Recent Results on Ne and Mg from the MISTRAL Mass Measurement Program at ISOLDE

The MISTRAL experiment (Mass measurements at ISOLDE with a Transmission and Radiofrequency spectrometer on-Line), conceived for very short-lived nuclides, has reached the end of its commissioning phase. Installed in 1997, results have been obtained consistent with all aspects of the projected spectrometer performance: nuclides with half-lives as short as 30 ms have been measured and accuracies of 0.4 ppm have been achieved, despite the presence of a systematic shift and difficulties with isobaric contamination. Masses of several nuclides, including ^25–26Ne and ³²Mg that forms the famous island of inversion around N=20, have been significantly improved. This revised version was published online in July 2006 with corrections to the Cover Date.