Speaker
Description
A contamination free isotope beam is one of the key requirements for the success of many
experiments located at radioactive ion beam facilities. Resonant ionization laser ion sources
(RILIS), which rely on the unique optical spectrum for each element, are well known for their
ability to provide radioactive ion beams with reduced isobaric background. However, even
though the optical spectrum differs for atom with a nucleus in ground or isomeric state, the
difference in the hyperfine structure spectrum is in most cases too small for being resolved with a RILIS.
Therefore, an ionization method based on a spectroscopy method with higher resolution is
required, such as collinear fast beam laser spectroscopy. By overlapping the continuous wave
(cw) light of a 1.5W blue diode laser with that of the resonant excitation transition along the
polarizer beam line at TRIUMF, 85Rb was ionized with a laser induced ionization enhancement
of 8.3(15)%. Especially for nuclear structure experiment this additional purification could be of
interest.
