The 1 N hyperfine multiplets of low-7 rotational transitions of the E and Z isomers of HN = CH — C = N, produced by flash pyrolysis from (CH 3 ) 2N —C = N as precursor, were observed and analysed. The quadrupole coupling constants determined are (c-axis perpendicular to the molecular plane): , Xaa/MHz XJUWz XJUHz E H — N = CH — C = N -4 .160(10) +1.658(31) +2.502(31) E H N = C H C = N +0.764(11...

An ab initio calculation of double zeta quality on glycyl-glycine at the crystal structure yielded nuclear quadrupole coupling constants at the peptide centres very close to experiment; yzz — 3.03, XyV + 2.14, /.v.v + 0.89 MHz. The first two couplings lie in the local jr-direction, and along the C-N bond, respectively. At the NHf centre the values were less satisfactory, but the (low) positive ...

Time-domain zero-field NQR methods are used to determine quadrupole coupling constants and asymmetry parameters for a variety of polycrystalhne solids. Results for aliphatic and aromatic groups are reported. Several cases are presented in which sites with small differences in quadrupole coupling constants are resolved, and very smah (CO. 1) asymmetry parameters are measured. Structure in the ze...

To establish a self-consistent system of mutually interacting gravitational quadrupoles, a characteristic number N of quantum masses μ are related to a characteristic velocity scaling. For this purpose a critical reference is defined by the flux and flux number of mass quanta constituting a confining unit field generating mass mG = Nμ. In the field of mG any small test mass orbits at unit dista...

The static and dynamics properties of hydration water molecules in (±)-[Co(en)3]Cl3 were studied by means of 'H, H, and , 0 solid state NMR. By 'H pulsed field gradient (PFG) NMR the apparent diffusion coefficient of mobile water through a micropore along the crystalline unique c-axis was found to be 1.0 x 10~ m s 1 . The H NMR spectrum at 141 K consists of two components, one being a Pake doub...

The successive phase transitions of [Mg(H?0)6][SiF6] were studied by measuring 2 H NMR spectra. The quadrupole coupling constant eQq/h and asymmetry parameter 77 changed drastically at each transition temperature. 1 2 H and 1 F NMR T\ were measured for this compound to study the relation between the molecular motions and the successive phase transitions. The activation energy Ea and the pre-exp...

Powder Zeeman NQR spectra of Sb in Sb(C6H5)3 were studied by means of a computer simulation and an experiment. TheSb nucleus has spin 7/2. There are two non-equivalentSb atoms in the crystal of Sb(C6H5)3, so that there are two series of three transition lines (higher series: 1h, 2h, 3h; lower series: 1l, 2l, 3l). The powder Zeeman spectra for 1h, based on the transition between the levels mI = ...

Seventyseven a-type rotational transitions of Orthofluorobenzonitrile were observed and assigned in the 8 — 25 GHz frequency range. The spectrum was recorded using the high resolution microwave Fourier transform spectrometer constructed at Kiel University. For most transitions the l4N quadrupole hfs patterns could be fully resolved. The spectroscopic constants obtained by a fit to the observed ...

Most of the quadrupole magnets in the KEK B-factory are accompanied by a set of vertical and horizontal dipole corrector magnets in both the LER and HER rings[1]. The typical separation between a quadrupole and a dipole corrector magnet is 202 mm, as measured from the laminated ends. This corresponds to ~3.7 (2.4) times of the bore radius of a quadrupole magnet in the arc (straight) sections. S...