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HK: Fachverband Physik der Hadronen und Kerne

HK 42: Structure and Dynamics of Nuclei IX

HK 42.3: Talk

Wednesday, March 13, 2024, 16:15–16:30, HBR 19: C 5b

Laser spectroscopy in the ruthenium isotopic chain — •Bernhard Maaß for the ATLANTIS collaboration — TU Darmstadt

Neutron-rich mid-shell nuclei of refractory metals below the magic number Z=50, such as ruthenium, exhibit rich phenomena such as ground-state deformations, shape coexistence, and triaxiality and thus are ideal testing grounds for theories describing these collective properties. Laser spectroscopy of isotopes and isomers in this region can contribute valuable and complementary data with high precision on nuclear shapes, sizes, and electromagnetic moments.

The talk will present an overview of the ATLANTIS setup, positioned at the low-energy branch of the CARIBU fission source at ATLAS, capable of generating sufficiently intense beams of refractory elements. The main emphasis will be the discussion of the results of laser spectroscopic measurements within the ruthenium isotopic chain. Differential mean-squared nuclear charge radii, moments, and shape parameters have been successfully extracted, spanning nine radioactive isotopes from mass 107 to 114.

This work was supported by DFG - Project-Id 279384907-SFB 1245, BMBF 05P19RDFN1 and NSF Grant No. PHY-21-11185, and by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357, with resources of ANL's ATLAS facility, an Office of Science User Facility.

Keywords: laser spectroscopy; ruthenium; charge radius; electromagnetic moments