William A. Chupka
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Physics
William A. Chupka's Degrees
- PhD Physics University of Maryland, College Park
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(Suggest an Edit or Addition)William A. Chupka's Published Works
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Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author
Published Works
- Factors affecting lifetimes and resolution of Rydberg states observed in zero-electron-kinetic-energy spectroscopy (1993) (382)
- Effect of Unimolecular Decay Kinetics on the Interpretation of Appearance Potentials (1959) (286)
- Photoionization Study of Ion–Molecule Reactions in Mixtures of Hydrogen and Rare Gases (1968) (264)
- Very high resolution study of photoabsoprtion, photoionization, and predissociation in H2 (1976) (227)
- Direct Determination of the Heat of Sublimation of Carbon with the Mass Spectrometer (1955) (179)
- High resolution study of photoionization processes in O2 (1975) (155)
- Photoionization of HCN: The Electron Affinity and Heat of Formation of CN (1969) (154)
- Ion‐Molecule and Chemi‐ionization Reactions in H2 by Photoionization (1968) (153)
- Photoionization of Ethane, Propane, and n‐Butane with Mass Analysis (1967) (150)
- Electron Affinities of Halogen Diatomic Molecules as Determined by Endoergic Charge Transfer (1971) (140)
- Mass Spectrometric Study of Vapor Ejected from Graphite and Other Solids by Focused Laser Beams (1964) (139)
- High‐Resolution Photoionization Study of the H2 Molecule near Threshold (1969) (129)
- THERMODYNAMIC STUDIES OF SOME GASEOUS METALLIC CARBIDES (1958) (123)
- Photoionization of the Lower Aliphatic Alcohols with Mass Analysis (1968) (117)
- Mass‐Spectrometric Study of the Photoionization of Methane (1968) (116)
- POLYMERIC GASEOUS SPECIES IN THE SUBLIMATION OF MOLYBDENUM TRIOXIDE. Period covered: To June 30, 1956. Technical Report No. 2 on THERMODYNAMICS OF REFRACTORY MATERIALS AS DETERMINED WITH A MASS SPECTROMETER (1956) (115)
- Electronically Excited States of Ethylene (1992) (113)
- Polymeric Gaseous Molecules in the Vaporization of Alkali Halides (1958) (104)
- Photoionization mass spectrometric study of formaldehyde H2CO, HDCO and D2CO (1976) (103)
- Ion-Molecule Reactions of NH3+ by Photoionization (1968) (102)
- Equilibrium Composition of Selenium Vapor; the Thermodynamics of the Vaporization of HgSe, CdSe, and SrSe (1966) (97)
- Surface Ionization Source Using Multiple Filaments (1953) (93)
- Photoelectron Spectroscopy of Autoionization Peaks (1969) (93)
- Threshold Photoelectron Detector for Use in the Vacuum Ultraviolet (1971) (92)
- Photoionization of High‐Temperature Vapors. I. The Iodides of Sodium, Magnesium, and Thallium (1966) (91)
- Lifetimes of very high Rydberg states of aromatic molecules (1993) (90)
- Double‐Oven Experiments with Lithium Halide Vapors (1962) (90)
- Photoionization of molecular Rydberg states: H2, C 1Πu and its doubly excited states (1987) (87)
- Effect of Thermal Energy on Ionization Efficiency Curves of Fragment Ions (1971) (85)
- On the Dissociation Energies of SrO and MgO Molecules (1955) (85)
- Flash pyrolytic production of rotationally cold free radicals in a supersonic jet. Resonant multiphoton spectrum of the 3p2A2" .rarw. X2A2" origin band of methyl (1986) (84)
- Electron Affinities of O2, O3, NO, NO2, NO3 by Endothermic Charge Transfer (1971) (83)
- Vaporization of Beryllium Oxide and Its Reaction with Tungsten (1959) (81)
