Correction to Bond Fission and Non-Radiative Decay in Iridium(III) Complexes

Superallowed Fermi beta decay: the radiative correction

Precision studies of superallowed beta decay are used to determine the Cabibbo-KobayashiMaskawa (CKM) matrix element Vud and to study the matrix’s unitarity. To reach this goal, however, the experimental β-decay rates need to be corrected for radiative and isospin-symmetry-breaking effects. The radiative correction, which in total is around 4%, is conveniently divided into terms that are nucleu...

Radiative Corrections to Muon and Neutron Decay

The corrections to muon decay due to electromagnetic interactions have been recalculated. Our results differ from those of Behrends, Finkelstein, and Sirlin, because those authors used an inconsistent method for handling the infrared divergences which arise separately in the real and virtual processes. The disagreement is especially significant near the end of the electron (positron) spectrum w...

Non-radiative decay paths in rhodamines: new theoretical insights.

We individuate a photoinduced electron transfer (PeT) as a quenching mechanism affecting rhodamine B photophysics in solvent. The PeT involves an electron transfer from the carboxylate group to the xanthene ring of rhodamine B. This is finely modulated by the subtle balance of coulombic and non-classical interactions between the carboxyphenyl and xanthene rings, also mediated by the solvent. We...

Hyperon radiative decay.

Ultrafast non-radiative decay of gas-phase nucleosides.

The ultrafast photo-physical properties of DNA are crucial in providing a stable basis for life. Although the DNA bases efficiently absorb ultraviolet (UV) radiation, this energy can be dissipated to the surrounding environment by the rapid conversion of electronic energy to vibrational energy within about a picosecond. The intrinsic nature of this internal conversion process has previously bee...