The dependence of the nuclear quadrupole coupling constants (NQCC) on the interaction between electrons and a nucleus of finite size is theoretically analyzed. A deviation of the ratio of the NQCCs obtained from two different isotopomers of a molecule from the ratio of the corresponding bare nuclear electric quadrupole moments, known as quadrupole anomaly, is interpreted in terms of the logarit...

A lens system consisting of two electrostatic quadrupole triplets has been designed and constructed at the Radiological Research Accelerator Facility (RARAF) of Columbia University. The lens system has been used to focus 6-MeV (4)He ions to a beam spot in air with a diameter of 0.8 µm. The quadrupole electrodes can withstand voltages high enough to focus (4)He ions up to 10 MeV and protons up t...

In this report, electric quadrupole corrections to the two neutron removal cross section measured in heavy ion collisions are estimated for Au and Co targets. The quadrupole process is assumed to proceed primarily through excitation of the giant isovector quadrupole resonance, which then decays by neutron emission. For Co, the contribution from E2 radiation is found to be small, while for Au we...

For future linear colliders, with very small emittances and beam sizes and demanding tolerances on final focus system alignment and magnet errors, it becomes incress-ingly important to use the beam as a diagnostic tool. We report here procedures we have identified and will be implemented in the Final Focus Test Beam at SLAC incorporating i) quadrupole strength changes, ii) central orbit modific...

Solid-state 185/187 Re NMR spectral evidence for the origin of high-order quadrupole-induced eff ects HOT ARTICLE Dolnik et al. Locking of Turing patterns in the chlorine dioxide–iodine–malonic acid reaction Definitive solid-state 185/187 Re NMR spectral evidence for and analysis of the origin of high-order quadrupole-induced effects for I = 5/2w Rhenium-185/187 solid-state nuclear magnetic res...

Calculations and measurements of the Xe 5s and 5p nondipole photoelectron asymmetry parameters are obtained which present clear evidence of the existence of quadrupole Cooper minima, i.e., minima in quadrupole matrix elements as a function of energy, in the photoionization process. This verifies earlier predictions of quadrupole Cooper Minima. ‡ Present address: Laboratoire de Chimie Physique-M...

Mass spectrometry-based proteomics has greatly benefitted from enormous advances in high resolution instrumentation in recent years. In particular, the combination of a linear ion trap with the Orbitrap analyzer has proven to be a popular instrument configuration. Complementing this hybrid trap-trap instrument, as well as the standalone Orbitrap analyzer termed Exactive, we here present couplin...

This paper reports on recent experimental studies of quadrupole moments and reduced transition probabilities in atomic nuclei. First, based on the deduced B(E2) transition strength from a measurement of lifetimes, Ce is suggested as a benchmark for the X(5) critical point symmetry in the mass A ≈ 130 region. Next, a quadrupole moment measurement of the 29 2 − bandhead of a magnetic rotational b...

We introduce a new platform for quantum simulation of many-body systems based on nonspherical atoms or molecules with zero dipole moments but possessing a significant value of electric quadrupole moments. We consider a quadrupolar Fermi gas trapped in a 2D square optical lattice, and show that the peculiar symmetry and broad tunability of the quadrupole-quadrupole interaction results in a rich ...

Relativistic coupled cluster theory is used to determine accurate electric field gradients in order to provide a theoretical value for the nuclear quadrupole moment of (139)La. Here we used the diatomic lanthanum monohalides LaF, LaCl, LaBr, and LaI as accurate nuclear quadrupole coupling constants are available from rotational spectroscopy by Rubinoff et al. [J. Mol. Spectrosc. 218, 169 (2003)...