New AMS isotopes 135Cs and 90Sr, using ion cooling, available for TA

Ion cooling technology has tremendous untapped potential as a solution for various current limitations of ion beam techniques eg to increase sensitivity and applicability of AMS and the reliability of ultralow energy ion implantation In an ion cooler beams are electrostatically decelerated and cooled in a buffer gas Although the technology is well established at radioactive ion beam facilities dedicated to experimental nuclear physics broader application in ion beam analysis IBA and modification of materials is still in its infancy and no commercial provider exists An ion cooler has recently been developed at UW for AMS applications based on IonLaser Interaction Mass Spectrometry The device is used to decelerate negative ions which greatly increases the interaction time with a laser beam up to few milliseconds required for isobar separation By significantly increasing sensitivity this approach has the potential to more than double the number of ultratrace isotopes available to AMS users boosting numerous new application fields and attracting new user communities The exploratory prototype shows good results and so far was commissioned for 36Cl a wellestablished AMS isotope Methods for new isotopes 135Cs and 90Sr will be developed and will become available for TA within the project duration