نتایج جستجو برای: quadrupole shift
تعداد نتایج: 145259 فیلتر نتایج به سال:
Measurements of nondipole parameters in spin-orbit-resolved Xe 4d photoionization demonstrate dynamical differences arising from relativistic effects. The experimental data do not agree with relativistic random-phase approximation calculations of single ionization dipole and quadrupole channels. It is suggested that the discrepancy is due to the omission of multiple-excitation quadrupole channe...
The isomer shift calibration constants have been calculated for 57.60 keV in 127I and for 27.72 keV in 129I resonant transitions by density functional theory. The full-potential linearized augmented plane-wave method (FLAPW) was applied in the scalar-relativistic approach. The NaI compound was used to set the origin of the scales in both cases. On the basis of the existing experimental data, th...
We studied the electric quadrupole interactions of Oxygen isotopes in a T i 0 2 single crystal. For l 3 0 and 1 9 0 nuclei, quadrupole coupling constants were measured by the /3-NMR technique, and for the 1 7 0 nucleus the FT-NMR technique was utilized. We synthesized a T i0 2 single crystal which was enriched in 1 7 0 up to 5 atom % to observe NMR signals without any perturbations from impurit...
Small transverse magnetic quadrupole fields sharply degrade the confinement of non-neutral plasmas held in Malmberg-Penning traps. For example, a quadrupole magnetic field of only 0.02 G/cm doubles the diffusion rate in a trap with a 100 G axial magnetic field. Larger quadrupole fields noticeably change the shape of the plasma. The transport is greatest at an orbital resonance. These results ca...
Currently there are no UXO discrimination techniques based on total-field magnetic sensor data that rely on multipole expansion parameters of higher order than the dipole. In some cases, however, it can be advantages to describe a UXO target with both dipole and quadrupole parameters. In this paper, we examine the properties of the quadrupole moment and illustrate them using a synthetic example...
Nitrogenase consists of two proteins: an iron containing protein and an iron and molybdenum (FeMo) containing protedl,21. Recent analyses[3] of MO EXAFS data of the FeMo protein and the FeMo COfactod41 isolated from it have led to the conclusion that the Mo atom is prinprily coordinated to sulfur and is separated by < 3 A from another metal atom, not Mo and,therefore, Fe, and that the Mo coordi...
Double resonance level crossing detection cannot normally be used to record transitions between the quadrupole Zeeman levels. Neither can it be used if the quadrupole resonance frequency is larger than the pro ton N M R frequency in high field. A simple variation of the level crossing experiment is demonstrated which allows energy to be efficiently transferred f rom quadrupole to proton system ...
Errors in the lattice parameters of a storage ring can come from many sources. For example, the calibration constants used to set quadrupole magnets may be inaccurate, the orbit may pass through the sextupoles off center, or there may be unsuspected quadrupole fields associated with machine elements. To verify that a design lattice has actually been implemented correctly, one or more selected l...
We present the analysis on the quadrupole phases of the Internal Linear Combination map, ILC(I) and (III) derived by the WMAP team (1 and 3-year data release). This approach allows us to see the global trend of non-Gaussianity of the quadrupoles for the ILC(III) map through phase correlations with the foregrounds. Significant phase correlations is found in between the ILC(III) quadrupole and th...
The energy shift in molecular spectra due to interaction of the nuclear magnetic quadrupole moment ($M$) with electrons is equal $\ensuremath{\delta}{E}_{M}=M{W}_{M}{P}_{M}$ where ${W}_{M}$ a constant determined by electronic structure molecule and ${P}_{M}$ dimensionless constant. We extended method for calculation parity nonconservation effects triatomic molecules developed Ref. [A. Petrov A....
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