Purification of Radioactive Ion Beams by Photodetachment in a RF Quadrupole Ion Beam Cooler
A highly efficient method for suppressing isobar contaminants in negative radioactive ion beams by photodetachment is demonstrated. A laser beam having the appropriate photon energy is used to selectively neutralize the contaminants. The efficiency of photodetachment can be substantially improved when the laser-ion interaction takes place inside a radio frequency quadrupole ion cooler. In off-line experiments with ion beams of stable isotopes, more than 99.9% suppression of Co{sup -}, S{sup -}, and O{sup -} ions has been demonstrated while under the identical conditions only 22% reduction in Ni{sup -} and no reduction in Cl{sup -} and F{sup -} ions were observed. This technique is being developed for on-line purification of a number of interesting radioactive beams, such as {sup 56}Ni, {sup 17,18}F, and {sup 33,36}Cl.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 950799
- Resource Relation:
- Conference: 1st International Conference on Negative Ions, Beams and Sources - Aix-en-Provence, , France - 9/10/2008 12:00:00 AM-9/12/2008 12:00:00 AM
- Country of Publication:
- United States
- Language:
- English
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Efficient Isobar Suppression by Photodetachment in a RF Quadrupole Ion Cooler
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