- High resolution photoionization study of ion‐pair formation in H2, HD, and D2 (1975) (80)
- Photoionization Mass Spectrometric Study of F2, HF, and DF (1971) (80)
- Photoionization of Methane: Ionization Potential and Proton Affinity of CH4 (1971) (78)
- Rydberg–valence interactions in the Πg states of O2 (1986) (77)
- Mass‐Spectrometric Study of the Photoionization of C2F4 and CF4 (1969) (77)
- Photoionization of CH3; Heat of Formation of CH2 (1968) (70)
- Photoionization of N2 X 1Σ+g, v″=0 and 1 near threshold. Preionization of the Worley–Jenkins Rydberg series (1984) (69)
- Photoionization of Ethylene with Mass Analysis (1969) (69)
- Polymeric Gaseous Species in the Sublimation of Tungsten Trioxide (1957) (67)
- Effects of vibronic interaction and autoionization on the photoelectron spectrum of N2O (1979) (67)
- Mass Spectrometric Study of Barium Oxide Vapor (1955) (65)
- Energy Distribution and Fragmentation Processes Resulting from Electron Impact on Propane and n‐Butane (1961) (63)
- Investigation of the Heat of Vaporization of Carbon (1953) (63)
- Heterogeneous Reactions Studied by Mass Spectrometry. II. Reaction of Li2O(s) with H2O(g) (1960) (62)
- Mass Spectrometric Study of the Sublimation of Lithium Oxid (1959) (61)
- Wavelength dependence of the photoelectron angular distributions of the rare gases (1975) (60)
- On the mechanism for vibrational autoionization in H2 (1977) (57)
- Photoionization of the CF3 Free Radical (1967) (56)
- Dissociation Energies of Some Gaseous Alkali Halide Complex Ions and the Hydrated Ion K(H2O) (1959) (55)
- Observation of Rydberg(C/sup 2/Pi)-valence(B/sup 2/Pi) interactions in NO by multiphoton photoelectron spectroscopy (1982) (54)
- Threshold photoelectron spectra of HF, DF, and F2 (1976) (52)
- Photoionization of atomic oxygen from 920 to 650 Å (1973) (49)
- Comment on the Composition of Selenium Vapor (1968) (49)
- Photoionization of High‐Temperature Vapors. VI. S2, Se2, and Te2 (1969) (49)
- COMPOSITION OF VAPORS IN EQUILIBRIUM WITH SALTS AT HIGH TEMPERATURES (1960) (48)
- Vaporization Processes Involving Sulfur (1964) (47)
- Resonant multiphoton ionization of NO via the A 2Σ+ state: Photoelectron spectra and angular distributions (1984) (47)
- Electron Multipliers in Mass Spectrometry; Effect of Molecular Structure (1956) (46)
- Rydberg–Rydberg transitions of NO using an optical–optical double resonance multiphoton ionization technique (1983) (46)
- Thermodynamics of the Ta–O System : The Dissociation Energies of TaO and TaO2 (1957) (45)
- Resonant multiphoton ionization spectrum and electronic structure of CH radical. New states and assignments above 50 000 cm−1 (1987) (45)
- Photoionization mass spectrometric study of xenon difluoride, xenon tetrafluoride, and xenon hexafluoride (1971) (44)
- Double resonance multiphoton ionization studies of high Rydberg states in nitric oxide (NO) (1983) (42)
- Thermodynamics of the Zr-ZrO2 System: The Dissociations Energies of ZrO and ZrO2 (1957) (42)
- Molecular Species Evaporating from a Carbon Surface (1953) (41)
- Kinetics of Unimolecular Decomposition of Excited Alkylamine Ions (1960) (39)
- Thermodynamics of the V–O System : Dissociation Energies of VO and VO2 (1957) (38)
- Vibrational analysis of the ~A-~X photodissociation spectrum of methyl iodide (1986) (38)
- (2+1) resonance‐enhanced multiphoton ionization–photoelectron spectroscopy of the OH radical (1991) (37)
- Vibrations and Thermodynamic Properties of Hexasulfur (1967) (37)
