Changes of the Nuclear Charge Distribution of Nd, Sm, Gd and Dy from Optical Isotope Shifts

Wakasugi, M.; Horiguchi, T.; Jin, Wei–Guo; Sakata, H.; Yoshizawa, Yasukazu

doi:10.1143/jpsj.59.2700

Cited by 58 publications

(20 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since the isotopes of IS2Gd and 'S4Gd have 88 and 90 neutrons, they have distorted nuclear Downloaded by [Korea University] at 10:19 05 January 2015 charge distributions [21,22]. Suppose the nuclear charge distribution is the major cause of the chemical isotope effects, the unusual isotope effects should take place on the gadolinium even atomic mass isotopes as in the case with samarium.…”

Section: Nuclear Size and Shape Effect In Chemical Isotope Effect Of mentioning

confidence: 99%

Nuclear Size and Shape Effect in Chemical Isotope Effect of Gadolinium Using Dicyclohexano-18-Crown-6

Fujii¹,

Yamamoto

Inagawa

et al. 1999

Solvent Extraction and Ion Exchange

View full text Add to dashboard Cite

Gadolinium isotopes were fractionated in a liquid-liquid extraction system using dicyclohexano-18-crown-6.The isotope enrichment factors showed breakdowns of the conventional Bigeleisen-Mayer approximation for every condition of the initial phases; the concentrations of gadolinium and hydrochloric acid and the type of organic solvents. The nuclear mass effect and the field shift effect were estimated by use of the isotope pairs 152Gd_I60Gd and 154Gd_16°Gd. Since both isotopes.P'Gd and 154Gd, have the unique characteristics of the nuclear charge radii, 's, the unusual isotope effects due to the field shifts took place, while the mass effects of the other isotopes canceled the field shift effects. The maximum isotope effect was observed to be 6160.152 = 0.0252 ± 0.0024 whose initial aqueous phase was 0.023 M GdCl, in 12 M HCl, and its organic phase was 0.2 M DC18C6 in chloroform: this was 0.00315 ± 0.00030 in terms of the enrichment factor for unit mass. 1219

show abstract

Section: Nuclear Size and Shape Effect In Chemical Isotope Effect Of mentioning

confidence: 99%

Nuclear Size and Shape Effect in Chemical Isotope Effect of Gadolinium Using Dicyclohexano-18-Crown-6

Fujii¹,

Yamamoto

Inagawa

et al. 1999

Solvent Extraction and Ion Exchange

View full text Add to dashboard Cite

show abstract

“…Niki et al [14] have reported isotope shifts in 20 transitions of the type 4f 7 5d6s6p to 4f 7 5d6s 2 using laser induced fluorescence spectroscopy in the wavelength region 5600-6000Å. Wakasugi et al [15] have measured isotope shift between all the stable isotopes of gadolinium in 8 lines of Gd I spectrum in the wavelength region 5600-6000Å using atomic beam laser spectroscopy technique and used this for the evaluation of δ r 2 . Recently Jia et al [16] have measured isotope shift in 7 two-photon transitions in Gd I using resonantly enhanced Doppler-free two photon spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Isotope shift studies in the spectra of Gadolinium in UV region and term shifts of high even levels of Gd I

Afzal

Venugopalan

Ahmad

1997

Z Phys D - Atoms, Molecules and Clusters

View full text Add to dashboard Cite

Isotope shift ∆σ( 156 Gd-160 Gd) is reported in 70 spectral lines of neutral gadolinium atom (Gd I) in the 3290-3920Å region providing isotope shift data in UV lines of Gd I spectrum for the first time. The measurements were carried out on a photoelectric recording Fabry-Perot Spectrometer using highly enriched isotopic samples of gadolinium. Term isotope shifts ∆T ( 156 Gd-160 Gd) have been evaluated for 48 high lying even parity energy levels of Gd I using this data; new ∆T values have been obtained for 24 levels. Electronic configurations 4f 7 5d6s6p, 4f 7 5d 2 6p and 4f 8 5d6s assigned earlier to these even levels have been either confirmed or configuration mixing pointed out in some of these levels. Probable assignment of 4f 8 5d6s configuration to 8 even levels between 32 930 and 35 500 cm −1 have been confirmed.

show abstract

“…Another check on our IS values is through the conventional King plot analysis [29] (Chapter 6). As a reference transition in the King plots, we used the 597.4 nm transition in Dy I, for which ISs have been measured [34,35] at a high accuracy (~2 MHz). Both fits were excellent straight lines (see Figure 3).…”

Section: Discussionmentioning

confidence: 99%

Hyperfine Structure and Isotope Shifts in Dy II

Papa

Holt

Rosner

2017

Atoms

View full text Add to dashboard Cite

Using fast-ion-beam laser-fluorescence spectroscopy (FIBLAS), we have measured the hyperfine structure (hfs) of 14 levels and an additional four transitions in Dy II and the isotope shifts (IS) of 12 transitions in the wavelength range of 422-460 nm. These are the first precision measurements of this kind in Dy II. Along with hfs and IS, new undocumented transitions were discovered within 3 GHz of the targeted transitions. These atomic data are essential for astrophysical studies of chemical abundances, allowing correction for saturation and the effects of blended lines. Lanthanide abundances are important in diffusion modeling of stellar interiors, and in the mechanisms and history of nucleosynthesis in the universe. Hfs and IS also play an important role in the classification of energy levels, and provide a benchmark for theoretical atomic structure calculations.

show abstract

Changes of the Nuclear Charge Distribution of Nd, Sm, Gd and Dy from Optical Isotope Shifts

Cited by 58 publications

References 19 publications

Nuclear Size and Shape Effect in Chemical Isotope Effect of Gadolinium Using Dicyclohexano-18-Crown-6

Nuclear Size and Shape Effect in Chemical Isotope Effect of Gadolinium Using Dicyclohexano-18-Crown-6

Isotope shift studies in the spectra of Gadolinium in UV region and term shifts of high even levels of Gd I

Hyperfine Structure and Isotope Shifts in Dy II

Contact Info

Product

Resources

About