Nuclear charge radii and electromagnetic moments of radioactive scandium isotopes and isomers
| Autor: | Jussi Huikari, Mark Bissell, K. P. Marinova, Yu. P. Gangrsky, D. H. Forest, J. Billowes, M Avgoulea, A. Nieminen, Juha Äystö, Stephan Fritzsche, B. Tordoff, Edward Simpson, Heikki Penttilä, G. Tungate, D. Iablonskyi, Carlo Barbieri, Bradley Cheal, S. G. Zemlyanoi, Paul Campbell, Paul Stevenson, M. D Gardner |
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| Přispěvatelé: | School of Physics and Astronomy [Manchester], University of Manchester [Manchester], Flerov Laboratory of Nuclear Reactions [Dubna] (FLNR), Joint Institute for Nuclear Research (JINR), Helmholtz zentrum für Schwerionenforschung GmbH (GSI), Department of Physics, University of Oulu, University of Surrey (UNIS), School of Physics and Astronomy, University of Birmingham [Birmingham], Department of Physics [Jyväskylä Univ] (JYU), University of Jyväskylä (JYU) |
| Rok vydání: | 2011 |
| Předmět: |
Physics
Nuclear and High Energy Physics collinear laser spectroscopy 010308 nuclear & particles physics chemistry.chemical_element 01 natural sciences 7. Clean energy Effective nuclear charge Ion 21.10.Ky chemistry nuclear moments PACS numbers: 21.10.Ft 0103 physical sciences Quadrupole mean-square charge radius Neutron Physics::Atomic Physics Scandium 42.62.Fi Atomic physics 010306 general physics Spectroscopy 32.10.Fn Magnetic dipole Hyperfine structure |
| Zdroj: | Journal of Physics G: Nuclear and Particle Physics Journal of Physics G: Nuclear and Particle Physics, IOP Publishing, 2011, 38 (2), pp.25104. ⟨10.1088/0954-3899/38/2/025104⟩ |
| ISSN: | 1361-6471 0954-3899 |
| DOI: | 10.1088/0954-3899/38/2/025104 |
| Popis: | International audience; Collinear laser spectroscopy experiments with the Sc + transition 3d4s 3 D 2 → 3d4p 3 F 3 at λ = 363.1 nm were performed on the 42−46 Sc isotopic chain using an ion guide isotope separator with a cooler-buncher. Nuclear magnetic dipole and electric quadrupole moments as well as isotope shifts were determined from the hyperfine structure for five ground states and two isomers. Extensive multi-configurational Dirac-Fock calculations were performed in order to evaluate the specific mass-shift, M SMS, and field-shift, F, parameters which allowed evaluation of the charge radii trend of the Sc isotopic sequence. The charge radii obtained show systematics more like the Ti radii, which increase towards the neutron shell closure N = 20, than the symmetric parabolic curve for Ca. The changes in mean square charge radii of the isomeric states relative to the ground states for 44 Sc and 45 Sc were also extracted. The charge radii difference between the ground and isomeric states of 45 Sc is in agreement with the deformation effect estimated from the B(E2) measurements but is smaller than the deformation extracted from the spectroscopic quadrupole moments. |
| Databáze: | OpenAIRE |
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