The molecular beam electric resonance technique has been used to examine the hyperfine spectrum of RbF. The Rb nuclear electric quadrupole interaction, the spin-rotation interactions, and tensor and scalar spin-spin interactions have been measured for both Rb isotopes, including their dependence on vibrational and rotational states. Transition frequencies have been determined to a precision of ...

Although the technique of Mcissbauer spectroscopy is now 25-years old and widely used, little empirical work has been done to determine its accuracy in measurements on minerals. To solve this deficiency, two mineral standards (a grunerite and an almandine/andradite garnet mix) have been selected. Precision of the technique was measured through five different sets of experiments seeking to analy...

We report experimental investigations of a single-ion optical frequency standard based on Yb+. The ion is confined in a cylindrically symmetric radiofrequency Paul trap. The reference transition is the S1/2 F=0 – D3/2 F =2 electric quadrupole transition at 688 THz. Using a differential measurement scheme, we determine the shift of the reference transition frequency that occurs due to the intera...

We propose a collective model formalism which describes the strong parity shift observed in low-lying spectra of nuclei with octupole deformations together with the fine rotational band structure developed at higher angular momenta. The parity effect is obtained by the Schrödinger equation for oscillations of the reflection asymmetric (octupole) shape between two opposite orientations in an ang...

The nuclear magnetic resonance of Zn in hexagonal close-packed Zn metal has been observed at 4.2 K by pulsed NMR with three different frequencies. The spin echo profile showed a well resolved powder pattern due to electric quadrupole interaction. The quadrupole coupling constant was determined to be e q Q/h = 12.0 (4) MHz. The spinspin and spin-lattice-relaxation times were measured to be T2 = ...

A collective Hamiltonian for the rotation–vibration motion of nuclei is considered, in which the axial quadrupole and octupole degrees of freedom are coupled through the centrifugal interaction. The potential of the system depends on the two deformation variables β2 and β3. The system is considered to oscillate between positive and negative β3-values, by rounding an infinite potential core in t...

The dynamics of half-integer quadrupole spins ~I5 3 2 , 5 2 , 7 2 , and 9 2 ! during the multiple-quantum ~MQ! magic-angle spinning experiment with the two-pulse sequence, a recent NMR method, is analyzed in order to scale in frequency unit and label in ppm ~the chemical shift unit! the high-resolution isotropic axis of a two-dimensional ~2D! spectrum. Knowledge of the two observed chemical shi...