Results 251 to 260 of about 31,277 (294)

Laser-ablation charge exchange for collinear resonance ionization spectroscopy

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1999
A charge-exchange cell based on pulsed-laser ablation has been developed and applied to collinear resonance ionization spectroscopy. A fast lithium ion beam has been neutralized in the charge-exchange cell and resonance ionization spectra of the 2s2S1/2−2p2P1/2,3/20 transitions of lithium have been successfully observed.
Masashi Kubota, Mitsuto Isobe, Tatsuya Minowa, Wei-Guo Jin, Hidetsugu Katsuragawa, Haruko Uematsu   +5 more
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Emittance growth due to hydrogen ionization by charge exchange in a solenoid

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1988
Abstract The emittance of a H− ion beam produced by ionizing an atomic hydrogen beam in an alkali vapour within a solenoidal magnetic field has been measured. The observed transverse emittance growth due to the magnetic field agrees well with the prediction by Ohlsen et al. [1].
W.M. Law, C.D.P. Levy, P.W. Schmor, J. Uegaki   +3 more
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Ionization of a Polarized Atomic Beam by Charge Exchange Reactions

1976
In atomic beam sources the polarized atomic beam is ionized by electron impact. A higher ionization efficiency is expected if charge exchange reactions with their typical high cross sections are used1). Our first experiment was a test for an employment of charge exchange reactions for the production of polarized protons and deuterons from the atomic ...
W. Hammon, A. Weinig
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Ionization equilibrium in a rarefied gas. The effect of charge-exchange reactions

Astrophysics, 1984
A study is made of the ionization equilibrium of the elements H, He, C, N, O, Ne, Mg, Si, S in a low-density gas. The ionic composition of such a gas at less than 1 million K depends strongly on the charge-exchange reactions. Tables of the ionic composition in the temperature range 100,000-1,000,000 K are given. 14 references.
A. A. Suchkov, Yu. A. Shchekinov
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Substituent effects in charge exchange chemical ionization mass spectrometry

Analytical Chemistry, 1986
Substituent effects in charge exchange chemical ionization mass spectrometry are examined. A linear Hammett relationship was observed for a series of monosubstituted benzenes and naphthalenes. Substituted aromatic compounds not distinguished by electron impact mass spectrometry can be predictively resolved by charge exchange chemical ionization mass ...
William J. Simonsick, Ronald A. Hites
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‘‘Heisenberg core’’ in classical-trajectory Monte Carlo calculations of ionization and charge exchange

Physical Review Letters, 1986
We present results of classical-trajectory Monte Carlo calculations for bare ions on helium atoms. We impose the Heisenberg uncertainty principle on the classical system and obtain two important benefits. Firstly, the classical He atom is stabilized and thus full four-body classical-trajectory Monte Carlo calculations are possible.
, Zajfman, , Maor
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The Theory of Charge Exchange and Ionization by Heavy Particles

1983
In the 1979 ASI on atomic processes of interest in fusion research, I surveyed the basic principles of the theory of charge exchange,1 concentrating on theoretical models in which the wave function of the system was expanded in some suitable set of functions.† At low to intermediate relative velocities of the colliding ions (v ≲ 1 a.u.) the expansion ...
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Intermediate ionization continua for double charge exchange at high impact energies

Physical Review A, 1993
We investigate the problem of two-electron capture from heliumlike atomic systems by bare nuclei ${\mathit{Z}}_{\mathit{P}}$+(${\mathit{Z}}_{\mathit{T}}$;${\mathit{e}}_{1}$,${\mathit{e}}_{2}$${)}_{\mathit{i}}$\ensuremath{\rightarrow}(${\mathit{Z}}_{\mathit{P}}$;${\mathit{e}}_{1}$,${\mathit{e}}_{2}$${)}_{\mathit{f}}$+${\mathit{Z}}_{\mathit{T}}$ at high ...
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Charge Exchange and Ionization in Ion-Atom Collisions

1982
The general theory of charge exchange in atom-atom and ion-atom collisions is examined at the various levels of approximation that are made possible by comparing collision energies and typical electron binding energies.
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Ionization, charge exchange, and excitation in F + Ar and F + Kr collisions

Physical Review A, 1976
We have measured projectile and target x-ray cross sections for F + Ar and F + Kr collisions using fluorine beams of charge states 7+, 8+, and 9+ with energies from 20 to 76 MeV. Pronounced enhancements for the Ar K and Kr L vacancy cross sections using F9+ ions compared to those for the 7+ projectile can be explained by charge exchange as described by
Forrest Hopkins, Rudiger Brenn, Anthony R. Whittemore, Nelson Cue, Vince Dutkiewicz, R. P. Chaturvedi   +5 more
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