Related Experiment Video
Updated: Jul 7, 2026

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
Published on: May 3, 2019
Development of a 1+/N+ setup for the production of multicharged radioactive alkali ions in SPIRAL
1GANIL CEA/DSN-CNRS/IN2P3, Bd H Becquerel, BP 55027, Caen Cedex 5, France. eleon@ganil.fr
Abstract:
In the framework of the production of radioactive ion beams by the isotope separator online method, a new system has been developed at GANIL/SPIRAL I to produce multicharged alkali ions. The principle, referred to as the "direct 1+/N+ method," consists of a surface ionization source associated with a multicharged electron-cyclotron-resonance ion source without an intermediate mass separator. This new system has been tested online using a (48)Ca primary beam at 60.3 A MeV. The experimental evidence of the direct 1+/N+ process has been obtained for a potential difference between the two sources of 11 V and with a 1+/N+ charge breeding efficiency of 0.04% for (47)K(5+). This value is significantly lower than the value of 6% obtained for stable K ions with the standard 1+/N+ method. A possible explanation is given in the text.
Related Concept Videos
Nuclear Transmutation
Nuclear Stability
To hold positively charged protons together in the...
Atomic Nuclei: Nuclear Relaxation Processes
Alkali Metals
Table 1: Properties of the alkali metals
