SESSION TP: POSTER SESSION II

Thursday afternoon, 18 May 1995 McLennan Physical Laboratory Rooms 125 and 126 at 15:30 A.D. May, presiding

RYDBERG ATOMS: THEORY
TP 1 Classical Sepf-Ionization of Fast Atomic Ions in Magnetic Fields. P. Schmelcher, Department of Physics, University of California, St. Barbara.

TP 2 Dimensional Perturbation Theory and Circular Rydberg States of the Hydrogen Atom in a Magnetic Field. J.R. Walkup, M. Dunn, D.K. Watson, Univ. of Oklahoma; T.C. Germann, D.R. Herschbach, Harvard University.

TP 3 Floquet Analysis of Inelastic Ion-Atom Collisions. M.J. Cavagnero, Univ. of Kentucky.

TP 4 Three-Swap Electron Capture for Ion Collisions with Circular Rydberg Atoms Near the Matching Velocity. D.M. Homan, J.C. Day, M.J. Cavagnero, D.A. Harmin, K.B. MacAdam, Univ. of Kentucky.

TP 5 Alignment Effects in Rydberg Ca - Rare Gas Scattering. W.A. Isaacs, M.A. Morrison, University of Oklahoma, Norman.

TP 6 Interaction Potential between a Rydberg Electron and an Open Shell Ion. William Clark and Chris H. Greene, JILA, and Dept. of Physics, Univ. of Colorado, Boulder, CO.

TP 7 State-Changing Collisions of Low-Rydberg Na Atoms in Collisions with He Atoms. B.C. Saha, N.F. Lane, Rice University; and M. Kimura, Argonne National Laboratory.

TP 8 Near Integrability of Rydberg H Atoms in Circularly Polarized Microwave Fields and Ionization Threshold Law. M.J. Rakovic and S.I. Chu, Univ. of Kansas.

TP 9 Collisional depopulation of non-hydrogenic Rydberg levels in Na. M. Syrkin, SUNY Maritime College.

TP 10 Multiphoton Ionization of Rydberg Wavepackets by Strong Microwave Fields. T.F. Jiang, National Chiao Tung Univ. Taiwan; M. Mallalieu and S.I. Chu, Univ. of Kansas.

COLD ATOMS AND IONS
TP 11 1D Colling of a Rb Atomic beam with Intense Laser Fields in the Lin \perp Lin Configuration. M. Williams, C. Xie, T. Boley, W. Buell, T. Bergeman and H. Metcalf, SUNY Stony Brook.

TP 12 Quantum Phenomena in Laser Cooling. M.J. Bellanca, M. Widmer, F.N. Chi, M. Doery, W. Buell, T. Bergeman and H. Metcalf, SUNY Stony Brook.

TP 13 High-Resolution Photoassociative Spectrum of Ultracold Li. R. Cote, A. Dalgarno, Y. Sun, Harvard-Smithsonian Center for Astrophysics; E.R. I. Abraham, W.I. McAlexander, and R.G. Hulet, Rice University.

TP 14 Laser Guided Atoms in Hollow Core Optical Fibers. M.J. Renn, O. Vdovin, D.Z. Anderson, C.E. Wieman, and E.A. Cornell, JILA, Univ. of Colorado-Boulder and NIST.

TP 15 Semiclassical and Quantum Calculations of 1D Lin \perp Lin Cooling in Intense Laser Fields. C. Xie and T. Bergeman, SUNY Stony Brook.

TP 16 New Phenomena in Dark States. M. Widmer, M. Doery, M-J. Bellanca, W. Buell, T. Bergeman, and H. Metcalf, SUNY Stony Brook.

TP 17 Population Accumulation in Dark States and Sub-recoil Laser Cooling. M. Doery, E. Vredenbregt 1, M. Widmer, M. Bellanca, W. Buell, T. Bergeman, and H. Metcalf, SUNY Stony Brook. 1=Physics Department, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven.

TP 18 Probe transmission in a 2D optical lattice. J. Guo, JILA, University of Colorado.

TP 19 Atom Echo. Chang Jae Lee, Sunmoon University.

TP 20 Numerical Studies of the Kinetics of Many-Body Systems. William Hoston, ITAMP, Harvard-Smithsonian CFA.

TP 21 Production of Cold Highly Charged Ions for Spectroscopic Studies. P. Beiersdorfer, V. Decaux, K. Widmann, S. Elliott, LLNL.

TP 22 Visible Light from Highly Charged Ions in EBIT. J.R. Crespo Lopez- Urrutia, P. Beiersdorfer, K. Widmann, and V. Decaux, LLNL.

