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  • 1
    Monograph available for loan
    Monograph available for loan
    Geodätisch-glaziologische Arbeiten am Hays-Gletscher, Enderby-Land, während der 17. Sowjetischen Antarktisexpedition 1972 (1976)
    Berlin : Nationalkomitee für Geodäsie und Geophysik der Deutschen Demokratischen Republik
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    Call number: Q 2435/37 ; ZSP-319/C-37 ; MOP Per 581(3/37)
    In: Geodätische und Geophysikalische Veröffentlichungen : Reihe 3, Physik der festen Erde, Heft 37
    Type of Medium: Monograph available for loan
    Pages: 191 Seiten , Illustrationen, Karten , 1 Karte
    ISSN: 0435-6187
    Series Statement: Geodätische und Geophysikalische Veröffentlichungen : Reihe 3, Physik der festen Erde 37
    Language: German , English , Russian
    Note: Kartenbeilage unter dem Titel: Berge der Deutsch-Sowjetischen Freundschaft : Antarktika Enderby-Land = Gory Nemecko-Sovetskoj Družby : Antarktika Zemlja Ėnderbi 〈1 : 10 000〉 , Inhaltsverzeichnis Vorwort Rezjume Abstract Teil I: Allgemeiner Teil 1. Arbeitsprogramm und Arbeitsgebiet (S. MEIER) 1.1. Arbeitsprogramm 1.2. Meßmethoden 1.3. Hauptarbeitsgebiet Hays-Gletscher 1.4. Lokale Eiskappe von Molodežnaja 1.5. Vergleichsobjekt Campbell-Gletscher 2. Expeditionsverlauf (K. DRESZLER) 3. Ausrüstung (K. DRESZLER) 4. Klimatische Bedingungen (K. DRESZLER) Teil II: Meßverfahren und -ergebnisse 1. Geodätische und kartographische Grundlagen 1.1. Festpunkte (R. EGER) 1.2. Kartenunterlagen (K. DRESZLER) 2. Geodätisch-glaziologische Traverse 2.1. Erkundung und Signalisierung (S. MEIER} 2.1.1. Verlauf der Traverse 2.1.2. Erkundung, Punktabstand 2.1.3. Signalisierung 2.2. Lagemessung und trigonometrische Höhenübertragung 2.2.1. Streckenmessung 2.2.2. Winkelmessung 2.2.3. Technologischer Ablauf 2.2.4. Auswertung der Messungsergebnisse 2.3. Astronomische Beobachtungen (R. DIETRICH) 2.4. Deformationsraten (S. MEIER) 2.5. Barometrisches Höhenprofil (R. DIETRICH) 2.5.1. Zielstellung 2.5.2. Das Meßverfahren 2.5.3. Diskussion der Fehlereinflüsse 2.5.3.1. Fehler im angenommenen theoretischen Modell 2.5.3.2. Fehler bei der praktischen Messung 2.5.4. Ergebnisse 2.6. Oberflächenneigungen (S. MEIER) 2.7. Photogrammetrische Geländeaufnahmen (K. DRESZLER) 2.7.1. Zunge des Hays-Gletschers 2.7. 2. Einzugsgebiet des Hays-Gletschers 2.8. Glaziologische Arbeiten (S. MEIER) 2.8.1. Ziel der Feldarbeiten 2.8.2. Pegelablesungen 2.8.3. Überblick über Firnaufgrabungen. Firnschichtung 2.8.4. Dichtemessungen 2.8.5. Firntemperaturmessungen 2.8.6. Akkumulationsraten und -profile 2.8.7. Oberflächenbeobachtungen 3. Bewegungsmessungen am Hays- und Campbell-Gletscher 3.1. Photogrammetrjsche Bewegungsmessungen am Hays- und Campbell-Gletscher (K. DRESZLER) 3.2. Auswertung photogrammetrischer Bewegungsmessungen (S. MEIER) 3.2.1. Auswerteziel 3.2.2. Auswertefolge 3.2.3. Besonderheiten 3.2.4. Ergebnisse 3.2.5. Meßfehler 3.3. Trigonometrische Bewegungsmessungen am Campbell-Gletscher (R. EGER) 4. Eisdickenmessungen und Meereslotungen 4.1. Ergebnisse von Radarsondierungen (Messung V. I. CUDAKOV) G. W. TREPOV, Bearbeitung S. MEIER) 4.2. Ergebnisse von Gravimetermessungen (Messung N.D. TRETJAKOV, Bearbeitung C. OELSRER) 4.3. Drahtlotung Spooner-Bucht (S. MEIER) 5. Sonderarbeiten 5.1. Results of meteorological Observations at Camp Abendberg and during the oversnow traverses (E. KAUP) 5.1.1. Meteorological observations at Camp Abendberg 5.1.2. Meteorological Observations during the oversnow traverses 5.2. Küstennahe Ablation und temperierte Firnschicht (S. MEIER) 5.3. Analyse der Sedimentprobe vom Boden der Spooner-Bucht (J. ELIDBERG, F. FALK) 5.4. Refraktionsbeobachtungen (R. EGER) 5.4.1. Beobachtungsprogramm 5.4.2. Beobachtungsergebnisse 5.5. Untersuchungen zur barometrischen Höhenbestimmung von Einzelpunkten (R. DIETRICH) 5.5.1. Einführung 5.5.2. Beobachtungsverfahren und -geräte 5.5.3. Auswertungsmethode 5.5.4. Ergebnisse 5.5.5. Zusammenfassung und Schlußfolgerungen 5.6. Topographische Aufnahme der Berge der Deutsch-Sowjetischen Freundschaft (K. DRESZLER) 5.6.1. Allgemeine Beschreibung 5.6.2. Topographische Aufnahme 5.6.3. Photogrammetrische Auswertung 5.6.4. Kartographische Arbeiten (H. BRUNNER) 5.6.5. Ergebnis Teil IIIa Glaziologische Ergebnisse der Feldarbeiten (S. MEIER) 1. Topographie und Orographie 1.1. Topographie der Eisoberfläche 1.2. Topographie des Felsuntergrundes. Eisdicken 1.3. Abflußgebiete. Gletschergrenzen 1.4. Frontlagen