We report a 67Zn nuclear magnetic resonance (NMR) study of compounds containing zinc ions coordinated by oxygen, nitrogen, and sulfur ligands. New information concerning 67Zn nuclear quadrupole coupling constants (NQCC) and chemical shift was obtained from magic-angle spinning (MAS) spectra of solid compounds containing both natural abundance and enriched 67Zn isotopes. Rapid ligand exchange pr...

The tolerances of a storage ring to its magnet imperfections largely depend upon the magnitude of the resulting tune shifts. A large tune shift would imply the potential danger of resonances and. hence. poor tolerances. When the errors are in field gradients or in random sextupole displacement. the cal cul ati ons of the RMS tune shi fts are strai ght forward. On the contra ry. when we cons i d...

We report a hitherto undiscovered frequency shift for forbidden J = 0-->J = 0 clock transitions excited in atoms confined to an optical lattice. These shifts result from magnetic-dipole and electric-quadrupole transitions, which have a spatial dependence in an optical lattice that differs from that of the stronger electric-dipole transitions. In combination with the residual translational motio...

High-resolution spectroscopy of xenon is performed on four transitions from the 5p S0 ground state to the 5d8@3/2#1 , 8d@1/2#1 , 8d@3/2#1, and 7s8@1/2#1 excited states ( j l-coupling notation! by means of 1VUV 11UV photoionization spectroscopy. Spectra of all nine stable isotopes are resolved enabling the determination of the hyperfine splittings and isotope shifts. Magnetic dipole ~for both Xe...

Gadolinium (Gd)-based magnetic resonance imaging (MRI) contrasting agents interfere with the determination of selenium (Se) when analysed by single quadrupole inductively coupled plasma-mass spectrometry (ICP-MS). This paper demonstrates that an ICP-triple quadrupole-MS (ICP-QQQ-MS) with oxygen mass shift overcomes Gd(++) interference on Se(+) and mitigates typically encountered matrix and spec...

Mossbauer effect has been observed for disordered and ordered Fel-,Pdx alloys. The internal field and the quadrupole and isomer shifts were obtained. The asymmetrical spectrum for 0.45 < x < 0.75 and the temperature dependence of isomer shifts for x = 0.32 were interpreted as a distribution of the quadrupole field and a second order Doppler effect respectively. With respect to the invar effect ...

It was recently demonstrated that lugh-resolution deutenum NMR m sohds may be accomphshed by magc angle sample spuming e\ren when the rotation frequency, wJ277 = 1 kHz, IS much less than the quadrupole coupling, WQ/21r = 4 %7-qQ/h = 130 l&I2 [l-4] The sample rotation removes the broademng of spectra of amorphous and polycrystalline samples due to the anlsotropic quadrupole and chemical-shift in...

The beam-based alignment algorithm for the NLC main linac requires that the magnetic-electrical offset between the center of each BPM and the center of its quadrupole be determined with an absolute accuracy on the order of microns via quadrupole shunting; this allows the quads to be moved such that the beam is passing through the quad centers to this accuracy. In this note we consider the range...

We report a multinuclear solid-state ( (23)Na, (39)K, (87)Rb, (133)Cs) NMR study of tetraphenylborate salts, M[BPh 4] (M = Na, K, Rb, Cs). These compounds are isostructural in the solid state with the alkali metal ion surrounded by four phenyl groups resulting in strong cation-pi interactions. From analyses of solid-state NMR spectra obtained under stationary and magic-angle spinning (MAS) cond...