PHOTODETACHMENT, PHOTODISSOCIATION AND PHOTOIONIZATION
TP 23 Eigenchannel R-matrix Calculation for the photodetachment of $He^- (^4P\degrees)$. Hsiao-Ling Zhou 1, Francis Robicheaux 2, and Steven T. Manson 1. 1=Georgia State University; 2=Auburn University.

TP 24 Resonances and Cooper Minima in the Photodetachment of 1s2s2p^4P State of He^-. D.-S. Kim, H.-L. Zhou, and Steven T. Manson, Georgia State University.

TP 25 Photodetachment of Li^- Above the Li 3s Threshold. Cheng Pan and Anthony F. Starace, The U. of Nebraska-Lincoln; and Chris H. Greene, JILA and U. of Colorado-Boulder.

TP 26 Electron Wave Packets and Ramsey Interference in a Magnetic Field. J.N. Yukich, C.T. Butler and D.J. Larson, University of Virginia.

TP 27 Photodissociation of the H_3 Molecule. U. Muller, A. Dykman, and P.C. Cosby, SRI International, Menlo Park, CA.

TP 28 Formation and Destruction Processes of LiH and LIH^+ in the Early Universe. K. Kirby 1, P.C. Stancil 2, and A. Dalgarno 1. 1=Harvard- Smithsonian Center for Astrophysics; 2=Depart. of Physics, University of Nevada Las Vegas.

TP 29 Competing predissociation and preionization in the photoabsorption of molecular hydrogen. J.A. Stephens and Chris H. Greene, JILA, and Dept. of Physics, Univ. of Colorado, Boulder, CO.

TP 30 Decay of C ls Excitations in Ch_4. S.P. Frigo, A. Menzel, and C.D. Caldwell, Univ. of Central Florida.

TP 31 Decay Paths of Two-Electron Excitations in Helium. A. Menzel, S.P. Frigo, S.B. Whitfield, C.D. Caldwell, Univ. of Central Florida; M.O. Krause, ORNL.

TP 32 Photodissociation of the $O_{2}^{+} b \leftarrow a$ system by FIBLAS: Observation of high J values in the v'=2,3,4 and 5 vibrational levels. M. Larzilliere, C. Frigon, C.J. Delisle and P.C. Cosby, Universite Laval, Quebec, Canada.

SPECTROSCOPY OF MOLECULES OF EXCIMERS
TP 33 Translationally cold vibrationally hot molecules. Robin Cote and A. Dalgarno, ITAMP, Harvard-Smithsonian Cfa.

TP 34 Line-Mixing in the Raman Q Branch of D_2 at 100.7K. Guy D. Sheldon, S. Hamid Fakhr-Eslam, J.R. Drummond, and A.D. May, University of Toronto.

TP 35 On the Electronic Bond Structure of the $H_2^+$-Ion in a Strong Magnetic Field. P. Schmelcher, U. Kappes, Department of Physics, University of California, St. Barbara.

TP 36 Optically Pumped Laser emission in K_2 Originating Near the Dissociation Limit of the $B^1\Pi_u$ Electronic State. B.K. Clark, Z.J. Smolinski, A.D. Glueck, J.M. Standard, and J.R. Flemming, Illinois State Univ.

TP 37 Kerr Effect Measurements in He, Ne H_2 and N_2 Using an Intracavity Polarimeter. Steven C. Read and A.D. May, University of Toronto.

TP 38 An Investigation of Multistate Interactions in NO with Laser-Induced Grating Spectroscopy. E.F. McCormack, S.T. Pratt, P.M. Dehmer, and J.L. Dehmer, Argonne National Laboratory.

TP 39 Theoretical Resonant Raman Spectroscopy of O_2. I. Simbotin, M. Marinescu, H.R. Sadeghpour, and A. Dalgarno, Harvard-Smithsonian Center for Astrophysics, Cambridge, MA.

TP 40 Q Branch Measurements of CO_2 Line Mixing in the v3 Band at 2076cm^1. R. Berman, P. Duggan, J.R. Drummond and A.D. May, University of Toronto.

TP 41 Polarization Dynamics of the Quasi-isotropic Helium Neon Zeeman Laser. E. Sjerve, G. Stephan 1, and A.D. May, University of Toronto. 1=University of Rennes, France.

TP 42 New IR Emission Spectra from Cryogenic Proton-irradiated Helium Gas. R.L. Brooks, D.W. Tokaryk, G.R. Wagner, J.L. Hunt, ^2, Guelph, Ontario, Canada.

