The molecular oxygen or dioxygen (O 2 ) molecule has 6 molecular orbitals (MO) in its triplet state, of which the two π 2p ∗ MO contain each one electron. Thus, O 2 has two unpaired electrons (indicated by a dot ); that is, O 2 is an uncharged diradical molecule: O–O. An electron that is donated by another molecule is incorporated in one of the two π 2p ∗ MO of the O 2 molecule; that is, one π ...

The oxidation potential of thioethers constrained to be near aromatic rings is lowered, due to an antibonding interaction between the p-type sulfur lone pair with the neighboring phenyl π-system which on removal of an electron becomes a new kind of 3-electron S∴π bonding that reveals itself in the photoelectron spectrum and by an electronic transition involving the orbitals participating in the...

The experimental study of the electron cloud dynamics and mitigation techniques is one of the main objectives of the CESR Damping Ring Test Accelerator (Cesr-TA) program. Shielded pick-up buttons are a relatively simple diagnostic device for obtaining time-resolved information on the electron cloud density. They have been already successfully employed on the SPS at CERN [1], although with diffe...

The internal s-electron polarization in the ground state of a Friedel-Anderson and a Kondo impurity is calculated. The Wilson basis with exponentially fine energies close to the Fermi level is used and expressed in terms of free electron waves with linear energy-momentum dispersion. It is found that in the singlet state the magnetic moment of the d-electron is screened by an s-electron cloud. T...

We report a previously unknown resonance for electron cloud dynamics. The 2D simulation code “POSINST” was used to study the electron cloud buildup at different z positions in the International Linear Collider positron damping ring wiggler. An electron equilibrium density enhancement of up to a factor of 3 was found at magnetic field values for which the bunch frequency is an integral multiple ...

Electron cloud has been identified as one of the highest priority issues for the international Linear Collider (ILC) Damping Rings (DR). An electron cloud Working Group (WG) has evaluated the electron cloud effect and instability, and mitigation solutions for the electron cloud formation. Working group deliverables include recommendations for the baseline and alternate solutions to the electron...

Localised mobile channel support is now a feature of Communicating Process Architecture (CPA) based frameworks, from JCSP and C++CSP to occamπ. Distributed mobile channel support has also been attempted in JCSP Networking and occam-π via the pony framework, although the capabilities of these two separate approaches is limited and has not led to the widespread usage of distributed mobile channel...

Abstract Electronic interactions in donor-π-linker-acceptor systems with barbituric acid as an electron acceptor and possible donor were investigated to screen promising candidates a push–pull character based on experimental quantum chemical studies. The tautomeric properties of 5-benzylidenebarbituric derivatives studied NMR spectra, spectrophotometric determination the pKa values, calculation...