Charge radii measurements of 26−34Al transitioning into the N = 20 island of inversion

by Jordan Ray Reilly (University of Manchester (GB))

Tuesday 6 Jun 2023, 16:00 → 18:00 Europe/Zurich

CERN

The neutron-rich isotopes of Al provide an exemplary opportunity to study the evolution of nuclear structure in radioactive isotopes lying close to the N = 20 island of inversion. At Z = 13, the Al isotopes are positioned between spherical Si [1] and deformed Mg [2], with 32Mg being located at the centre of the N = 20 island of inversion. Therefore, Al presents an ideal candidate to study a possible transition into the island of inversion. Current charge radii measurements of radioactive isotopes are limited up to N = 20 for Mg [2] and Na [3], and N = 19 for Al [4]. The CRIS collaboration recently measured 26-34Al using laser spectroscopy, crossing the N = 20 shell closure, building on previous results measured at ISOLDE, CERN [4].
In this talk, a brief overview of the CRIS technique will be presented along with recent measurements of the changes in the mean-squared charge radii of 33,34Al, crossing N = 20 for the first time in this region. These results will be discussed in relation to the N = 20 island of inversion and compared with neighbouring isotopic chains.