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Measurement and uncertainties of energy loss in silicon over a wide Z(1) range using time of flight detector telescopes

Whitlow, Harry J LU ; Timmers, H; Elliman, RG; Weijers, TDM; Zhang, YW and O'Connor, DJ (2002) In Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms 195(1-2). p.133-146
Abstract
The energy loss of projectiles with Z(1) in the range 3-26 has been experimentally measured in the 0.1-0.7 MeV per nucleon energy range in the same Si stopping foil of 105.5 mug cm(-2) thickness using a time of flight-energy (ToF-E) elastic recoil detection analysis (ERDA) setup. A detailed study of the experimental uncertainties for ToF-E and ToF-ToF-E configuration has been made. For ERDA configurations where the energy calibration is taken against the edge positions small uncertainties in the angle at which recoils are detected can introduce significant, absolute uncertainty. The relative uncertainty contribution is dominated by the energy calibration of the Si E detector for the ToF-E configuration and the position of the second ToF... (More)
The energy loss of projectiles with Z(1) in the range 3-26 has been experimentally measured in the 0.1-0.7 MeV per nucleon energy range in the same Si stopping foil of 105.5 mug cm(-2) thickness using a time of flight-energy (ToF-E) elastic recoil detection analysis (ERDA) setup. A detailed study of the experimental uncertainties for ToF-E and ToF-ToF-E configuration has been made. For ERDA configurations where the energy calibration is taken against the edge positions small uncertainties in the angle at which recoils are detected can introduce significant, absolute uncertainty. The relative uncertainty contribution is dominated by the energy calibration of the Si E detector for the ToF-E configuration and the position of the second ToF detector in ToF-ToF-E measurements. The much smaller calibration uncertainty for ToF-ToF-E configuration implies this technique is superior to ToF-E measurements with Si E detectors. At low energies the effect of charge changing in the time detector foils can become important. It was found that empirical stopping numbers which include the effect of effective-charge were more closely clustered about a trend line when plotted against the Bohr parameter than the corresponding Bethe parameter. Study of the deviations from the trend line showed evidence of a shell dependant effect that exceeded the anticipated maximum relative uncertainties. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
flight, time of, elastic recoil detection analysis, stopping, energy loss, Si
in
Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
volume
195
issue
1-2
pages
133 - 146
publisher
Elsevier
external identifiers
  • wos:000178478400008
  • scopus:0036783664
ISSN
0168-583X
DOI
10.1016/S0168-583X(02)00946-1
language
English
LU publication?
yes
id
5e9f1435-ce46-4208-98bf-c4862a004e08 (old id 325961)
date added to LUP
2007-11-19 13:53:32
date last changed
2017-01-01 06:40:09
@article{5e9f1435-ce46-4208-98bf-c4862a004e08,
  abstract     = {The energy loss of projectiles with Z(1) in the range 3-26 has been experimentally measured in the 0.1-0.7 MeV per nucleon energy range in the same Si stopping foil of 105.5 mug cm(-2) thickness using a time of flight-energy (ToF-E) elastic recoil detection analysis (ERDA) setup. A detailed study of the experimental uncertainties for ToF-E and ToF-ToF-E configuration has been made. For ERDA configurations where the energy calibration is taken against the edge positions small uncertainties in the angle at which recoils are detected can introduce significant, absolute uncertainty. The relative uncertainty contribution is dominated by the energy calibration of the Si E detector for the ToF-E configuration and the position of the second ToF detector in ToF-ToF-E measurements. The much smaller calibration uncertainty for ToF-ToF-E configuration implies this technique is superior to ToF-E measurements with Si E detectors. At low energies the effect of charge changing in the time detector foils can become important. It was found that empirical stopping numbers which include the effect of effective-charge were more closely clustered about a trend line when plotted against the Bohr parameter than the corresponding Bethe parameter. Study of the deviations from the trend line showed evidence of a shell dependant effect that exceeded the anticipated maximum relative uncertainties.},
  author       = {Whitlow, Harry J and Timmers, H and Elliman, RG and Weijers, TDM and Zhang, YW and O'Connor, DJ},
  issn         = {0168-583X},
  keyword      = {flight,time of,elastic recoil detection analysis,stopping,energy loss,Si},
  language     = {eng},
  number       = {1-2},
  pages        = {133--146},
  publisher    = {Elsevier},
  series       = {Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms},
  title        = {Measurement and uncertainties of energy loss in silicon over a wide Z(1) range using time of flight detector telescopes},
  url          = {http://dx.doi.org/10.1016/S0168-583X(02)00946-1},
  volume       = {195},
  year         = {2002},
}