نتایج جستجو برای: 2h isotope shift
تعداد نتایج: 178729 فیلتر نتایج به سال:
We show that climate and topography control the spatial distribution of stable isotope values on South Island New Zealand, based a spatially dense (n = 193) river isotopic survey. Our data ?18O minimum in east Southern Alps demonstrates topographically driven continentality associated with Alps, which intersect prevailing, moisture-laden westerlies. define surface water line ?2H 8.17 (±0.26) × ...
In this Letter we explore the potential of probing new light force-carriers, with spin-independent couplings to the electron and the neutron, using precision isotope shift spectroscopy. We develop a formalism to interpret linear King plots as bounds on new physics with minimal theory inputs. We focus only on bounding the new physics contributions that can be calculated independently of the Stan...
The specific mass shift in the electron affinity between 35Cl and 37Cl has been determined by tunable laser photodetachment spectroscopy to be −0.51(14) GHz. The isotope shift was observed as a difference in the onset of the photodetachment process for the two isotopes. In addition, the electron affinity of Cl was found to be 29 138.59(22) cm−1, giving a factor of 2 improvement in the accuracy ...
Isotope shifts in dielectronic recombination spectra were studied for Li-like (A)Nd(57+) ions with A=142 and A=150. From the displacement of resonance positions energy shifts deltaE(142 150)(2s-2p(1/2))=40.2(3)(6) meV [(stat)(sys)] and deltaE(142 150)(2s-2p(3/2))=42.3(12)(20) meV of 2s-2p(j) transitions were deduced. An evaluation of these values within a full QED treatment yields a change in t...
A temporal change in the stable isotope (SI) composition of jellyfish in the Kiel Fjord, Western Baltic Sea, was documented by analyzing δ13C, δ15N and δ34S of bell tissue of Aurelia aurita and Cyanea capillata in the period between June and October 2011. A strong and significant temporal change in all SI values of A. aurita was found, including an increase of ~3 ‰ in δ13C, a decrease of ~4 ‰ i...
The investigation of halo nuclei has attracted much attention within the last decade and many approaches for a description of this exotic structure have been developed [1]. However, the fundamental question of how much the core nucleons are affected by the presence of the halo-forming nucleons has not yet been resolved. Hence, an experimental determination of the rms charge radius of the neutro...
A rapid continuous-Ñow technique for the quantitative determination of hydrogen isotope ratios in organic materials and water, at natural abundance levels, is described. Samples are pyrolysed in a helium stream at 1080 ÄC over an inert form of carbon. Hydrogen is separated from the other pyrolysis gases by gas chromatography and enters the ion source of the isotope ratio mass spectrometer (IRMS...
This study investigated the relationship between 18O and 2H isotopes in samples of Mexican hair drinking water. The purpose this was twofold: to quantify tap water, order understand impact water stress differing socioeconomic status on accurate predictions water; determine whether currently existing semimechanistic models can accurately represent used a subset paired human (n = 62) 76). Isotope...
We revisit the problem of the kink in the charge radius shift of neutron-rich even isotopes near the N=126 shell closure. We show that the ability of a Skyrme force to reproduce the isotope shift is determined by the occupation of the neutron 1i(11/2) orbital beyond N=126 and the corresponding change it causes to deeply-bound protons orbitals with a principal quantum number of 1. Given the obse...
Abstract. Stable water isotopes in marine boundary layer vapour are strongly influenced by the strength of air–sea fluxes. Air–sea fluxes extratropics modulated large-scale atmospheric flow, for instance advection warm and moist air masses sector extratropical cyclones. A distinct isotopic composition latter environment has been observed over Southern Ocean during 2016/2017 Antarctic Circumnavi...
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