Isotope shift and hyperfine structure in Lu i and W i

Abstract

Isotope shifts and hyperfine structures of four transitions in W I have been measured as well as isotope shifts in Lu I by means of atomic-beam laser spectroscopy. Magnetic-dipole hyperfine constants 3 of '"W are determined for the atomic states 'D&, 'F&, and 'F3 of the 5d 6s6p configuration. The nuclear parameters A, and 5(r') are derived for W stable isotopes. J dependences of the isotope shifts are observed for the D term of the 5d6s configuration in LuI and the 'D term of the 5d 6s configuration in WI. Parameters z, d of the crossed-second-order effects are derived for the LuI Sd6s and WI 5d 6s configurations, and zsd /A, is found to be 411(26) MHz/fm for W. A systematic behavior of the normalized parameter z"t /A, g", is discussed. PACS number(s): 32.30.Jc, 32.70.Jz, 35.10,Fk, 21.90.+ f

Mass independent bias in W isotopes in MC-ICP-MS instruments

“…3 Nuclear mean-squared charge radii as a function of mass for W isotopes. 36,37 The two experimental determinations agree closely. instruments.…”

“…The magnitude of a potential mass-independent isotope shift in creating 183 W deficits was determined by treating the d 186 W as a variable, and calculating the nuclear volume isotope effect using the relationship between d 18n W and d 186 W in terms of the difference between their mean-squared nuclear charge radii. 35 Aufmuth et al 36 and Jin et al 37 measured the isotope shift in W using Fabry-Perot spectrometry and atomic-beam laser spectroscopy, respectively. From their experimental data, differences in mean-squared nuclear charge radii (dhr 2 i) as a function of nuclide mass are plotted for W isotopes in Fig.…”

Origin of the analytical 183W effect and its implications for tungsten isotope analyses

“…It is important to recognize that this questionable value for 183 W from Angeli 49 has been abandoned in the most recent compilation of nuclear charge radii by Angeli and Marinova, 52 which, instead, provides a self-consistent data set that is in line with direct measurements of differences in mean-square nuclear charge radii for W isotopes using optical isotope shifts (OIS). Despite utilizing different techniques, such studies have obtained very consistent δ 〈 r 2 〉 values, 53–55 which is testament to the generally high accuracy and precision of data obtained by OIS. These δ 〈 r 2 〉 values show only subtle deviations from a mass-dependent trend (most pronounced for 180 W and 182 W) and, therefore, do not support a disproportionally small nuclear charge radius of 183 W (Fig.…”

High resolution isotope shifts and hyperfine structure measurements of tungsten by laser-induced fluorescence spectroscopy

“…King plot of the modified isotope shifts of 384.9 nm, 400.9 nm and 407.4 nm transitions with the 543.5 nm transition from W.G. Jin[20] as the reference transition. Factor of…”