The helium-like argon spectrum is measured for the plasma in the Large Helical Device (LHD). The electron temperature Te derived from the intensity ratio of the resonance line (1s2 S0 – 1s2p P1) to a dielectronic satellite line (1s22p P1/2 – 1s2p2 D3/2) is consistent with the central Te measured with the Thomson scattering method when the electron density ne has a peaked profile. The ion temper...

The calculation of the Doppler broadening function   , x   and of the interference term  ,  x   are important in the generation of nuclear data. In a recent paper, Goncalves and Martinez proposed an analytical approximation for the calculation of both functions based in sine and cosine Fourier transforms. This paper presents new approximations for these functions,  ,  x   and   , ...

[1] Novel optical measurements of F-region ion temperatures have been made in conjunction with thermospheric neutral temperatures. A ground-based FabryPerot interferometer has been used to observe high-latitude Fregion ion temperatures using the O(P) auroral emission at 732 nm, and upper-thermospheric neutral temperatures using the O(D) airglow emission at 630 nm. Dual wavelength measurements w...

Results of a series of experiments on pressure effects caused by various foreign gases on the 535.0 nm TI fluorescence line emitted due to the photodissociation of Til-molecules are summarized and some aspects of the Doppler and pressure broadening of this line are discussed. The impact broadeningand shift-cross sections are determined for two sets of mean relative velocities f of the emitter-p...

We report on a novel noninvasive method to determine the normal mode frequencies of ion Coulomb crystals in traps based on the resonance enhanced collective coupling between the electronic states of the ions and an optical cavity field at the single photon level. Excitations of the normal modes are observed through a Doppler broadening of the resonance. An excellent agreement with the predictio...

We consider the spectra of Thomson-thick, geometrically-thin accretion discs around Galactic black hole candidates in the reeection model and compute their iron K edges and iron K lines. We compare the smeared iron K edge prooles that we compute with observation and nd them to be a satisfactory description of the data. We nd that a combination of Doppler broadening and resonant Auger destructio...

Recently, Narayan & Raymond (1999) proposed that the thermal emission lines from the hot plasma in advection dominated accretion flows (ADAFs) are potentially observable with the next generation of X-ray observatories, with which the physical properties of some X-ray sources can be probed. In ADAFs, the temperature of the ion is so high that the thermal broadening of the line is important. We c...

Doppler and transit broadening effects inherent in a thermal atomic beam reduce the size of quantum fluctuations in a cavity QED system. A cold continuous atomic beam would reduce these effects, but would not eliminate the different atom–field couplings associated with the random distribution of atoms throughout the cavity. We present results that describe the effect that this has on quantum fl...

Positron Annihilation Doppler Broadening Spectroscopy (PADBS) is a characterization technique that is sensitive to damage of radiation in polymers. A damage zone or defect will be created due to the irradiation of Polyallyl diglycol carbonate (CR-39) with α-particles. It is convenient to study this defect caused by α-particle energies using both PADBS and track diameter measurements. An abrupt ...