SelectedWorks - Robert D. DuBois

Selected Works of Robert D. DuBois

Emeritus

Works
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About Robert D. DuBois

Present	Emeritus, Missouri University of Science and Technology ‐ Physics
Institution Organization Position Type Position Title Time Period to Options Current Position Affiliate my profile with this Institution

Physics

Ionization Cross Sections of Hydrogen Molecule by Electron and Positron ...

International Journal of Molecular Sciences (2024)

Károly Tőkési and Robert D. DuBois

We Present Ionization Cross Sections of Hydrogen Molecules by Electron and Positron Impact for Impact Energies between 20 and 1000 ...

Energy And Angular Distributions In 250 EV Electron And Positron ...

Journal of Physics B: Atomic, Molecular and Optical Physics (2024)

K. Tőkési and Robert D. DuBois

We present energy and angular differential cross sections for single ionization in collisions between electrons and positrons with argon atoms ...

Guiding of KeV Ions between Two Insulating Parallel Plates

Scientific Reports (2022)

Robert D. DuBois, K. Tőkési and E. Giglio

Experimental data are presented for low-energy singly charged ion transport between two insulating parallel plates. Using a beam intensity of ...

Triply Differential Positron and Electron Impact Ionization of Argon: Systematic ...

Robert D. DuBois and O. G. de Lucio

Triply differential data are presented for the 200 eV positron and electron impact ionization of argon. Six electron emission energies ...

Triply Differential Single Ionization of Argon: Charge Effects for Positron ...

Physical Review Letters (2010)

Sebastian Otranto, Ronald E. Olson, O. G. de Lucio and Robert D. DuBois

Triply differential single ionization of Ar by 200 eV positron and electron impact is measured and calculated. For an unequivocal ...

Information About TS-1 and TS-2 Double Ionization Mechanisms for Positron ...

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms (2009)

Jared M. Gavin, O. G. de Lucio and Robert D. DuBois

Ejected electron angular distributions are measured for single and double ionization of argon by 500 eV positron and electron impact. ...

Differential Ionisation Measurements for Positron Impact

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms (2008)

Jared M. Gavin, Robert D. DuBois and O. G. de Lucio

An overview of methods being used at the University of Missouri-Rolla to measure differential ionisation for positron impact is presented. ...

Ionization in Fast Atom-Atom Collisions: The Influence and Scaling Behavior ...

Physical Review A (2007)

J. M. Sanders, R. D. Manson, S. Datz, E. F. Deveney, et al.

We report cross sections for ionization of He coincident with electron loss from He, Li, C, O, and Ne projectiles. ...

Beam Lifetimes for Low-Charge-State Heavy Ions in the GSI Storage ...

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms (2007)

Mark Allan Thomason, G. Weber, Th. Stöhlker, K. Beckert, et al.

Lifetimes for 10-50 MeV/u U28+ ions were measured for base vacuum conditions in the ESR storage ring at GSI-Darmstadt. The ...

Differential Ionization of Ar by Positron and Electron Impact

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms (2007)

O. G. de Lucio, Jared M. Gavin and Robert D. DuBois

Coincidences between recoil ions-ejected electrons, and recoil ions-scattered projectiles were used to study the kinematics of electron and positron impact ...

Triply Differential Ionization of Ar by 500 EV Positron and ...

Journal of Physics: Conference Series (2007)

O. G. de Lucio, Jared M. Gavin and Robert D. DuBois

Coincidences between recoil ions-ejected electrons and recoil ions-scattered projectiles have been used to study the kinematics of electron and positron ...

Doubly Differential Single and Multiple Ionization of Krypton by Electron ...

Physical Review A (2007)

O. G. de Lucio, Jared M. Gavin and Robert D. DuBois

Differential measurements for single and multiple ionization of Kr by 240 and 500 eV electron impact are presented. Using a ...

Ionization Studies using Positron and Electron Beams

Radiation Physics and Chemistry (2007)

Robert D. DuBois

Experimental methods and data for positron and electron impact ionization are discussed. Examples of total, doubly, and triply differential studies ...

Differential Electron Emission for Single and Multiple Ionization of Argon ...

Physical Review Letters (2006)

Jared M. Gavin, Robert D. DuBois and O. G. de Lucio

Triply differential electron emission cross sections are measured for single ionization of argon by 500 eV positrons. Data are presented ...

Differential Ionization Studies for Positron Impact

Brazilian Journal of Physics (2006)

O. G. de Lucio, Jared M. Gavin and Robert D. DuBois

Recent studies of differential ionization by positron impact being performed at the University of Missouri- Rolla are described. Recoil ion-scattered ...

Doubly and Triply Differential Ionization Studies using Positrons and Electrons

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms (2005)

Robert D. DuBois, Antonio C. Santos, Mark Allan Thomason and Jared M. Gavin

Methods and results from experimental studies of single and multiple ionization of atoms induced by positron and electron impact are ...

Electron Loss in MeV/U Collisions Between Many-Electron Projectiles and ...

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms (2005)

Robert D. DuBois

Ionization cross-sections have been measured for MeV/u, low-charge-state, heavy ions colliding with many-electron targets. Single and multiple electron removal from ...

Channel Electron Multiplier and Channelplate Efficiencies for Detecting Positive Ions

Review of Scientific Instruments (2005)

M. Krems, J. Zirbel, Mark Allan Thomason and Robert D. DuBois

Absolute detection efficiencies for singly and multiply charged positive ions have been measured for a channelplate and for two different ...

Electron Stripping Cross-Sections for Fast, Low Charge State Uranium Ions

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment (2005)

Ronald E. Olson, R. L. Watson, V. Horvat, K. E. Zaharakis, et al.

Cross-sections for projectile electron loss for U10+ and U28+ colliding with H2, N2, and Ar were calculated using the n-body ...

Scaling Laws for Electron Loss from Ion Beams

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment (2005)

Antonio C. Santos, Ronald E. Olson and Robert D. DuBois

Empirical scaling rules for projectile stripping induced by collisions with argon were extracted by analyzing a large database of experimental ...

Doubly Differential Cross Sections for Single and Multiple Ionization of ...

Physical Review A (2005)

Antonio C. Santos, Ahmad Hasan and Robert D. DuBois

We present doubly differential cross sections for single and multiple ionization of the outer shell of neon by 750 eV ...

Emission Spectroscopy of Highly Charged Ions in Plasma of an ...

AIP Conference Proceedings (2004)

I. Draganic, J. R. Crespo Lopez-Urrutia, R. Soria Orts, V. Shevelko, et al.

The results of experimental study of magnetic dipole (M1) transitions in highly charged ions of argon (Ar9+, Ar10+, Ar13+ and ...

Electron Loss from 1.4-MeV / u U4,6,10+ Ions ...

Physical Review A (2004)

Robert D. DuBois, Antonio C. Santos, Th. Stohlker, F. Bosch, et al.

Absolute, total, single- and multiple-electron-loss cross sections are measured for 1.4-MeV / u U4,6,10+ ions colliding with neon and argon ...

Scaling Laws for Single and Multiple Electron Loss from Projectiles ...

Physical Review A (2004)

Antonio C. Santos and Robert D. DuBois

Using measured cross sections, empirical scaling laws are extracted for projectile stripping induced by collisions with a many-electron target. by ...

Physics with Highly-Charged Ions in an EBIT

Hyperfine Interactions (2003)

Jose R. Crespo Lopez-Urrutia, Bhas Bapat, I. N. Draganic, Bernold Feuerstein, et al.

After the commissioning of the Freiburg electron beam ion trap, experiments on dielectronic recombination of the low-lying resonances in He-like ...