Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1985-1989  (7)
Source
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Preferential population of magnetic sublevels of photodissociated atoms. I. Predissociation of Cs2 (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 1642-1650 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Preferential population of the magnetic sublevels of Cs(6p 2P3/2) atoms produced by predissociation of the C 1Πu state of the Cs2 molecule along the repulsive molecular state b 3Σ+u , has been found by observing the polarization of the atomic fluorescence Cs(6p 2Pm3/2→6s 2S1/2). By applying an external magnetic field, we have determined the population of the magnetic sublevels Cs(6p 2Pm3/2) directly from the intensities of the fluorescence lines Cs(6p 2Pm3/2 →6s 2Sm±11/2 ) split by the Zeeman effect. The results are analyzed theoretically by assuming the separability of electronic and nuclear motion for the dissociation along the repulsive potential curve. The effect of the external magnetic field on the photodissociation has been made clear, and the observed results could be fully explained on the basis of the adiabatic approximation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.448396
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Dynamics of Cs2 excited by a synchronously pumped mode-locked dye laser, and the effects of magnetic field (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 1987-1993 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: When the Cs2 molecule was excited by a dye-laser line of 15 841 cm−1, the fluorescence from the energy-transferred states as well as the resonance fluorescence fromthe optically excited levels, which were assigned to C 1Πu and d 3Πu, were observed. We measured the picosecond time-resolved fluorescence intensity by changing the vapor pressure and the temperature. The decay curves were analyzed by a least-squares curve fitting, and the lifetimes in the collisionless limit and the collision cross sections were determined. From the consideration of the rise and decay rates of fluorescence intensities, the kinetic pathways of the collisional energy transfer were estimated. The intensity of the fluorescence d 3Πu–X 1Σ+g was found to decrease appreciably in the presence of an external magnetic field. The magnetic field effect was estimated to be due to the predissociation induced by an electronic Zeeman interaction between the d 3Πu and c 3Σ+u states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.453172
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    A study of the D 1Σ+u–X 1Σ+g band system of Cs2 (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 1209-1214 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The transition lines to the low v' levels of the D 1Σ+u state are overlapped with the lines of the C 1Πu –X 1Σ+g transition. By choosing an appropriate wave number through a monochromator to observe a selected series of the D 1Σ+u (v',J±1)–X 1Σ+g (v‘,J) transition of Cs2, we measured the fluorescence intensity as a function of wave number of the laser line. 1237 spectral lines have been assigned to this band system of J'=4–108, v'=0–5. The Dunham coefficients of the D 1Σ+u state, which are useful to reproduce the measured line positions and also to construct a reasonable RKR potential curve, were determined by an iterative procedure. The molecular constants reproduced the observed 983 nonoverlapping line positions with a standard deviation of 0.0106 cm−1. The electronic term energy Te, the dissociation energy De, and the equilibrium internuclear distance Re of the D 1Σ+u state were determined to be 16 698.997 cm−1, 1547.6±0.8 cm−1, and 5.712 A(ring), respectively. The potential curves of the D 1Σ+u and C 1Πu states were estimated to cross at R=5.85 A(ring) and E=16 700 cm−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455171
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Perturbations of the A 1Σ+u and b 3Πu states of Na2 and the effects on the transition intensity and the line splitting (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 653-659 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Doppler-free polarization spectra of the A 1Σ+u (v=8, J=0–15) and b 3Π0u (v=14, J=0–15) states were observed. By analyzing the energy shifts, the spin–orbit interaction between the A 1Σ+u (v=8) and b 3Π0u (v=14) states was studied. The magnitudes of the hyperfine splittings were different in corresponding lines of the two states. In addition to the energy shifts, the line intensities and the line shapes were found to change remarkably near the perturbation. These are useful to study the mixing of the perturbing states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455240
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Doppler-free spectrum of the B 1Π–X 1Σ+ transition of NaK, and the perturbation and hyperfine splitting (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 7049-7055 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The Doppler-free high-resolution spectrum of the B 1 Π–X 1Σ+ transition of NaK was measured by the technique of laser polarization spectroscopy. The molecular constants of the B 1 Π state, which reproduced the observed 831 unperturbed line positions (v=0–6, J=1–94) with a standard deviation of 0.002 cm−1 , were determined. Many perturbed lines, which were attributed to the perturbation between the B 1 Π and c(2) 3 Σ+ states, were observed. By analyzing the energy shifts of the B 1 Π(v=4,J) levels around J=13, we estimated the rotational constant Bv of the c(2) 3 Σ+ state to be 0.048 cm−1, and the matrix element of the spin-orbit interaction 〈c(2) 3 Σ+ vN=JJM||Hso|| B 1Πv=4JM〉 to be 0.14 cm−1 . We found that the strongly perturbed lines split into four lines, and we identified them as a hyperfine splitting caused by a mixing of the c(2) 3 Σ+ state. The splitting into four lines is explained by the magnetic dipole interaction due to a nucleus of I=3/2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455334
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Hyperfine and Zeeman quantum beats of the Na(3 2P3/2–3 2S1/2) transition, and the decay of coherence (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 5238-5242 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Quantum beats of the Na(3 2P3/2–3 2S1/2) transition and their change with the magnetic field were observed in pure Na vapor and Na+He gas by using a picosecond laser system. The energies of the hyperfine and Zeeman sublevels of the 3 2P3/2 and 3 2S1/2 states were calculated by using the reported hyperfine constants and g factors, and the theoretical curve of the quantum beats was calculated. The results were in good agreement with the observed profile of the quantum beats in phase of modulation, but the difference of the amplitudes increased with time. By comparing the amplitude of the theoretical curve of the quantum beats with that of the experimental curve, we determined the relaxation time of coherence. The decay of amplitude of the modulation was found to become faster as the pressure of the foreign gas (He) was increased. The decay of amplitude, i.e., the decay of coherence arises from the dephasing, which occurs from the fluctuation of the level energies induced by the interatomic interaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.456477
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Hyperfine structure of the Na2 b 3Πu state (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 5124-5125 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The energy shifts and the hyperfine structures of the strongly perturbed levels between the A 1Σ+u (v=7) and b 3Π0u (v=13) states and between the A 1Σ+u (v=8) and b 3Π0u (v=14) states are studied. The hyperfine splitting of the Na2 b 3Πu state can be attributed predominantly to the Fermi contact interaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.457608
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...