Particle emission angle determination in Frisch grid ionization chambers by electron drift-time measurements
✍ Scribed by A. Göök; M. Chernykh; J. Enders; A. Oberstedt; S. Oberstedt
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 441 KB
- Volume
- 621
- Category
- Article
- ISSN
- 0168-9002
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✦ Synopsis
The double kinetic energy measurement of fission fragments with a double-sided Frisch grid ionization chamber allows a careful determination of the emission angle, which is essential in order to apply appropriate energy-loss corrections. We present a drift-time method, which uses the time that free electrons need to drift from the location of their creation, e.g. by a fission fragment in the counting gas, to the grid, before inducing a signal on the anode. Such a measurement leaves energy and angular information fully decoupled. We demonstrate the applicability of the drift-time method for the example of the 234,238 U ðg,f Þ reactions performed at the superconducting Darmstadt electron linear accelerator. The angular resolutions achieved with this method are comparable to those obtained with other methods.