A very extensive compilation of Stark widths and shifts for more than 125 Ar II visible spectral lines is presented in this work. These atomic parameters have been measured a pulsed discharge lamp by using different mixtures pure argon or helium. The electron density, which typically ranges from 0.2 to has determined interferometrically and, the case plasmas, also spectroscopically -Stark broadening. excitation temperature (15 000-31 000 K) Boltzmann-plot techniques intensity lines. detailed...

Citation information : Matesanz BM, Issolio L, Arranz I, de la Rosa C, Menéndez JA, Mar S & Aparicio JA. Temporal retinal sensitivity in mesopic adaptation. Ophthalmic Physiol Opt 2011, 31 , 615–624. doi: 10.1111/j.1475‐1313.2011.00859.x Abstract Purpose: Night driving is a complex visual task with important ramifications for driver and pedestrian safety. It usually performed under or scotopic conditions frequently, the presence of transient glare sources that can adapt parts central...

In this paper, we present a review of experimental work on Stark broadening singly ionized xenon lines. Eighty lines, from close UV to the red region spectrum, have been studied. halfwidths were compared with data literature and modified semi-empirical calculations. A pulsed arc 95% helium 5% was used as plasma source for study. Measured electron densities Ne temperatures T in ranges 0.2–1.6 × 10 23 m −3 18 300–25 500 K, respectively.

This work reports Stark shifts and widths of 15 Ar I lines measured in a pulsed arc. Plasma parameters, electron density temperature, range this experiment from 0.25 to 13 500 26 K, respectively. The former has been interferometrically at single wavelength spectroscopically the -Stark broadening. latter Boltzmann plot II ratio line intensities. Comparisons with most data published date about topic are also included.

This work reports an extensive collection of 108 transition probabilities NII lines in the visible spectral region, all them measured emission experiment.Relative intensity measurements have been made on a pulsed discharge lamp and absolute A ki values obtained by using literature available data.Electron density temperature range this experiment from 0.2 to 1.1 10 23 m -3 17000 29000 K respectively.The first one has simultaneously determined two-wavelength interferometry Stark broadening HeI...

To determine the influence of surround luminance on letter contrast sensitivity function.The binocular sensitivities 31 young and ocularly healthy individuals were measured with letters sizes calculated to obtain targeted fundamental frequencies 3, 10, 20, 30 c deg(-1), respectively; luminances from 1 1000 cd m(-2), always a test chart background 200 m(-2).The increased up 100 m(-2) decreased when m(-2). These increments are larger for higher spatial frequencies, while decrements similar all...

Seamounts constitute an obstacle to the ocean circulation, modifying it. As a result, variety of hydrodynamical processes and phenomena may take place over seamounts, among others, flow intensification, current deflection, upwelling, Taylor caps, internal waves. These oceanographic effects turn seamounts into very productive ecosystems with high species diversity, in some cases, are densely populated by benthic organisms, such corals, gorgonians, sponges. In this study, we describe...

This work reports a collection of 200 Ar II transition probabilities lines in the spectral region 360 - 750 nm for 16 lifetime values, all them measured an emission experiment. Relative intensity measurements have been made on pulsed discharge lamp and absolute values obtained by using data taken from literature. The electron density, which ranges 0.2 to plasma, has determined simultaneously interferometry -Stark broadening. excitation temperature (15 000 27 K) calculated new method also...

A set of experimental Stark width and shift parameters visible singly ionized silicon spectral lines is reported in this paper. Measurements have been made on a pulsed plasma generated linear discharge lamp filled with mixture silane helium. Electron density temperature range from 0.2 to 0.9 × 1023 m−3 16 000 20 K respectively. has simultaneously determined by two-wavelength interferometry broadening He I 501.6 nm, 728.1 nm Hα lines. Temperature Boltzmann plot lines, absolute emission Si II...

<i>Aims. <i/>The aim of this work is to provide Stark parameters low intensity Xe II and III spectral lines from which scarce or null previous information exist.This completes the measurements ionized Xenon developed in last few years extends database for astrophysical applications.<i>Methods. <i/>All were measured a pulsed arc plasma with 95% helium 5% xenon. Measured electron densities temperatures range (0.2-1.7)10<sup>23<sup/> m<sup>-3<sup/> 18 000-25 500 K, respectively.<i>Results....

