Abstract
Isochronous mass spectrometry has been applied to neutron-deficient projectile fragments at the HIRFL-CSR facility in Lanzhou, China. Masses of a series of short-lived nuclides including , , , and have been measured with a precision of 20–40 keV. The new data enable us to test for the first time the isobaric multiplet mass equation (IMME) in -shell nuclei. We observe that the IMME is inconsistent with the generally accepted quadratic form for the , quartet. We perform full space shell model calculations and compare them with the new experimental results.
- Received 24 April 2012
DOI:https://doi.org/10.1103/PhysRevLett.109.102501
© 2012 American Physical Society