- Dissociation Energy of Gaseous LaO (1956) (34)
- Thermodynamics of the Ti–Ti2O3 System and the Dissociation Energy of TiO and TiO2 (1957) (34)
- Photodissociation spectrum of CH3I+ prepared by multiphoton ionization (1983) (33)
- Photoionization of the H2 Molecule near Threshold (1968) (32)
- Diatomic ions of noble gas fluorides (1970) (31)
- Spin–orbit and electronic autoionization in HCl (1988) (31)
- Shape resonance and non‐Franck–Condon behavior in the photoelectron spectra of O2 produced by (2+1) multiphoton ionization via 3sσ Rydberg states (1988) (31)
- Competition between autoionization and radiative emission in the decay of excited states of the oxygen atom (1977) (30)
- Photoionization mass spectrometric study of NO. A closer look at the threshold region (1973) (29)
- Observation of the ν1+nν2 combination band in the C̃′ 1A1′ Rydberg state of NH3 (1988) (29)
- Shape resonance influence on the photoelectron angular distributions from O2 C 3Πg, v=0–3 (1988) (28)
- Identification of the nsσ and ndλ Rydberg states of O2 for n=3–5 (1992) (28)
- Reactions of Rydberg states of molecular hydrogen (1994) (27)
- Electron photodetachment from transient negative ions in the multiphoton ionization of CH3I (1985) (27)
- s and d Rydberg complexes of NO probed by double-resonance multiphoton ionisation in the region n* = 5 to n* = 25; multichannel quantum defect analysis. Part II (1990) (27)
- Direct Determination of the Heat of Sublimation of Carbon (1954) (27)
- Multiphoton optical and photoelectron spectroscopy of 4s–3d and 5s–4d Rydberg complexes of O2 (1988) (25)
- Probing excited states of nitric oxide involved in multistate interactions using the optical-optical double resonance-multiphoton ionization technique (1986) (25)
- Photoionization study of the kinetics of unimolecular decomposition of halobenzene ions (1981) (25)
- Experimental Search for Stable, Fractionally Charged Particles (1966) (24)
- New reaction of saturated fluorocarbons: partial reduction by ammonia with mercury photosensitization. (1995) (23)
- Vibrational effects in the spin-orbit autoionization of HBr (1986) (23)
- Photoelectron spectroscopy of the excited states of the CH radical (1986) (23)
- Adiabatic dissociation of photoexcited chlorine molecules (1988) (23)
- Kinetic Energy of Ions Produced by Photoionization of HF and F2 (1971) (22)
- Photoionization study of NO2. I. The ionization potential (1973) (21)
- Photoionization of HOF with mass analysis (1973) (21)
- Photoionization of atomic nitrogen (1974) (21)
- Photoabsorption and photoionization of HD (1983) (21)
- Predissociation‐induced rovibrational autoionization and zero‐energy photoelectrons (1988) (21)
- Photoionization mass spectrometry of F2O (1973) (20)
- Rotational effect in the ionization of a highly excited atom by collision with a polar molecule (1977) (20)
- Two-color laser studies of the multiphoton ionization and dissociation of trans-1,3-butadiene (1984) (20)
- Multiphoton spectroscopy and analysis of the E2? ? X2?, band of CH (1985) (20)
- Search for long-lived doubly charged atomic negative ions (1982) (20)
- Autoionization dynamics in the valence-shell photoionization spectrum of CO (1988) (19)
- Observation and analysis of the 3dπ1Σg+ rydberg state of O2 by (2+1) multiphoton ionization (1989) (19)
- Spectroscopy and photophysics of 1Πg and 3Πg Rydberg, ion‐pair states of Cl2, revealed by multiphoton ionization (1988) (19)
- High power laser photochemistry. Production of neutral atomic and small molecular fragments by UV multiphoton dissociation (1986) (19)