This paper presents the results of an experimental study Stark broadening and a shift some double-ionized argon spectral lines in plasma low-pressure-pulsed arc. Electron densities (3.5–9.0) × 1022 m−3 are determined by two-wavelength interferometry method electron temperatures 16 000–24 000 K from Boltzmann plot 13 Ar ii lines. The parameter obtained analysed compared with available other authors as well calculated values modified semi-empirical formulae. All investigated belong to...

This work reports information about Stark broadening and shift parameters of a very extensive collection visible singly ionized nitrogen lines. All them were measured in linear discharge lamp from mixture helium. Electron density temperature range this experiment 0.2 to 1.1 × 1023m-3and 17 000 29 K, respectively. The first one has been simultaneously determined two-wavelength interferometry the He I 471.3 nm, second Boltzmann plot N II lines II/N intensity ratios. Dependences these with...

Intensified charge-coupled devices (ICCD) are used in a great variety of spectroscopic applications, some them requiring high sensitivity and spectral resolution. The setup, configuration, featuring these cameras fundamental issues order to acquire quality spectra. In this work critical assessment detectors is performed the specific optical alignment, featuring, dark shot noise described analyzed. Spatial response detector usually shows significant lack spatial homogeneity map interferences...

Transition probabilities have a significant interest in the astrophysical field. The aim of this experiment is to extend present data base measured Ar ii transition ultraviolet (UV) region and improve quality some already existing data. Despite all efforts made assemble an accurate set (Aki), recommended by National Institute Standards Technology (NIST) for spectral lines UV uncertainties around 50 per cent. We relative intensities emitted from low-pressure-pulsed discharge lamp which...

Stark-broadening parameters (width and shift) of the 728.1-nm helium neutral line (2${\mathit{p}}^{1}$${\mathit{P}}^{0}$-3${\mathit{s}}^{1}$S) have been measured in a pulsed arc plasma. The is well isolated with enough intensity to be considered very convenient calibration line. Electron density, which was obtained by interferometry two wavelengths, ranges from 1.50\ifmmode\times\else\texttimes\fi{}${10}^{22}$ ${\mathrm{m}}^{\mathrm{\ensuremath{-}}3}$...

Measurements of the Stark-broadening parameters two \HeI lines with forbidden components, have been done in a pulsed arc plasma. Electron density, ranging from 1.50×10 22 to 1.45×10 23 m -3 , is obtained by interferometry wavelengths. Plasma temperature, determinated Boltzmann plots several \HeIlines, lies interval 16 000–25 000 K. A set four geometrical profile are and compared previous experimental theoretical results. The empirical formulae proposed this paper can be used plasma diagnostics.

This work reports measurements of nine Stark widths and shifts Xe II spectral lines. These line parameters have been measured in a pulsed arc plasma electron density temperature range (0.2–1.6) × 1023 m−3 (18 000–25 000) K, respectively. The results are compared to other experimental data as well with theoretical values calculated from modified semiempirical formulae. the lines belonging same multiplet usually very close. obtained this show that some cases clear intramultiplet irregularities...

In this paper, we present results of experimental determination Stark parameters Ar ii spectral lines. We report 126 half-width and 111 shift results, 53 half-widths 44 shifts which are presented here for the first time. The obtained data may be astrophysical interest. were compared with available other authors calculated ones in cases where it was possible. A low-pressure pulsed arc, filled pure argon, used as a plasma source. All measurements done under electron density ranges from 0.20 ×...

Stark widths and shifts of 25 visible singly ionized krypton lines are presented in this paper. All them were measured a pulsed discharge lamp from mixture helium. The electron density, which typically ranges 0.2 to 1.8×1023 m-3 has been simultaneously determined two-wavelength interferometry the broadening He I 388.865 nm. excitation temperature, 16 000 24 500 K, Boltzmann plot Kr II lines, allowed us recalculate some transition probabilities. Comparisons with most data published date about...

Lighting plays a major role in contrast sensitivity (CS) measurements. Both the test and surround illumination influence results although they are not usually considered clinical practice. The effects of luminance well known, but seems to be less investigated. This study aims evaluate differences CS measured with two configurations typical practice; analyse angular size target on pupil diameter for both luminances. An experimental arrangement was designed measure controlled surround....