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Tuesday, July 21, 2020 | History

2 edition of Effects of gases on photoionization of caesium by line absorption found in the catalog.

Effects of gases on photoionization of caesium by line absorption

Fred Loomis Mohler

Effects of gases on photoionization of caesium by line absorption

by Fred Loomis Mohler

  • 116 Want to read
  • 27 Currently reading

Published by U. S. Govt. print. off. in Washington .
Written in English

    Subjects:
  • Ionization of gases,
  • Cesium,
  • Absorption spectra

  • Edition Notes

    With : Absorption measurements of the X ray general radiation, 1930 -- Apparatus for the determination aboard ship of the salinity of sea water by the electrical conductivity method, 1930 -- Efficiency of production of X-rays / by Warren W. Nicholas, 1930. Bound together subsequent to publication.

    Other titlesPhotoionization of caesium.
    Statementby F. L. Mohler and C. Boeckner.
    ContributionsBoeckner, Carl, [from old catalog] joint author.
    Classifications
    LC ClassificationsQC1 .U52 v. 5, no. 2
    The Physical Object
    Paginationp. 399-410 incl. tables, diagrs. ;
    Number of Pages410
    ID Numbers
    Open LibraryOL23870334M
    LC Control Number30026877

    DOAS is a method to determine concentrations of trace gases by measuring their specific narrow band absorption structures in the UV and visible spectral region [Platt and Perner, ; Platt, ]. A typical DOAS instrument consists of a continuous light source, i.e. a Xe-arc lamp, and an optical setup to send and receive the light through the. The atmospheric absorption amounts to about 67 W m-2, averaged over the surface of the planet, out of a TOA incident solar amount of W m 2. Of this, 38 Wm-2 is caused by NIR water vapor absorption, 15 Wm-2 is by O3 in the visible and ultraviolet, 12 Wm-2 .

    GASES IN THE ATMOSPHERE ABSORB RADIATION Gases can absorb and give off radiation The greenhouse effect keeps Earth warm There are different forms of radiation that humans can't see: Waves of ultraviolet radiation: have more energy than the light you can see. Can cause sunburn. Emission vs. Absorption 3 , 9/10/96 PM Emission vs. Absorption All modern Perkin-Elmer atomic absorption instruments are capable of measuring both atomic absorption and atomic emission. It is important for the operator to understand the processes that occur in each Size: 1MB.

    Other articles where Photoelectric absorption is discussed: radiation measurement: Photoelectric absorption: In this process, the incident X-ray or gamma-ray photon interacts with an atom of the absorbing material, and the photon completely disappears; its energy is transferred to one of the orbital electrons of the atom. Because this energy in general far exceeds the. Start studying Gases in the Atmosphere Absorb Radiation/Human Activities Affect the Atmosphere. Learn vocabulary, terms, and more with flashcards, games, and other study tools.


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Effects of gases on photoionization of caesium by line absorption by Fred Loomis Mohler Download PDF EPUB FB2

RP PHOTO-IONIZATIONOFCESIUMBYLINEABSORPTION er ABSTRACT Method.—Theionizationofcaesiumbylineabsorptionhasbeeninvestigated. Caesium is the softest element (it has a hardness of Mohs).

It is a very ductile, pale metal, which darkens in the presence of trace amounts of oxygen. When in the presence of mineral oil (where it is best kept during transport), it loses its metallic lustre and takes on a duller, grey appearance. It has a melting point of °C ( °F), making it one of the few elemental metals that Pronunciation: /ˈsiːziəm/ ​(SEE-zee-əm).

Caesium is a very reactive alcali metal of the first group of the table of elements. It was first discovered by Bunsen and Kirchhoff in using spectroscopic investigations.

It is characterized by one valence electron. The spectra show the saturated absoption of the D 2 line of Caesium at nm. The spectra are detected with a continuous. (line width), caused by either collisional (Lorentz) broad-ening or Doppler broadening, is also a function of temper-ature.

The temperature dependence of line absorption varies from line to line. On the other hand, water vapor continuum absorption, though still not fully understood on a funda-mental basis, is known to decrease with temperature File Size: KB. Particularly, ref.

6 deals with the use of photoionization in the direct electrical power generation (the caesium atomic and molecular photoionization cross section in the principal series wavelength range is evaluated and the corresponding ionization rates are compared in terms of the caesium vapour pressure for a solar radiant energy Cited by: 2.

The absorption cross section σ and the photoionization yield η (the probability that photon absorption produces ionization), are reported for C2H4 and C2D4 at 44 photon energies between and eV, and they are reported for n‐butane and n‐butane‐d10 at 37 photon energies between and eV.