und -höhen 2. Eisbewegung und Deformation 2.1. Frühere Beobachtungen am Hays- und Campbell-Gletscher 2.2. Geschwindigkeitsfeld Hays-Gletscher 2.3. Querkontraktion und Längsdilatation 2.4. Zeitliche Bewegungsschwankungen 2.5. Bewegung der schwimmenden Zunge und Kalbungsrhythmus 2.6. Geschwindigkeit und Kalbungsrhythmus des Campbell-Gletschers 3. Eigenschaften des Oberflächenfirns 3.1. Temperaturen und Temperaturgradienten 3.2. Dichte, Härte, Schichtung 3.3. Vorherrschende Winde und Schneedrift 4. Komponenten des Massenhaushalts 4.1. Schneeakkumulation 1972 4.2. Schneeablation 1972/73 4.3. Eisausstoß 5. Zusammenfassung und Schlußfolgerungen Literatur Anlagen Kartenbeilage , Zusammenfassung in russischer Sprache , Text teilweise in kyrillischer Schrift , Beiträge teilweise in deutscher, teilweise in englischer Sprache
    Location: Upper compact magazine
    Location: AWI Archive
    Location: MOP - must be ordered
    Branch Library: GFZ Library
    Branch Library: AWI Library
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    Nonadiabatic coupling between the EF+GK+H 1Σ+g, I 1Πg, and J 1Δg states of the hydrogen molecule. Calculation of rovibronic structures in H2, HD, and D2 (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 92 (1990), S. 7461-7478 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The Born–Oppenheimer potential curves of the first two excited 1Σ+g states of H2, EF and GK, exhibit double minima which arise from avoided crossings between the electronic energy curves of the doubly excited 1σ2u configuration and of the 1Σ+g Rydberg states of the 1σg2sσg and 1σg3dσg configurations. The vibrational structures of the adiabatic electronic states are mutually coupled via strongly R-dependent off-diagonal electronic matrix elements of the d/dR and d2/dR2 operators. Furthermore the rotational structures are characterized by strong angular coupling within the complex of 3d-singlet-gerade states G 1Σ+g, I 1Πg, and J 1Δg.We have evaluated the nonadiabatic coupling functions involving the first three excited 1Σ+g states EF, GK, and H, and the I 1Πg and J 1Δg states, and have calculated their nonadiabatic rovibronic structures for the J=0–5 levels of H2, HD, and D2 up to the H(1s)+H(2s,2p) dissociation limit. The simultaneous radial and angular couplings within these five electronic states have been treated using ab initio potential curves, adiabatic corrections, and nonadiabatic coupling functions. The coupled equations have been transformed into a diabatic electronic basis and solved numerically, and the resulting eigenfunctions have been transformed back into the adiabatic basis. Energy eigenvalues, nonadiabatic energy shifts, B values, Landé g factors, band transition moments, Einstein coefficients, and radiative lifetimes have been evaluated and compared with spectroscopic results where possible. The discrepancies between observed and calculated rovibronic term values depend systematically on electronic state, vibrational energy, and isotopic mass, and their magnitudes indicate that the absolute energy errors of the ab initio potential curves amount to less than 1 cm−1 near the minima of the EF 1Σ+g and I 1Πg states, approximately 2 cm−1 in the J 1Δg state, and 5 cm−1 in the H 1Σ+g state. The nonadiabatic ab initio results have already aided spectroscopic identifications of new energy levels and they indicate that several old assignments must be discarded.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458181
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  • 3
    Electronic Resource
    Electronic Resource
    The B 1Σ+u, B' 1Σ+u,C 1Πu, and D 1Πu states of hydrogen. Ab initio calculation of rovibronic coupling in H2, HD, and D2 (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 7401-7427 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The nonadiabatic rovibronic structures of the B, B', C, and D states of H2, HD, and D2 have been calculated up to the common dissociation limit of the first three of these electronic states using the ab initio adiabatic potential curves and nonadiabatic coupling functions published recently by Wolniewicz and one of us. The homogeneous (Σ+–Σ+ and Π–Π) and heterogeneous (Σ+–Π+) interactions are treated simultaneously by numerical solution of the coupled vibrational equations for each J value from J=0 to J=6. The calculated nonadiabatic energy shifts, which show strong v- and J-dependent variations within each electronic state and which spread over