In the whole landscape of atomic nuclei, 229Th is currently the only known nucleus which could allow for the development of a nuclear-based frequency standard, as it possesses an isomeric state of just 7.6 eV energy above the ground state. The 3+ charge state is of special importance in this context, as Th3+ allows for a simple laser-cooling scheme. Here we emphasize the direct extraction of triply-charged 229Th from a buffer-gas stopping cell. This finding will not only simplify any future approach of 229Th ion cooling, but is also used for thorium-beam purification and in this way provides a powerful tool for the direct identification of the 229Th isomer to ground state nuclear transition.
https://www.nuclock.eu/wp-content/uploads/2015/07/nuclock-color-300x77.png 0 0 Simon Stellmer https://www.nuclock.eu/wp-content/uploads/2015/07/nuclock-color-300x77.png Simon Stellmer2016-03-04 12:56:022016-06-02 14:05:59The extraction of 229Th3+ from a buffer-gas stopping cell