For ethylene, the nature of the isotope effects on η, σ, and the Cited by: Laser absorption for quantification of caesium densities 3 with the features of the data analysis and the improvements achieved in comparison to the white light absorption technique.

Finally the paper presents in detail the adoption of the customized system to the ion source and reports on first successful measurements. Caesium absorption. I have made a re-determination of these lines from photographs of the absorption spectra for caesium vapour set free by the action of sodium and potassium on the chloride of caesium.

I have not been able to obtain metallic caesium, and the presence of the vapour of the other metals rather obscures the absorption lines due to the metal. In the case of caesium the fine structure splitting of the 7P3/2,1/2 levels is quite large and the collisional transfer of population between these levels by noble gases is known to be very small [10,12], and so the line broadening is almost entirely due to phase destroying collisions.

Vol number 4 OPTICS COMMUNICATIONS 15 March Cited by: 2. Infrared Radiation. Key properties of the atmosphere in the infrared spectrum ( m): Relatively opaque compared with solar.

Negligible scattering – consider emission and absorption. Key spectral regions. m CO2 and H2O absorption (mostly H2O). Add % La or Sr as chloride to both sample and calibration stds.

These effects are reduced in the hotter N2O/acetylene flame with addition of ionisation buffer % w/v potassium as chloride to all solns. Determination at the line however, is the magnesium ion line and requires no KCl buffer with the hotter flame. Manganese 25 Mn The alkali metals consist of the chemical elements lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr).

Together with hydrogen they comprise group 1, which lies in the s-block of the periodic alkali metals have their outermost electron in an s-orbital: this shared electron configuration results in their having very similar characteristic properties.

Absorption/Emission spectra of molecules show characteristic structures => molecules can be identified and quantified by these ‘fingerprints’ What determines these spectra?-position (wavelength) of absorption/emission line: difference of energy levels of the transition-strength of absorption/emission line: probability of the transitionFile Size: 2MB.

A photoionization aerosol time-of-flight mass spectrometer (ATOFMS) has been developed for on-line analysis of organic compounds in aerosol particles using tunable vacuum ultraviolet (VUV.

Two-temperature many component gas dynamic model is used for the analysis of features of radiative heat transfer in pulsed high pressure caesium discharge plasma. Abstract: The optical absorption spectra of CsI single crystals have been measured in a diamond anvil cell at pressures up to 60 GPa.

For the first ti'me, the fine struc- ture of the absorption edge of CsI has been observed at high pressures. The exciton effects are shown to be responsible. usually warms the materials that absorb it. Different gases in the atmosphere absorb these two different types of radiation.

The ozone layer protects life from harmful radiation. In Sectionyou read about a gas called ozone that forms in the stratosphere. An molecule (O 3) File Size: KB. THE BAKERIAN LECTURE.-On the Absorption and Radiation of IHeat by Gases and Vapours, and on the Physical Connexion of Radiation, Absorption, and Conduction.

By JOIIN TYNDALL, JEsq., F.R.S., MIember of the AcadeLmies and Societies of Holland, Geneva, Gittingen, Ziirich, Halle, Marburg, Breslau, la Societe Philomathlilue ofCited by: rare gases in the body of the enclosed lamp. The pressure in the helium lamp was torr and that in the neon lamp was torr.

In a recent detailed ex amination [9] of the output of a helium resonance lamp it was shown that at a helium pressure of to 2 torr the nm line. absorption: [ ab-sorp´shun ] 1. the act of taking up or in by specific chemical or molecular action; especially the passage of liquids or other substances through a surface of the body into body fluids and tissues, as in the absorption of the end products of digestion into the villi that line the intestine.

in psychology, devotion of. Abstract. High resolution relative photoionization cross sections are reported for a number of autoionizing states of atomic oxygen, including the metastable 3s'' 3 P 0, and 2s2p 5 3 P 0 states. The wavelength resolution of the present data ( Å, FWHM) is a factor of 4 better than that of the previously reported data, and is sufficient to allow observation of lifetime broadening for.Male albino rats weighing to g were used.

In the first experiment 3 groups were fed on either a K-deficient diet or a normal stock diet, the latter given at specific times or freely. The first and third groups were starved for 24 h before being given 5 µcCs by stomach tube. In a second experiment rats were fasted for 24 h and anaesthetised and Cs was injected into ligated Cited by: There is presently a two fold interest in the atomic absorption spectra of the lanthanide elements.

Since the absorption lines originate in the ground level, or in other low lying terms of the neutral atom or ion, many of the observed transitions should have lower energy levels in common.

The wavelengths of the absorption lines, therefore.