Recent Mistral Mass Measurements of Magnesium 29-33 and Lithium 11
Abstract
High precision mass measurements have been performed on the very neutron-rich 29-33Mg and 11Li nuclides using the MISTRAL radio-frequency mass spectrometer, especially suited to very short-lived nuclides. This method, combined with the powerful tool of resonant laser ionization at CERN-ISOLDE has allowed to significantly reduce the uncertainty in mass of these nuclides. An accuracy of 5 to 7×10-7 could be achieved for the weakly produced 33Mg (T1/2=90.5 ms) and 11Li (T1/2=8.75 ms). All these nuclei were selected for their special interest: the isotopic chain 29-33Mg crosses the N = 20 line which is a shell closure for heavier elements, but not for light ones as sodium and magnesium, while the borromean nuclide 11Li is known as a halo nucleus in which two neutrons stray very far from the 9Li core.
- Publication:
-
Exotic Nuclei (EXON2004)
- Pub Date:
- September 2005
- DOI:
- 10.1142/9789812701749_0003
- Bibcode:
- 2005exnu.conf...17T