approximately ±50 cm−1 for J=6 in H2, yield rovibronic structures in very good agreement with spectroscopic term values. A number of published spectroscopic assignments, including states close to the dissociation limit, must be reevaluated in the light of this calculation. The remaining energy errors are nuclear-mass dependent and are attributed to the neglected nonadiabatic interactions with the higher members of the 1Σ+u and 1Πu Rydberg series. The convergence errors of the Born–Oppenheimer energies of all four electronic states treated here appear to be at most 2 cm−1 for the highest bound vibrational states and less than 1 cm−1 for the lowest ones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455271
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  • 4
    Electronic Resource
    Electronic Resource
    Weak predissociation of the EF, GK, and H 1Σ+g states of the H2 molecule by nonadiabatic coupling with the electronic ground state (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 4958-4964 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The energy shifts and widths generated in the vibrational levels of the EF, GK, and H 1Σ+g states of H2 by their nonadiabatic interactions with the electronic ground state have been calculated using ab initio wave functions. The shifts of the 44 quasibound vibronic levels of these excited states range from +0.02 to +1.00 cm−1. Along the EF progression the shifts are found to depend on vibrational kinetic energy in surprisingly good accord with the Van Vleck approximation. The calculated nonradiative decay probabilities range up to 3.3×106 s−1, and in one case the predissociation rate is as large as 39% of the radiative one. Experimental tests of these predictions are not yet available.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458633
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  • 5
    Electronic Resource
    Electronic Resource
    Vibrational relaxation in the A 3Σ+u state of N2 in rare gas matrices (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 3482-3491 
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    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The electron–beam excited A 3Σ+u–X 1Σ+g luminescence spectrum of N2 diluted in solid Ne, Ar, and Kr is investigated. The observed bands show a doublet structure, indicating that there are at least two distinct emitting sites of the N2 molecules in Ar and Kr matrices. For these matrices the population evolutions in the vibrationally excited A 3Σ+u states exhibit independent cascading decays within each band component for levels v'=3–6 while the populations of the lower levels v'=0–2 show temporal decays which can be attributed to the matrix-induced A 3Σ+u–X 1Σ+g radiation. For the Ne matrices long-living emission from the v'=0 and short-living and weak emission from the v'=1 and v'=2 levels are detected, respectively. The observed vibrational relaxation and its dependence on temperature and on impurities added to the solid is discussed on the basis of multiphonon-relaxation and energy–transfer models.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.452993
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  • 6
    Electronic Resource
    Electronic Resource
    Spectroscopic identification of rovibronic levels lying above the potential barrier of the EF 1Σ+g double-minimum state of the H2 molecule (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 6908-6914 
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    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Spectroscopic data on the higher vibrational levels of the EF 1Σ+g state of the H2 molecule are scarce. Here we report new identifications of energy levels with J=0–5 which fall into the range between vEF=9 and 20, i.e., the energy region above the potential barrier of the double-minimum EF potential curve. Some previously published line assignments and term values are hereby corrected. The results are mostly based on new assignments of EF 1Σ+g–B 1Σ+u bands in Dieke's hydrogen molecule wavelength tables published in 1972. The newly identified states are of interest in multiphoton spectroscopy and in comparisons of experimental properties with results of ab initio calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.453385
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  • 7
    Electronic Resource
    Electronic Resource