TP 43 Argon Excimer Emission from a Discharge Excited Slit Supersonic Expansion. M. Deebel, R.E. Miers, M.F. Masters, Indiana-Purdue Univ., Fort Wayne.

TP 44 Excitation and Fluorescence Spectra of ZnNe and ZnAr van der Waals Molecules. J. Koperski and M. Czajkowski, Dept. of Physics, University of Windsor.

TP 45 Krypton Excimer Emission from a Discharge Excited Supersonic Expansion. M.F. Masters, Indiana-Purdue Univ., Fort Wayne; J.E. Tucker, B.L. Wexler, S.K. Searles, Naval Research Laboratory.

TP 46 Laser-rf Saturation Spectroscopy. R.A. Holt, T.J. Scholl, and S.D. Rosner, Univ. of Western Ontario.

TP 47 Laser-Radiofrequency Double Resonance Spectroscopy of YbF. B.E. Sauer, Jun Wang, E.A. Hinds, Physics Dept., Yale Univ.

TP 48 Structure and dynamics of argon complexes with formic acid and acetaldehyde. Ioannis I. Ioannou, Robert L. Kuczkowski, Department of Chemistry, University of Michigan.

ELECTRON-ATOM COLLISION EXPERIMENTS
TP 49 Scattering Angle Dependence of Cadmium (e,2e) Energy Spectra. R.P. Bauman, D.B. Thompson, N.L.S. Martin, Univ. Kentucky, USA and M. Wilson, Royal Holloway, University of London, UK.

TP 50 Elastic Scattering of Low Energy Electron by a Polarized Excited Na. Z. Shi, C.H. Ying, New York U.; H. Wei, L. Vuskovic, Old Dominion U.

TP 51 Electron Scattering from Laser-Excited Ytterbium. Y. Li, P.W. Zetner, Department of Physics, University of Manitoba, Canada.

TP 52 Measurements of Electron-Impact Excitation of Argon by Fourier Transform Spectroscopy. John B. Boffard, Jeffrey E. Chilton, Mark E. Lagus, R.Scott Schappe, and Chun C. Lin, U. of Wisconsin.

TP 53 Cross Sections for Electron Excitation out of the Metastable levels into the 3^3D, 4^3D, and 3^3S Levels of Helium Using a Fast Beam Target. Mark E. Lagus, John B. Boffard, L.W. Anderson, and Chun C. Lin, U. of Wisconsin.

TP 54 Electron Impact out of the 2^3S Metastable level of He into Higher Triplet Levels. Garrett A. Piech, R.B. Lockwood, L.W. Anderson and Chun C. Lin, U. Wisconsin-Madison.

TP 55 Polarization measurements of the Degree of Polarization of He\Pi L\alpha Radiation Following Electron Impact on Helium. M. Bailey, A. Vasilyev, R. Bruch, Department of Physics, University of Nevada, Reno; A. Shevelko, Lebedev Physical Institute, Moscow, Russia.

TP 56 A Novel Approach to Measuring Inelastic Differential Cross Sections for Electron-Molecule Collisions. L.R. LeClair, S. Trajmar, M.A. Khakoo, and J.C. Nickel, JPL, Pasadena, CA.

ELECTRON-MOLECULE COLLISIONS
TP 57 Analysis of Optical Emissions and Mass Spectra Produced by Controlled Electron Impact on Si-Organic Molecules. P. Kurunczi, J.-P. Michel, N. Abramzon, K. Becker, City College of CUNY, and R. Basner, M. Schmidt, INP, Greifswald, Germany.

TP 58 Small-Angle Electron Cross Sections for the Fourth Positive Band of CO and for $CO_2 1s(2\sigma_g)\rightarrow 2\Pi_u$. I. Fomunung, Z. Chen, A.Z. Msezane, Clark Atlanta University.

TP 59 Thermal Electron Attachment to MoF_6. Thomas M. Miller, Jeffrey F. Friedman, Amy E.S. Miller, and John F. Paulson, USAF Phillips Laboratory, Geophysics Directorate.

TP 60 New model for electron impact ionization cross sections of molecules. W. Hwang, Y.-K. Kim, NIST; and M.E. Rudd, Univ. of Nebraska-Lincoln.

TP 61 Angular Distribution of Molecular Auger Electrons Emitted Following Electron Impact Ionization in Nitrogen. Q. Zheng, A.K. Edwards, R.M. Wood, M.A. Mangan, Univ. of Georgia, Athens, Georgia.

