Fingerprints of triaxiality in the charge radii of neutron-rich Ruthenium
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2025
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| author | Maass, Bernhard Ryssens, Wouter Bender, Michael Burdette, Daniel P. Clark, Jason Dockery, Adam Grams, Guilherme Horst, Max Imgram, Phillip König, Kristian Minamisono, Kei Müller, Patrick Müller, Peter Nörtershäuser, Wilfried Pineda, Skyy V. Rausch, Simon Renth, Laura Rickey, Brooke Santiago-Gonzalez, Daniel Savard, Guy Sommer, Felix Valverde, Adrian A. |
| author_facet | Maass, Bernhard Ryssens, Wouter Bender, Michael Burdette, Daniel P. Clark, Jason Dockery, Adam Grams, Guilherme Horst, Max Imgram, Phillip König, Kristian Minamisono, Kei Müller, Patrick Müller, Peter Nörtershäuser, Wilfried Pineda, Skyy V. Rausch, Simon Renth, Laura Rickey, Brooke Santiago-Gonzalez, Daniel Savard, Guy Sommer, Felix Valverde, Adrian A. |
| contents | We present the first measurements with a new collinear laser spectroscopy setup at the Argonne Tandem Linac Accelerator System utilizing its unique capability to deliver neutron-rich refractory metal isotopes produced by the spontaneous fission of 252Cf. We measured isotope shifts from optical spectra for nine radioactive ruthenium isotopes 106-114Ru, reaching deep into the mid-shell region. The extracted charge radii are in excellent agreement with predictions from the Brussels-Skyrme-on-a-Grid models that account for the triaxial deformation of nuclear ground states in this region. We show that triaxial deformation impacts charge radii in models that feature shell effects, in contrast to what could be concluded from a liquid drop analysis. This indicates that this exotic type of deformation should not be neglected in regions where it is known to occur, even if its presence cannot be unambiguously inferred through laser spectroscopy. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2503_07841 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Fingerprints of triaxiality in the charge radii of neutron-rich Ruthenium Maass, Bernhard Ryssens, Wouter Bender, Michael Burdette, Daniel P. Clark, Jason Dockery, Adam Grams, Guilherme Horst, Max Imgram, Phillip König, Kristian Minamisono, Kei Müller, Patrick Müller, Peter Nörtershäuser, Wilfried Pineda, Skyy V. Rausch, Simon Renth, Laura Rickey, Brooke Santiago-Gonzalez, Daniel Savard, Guy Sommer, Felix Valverde, Adrian A. Nuclear Experiment Nuclear Theory We present the first measurements with a new collinear laser spectroscopy setup at the Argonne Tandem Linac Accelerator System utilizing its unique capability to deliver neutron-rich refractory metal isotopes produced by the spontaneous fission of 252Cf. We measured isotope shifts from optical spectra for nine radioactive ruthenium isotopes 106-114Ru, reaching deep into the mid-shell region. The extracted charge radii are in excellent agreement with predictions from the Brussels-Skyrme-on-a-Grid models that account for the triaxial deformation of nuclear ground states in this region. We show that triaxial deformation impacts charge radii in models that feature shell effects, in contrast to what could be concluded from a liquid drop analysis. This indicates that this exotic type of deformation should not be neglected in regions where it is known to occur, even if its presence cannot be unambiguously inferred through laser spectroscopy. |
| title | Fingerprints of triaxiality in the charge radii of neutron-rich Ruthenium |
| topic | Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2503.07841 |