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Resonant Transfer Excitation : Interference Effects [Book Chapter]

Conference · · Recombination of Atomic Ions
 [1];  [2];  [3];  [4];  [5];  [5];  [6];  [6];  [6]
  1. University of North Carolina, Chapel Hill, NC (United States)
  2. University of North Carolina, Chapel Hill, NC (United States); Universite Paul Sabatier, Toulouse (France)
  3. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  4. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); University of Missouri, Rolla, MO (United States)
  5. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Kansas State University, Manhattan, KS (United States)
  6. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
+ Show Author Affiliations
Interference effects in RTE (Resonant Transfer Excitation) can be studied for low Z projectiles via Auger electrons emitted from highly ionized fast moving projectile ions following collisions with low Z targets. RTE in ion-atom collisions is closely related to dielectronic recombination’. In the latter case which is of practical interest to the fusion power program an electron with the proper velocity incident on a highly charged ion is resonantly captured and simultaneously interacts with an inner shell electron to excite it, thus forming a doubly excited state which may decay predominantly by x-ray emission for higher Z ions or by Auger electron decay for lower Z ions. The resonant velocity is that of the Auger electron emitted by the ion in the doubly excited state. In RTE the electrons to be captured are in low Z atomic (typically He) or molecular (typically H2) targets and the ions are produced by accelerators in highly charged states with the appropriate resonant velocity. The resonance is much broadened by the velocity distribution of the target electrons. Thus the resonance width as a function of projectile energy is determined by folding the Compton profile of the target electrons with the dielectronic recombination cross sections. This results in a formula valid when the impulse approximation applies:
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB)
DOE Contract Number:
AC05-84OR21400; FG05-87ER40361
OSTI ID:
10122283
Report Number(s):
CONF-9110313--5; ON: DE92007240
Resource Type:
Conference paper
Conference Information:
Journal Name: Recombination of Atomic Ions Journal Volume: 296
Country of Publication:
United States
Language:
English

References (18)

A simple classical model for the impact parameter dependence of electron capture journal August 1983
A high resolution projectile electron spectrometer journal May 1985
High resolution studies of electron capture and excitation by 0° projectile electron spectroscopy journal April 1989
PRODUCTION OF DOUBLY CORE EXCITED CONFIGURATIONS IN C4+PROJECTILES THROUGH RESONANT TRANSFER EXCITATION journal December 1987
Simultaneous charge transfer and excitation journal March 1984
Transfer excitation in He++He collisions studied by 0 degrees electron spectroscopy journal December 1985
Resonant transfer and excitation in ion-atom collisions journal March 1983
Evidence for uncorrelated electron capture andK-shell excitation inS13++He collisions journal June 1985
Formation of doubly excited two-electron ions duringF8++He,F8++Ne, andF8++Ar collisions journal February 1985
Resonant transfer and excitation in Li-like F colliding withH2 journal November 1988
State-selective observation of resonant transfer excitation in collisions ofF6+with He andH2targets journal December 1989
Effects of alignment and interference in resonant transfer and excitation forF6+andO5+collisions withH2in 0° Auger measurements journal July 1990
Observation of Resonant Transfer and Excitation to SpecificLS-Coupled States inO5++ He Collisions by High-Resolution, 0° Auger-Electron Spectroscopy journal December 1986
Separated resonances in simultaneous capture and excitation ofS15+inH2observed byK-x-ray–K-x-ray coincidences journal April 1987
Analysis of Electron Correlation in Simultaneous Electron Transfer and Excitation in Atomic Collisions journal August 1988
Electron-electron interactions in transfer and excitation inF8+→H2collisions journal April 1989
Projectile 1s→2p excitation due to electron-electron interaction in collisions of O 5 + and F 6 + ions with H 2 and He targets journal May 1989
Angular distribution of Auger electrons and photons in resonant transfer and excitation in collisions of ions with light targets journal March 1990

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Related Subjects

664300
664400
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
AUGER EFFECT
COLLISION PHENOMENA
CROSS SECTIONS
ELECTRON SPECTRA
ELECTRON TRANSFER
EXPERIMENTALLY DERIVED INFORMATION ON ATOMIC AND MOLECULAR PROPERTIES
HELIUM
ION-ATOM COLLISIONS
MULTICHARGED IONS
OXYGEN IONS