Objective Physics with radioactive beams (RIB) is at the most advanced frontier of nuclear physics. This field of physics has been opened up at a number of low-energy on-line mass-separator facilities. Beam developments with an efficient and element-selective ionisation technique are needed.Resonance laser ionization of atoms operates in three steps. Laser radiation at frequencies w1 and w2 excites the atom resonantly via atomic intermediate states, and radiation at frequency w3 ionizes it. The ionization of an excited atom can be done non-resonantly through an autoionizing or Rydberg state. Radiation energy equal to a few mJ/cm{2} is sufficient to saturate the resonance transitions. At this value, a significant fraction of the atoms interacting with the laser light will be ionized. Such an energy density can be obtained from dye lasers pumped by copper vapor lasers. They provide a high pulse repetition rate and, consequently, a high chance for interaction of the atoms with the laser light that results in efficient ionization up to 20 %. The practical application of this principle of laser ion-source (LIS) to radioactive isotopes depends on an efficient transfer of the element of interest from the target to the ion-source and on the high suppression of competing ionization processes for the isobaric elements which are also released from the target. The development part in the present project is related to dye laser 1 which will be a narrow band laser. The wavelength control will be given on the direct reading wavemeter mentioned above and not shown in this figure. Tests of the LIS with Ag and Mn will be performed after the necessary preparations at the ISOLDE separator at CERN during the shutdown period of the accelerator. After these tests the ionization schemes for Mg, Mn and Ni will be optimised in the laboratories in Leuven and Troitzk. The final version of the narrow band laser system including the wavelength measurement and control will be completed at the end of the project. The adsorption and desorption device will be implanted in the laser ion-source and tested in Mainz. The full theoretical description of the multistep ionization process for the experimental conditions in the laser ion-source will be performed. Programme(s) IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993- Topic(s) 14 - Nuclear Physics Call for proposal Data not available Funding Scheme Data not available Coordinator JOHANNES GUTENBERG UNIVERSITÄT MAINZ EU contribution No data Address Staudinger Weg 7 55099 Mainz Germany See on map Total cost No data Participants (4) Sort alphabetically Sort by EU Contribution Expand all Collapse all Katholieke Universiteit Leuven Belgium EU contribution No data Address 3001 Heverlee - Leuven See on map Total cost No data National Academy of Sciences of Ukraine Ukraine EU contribution No data Address 252650 Kiev See on map Total cost No data Russian Academy of Sciences Russia EU contribution No data Address 142092 Troitsk, Moscow Region See on map Total cost No data Samarkand State University Uzbekistan EU contribution No data Address Samarkand See on map Total cost No data
