First results using a new technology for measuring masses of very short-lived nuclides with very high accuracy: The MISTRAL program at ISOLDE

MISTRAL is an experimental program to measure masses of very short-lived nuclides (T1/2 down to a few ms), with a very high accuracy (a few 10−7). There were three data taking periods with radioactive beams and 22 masses of isotopes of Ne, Na, Mg, Al, K, Ca, and Ti were measured. The systematic errors are now under control at the level of 8×10−7, allowing to come close to the expected accuracy. Even for the very weakly produced 30Na (1 ion at the detector per proton burst), the final accuracy is 7×10−7.