greaves, J. S., Holland, W. S., Jenness, T., Lasenby, A. N., ...
We present first results from a submillimetre continuum survey of the Galactic Centre `Central Molecular Zone' (CMZ), made with SCUBA on the James Clerk Maxwell Telescope. SCUBA's scan-map mode has...
A deep submillimetre survey of the Galactic Centre (2000)
Pierce-Price, D., Richer, J. S., Greaves, J. S., Holland, W. S., Jenness, T., Lasenby, A. N., ...
We present first results from a submillimetre continuum survey of the Galactic Centre `Central Molecular Zone\' (CMZ), made with SCUBA on the James Clerk Maxwell Telescope. SCUBA\'s scan-map mode has...
Momose, Takamasa, Michael, C. Lindsay, Zhang, Yu, Oka, T.
$^{a}$T. Momose, K. E. Kerr, D. P. Weliky, C. M. Gabrys, R. M. Dickson, and T. Oka, J. Chem. Phys. 100, 7840(1994).
SURVEY OF $H^{+}_{3}$ TRANSITIONS BETWEEN 3000 AND $4200 CM^{-1}$ (2000)
Lindsay, C. Michael, Rade, Ronald M., Oka, T.
$^{a}$J. K. G. Watson, private communication.
A deep submillimetre survey of the Galactic Centre (2000)
Pierce-Price, D., Richer, J. S., Greaves, J. S., Holland, W. S., Jenness, T., Lasenby, A. N., ...
We present first results from a submillimetre continuum survey of the Galactic Centre `Central Molecular Zone\' (CMZ), made with SCUBA on the James Clerk Maxwell Telescope. SCUBA\'s scan-map mode has...
Synthetic absorbable film for prevention of air leaks after stapled pulmonary resection (2000)
Itoh, E, Matsuda, S, Yamauchi, K, Oka, T, Iwata, H, Yamaoka, Y, ...
A Dark Cloud Associated an Unidentified EGRET Source (1999)
Oka, T., Kawai, N., Naito, T., Horiuchi, T., Namiki, M., Saito, Y., ...
CO J=1-0 mapping observations of the dark nebula Lynds 227, which is possibly associated with the unidentified EGRET source 2EG J1811-2339, are presented. We detected a large amount of molecular gas...
THE INFRARED SPECTRUM OF $H^{+}_{3}$ IN SPACE PLASMAS (1999)
$^{a}$ T.R. Geballe, and T. Oka, Nature 384, 334 (1996). $^{b}$ B.J. McCall, T.R. Geballe, K.H. Hinkle and T. Oka, Science 279, 1910 (1998). $^{c}$ B.J. McCall, T.R. Geballe, K.H. Hinkle and T. Oka,...
$C^{-}_{7}$ AND THE DIFFUSE INTERSTELLAR BANDS (1999)
McCall, Benjamin J., York, Donald G., Oka, T.
$^{a}$ Supported by the Fannie and John Hertz Foundation $^{b}$ A.E. Douglas, Nature 269, 130, (1977). W.H. Smith, T.P. Snow, and D.G. York, Astrophys. J. 218, 124 (1977) $^{c}$ M. Tulej, D.A....
Lindsay, C. Michael, White, E. T., Oka, T.
Author Institution: Department of Chemistry, Department of Astronomy and Astrophysics
A Large-scale CO Imaging of the Galactic Center. II. Dynamical Properties of Molecular Clouds (1998)
Oka, T., Hasegawa, T., Sato, F., Tsuboi, M., Miyazaki, A.
The data from the Nobeyama Radio Observatory 45 m telescope Galactic Center CO survey have been analyzed to generate a compilation of molecular clouds with intense CO emission in this region. Clouds...
A High Velocity Cloud near the Center of the Galaxy (1998)
Oka, T., White, G. J., Hasegawa, T., Sato, F., Tsuboi, M., Miyazaki, A.
We report the detection of a peculiar molecular cloud, CO 0.02-0.02, lying about 5' Galactic-east from the center of the Galaxy. (12)CO images taken with NRO 45 m telescope showed that it is...
OVERTONE AND COMBINATION BAND SPECTROSCOPY OF $H^{+}_{3}$ (1998)
McCall, Benjamin J., Huet, T. R., Watson, J. K. G., Oka, T.
$^{a}$ Supported by the Fannic and John Hertz Foundation
OBSERVATION OF $H^{+}_{3}$ IN THE DIFFUSE INTERSTELLAR MEDIUM (1998)
McCall, Benjamin J., Geballe, T. R., Hinkle, Kenneth H., Oka, T.
$^{a}$ Supported by the Fannic and John Hertz Foundation $^{b}$ T.R. Gehalle and T. Oka, Nature 384, 334 (1996) $^{c}$ B.J. McCall, T.R. Geballe, K.H. Hinkle, and T. Oka, Science, in press
INFRARED SPECTRUM OF THE $\nu_{1}$ FUNDAMENTAL BAND OF $H_{3}O^{+}$ (1998)
$^{a}$ W.C. Ho, C.J. Pursell, and T. Oka, J. Mol. Spectrosc. 149, 530 (1991).