TP 62 Optical Emission Cross Sections for Electron Impact Excitation of the Second Positive Band System $(C ^\Pi_u \rightarrow B ^3\Pi_g)$ of the Nitrogen Molecule. John T. Fons, R. Scott Schappe, and Chun C. Lin, U. of Wisconsin-Madison.

TP 63 Rotational Excitation in Resonant and Near-Threshold Low-Energy e-N_2 Scattering. W.K. Trail, W.A. Isaacs, W. Sun, M.A. Morrison, University of Oklahoma, Norman.

TP 64 Born-Completion in the Calculation of Differential Cross Sections for Elastic Electron - Non-Polar Molecule Scattering. M.A. Morrison, W.A. Isaacs, University of Oklahoma, Norman.

TP 65 Spectral studies of electron break-up of the light Alkanes. A. Iwamae, P. Erman, E. Rachlew and H.G. Berry, Department of Physic I, Royal Institute of Technology, Stockholm, Sweden.

ELECTRON-CAPTURE COLLISIONS
TP 66 A New Diabatic-by-Sector MO/AO Matching Method for Ion-Atom Collisions. Jiyun Kuang and C.D. Lin, Macdonald Lab, Physics Dept., Kansas St. U., Manhattan, KS.

TP 67 Translational Energy Spectroscopy of Single-Electron Capture in Collisions of Ar^4+ and Ar^5+ Ions With Ne. K. Akgungor, E.Y. Kamber, S.M. Ferguson, Physics Dept., Western Mich. Univ., Kalamazoo, MI.

TP 68 Calculation of Charge Transfer Cross Sections in Collisions of the Ground state Mg Atom with H^+ in low keV Collision Energies. C.M. Dutta, and P. Nordlander, Rice University; and M. Kimura, Argonne National Laboratory.

TP 69 Electron Transfer, Target Excitation, and Ionization in Alpha- Particle Collisions with Na(3s) Atoms at 2-50 keV/amu in the Coupled- Sturmian-Pseudostate Approach. Ashok Jain and T.G. Winter, Pennsylvania State Univ., Wilkes-Barre Campus.

TP 70 Effects of Initial Orbital Alignment for Electron Capture in $He^{++} + H(2p)$ Collisions. Bidhan C. Saha, Charles A. Weatherford, Rodney Scott and Herbert W. Jones, Department of Physics, Florida A&M University, Tallahassee, FL.

TP 71 Low-Energy Electron Capture from Collisions of Si^3+ and Si^4+ with He. N.J. Clarke 1, P.C. Stancil 2, B. Zygelman 2, and D.L. Cooper 1. 1= Department of Chemistry, University of Liverpool; 2= Department of Physics, University of Nevada Las Vegas.

TP 72 Electron Capture in Slow Collisions of N^+4 with Hydrogen. B. Zygelman 1, N.J. Clarke 2, and D.L. Copper 2. 1= Department of Chemistry, University of Liverpool; 2= Department of Physics, University of Nevada Las Vegas.

TP 73 Measurements of Electron Capture by Si^4+ from Deuterium at Near- Thermal Collision Energies. C.C. Havener, M.E. Minear, and M. Pieksma, ORNL.

TP 74 A Theoretical Study of Electron Capture and Excitation to the n=2 states of H in $H^{+}-H$ Collisions using Symmetrised Variational Continuum Distorted-Wave Theory. G.J.N. Brown, D.S.F. Crothers, The Queen's University of Belfast, Northern Ireland.

TP 75 Differential Cross Sections for Small-Angle Scattering at 0.1-1.0 keV Energies. L.K. Johnson, Mechanics and Materials Technology Center, The Aerospace Corporation.

TP 76 Relativistic Electron Capture. J.T. Glass, D.S.F. Crothers, The Queen's University of Belfast, Northern Ireland; J.F. McCann, Durham University, England.

HEAVY-PARTICLE COLLISIONS: IONIZATION
TP 77 Electron Spectra Created By Transitions From Autoionizing State To Two Interacting Continua. D.S.F. Crothers, The Queen's University of Belfast, Northern Ireland; A.Z. Devdariani, Yu.N. Sebyakin, St. Petersburg University, Russia.

TP 78 New Theory of Electron Energy and Angular Distribution for Low Energy Ion-Atom Collisions. S.Y. Ovchinnikov and J.H. Macek, Univ. of Tenn. and ORNL.

TP 79 Experimental Study of Quasimolecular Electrons Produced in Multicharged Ion-Atom Collisions. A.P. Shergin, H. Li, X. Da, R. Rejoub, J.K. Swenson, V.V. Afrosimov, and R.A. Phaneuf, University of Nevada, Reno.

