We refer to ultra-peripheral heavy ion collisions, as those nuclear interactions with a impact parameter, b, larger than twice the nuclear radius RA, where no hadronic nucleon-nucleon collisions occur . The large charge of a relativistic heavy nucleus is a strong source of quasi-real photons. Exclusive ρ meson production AuAu→AuAuρ0 can then be described by the vector meson dominance model : a ...

solitary pulmonary nodule (spn) is a frequent finding on the chest x-ray and computed tomography. nuclear medicine techniques play an important role in the diagnosis and management of spn. in the current review, we briefly will explain the different nuclear medicine modalities in this regard including positron emission tomography (pet) using 18-f-fdg, and 11-c-methionine, and single photon emis...

* This work supported by the U.S. Department of Energy under Contract No. DE-AC03-76SF00098 Abstract We present an updated design for a proposed source of ultra-fast synchrotron radiation pulses based on a recirculating superconducting linac [1,2], in particular the incorporation of EUV and soft x-ray production. The project has been named LUX – Linac-based Ultrafast X-ray facility. The source ...

Being motivated by the controversial results based on two dispersion models and Weisskopf–Wigner approximation (WWA), we introduce, for the first time to our knowledge, the position-dependent photon-atom interaction into the Green function method of the evolution operator and develop a universal theoretical approach to study spontaneous emission of atoms in photonic crystals (PCs). A position-s...

Two-photon imaging is potentially a powerful technique for the early diagnosis of epithelial cancer because it permits non-invasive imaging at the micron scale hundreds of microns deep into scattering tissue. Though it is possible to discriminate cancerous and healthy tissue based on two-photon imaging from endogenous fluorophores, two-photon contrast agents have the ability to increase signal-...

We report on the room temperature polariton lasing and photon lasing in a ZnO-based hybrid microcavity under optical pumping. A series of experimental studies of the polariton lasing (exciton-photon detunings of δ = -119 meV) in the strong-coupling regime are discussed and compared to a photon lasing (δ = -45 meV) in the weak-coupling regime obtained in the same structure. The measured threshol...

In this work, we provide an overview of how well-established concepts in the fields of quantum chemistry and material sciences have to be adapted when the quantum nature of light becomes important in correlated matter-photon problems. We analyze model systems in optical cavities, where the matter-photon interaction is considered from the weak- to the strong-coupling limit and for individual pho...