- Two‐photon spectroscopy of the 3d Rydberg states of O2: 1Φg and 3Φg states (1990) (18)
- Rydberg State Reactions of Atomic and Molecular Hydrogen (1995) (17)
- Photoionization study of the reaction O+2 (a4Πu) with O2† (1975) (17)
- Identification of the 3dπ 1Δg and 3Δ2g Rydberg state of O2 by multiphoton ionization and polarization studies (1990) (17)
- Nonstatistical emission from metastable autoionizing states of Oi (1975) (15)
- Identification of the nd Δ and Σ states and the 1,3Φ←←X 3Σ−g transition of O2 by resonant multiphoton ionization (1992) (15)
- Measurement of resonances in atomic oxygen by electron transmission spectroscopy (1974) (15)
- ANOMALOUS INTENSITIES IN ZERO-KINETIC-ENERGY SPECTRA (1999) (15)
- Production of vibrationally state‐selected O+2 via newly discovered 4s–3d and 5s–4d Rydberg states of O2 (1988) (15)
- Energy Dependence of Cross Sections for Collision‐Induced Dissociation and Endothermic Ion—Molecule Reactions (1965) (14)
- Observation of strong Rydberg–valence mixing in the E 3Σ−u state of O2 by 3+1 MPI photoelectron spectroscopy (1988) (14)
- Ion-Molecule Reactions by Photoionization Techniques (1972) (13)
- Mass spectrometric observation of the stable negative molecular ions HI− and H2I− (1982) (13)
- Vibrationally autoionizing rydberg states of NH3 (1988) (12)
- Multiphoton ionization studies of NO: Spontaneous decay channels in the (4pπ)K 2Π(v=2) Rydberg state (1989) (11)
- Predissociation of the 3pπ D 1Πu+ state in H2, HD, and D2 (1979) (11)
- Autoionization of the 4f Rydberg state of the NO molecule (1985) (10)
- Electron transfer in high n Rydberg states (1995) (9)
- Rydberg photochemistry of methyl radicals (1988) (9)
- MASS SPECTROMETRIC STUDIES OF HIGH TEMPERATURE SYSTEMS (1963) (9)
- Isotopic fractionation in low temperature ion–molecule exchange reactions: Enrichment of 22Ne in Ne+n clusters formed by association in an ionized free jet (1990) (9)
- Search for fractionally charged particles in lunar soil. [Upper limit, concentration, cosmic ray flux] (1976) (8)
- Radiative energy loss from hot C60 molecules (1997) (8)
- Rotationally resolved photofragmentation spectroscopy of CH+ formed by resonance-enhanced multiphoton ionization (1991) (7)
- Evidence for a deep Cooper minimum in the 3s-np channel of ND4 (1996) (6)
- Vibronic absorption spectra of the biphenyl and biphenyl‐d10 cations in solid argon (1982) (6)
- Ion-molecule reactions in ethanol by photoionization (1971) (6)
- (2 + 1) resonance-enhanced multiphoton ionization studies of the CH D 2Π (ν=2) state (1992) (5)
- Photoionization and Fragmentation of Polyatomic Molecules (1974) (5)
- Dynamics and spectroscopic manifestations of two-photon bound-bound absorption through a repulsive intermediate state (1987) (5)
- Vibrational effects in coulomb-explosion experiments (1980) (5)
- Anomalous line shapes in delayed optical–optical double resonance studies of N2 (1989) (3)
- HETEROGENEOUS REACTIONS STUDIED BY MASS SPECTROMETRY. I. REACTION OF B$sub 2$O$sub 3$(S) WITH H$sub 2$O(g) (1960) (3)
- High-resolution one-photon ionization spectrum of no using third-harmonic generation (1985) (3)
- Prescription for preparation of molecular ions in selected rotational states (1992) (3)
- Water Dimer and Its Relation to Mass Spectrometric Measurement of C3+ in Carbon Vapor (1955) (3)
- Ionic state preparation of O+2 via the 3dδ 1,3Φg Rydberg states of O2 (1993) (2)
