Nuclear charge radii and electromagnetic moments of scandium isotopes and isomers in the f7/2 shell

Gangrsky, Yu. P.; Marinova, K. P.; Zemlyanoi, S. G.; Avgoulea, M.; Billowes, J.; Campbell, P.; Cheal, B.; Tordoff, B.; Bissell, M. L.; Forest, D. H.; Gardner, M.; Tungate, G.; Huikari, J.; Penttilä, H.; Äystö, J.

doi:10.1007/s10751-006-9488-x

Cited by 9 publications

(4 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The number of observed or resolved lines in some cases was not sufficient to extract all of the A and B factors of the lower and upper level independently. For this reason, the lower state hyperfine parameters A l , B l were scaled for all isotopes to the ratios of the A and B parameters observed in the 45 Sc ground state (A l /A u = +2.4686 (13) and B l /B u = +0.552 (29)). The hyperfine anomaly is negligible relative to our experimental uncertainties (see e.g.…”

Section: Hyperfine Structure and Electromagnetic Momentsmentioning

confidence: 99%

“…Other spectra (not shown) with overlapping scan regions were also taken and analysed simultaneously. Spectra for the other isotopes are contained in [16].…”

Section: Hyperfine Structure and Electromagnetic Momentsmentioning

confidence: 99%

“…This paper reports the first collinear laser spectroscopy results for the radioactive scandium isotopes, [42][43][44]46 Sc, including the 44m Sc (I = 6 + ) and 45m Sc (I = 3/2 + ) isomers. Our earlier published data [16] were preliminary and did not include the atomic calculations required to determine the ms charge radii from the isotope shifts. The experimental work was undertaken at the University of Jyväskylä, Finland, where the pioneering development of the IGISOL (ion-guide isotope separator on-line) facility [17] has enabled the production of radioactive beams of scandium isotopes with sufficient yields for laser spectroscopy experiments.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nuclear charge radii and electromagnetic moments of radioactive scandium isotopes and isomers

Avgoulea¹,

Gangrsky²,

Marinova³

et al. 2011

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

Abstract. 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.

show abstract

Section: Hyperfine Structure and Electromagnetic Momentsmentioning

confidence: 99%

“…Other spectra (not shown) with overlapping scan regions were also taken and analysed simultaneously. Spectra for the other isotopes are contained in [16].…”

Section: Hyperfine Structure and Electromagnetic Momentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nuclear charge radii and electromagnetic moments of radioactive scandium isotopes and isomers

Avgoulea¹,

Gangrsky²,

Marinova³

et al. 2011

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

show abstract

“…For the Sc ii 361.3 nm line we used the A and B factors measured by Gangrsky et al (2006). In both cases we used the code linestruc of Wahlgren (2005) to compute HFS components.…”

Section: Other Elementsmentioning

confidence: 99%

First stars XI. Chemical composition of the extremely metal-poor dwarfs in the binary CS 22876-032

Hernández

Bonifacio

Ludwig

et al. 2008

A&A

View full text Add to dashboard Cite

Context. Unevolved metal-poor stars constitute a fossil record of the early Galaxy, and can provide invaluable information on the properties of the first generations of stars. Binary systems also provide direct information on the stellar masses of their member stars. Aims. The purpose of this investigation is a detailed abundance study of the double-lined spectroscopic binary CS 22876−032, which comprises the two most metal-poor dwarfs known. Methods. We used high-resolution, high-S/N ratio spectra from the UVES spectrograph at the ESO VLT telescope. Long-term radialvelocity measurements and broad-band photometry allowed us to determine improved orbital elements and stellar parameters for both components. We used OSMARCS 1D models and the turbospectrum spectral synthesis code to determine the abundances of Li, O, Na, Mg, Al, Si, Ca, Sc, Ti, Cr, Mn, Fe, Co and Ni. We also used the CO 5 BOLD model atmosphere code to compute the 3D abundance corrections, notably for Li and O. Results. We find a metallicity of [Fe/H] ∼ −3.6 for both stars, using 1D models with 3D corrections of ∼−0.1 dex from averaged 3D models. We determine the oxygen abundance from the near-UV OH bands; the 3D corrections are large, −1 and −1. Conclusions. The Li abundance in the primary star supports the extension of the Spite Plateau value at the lowest metallicities, without any decrease. The low abundance in the secondary star could be explained by endogenic Li depletion, due to its cooler temperature. If this is not the case, another, yet unknown mechanism may be causing increased scatter in A(Li) at the lowest metallicities.

show abstract

Nuclear Data Sheets for A = 45

Burrows

2008

Nuclear Data Sheets

View full text Add to dashboard Cite

Nuclear charge radii and electromagnetic moments of scandium isotopes and isomers in the f7/2 shell

Cited by 9 publications

References 18 publications

Nuclear charge radii and electromagnetic moments of radioactive scandium isotopes and isomers

Nuclear charge radii and electromagnetic moments of radioactive scandium isotopes and isomers

First stars XI. Chemical composition of the extremely metal-poor dwarfs in the binary CS 22876-032

Nuclear Data Sheets for A = 45

Contact Info

Product

Resources

About