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Study of the Average Charge States of 188Pb and 252,254No Ions at the Gas-filled Separator TASCA

Khuyagbaatar, J.; Ackermann, D.; Andersson, Lise-Lotte LU ; Ballof, J.; Bruechle, W.; Duellmann, Ch. E.; Dvorak, J.; Eberhardt, K.; Even, J. and Gorshkov, A., et al. (2012) In Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment 689. p.40-46
Abstract
The average charge states of Pb-188 and No-252,No-254 ions in dilute helium gas were measured at the gas-filled recoil separator TASCA. Hydrogen gas was also used as a filling gas for measurements of the average charge state of No-254. Helium and hydrogen gases at pressures from 0.2 mbar to 2.0 mbar were used. A strong dependence of the average charge state on the pressure of the filling gases was observed for both, helium and hydrogen. The influence of this dependence, classically attributed to the so-called "density effect", on the performance of TASCA was investigated. The average charge states of No-254 ions were also measured in mixtures of helium and hydrogen gases at low gas pressures around 1.0 mbar. From the experimental results... (More)
The average charge states of Pb-188 and No-252,No-254 ions in dilute helium gas were measured at the gas-filled recoil separator TASCA. Hydrogen gas was also used as a filling gas for measurements of the average charge state of No-254. Helium and hydrogen gases at pressures from 0.2 mbar to 2.0 mbar were used. A strong dependence of the average charge state on the pressure of the filling gases was observed for both, helium and hydrogen. The influence of this dependence, classically attributed to the so-called "density effect", on the performance of TASCA was investigated. The average charge states of No-254 ions were also measured in mixtures of helium and hydrogen gases at low gas pressures around 1.0 mbar. From the experimental results simple expressions for the prediction of average charge states of heavy ions moving in rarefied helium gas, hydrogen gas, and in their mixture were derived. (C) 2012 Elsevier B.V. All rights reserved. (Less)
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keywords
Gas-filled separator, Average charge state, Heavy ion, TASCA
in
Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
volume
689
pages
40 - 46
publisher
Elsevier
external identifiers
  • wos:000307797500007
  • scopus:84863504978
ISSN
0167-5087
DOI
10.1016/j.nima.2012.06.007
language
English
LU publication?
yes
id
a67ef147-7c0a-47fe-b927-ae5c0bcf8a45 (old id 3147447)
date added to LUP
2012-11-21 15:12:15
date last changed
2017-07-30 04:22:18
@article{a67ef147-7c0a-47fe-b927-ae5c0bcf8a45,
  abstract     = {The average charge states of Pb-188 and No-252,No-254 ions in dilute helium gas were measured at the gas-filled recoil separator TASCA. Hydrogen gas was also used as a filling gas for measurements of the average charge state of No-254. Helium and hydrogen gases at pressures from 0.2 mbar to 2.0 mbar were used. A strong dependence of the average charge state on the pressure of the filling gases was observed for both, helium and hydrogen. The influence of this dependence, classically attributed to the so-called "density effect", on the performance of TASCA was investigated. The average charge states of No-254 ions were also measured in mixtures of helium and hydrogen gases at low gas pressures around 1.0 mbar. From the experimental results simple expressions for the prediction of average charge states of heavy ions moving in rarefied helium gas, hydrogen gas, and in their mixture were derived. (C) 2012 Elsevier B.V. All rights reserved.},
  author       = {Khuyagbaatar, J. and Ackermann, D. and Andersson, Lise-Lotte and Ballof, J. and Bruechle, W. and Duellmann, Ch. E. and Dvorak, J. and Eberhardt, K. and Even, J. and Gorshkov, A. and Graeger, R. and Hessberger, F. -P. and Hild, D. and Hoischen, Robert and Jaeger, E. and Kindler, B. and Kratz, J. V. and Lahiri, S. and Lommel, B. and Maiti, M. and Merchan, E. and Rudolph, Dirk and Schaedel, M. and Schaffner, H. and Schausten, B. and Schimpf, E. and Semchenkov, A. and Serov, A. and Tuerler, A. and Yakushev, A.},
  issn         = {0167-5087},
  keyword      = {Gas-filled separator,Average charge state,Heavy ion,TASCA},
  language     = {eng},
  pages        = {40--46},
  publisher    = {Elsevier},
  series       = {Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment},
  title        = {Study of the Average Charge States of 188Pb and 252,254No Ions at the Gas-filled Separator TASCA},
  url          = {http://dx.doi.org/10.1016/j.nima.2012.06.007},
  volume       = {689},
  year         = {2012},
}