- New Reaction of Saturated Fluorocarbons: Partial Reduction by NH3 with Hg Photosensitization. (1996) (1)
- Differential Decay of States Excited in Zero-Kinetic-Energy Spectroscopy (1999) (1)
- Effects of internal energy on ion-molecule reactions (1974) (1)
- Optical-Optical Double Resonance Multiphoton Ionization Spectroscopy of NO. (1982) (1)
- Shape resonance influence on the photoelectron angular distributions from O/sub 2/ C /sup 3/Pi/sub g/, v = 0--3 (1988) (0)
- HIGH RESOLUTION ONE-PHOTON IONIZATION CROSS SECTION OF NO USING THIRD-HARMONIC GENERATION (1985) (0)
- Identification of the nd A and l : states and the 1 , 3 < 1 l _-X 3 l : g transition of O 2 by resonant multiphoton ionization (2017) (0)
- Photoionization of CO (1978) (0)
- Search for stable, fractionally charged particles /quarks/ in lunar material (1971) (0)
- Oxygen and Other Atmospheric Gases (1989) (0)
- PREPARATION AND PHOTODISSOCIATION OF $CH_{3}I^{+}$ BY MULTIPHOTON PROCESSES (1983) (0)
- Mass spectrometric observation of the stable negative molecular ions HI/sup -/ and H/sub 2/I/sup -/ (1982) (0)
- Predissociation of the 3pπ D ¹Πu⁺ state in H₂, HD, and D₂ (1979) (0)
- Resonances in the total cross section for scattering of electrons by atomic oxygen (1973) (0)
- Photoionization of molecular Rydberg states: H/sub 2/, C /sup 1/Pi/sub u/ and its doubly excited states (1987) (0)
- Photoelectron Spectroscopy of the Excited States of the CH Radical. (1986) (0)
- Photoionization study of the reaction O$sub 2$$sup +$ (a$sup 4$PI/sub u/) with O$sub 2$ (1975) (0)
- RESONANCE ENHANCED MULTIPHOTON IONIZATION OF FREE RADICALS IN A SUPERSONIC EXPANSION. NEW BANDS AND ROTATIONAL ANALYSIS FOR CH AND $CH_{2}$ (1985) (0)
- MEASUREMENT OF AUTOIONIZATION RATES IN THE NON-PENETRATING 4F STATE OF NO (1985) (0)
- Photoionization of the hydrogen halides-Rydberg series converging to the A²Σ⁺ state of the HX⁺ ion (X=Cl, Br, I) (1978) (0)
- Laser Spectroscopy of Excited States in Atmospheric Molecules (1989) (0)
- Dissociation Energies from Thermodynamic Equilibria Studied with a Mass Spectromoeter. (1957) (0)
- MULTIPLE FILAMENT SURFACE IONIZATION SOURCE (1952) (0)
- PHOTOIONIZATION OF $CH_{3}NO_{2}$, $C_{2}H_{3}ONO_{2}$, AND $C_{2}H_{5}NO_{2}$, ELECTRON AFFINITIES OF $NO_{2}$ AND $NO_{3}$, AND THE HEAT OF FORMATION OF $NO_{2}$ (1971) (0)
- Time-resolved studies of molecular atomization by UV-multiphoton laser photolysis (1985) (0)
- TWO LASER FRAGMENTATION STUDY OF BUTADIENE (1983) (0)
- OPTICAL DOUBLE RESONANCE MULTIPHOTON IONISATION SPECTROSCOPY OF NO (1981) (0)
- Photoionization of Xe, HI, and CH₃I-analogies between atomic and molecular Rydberg states (1978) (0)
- IONIZATION AND DISSOCIATION OF POLY-ATOMIC MOLECULES (1964) (0)
- Radiological and Environmental Research Division annual report, October 1979-September 1980: fundamental molecular physics and chemistry (1981) (0)
- PROBING EXCITED STATES OF NO INVOLVED IN MULTISTATE INTERACTIONS USING THE OODR-MPI TECHNIQUE (1985) (0)
- Photoionization of H₂O at high resolution (1978) (0)
- The production and decay of excited states of molecules and ions by photon impact: the formaldehyde molecule (1973) (0)
- THE $4f-\Lambda^{2}\Sigma^{+}$ (1,1) BAND OF NO USING OPTICAL-OPTICAL DOUBLE RESONANCE MULTIPHOTON IONIZATION TECHNIQUE (1982) (0)
- A Study of Some Reactions of H 2 + in Selected Vibrational States (1969) (0)
- VIBRONIC ABSORPTION SPECTRA OF THE BIPHENYL AND BIPHENYL-D10 CATIONS IN SOLID ARGON (1982) (0)
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