skip to main content

Title: Determination of the solid angle and response function of a hemispherical spectrograph with injection lens for Auger electrons emitted from long lived projectile states

We present SIMION 8.1 Monte Carlo type simulations of the response function and detection solid angle for long lived Auger states (lifetime τ ∼ 10{sup −9} − 10{sup −5} s) recorded by a hemispherical spectrograph with injection lens and position sensitive detector used for high resolution Auger spectroscopy of ion beams. Also included in these simulations for the first time are kinematic effects particular to Auger emission from fast moving projectile ions such as line broadening and solid angle limitations allowing for a more accurate and realistic line shape modeling. Our results are found to be in excellent agreement with measured electron line shapes of both long lived 1s2s2p{sup 4}P and prompt Auger projectile states formed by electron capture in collisions of 25.3 MeV F{sup 7+} with H{sub 2} and 12.0 MeV C{sup 4+} with Ne recorded at 0{sup ∘} to the beam direction. These results are important for the accurate evaluation of the 1s2s2p {sup 4}P/{sup 2}P ratio of K-Auger cross sections whose observed non-statistical production by electron capture into He-like ions, recently a field of interesting interpretations, awaits further resolution.
Authors:
 [1] ; ; ;  [2] ;  [3] ;  [4] ;  [3] ;  [5]
  1. Department of Material Science and Engineering, University of Ioannina, GR 45110 Ioannina (Greece)
  2. Department of Physics, University of Crete, P.O. Box 2208, GR 71003 Heraklion (Greece)
  3. (Greece)
  4. Department of Applied Physics, National Technical University of Athens, GR 15780 Athens (Greece)
  5. Department of Physics, University of Ioannina, GR 45110 Ioannina (Greece)
Publication Date:
OSTI Identifier:
22392444
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 86; Journal Issue: 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CARBON IONS; ELECTRON CAPTURE; ELECTRONS; EMISSION; EVALUATION; LINE BROADENING; MEV RANGE 10-100; MONTE CARLO METHOD; POSITION SENSITIVE DETECTORS; RESOLUTION; RESPONSE FUNCTIONS; S CODES; SIMULATION; SPECTROSCOPY