INFRARED SPECTROSCOPY OF $CH^{+}_{5}$ (1998)
White, E.T., Tang, J., Oka, T.
$^{a}$ P.R. Schreiner, S.-J., Kim, H.F. Schaefer III, and P. von Ragu\'{e} Schleyer, J. Chem. Phys. 99, 3716 (1993) $^{b}$ P.R. Bunker, J. Mol. Spectrosc. 176, 297 (1996) $^{c}$ J.C. Owrutsky, Ph.D....
Describing a Modular Motion System based on a Real Time Process Network Model (1997)
The brain of an autonomous robot generates signals to the motors in each situation of the dynamical real world to achieve various tasks. The designer of it has to describe a complex system that maps...
Describing a Modular Motion System based on a Real Time Process Network Model (1997)
The brain of an autonomous robot generates signals to the motors in each situation of the dynamical real world to achieve various tasks. The designer of it has to describe a complex system that maps...
Astros - A Telescope Control System For A Small Radio Telescope (1997)
T. Handa, T. Hasegawa, J. I. Morino, T. Oka, K. Sato, K. Sorai, ...
We developed a telescope control system called ASTROS for the VST1 and VST2, which are specially designed radio telescopes to make a survey and have a 60-cm main dish. ASTROS is designed on the...
HIGH-SENSITIVE SUB-MILLIMETER WAVE SPECTROSCOPY OF IONS AND FREE RADICALS (1997)
$^{m}$See, for example, S. P. Below, F. Lewen, Th. Klaus, and G. Winnewisser, J. Mol. Spectrosc. 174, 606 (1995).
DETECTION OF INTERSTELLAR $H^{+}_{3}$ (1997)
$^{m}$T. Oka, {Phil. Trans. R. Soc. Lond}. A303, 543 (1981) $^{n}$T.R. Geballe and T. Oka, {Astrophys. J}. 342, 855 (1989) $^{o}$T.R. Geballe and T. Oka, {Nature} 384, 334 (1996)
OBSERVATION OF INTERSTELLAR $H^{+}_{3}$ (1997)
McCall, Benjamin J., Hinkle, Kenneth H., Geballe, T. R., Oka, T.
$^{a}$Suppoorted by the Fannie and John Hertz Foundation $^{b}$T.R. Geballe and T. Oka, {Nature} 384, 334 (1996)
Cordonnier, M., Uy, Dairene, Zhang, Yu, Oka, T.
Author Institution: Laboratoire de Spectroscopie Hertzienne Associ\'e au C.N.R.S, U.F.R. de Physique; JILA; Department of Chemistry and Department of Astronomy and Astrophysics
Takagi, Kojiro, Matsushima, F., Oka, T.
Author Institution: Department of Physics, Toyama University; Department of Chemistry, Department of Astronomy and Astrophysics, The University of Chicago
OBSERVATION OF THE CH STRETCH BAND OF $CH^{-}_{3}$ (1997)
White, E. T., Tang, Jian, Oka, T.
$^{m}$P. R. Schreiner, S.-J. Kim, H. F. Schaefer III, and P. von Ragu\'e Schieyer, {J. Chem. Phys}. 99, 3716 (1993) $^{n}$P.R. Bunker. {J. Mol. Spectrosc}. \textbf{176}, 297 (1996) $^{o}$D.W. Boo and...
Chan, Man-Chor, Zhang, Yu, Oka, T.
$^{h}$E. U. Condon, {Phys. Rev}. \textbf{41}, 759 (1932). $^{i}$K. E. Kerr, T. Momose, W.P. Weliky, C. G. Gabrys, and T. Oka, {Phys. Rev. Lett}. \textbf{72}, 3957 (1994).
Designing Asynchronous Parallel Process Networks for Desirable Autonomous Robot Behaviors (1996)
T. Oka, K. Takeda, M. Inaba, H. Inoue
The behavior of an autonomous robot is generated by the dynamics of the interaction between the brain and the environment. The designer of the brain must describe and actualize a system that makes a...
$^{a}$T. R. Geballe, M.-F. Jagod, and T. Oka, Astrophys, J. 408, L109-L112 (1993).$^{b}$J.-P. Maillard, P. Drossart, J. K. G. Watson, S. J. Kim, J. Caldwell, Astrophys. J. 363, L37-L41 (1990).
Uy, Dairene, Cordonnier, M., Dickson, Robert M., Kerr, Karen E., Oka, T.
$^{*}$Laboratoire de Spectroscopie Hertzienne Universit\'{e} des Sciences et Technologies de Lille 59655 Villeneuve d'Ascq, France $^{1}$Quack, M. Mol. Phys. 34, 377, 1977.