Contributions to the gas-to-liquid chemical shifts of water arising from the electric field gradient of the surrounding molecules have been calculated as a function of the temperature. Since the theoretical model is based on perturbation theory, this part of the chemical shift may be calculated from quadrupole shielding polarizabilities and statistical mechanical ensemble averages of external e...

We investigate the nature of higher-order effects arising in solid-state nuclear magnetic resonance ~NMR! when quadrupolar nuclei are subject to significant chemical shift anisotropies. It is shown that the quadrupole interaction can give rise to shielding-derived terms that are not entirely averaged away by conventional magic-angle spinning ~MAS!. These terms are proportional to the square of ...

My previous calculations of the Lamb shift in muonic hydrogen are reviewed and compared with other work. In addition, numerical results for muonic deuterium are presented. Introduction The energy levels of muonic atoms are very sensitive to effects of quantum electrodynamics (QED), nuclear structure, and recoil, since the muon is about 206 times heavier than the electron [1]. A number of theore...

Precise values are reported for a quite large (95)Mo quadrupole coupling and an unusually large (95)Mo chemical shift anisotropy in MoS(2), values that have been retrieved by analysis of a well-resolved, highly complex 14.1 T (95)Mo MAS NMR spectrum displaying both the central and satellite transitions.

We present an analysis of the cross-correlation for the WMAP ILC(III) low multipoles and foregrounds and show that these correlations are very high. By analysis of the 10 Monte Carlo simulations of the CMB-foreground separation presented by Eriksen et al. 2004a, we show that most likely the Lagrangian Internal Linear Combination method (LILC) produced negative shift of the distribution function...

The motion of an ion in a radiofrequency (rf) Paul trap is described by the Mathieu equation and associated stability parameters that are proportional to rf dc electric field gradients. Here, higher-order, iterative method accurately solve from measured secular frequencies presented. It then used characterize endcap showing trap's radial asymmetry dominated gradients measuring relation between ...

Li(+) and Ca(2+) binding to the carbonyl oxygen sites of a model peptide system has been studied by (17)O solid-state NMR spectroscopy. (17)O chemical shift (CS) and quadrupole coupling (QC) tensors are determined in four Gly-(Gly-(17)O)-Gly polymorphs by a combination of stationary and fast magic-angle spinning (MAS) methods at high magnetic field, 19.6 T. In the crystal lattice, the carbonyl ...

We have developed a technique that uses the tensor light shift to measure and cancel the frequency shift produced by the quadrupolar anisotropy of a vapor cell. We demonstrate the technique on the 6S1/2, F = 4 level of Cs using the D1 transition. The method extends our ability to study quadrupolar wall interactions beyond diamagnetic atoms. We have deduced the twist angle per wall adhesion for ...