Quadrupole Interaction of the SrTiO3:V4+ System

<div>Analysis were made to calculate the quadrupole interaction of the Jahn-Teller SrTiO3 system from enhanced EPR spectra due to an applied static electric field. The calculations gave a value for the quadrupole constant |P| = (-2.142 0.005)×10-4 cm-1</div>

Quadrupole Interaction of the SrTiO3:V4+ System

<div>Analysis were made to calculate the quadrupole interaction of the Jahn-Teller SrTiO3 system from enhanced EPR spectra due to an applied static electric field. The calculations gave a value for the quadrupole constant |P| = (-2.142 0.005)×10-4 cm-1</div>

The Rotational Spectrum of (17O)Ketene

The rotational spectrum of H2CC17O in the ground vibrational state has been investigated between 20 and 330 GHz. From 82 R-branch transitions a set of rotational constants and several centrifugal distortion constants could be derived, employing the Watson 5-reduction formalism. The obtained rotational constants in MHz are: A = 282071.6(223), B = 10013.4764(28), C = 9655.9118(24). The nuclear quadrupole coupling structure of the J'Ka'Kc' <- JKaKc = 101 O00 line has been recorded by means of molecular beam Fourier transform microwave spectroscopy allowing the determination of the nuclear quadrupole constant Xaa. = -1.534(54) MHz (without considering the spin-rotation interaction). A recalculation of the rs-structure has also been carried out, using the constants of the new isotopomer. The result agrees with the values reported by East et al. in 1995. This is, to our knowledge, the first reported investigation of the H2CC17O rotational spectrum.