Identification and quantitative determination methods of arsenic species in environmental and biological samples are discussed. Isolation followed by molecular spectroscopic determination is necessary for rigorous identification while element-specific detections coupled with separation techniques are the choice for quantitative determination. Analytical figures of merit are given for the method...

I consider an exact model of atomic spontaneous dipole emission and classical dipole radiation in a finite photonic band-gap structure. The full 3D or 2D problem is reduced to a finite 1D model, and then this is solved for analytically using algebraic matrix transfer techniques. The results give insight to the electromagnetic emission process in periodic dielectrics, quantitative predictions fo...

[1] Terrestrial thermospheric dayglow emission from the coupled and overlapping c0 4 Su (0) and b0 Su (1) levels of molecular nitrogen, observed by the Far Ultraviolet Spectroscopic Explorer, is analyzed with the aid of a coupled channels quantum mechanical model of N2 spectroscopy and predissociation dynamics. Model emission spectra for the mixed c0 4 Su (0) b0 Su(1) X Sg(vi = 2, 6–9) transiti...

Measurements of the temperature and density structure of the solar corona provide critical constraints on theories of coronal heating. Unfortunately, the complexity of the solar atmosphere, observational uncertainties, and the limitations of current atomic calculations, particularly those for Fe, all conspire to make this task very difficult. A critical assessment of plasma diagnostics in the c...

The shocked interstellar medium around IC443 produces strong X-ray emission in the soft energy band (E . 1.5 keV). We present an analysis of such emission as observed with the EPIC MOS cameras on board the XMM-Newton observatory, with the purpose to find clear signatures of the interactions with the interstellar medium (ISM) in the X-ray band, which may complement results obtained in other wave...

X-ray emission from hollow ions is a fascinating field of research for many different branches like, e.g., nuclear physics (interaction of heavy ion beams with matter), atomic physics (atomic structure investigations, correlation effects of multi-electron systems, autoionizing channels of configurations with multiple excited electrons). Moreover, hollow ion configurations and the corresponding ...

We investigated the spatial and temporal evolution of temperature and electron density associated with femtoand nanosecond laser-produced plasmas (LPP) from brass under similar laser fluence conditions. For producing plasmas, brass targets were ablated in vacuum employing pulses either from a Ti:Sapphire ultrafast laser (40 fs, 800 nm) or from a Nd:YAG laser (6 ns, 1064 nm). Optical emission sp...