Orbital angular momentum (Renner–Teller) effects in the [sup 2]Π[sub i] ground state of silicon methylidyne (SiCH)

2001 ◽  
Vol 114 (2) ◽  
pp. 725 ◽  
Author(s):  
Tony C. Smith ◽  
Haiyang Li ◽  
David A. Hostutler ◽  
Dennis J. Clouthier ◽  
Anthony J. Merer
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Ground State

A linear cobalt(II) complex with maximal orbital angular momentum from a non-Aufbau ground state

Science ◽  
2018 ◽  
Vol 362 (6421) ◽  
pp. eaat7319 ◽  
Author(s):  
Philip C. Bunting ◽  
Mihail Atanasov ◽  
Emil Damgaard-Møller ◽  
Mauro Perfetti ◽  
Iris Crassee ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Ground State ◽  
Dominant Role ◽  
Far Infrared ◽  
Wave Number ◽  
Ligand Field ◽  
Electron Configuration ◽  
Susceptibility Data

Orbital angular momentum is a prerequisite for magnetic anisotropy, although in transition metal complexes it is typically quenched by the ligand field. By reducing the basicity of the carbon donor atoms in a pair of alkyl ligands, we synthesized a cobalt(II) dialkyl complex, Co(C(SiMe2ONaph)3)2 (where Me is methyl and Naph is a naphthyl group), wherein the ligand field is sufficiently weak that interelectron repulsion and spin-orbit coupling play a dominant role in determining the electronic ground state. Assignment of a non-Aufbau (dx2–y2, dxy)3(dxz, dyz)3(dz2)1 electron configuration is supported by dc magnetic susceptibility data, experimental charge density maps, and ab initio calculations. Variable-field far-infrared spectroscopy and ac magnetic susceptibility measurements further reveal slow magnetic relaxation via a 450–wave number magnetic excited state.

scholarly journals DOUBLE-VALUEDNESS OF THE ELECTRON WAVEFUNCTION AND ROTATIONAL ZERO-POINT MOTION OF ELECTRONS IN RINGS

2010 ◽  
Vol 24 (21) ◽  
pp. 2201-2214 ◽  
Author(s):  
J. E. HIRSCH
Keyword(s):  
Angular Momentum ◽  
Aromatic Ring ◽  
Orbital Angular Momentum ◽  
Ground State ◽  
Spin Current ◽  
Zero Point ◽  
Persistent Currents ◽  
Ring Molecules ◽  
Point Motion ◽  
Electron Wavefunction

I propose that the phase of an electron's wavefunction changes by π when the electron goes around a loop maintaining phase coherence. Equivalently, that the minimum orbital angular momentum of an electron in a ring is ℏ/2 rather than zero as generally assumed, hence, that the electron in a ring has azimuthal zero point motion. This proposal implies that a spin current exists in the ground state of aromatic ring molecules and suggests an explanation for the ubiquitousness of persistent currents observed in mesoscopic rings.

New empirical formula for α-decay calculations

2018 ◽  
Vol 27 (08) ◽  
pp. 1850068 ◽  
Author(s):  
Dashty T. Akrawy ◽  
Ali H. Ahmed
Keyword(s):  
Experimental Data ◽  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Ground State ◽  
Empirical Formula ◽  
State Transitions ◽  
Α Decay ◽  
O Isotopes

A set of empirical formulae have been proposed to calculate the [Formula: see text]-decay half-lives from ground state to ground state transitions of 356 nuclei classified to different set of e–e, e–o, o–e and o–o isotopes. Within these formulae, modification of the previous set of Royer expressions were done by introducing three different physical terms, including the orbital angular momentum and isobaric asymmetry factors. The predicted [Formula: see text]-decay half-lives compared with those adopted by former proposed models for the depended experimental data, and significant improvements were noticed for all the studied sets of isotopes.

scholarly journals ULTRA-COLD GASES AND THE DETECTION OF THE EARTH'S ROTATION: BOGOLIUBOV SPACE AND GRAVITOMAGNETISM

2012 ◽  
Vol 27 (34) ◽  
pp. 1250198 ◽  
Author(s):  
A. CAMACHO ◽  
E. CASTELLANOS
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Speed Of Sound ◽  
Ground State ◽  
Single Atom ◽  
Earth’S Rotation ◽  
Cold Gases ◽  
Thermodynamical Properties ◽  
The Earth ◽  
Number Of Particles

The present work analyses the consequences of the gravitomagnetic effect of the Earth upon a bosonic gas in which the corresponding atoms have a nonvanishing orbital angular momentum. Concerning the ground state of the Bogoliubov space of this system we deduce the consequences, on the pressure and on the speed of sound, of the gravitomagnetic effect. We prove that the effect on a single atom is very small, but we also show that for some thermodynamical properties the consequences scale as a nontrivial function of the number of particles.

THE STRUCTURE OF 11Li: A “RYDBERG” NUCLEUS?

1993 ◽  
Vol 08 (04) ◽  
pp. 295-299 ◽  
Author(s):  
T. FREDERICO ◽  
M.S. HUSSEIN
Keyword(s):  
Angular Momentum ◽  
Long Range ◽  
Orbital Angular Momentum ◽  
Ground State ◽  
Rydberg States ◽  
Efimov States

The effective long range R−2 interaction between 9Li and the two neutrons (slightly bound) is taken here responsible for the loosely bound 11Li nucleus. A large number of these loosely bound Rydberg states is expected to be generated. Similarities to Efimov states are pointed out. It is pointed out that values of the orbital angular momentum of up to 3ħ may contribute to the structure of the ground state.

Advanced Mode Unity Using Loop Antennas Proximate to Reflector for Orbital Angular Momentum Communication

2018 ◽  
Author(s):  
Ryohei Yamagishi ◽  
Hiroto Otsuka ◽  
Ryo Ishikawa ◽  
Akira Saitou ◽  
Hiroshi Suzuki ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Loop Antennas
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