Investigation of gas stripping at 4.1MeV for high mass negative ions
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Date
2013-01-01
Authors
Hotchkis, MAC
Child, DP
Fink, D
Levchenko, VA
Wallner, A
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier Science BV
Abstract
We have used a tandem accelerator to measure charge state distributions at 4.1 MeV for negative ions ranging from carbon to uranium oxide passing through the gases helium, argon and xenon. The gas density was varied over a wide range to observe the onset of equilibrium stripping conditions. Using a 12 degrees electrostatic deflector after the accelerator, charge states from 1+ to 8+ have been measured. For carbon, the charge state is seen to strip progressively from a low charge of around 1+ towards equilibrium with increasing gas thickness. However, for all the other ions, there is a high probability of multiple electron loss in single collisions with the gas, leading to mean charge states greater than 2 even at very low gas stripper pressure. This effect is observed to be gas-independent. © 2013, Elsevier Ltd.
Description
Keywords
Mass, Administrative procedures, Stripping, Plutonium, Iodine, Collisions
Citation
Hotchkis, M. A. C., Child, d., Fink, D., Levchenko, V., & Wallner, A. (2013). Investigation of gas stripping at 4.1MeV for high mass negative ions. Paper presented at the Twelfth International Conference on Accelerator Mass Spectrometry, 20-25 March 2011, Wellington, New Zealand. In Zondervan, A., Prior, C., Bruhn, F., & Sparks, R. (Eds), Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 294, 287-391. doi:10.1016/j.nimb.2012.01.019