Bibliothek

X
Sie haben 0 gespeicherte Treffer.
Markieren Sie die Treffer und klicken Sie auf "Zur Merkliste hinzufügen", um sie in dieser Liste zu speichern.
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
Datenquelle
Materialart
Erscheinungszeitraum
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Energy flow and excimer yields in continuous wave rare gas–halogen systems (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 88 (2000), S. 453-459 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: A stable, continuous wave (cw), electron beam at 14 keV has been used to study energy flow, reaction rates, and radiative decay in rare gas plus halogen systems at high pressure. Steady state solutions to rate equations were used to isolate parameters which affect both the transient and steady state yield of 193 nm radiation from ArF* and 157 nm radiation from F2*. The scaling of pumping power density to the inverse 4.25 power and cube of the pressure allowed a wide range of reaction times, from nanoseconds to seconds, to be considered. The spectra and yields as a function of partial pressures were used to obtain energy transfer efficiencies near 10% for 193 nm in a Ne:Ar:F2,1:0.008:0.0004 mixture and near 5% for 157 nm in a Ne:F2,1:0.002 mixture at 2–3 bar pressure. Scaling to high brightness lamps and near cw lasers is possible. © 2000 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.373680
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    Vacuum ultraviolet rare gas excimer light source (1997)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 68 (1997), S. 1360-1364 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: A dc electron beam at 20 keV is used for the excitation of pure rare gases at pressures up to 1.7 bar. The well known second excimer continua of argon, krypton, and xenon observed under these excitation conditions provide an efficient light source in the vacuum ultraviolet spectral region between 120 and 200 nm. Thin (300 nm) SiNx foils are used as entrance windows for the low energy electron beam. Due to the flexibility of the production process of the thin foils one can consider various shapes and sizes of the light emitting region to be manufactured. Efficiencies of ∼30% are observed for the conversion of electron beam energy into light. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1147942
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Optogalvanic signals from argon metastables in a rf glow discharge (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 792-794 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Laser optogalvanic (LOG) signals at 667.7, 751.5, and 696.5 nm from the 3 P1 and 3 P2 levels of Ar were studied at a pressure of 250 mTorr in a rf glow discharge. Signals with unexpected signs and time dependences were found. The results are interpreted as being due to radiative trapping effects and collisional mixing between resonance and metastable levels. An average electron energy of 2.1 eV is derived from modeling the data.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.100848
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 4
    Digitale Medien
    Digitale Medien
    Heavy-ion excitation of rare-gas excimers (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 62 (1987), S. 357-361 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Beams of high-energy heavy ions (Ar and U) from the UNILAC accelerator have been used to excite rare gases at pressures near 1 bar. The dominant spectroscopic feature observed in Ar, Kr, and Xe gases was molecular excimer emission at the second excimer continuum at 130, 150, and 170 nm, respectively. The excimer radiation was studied as a function of time (with respect to the excitation pulse), ion-beam current, pressure, and excitation density. The efficiency of excimer production from heavy-ion-beam energy was found to be several percent. Details of spectral shape, especially the ratio of first-to-second continuum emission, were found to depend on pressure and exciting beam type.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.339804
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 5
    Digitale Medien
    Digitale Medien
    Applications of Lasers to Nuclear Physics (1979)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Nuclear and Particle Science 29 (1979), S. 411-452 
    Details
    ISSN: 0163-8998
    Quelle: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1146/annurev.ns.29.120179.002211
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 6
    Digitale Medien
    Digitale Medien
    Isotope selective laser enhancement of the Li+H2 reaction (1987)
    Springer
    Applied physics 43 (1987), S. 247-251 
    Details
    ISSN: 1432-0649
    Schlagwort(e): 28.60 ; 82.50
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The enhancement of the Li+H2→LiH+H reaction due to laser excitation of the Li atom to the2p state has been investigated using absorption techniques. Using a rate equation model we obtain from our data a reaction cross-section σ[Li(2p)+H2→LiH+H]=(0.10±0.03)Å2 at 515°C. By selectively exciting one Li isotope the reaction is made isotope selective, suggesting an efficient means of isotope separation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00692495
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 7
    Digitale Medien
    Digitale Medien
    Laser production of polarized beams and targets (1985)
    Springer
    Hyperfine interactions 24 (1985), S. 143-157 
    Details
    ISSN: 1572-9540
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Hyperfine interaction techniques have historically been applied to produce polarized nuclei. The use of optical pumping with tunable lasers is a new hyperfine interaction method which dramatically extends the range of nuclear species which can be polarized, as well as the fluxes and densities which can be achieved and the temperature range in which experiments can be carried out. Lasers are ideally suided for the production of polarized atomic beams, as will be illustrated for the cases of6,7Li,23Na and3He. Techniques for polarizing dense atomic vapors will be described with an emphasis on achieving full Doppler coverage by the method of velocity changing collisions. Experiments leading to the production of a6Li target for a parity non-conservation study of the nuclear reaction6Li(α,γ)10B will be reviewed and results obtained to date presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02354809
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 8
    Digitale Medien
    Digitale Medien
    Laser applications in nuclear physics: Present and future (1985)
    Springer
    Hyperfine interactions 24 (1985), S. 1-17 
    Details
    ISSN: 1572-9540
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The use of lasers for nuclear physics research is widespread and growing rapidly. The major impact in nuclear structure research has come from nuclear size and shape determinations for nuclei far from stability via high resolution isotope shift measurements. In addition, systematic data on nuclear magnetic and quadrupole moments have been obtained via the hyperfine splitting resolved in laser fluorescence studies of atomic spectra in both stable and unstable systems. The tunability, high intensity and inherent polarization of laser light can be used to polarize atomic nuclei for nuclear reaction studies. The rapid efficient polarization of unstable nuclei with lasers also presents opportunities for new research in nuclear physics. In this paper the physics of the laser interaction for the studies indicated will be introduced. Some examples of work completed and in progress will be presented primarily from on-line laser studies at charged particle accelerators. Extensions of current research, particularly with respect to possible studies of short-lived nuclei, are discussed and the synergistic effects of certain advances in quantum electronics and nuclear physics described.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02354802
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 9
    Digitale Medien
    Digitale Medien
    Sub-doppler resolution laser-induced nuclear orientation of85mRb (t 1/2=1.0 μs) (1990)
    Springer
    Hyperfine interactions 59 (1990), S. 157-160 
    Details
    ISSN: 1572-9540
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02401213
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 10
    Digitale Medien
    Digitale Medien
    Optical gain on the 476.5 nm Argon-ion laser line in a gas-target excited by a heavy ion beam (1991)
    Springer
    The European physical journal 341 (1991), S. 111-115 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 42.55.Hq ; 52.20.Hv
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Optical gain on the 476.5 nm Ar II 4p−4s ion laser transition has been observed in argon-gas excited by 2.5 ns pulses of 90 MeV32S ions with a repetition rate of 4883 Hz. The energy per pulse was 23 μJ. The projectiles were stopped in the target at pressures between 5 and 20 kPa. Gain was determined from a measured transient increase of the intensity of a 476.5 nm probe laser beam sent along the ion beam axis and back reflected by an aluminum foil. The maximum gain observed was (0.4±0.1)×10−3 at a target-gas pressure of 5 kPa. Control experiments using krypton as target-gas were performed and yielded a null result. The optical gain observed in argon is consistent with the result from an analysis of spectroscopic studies of rare-gas targets excited by heavy ion beams.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01281282
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...