    The B 1Σ+u, B' 1Σ+u, C 1Πu, and D 1Πu states of the H2 molecule. Matrix elements of angular and radial nonadiabatic coupling and improved ab initio potential energy curves (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 3861-3870 
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    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The B, B', C, and D states of H2 are represented over wide ranges of the internuclear distance R by considerably more flexible electronic wave functions than the ones previously employed by Kolos, Rychlewski, and one of us (L.W.). These are used to compute the nonadiabatic coupling matrix elements for the homogeneous B'–B and D–C and the heterogeneous C–B, C–B', D–B, and D–B' interactions over a wide range of R values. The adiabatic potential curves obtained from the new electronic wave functions yield vibrational term values which, for the v=0 levels, lie within 0.6 to 2.2 cm−1 of the experimental ones in these four electronic states of H2. After subtracting the nuclear-mass-dependent contributions to these ab initio errors, which can be estimated by comparing H2 with D2, the remaining electronic errors near the equilibrium internuclear distances of these electronic states are approximately 0.3 cm−1 (C and D state) and 1 cm−1 (B and B' state). In the C, D, and B' states this represents improvements by 0.7, 6, and 8 cm−1, respectively, over the previous ab initio values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.453888
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  • 8
    Electronic Resource
    Electronic Resource
    Tunneling in the double-minimum EF 1Σ+g state of molecular hydrogen (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 1205-1211 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Motivated by the observations of tunneling resonances in the rotation–vibration structures of the EF 1Σ+g double-minimum states of H2 and D2 we calculate the resonant tunneling frequencies of these states with a semiclassical formula, using accurate ab initio potential functions with appropriate adiabatic and rotational corrections. Good agreement is obtained with the corresponding two-state interaction energies which describe these tunneling resonances and which are evaluated by fitting either the experimental term values or the accurate quantum mechanical energy eigenvalues of the double-minimum oscillator.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.453300
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  • 9
    Electronic Resource
    Electronic Resource
    Spectroscopic identification of the lowest rotation–vibration levels of the (2pσ)2 F 1Σ+g state of the D2 molecule (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 2384-2391 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The previously unobserved lowest vibrational levels of the F state of D2 are detected by the identification of F 1Σ+g–B 1Σ+u bands in infrared emission spectra of electric discharges recorded with a Fourier–transform spectrometer. The rotation–vibration structure of the F state, v=0–5, J=0–5, is in good agreement with accurate ab initio calculations which include the effects of tunneling in the double-minimum potential of the EF 1Σ+g state. For the v=J=0 levels of H2 and D2 the absolute energy error of the ab initio calculation extrapolates, for infinite nuclear mass, to an error of the electronic F state energy of +0.7±0.1 cm−1. This is consistent with Jungen's recent accurate spectroscopic determination of the ionization potentials of the excited states of H2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451093
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  • 10
    Electronic Resource
    Electronic Resource
    Electronic transition moments for the Lyman and Werner bands of the H2 molecule (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 4720-4721 
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    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We report new, more accurate ab initio values for the electronic transition moments of the B–X and C–X transitions of H2 in the internuclear distance range R=[1, 12 a.u.]. Most of the values published by Wolniewicz in 1969 are confirmed within 0.3% such that the resolution of a recently published discrepancy between experimental and theoretical B and C state lifetimes should be sought in the interpretation of the experimental measurements. (AIP)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.448684
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