TP 80 Transition for q^2 Scaling to an Inverted Scaling of the Cross Section for 0 Degree BE Emission in Ion Atom Collisons. C. Liao 1, S. Hagmann 1, T.J.M. Zouros 1,2; E.C. Montenegro 1,3; P. Richard 1, C.P. Bhalla 1, S. Grabbe 1, and T. Zaepfel 1. 1-Macdonald Lab., Kansas St. U., Manhattan, KS; 2=U. Crete and Inst. of Ele. Structure and Laser, Greece; 3=PUC-Rio, Rio de Janeiro, Brazil.

TP 81 Angular Distribution of Electrons for Heavy Ion on C and Au Targets. T. Zaepfel, C. Liao, S. Hagmann, and P. Richard, J.R. Macdonald Lab., Kansas State Univ., Manhattan, KS.

TP 82 Ionization of H by slow fully stripped ions. M. Pieksma and C.C. Havener, ORNL.

TP 83 Mean Lifetimes of HeH^2+ and its Isotopes. B.D. Esry 1,2; J.P. Bouhnik 3, I Ben-Itzhak 2, Z. Chen 2, I. Gertner 3, C.D. Lin 2, and B. Rosner 3. 1=JILA and Dept. of Physics, Univ. of Colorado, Boulder, CO; 2=J.R. Macdonald Lab, Kansas State Univ., Manhattan, KS; 3=Department of Physics, The Technion, Haifa, 32000, Israel.

TP 84 Ionization and Excitation of Hydrogen Molecules by Fast Proton Impact. I. Ben-Itzhak, V. Krishnamurthi, K.D. Carnes, H. Aliabadi, J.R. Macdonald Lab, Kansas State Univ., Manhattan, KS; H. Knudsen, and U. Mikkelsen, Inst. of Physics and Astronomy, U. of Aarhus, Aarhus, Denmark.

TP 85 Electron + X-Ray Coincidence Studies of Inner-Shell Processes. T.W. LeBrun, Argonne National Laboratory; U. Arp, S.H. Southworth, National Institute of Standards and Technology, Gaithersburg, MD; and M.A. MacDonald, SERC Daresbury Laboratory, Warrington, WA4 4AD, United Kingdom.

ATOMIC STRUCTURE AND SPECTRA
TP 86 Measurement of the 1s2s ^1S_0-1s2p ^3P_1 Wavelength in helium-like nitrogen. E.G. Myers, J.K. Thompson, Florida State U.; J.D. Silver, D.J. Howie, Oxford Univ., U.K.

TP 87 Calculation of the Radiative Transition Energies and Probabilities of Highly Charged Bi^q+ ions (q=71-54). T. Tanaka, R. Bruch, R. Mancini, University of Nevada-Reno; D. Schneider, EBIT, Lawrence Livermore National Laboratory.

TP 88 Mixing nearly degenerate states of highly charged ions. D.G. Ellis and L.J. Curtis, The University of Toledo.

TP 89 Extreme-UV Wavelength and Lifetime Measurements in $Kr^{30+}-Kr^{33+}$. A.E. Livingston, K.W. Kukla, C.M. Vogel Vogt, H.G. Berry, Notre Dame University; R.W. Dunford, Argonne National Laboratory; L.J. Curtis, S. Cheng, University of Toledo.

TP 90 Stark Shift Of The $(6s)^{2} ^{1}S_{o} \rightarrow (6s6p) ^{3}P_{1}$ Ytterbium Transition. J. Li and W.A. Van Wijngaarden, Physics Dept., York University.

TP 91 Analysis of the $(5d^{9}+5d^{8}6s)-[5d^{8} (f+6f+7p)+5d^{7} 6s6p]$ Transitions of Quadruply Ionized Thallium (TlV). S.S. Churilov and Y.N. Joshi, Physics Department, St Francis Xavier University.

TP 92 Analysis of the 5d5f and 6s5f Configurations of Four Times Ionized Tungsten: WV. R.R. Kilkiyarova, S.S. Churilov and Y.N. Joshi, Physics Department, St Francis Xavier University.

TP 93 The 5p^3 configuration in the In-like Ions: Sb III to Cs VII. A. Tauheed 1,2; Y.N. Joshi 1 and E.H. Pinnington 3. 1=Physics Department, St. Francis Xavier; 2= Physics Department, Aligarh Muslim University; 3=Physics Department, University of Alberta.

TP 94 Database for Atomic Spectroscopy (DAS). D.E. Kelleher, NIST, Gaithersburg, MD 20899.