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  • 1
    Electronic Resource
    Electronic Resource
    Molecular Orbital Studies of the Structures and Reactions of Singly Charged Magnesium Ion with Water Clusters, Mg+(H2O)n (1995)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 117 (1995), S. 755-763 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00107a019
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  • 2
    Electronic Resource
    Electronic Resource
    Thermal lensing study of singlet oxygen reactions (1983)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 105 (1983), S. 1091-1096 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00343a004
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  • 3
    Electronic Resource
    Electronic Resource
    The intramultiplet relaxation of Cd(5 3P2) by H2 and D2 (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 94 (1991), S. 7951-7957 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The deactivation processes of Cd(5 3P2) by H2 and D2 were studied by employing pulsed laser techniques. The cross sections for the intramultiplet relaxation to produce Cd(5 3P1) and Cd(5 3P0) were determined as follows: Cd(5 3P2)+H2→Cd(5 3P1)+H2; 6.3, Cd(5 3P2)+H2→Cd(5 3P0)+H2; 1.0, Cd(5 3P2)+D2→Cd(5 3P1)+D2; 4.4, Cd(5 3P2)+D2→Cd(5 3P0)+D2; 0.9, in units of 10−16 cm2 at 630 K. The cross sections for the overall deactivation of Cd(5 3P2) by H2 and D2 were determined to be 9.8×10−16 cm2 and 6.9×10−16 cm2, respectively. These values are compared with the calculated results based on a semiclassical curve crossing mechanism. It is suggested that electronic-to-rotational energy transfer without sharp resonances plays an important role in the deactivation of Cd(5 3P2).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.460129
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  • 4
    Electronic Resource
    Electronic Resource
    The intramultiplet mixing of Zn(43PJ) by collisions with 4He and 3He (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 4112-4116 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The intramultiplet mixing processes of Zn(43PJ ) by collisions with 4He and 3He were studied by employing pulsed laser techniques. The following cross sections were obtained: Zn(43P1)+4He→Zn(43P2)+4He: 3.1; Zn(43P1)+4He→Zn(43P0)+4He: 1.5; Zn(43P1)+3He→Zn(43P2)+3He: 4.7; Zn(43P1)+3He→Zn(43P0)+3He: 1.8; in units of 10−17 cm2. A quantum close-coupling calculation was carried out by assuming various interaction potentials. The cross sections for the production of Zn(43P2) from Zn(43P1) could be well reproduced by the calculation for both 4He and 3He. On the other hand, the calculated cross sections for the production of Zn(43P0) were found to be always smaller than the experimental ones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458743
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  • 5
    Electronic Resource
    Electronic Resource
    Electronic spectra and intramultiplet relaxation of jet-cooled Hg–CH4, –C2H6, –N2, and –CO complexes (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 4745-4753 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The electronic spectra of jet-cooled Hg–CH4, –C2H6, –N2, and –CO complexes in the vicinity of Hg 3P1−1S0 were studied by means of the LIF, two-color MPI, and Hg(3P0) pump-and-probe techniques. From the observed spectra, the A˜ and B˜ states of these complexes were characterized in analogy with those of Hg–rare gas complexes. These excited-state complexes were found to predissociate into the Hg (3P0) atom and the ground-state molecules. The intensity alternation of the predissociation rate with respect to the excitation of the bending vibration was newly observed for the CH4 and N2 complexes in addition to the rotational dependence of the rate. On the basis of these results and the fluorescence lifetimes, the mechanisms of the intramultiplet relaxation for these complexes were examined. It was concluded that, in the A˜ state, the bending vibration and the rotational motion of the whole system about the symmetry axis play the crucial role in the relaxation. The relaxation from the B˜ state was interpreted by the two-step process via the A˜ state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.452695
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  • 6
    Electronic Resource
    Electronic Resource
    Photodissociation dynamics of NH3: Rovibronic absorption analysis of the A˜–X˜ transition and nuclear spin polarization in the NH2 (X˜ 2B1) product (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 5238-5240 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The A˜–X˜ electronic spectra of jet-cooled NH3, obtained by probing the LIF of the NH2 (X˜ 2B1) fragments, are presented. The homogeneous linewidths for the v'2 =0 and v2 =1 vibrational bands are estimated as 32±2 and 30±2 cm−1, respectively. A partial analysis of the excitation energy dependence of the rotational energy distribution in NH2 (X˜ 2B1) is also examined. The results clearly show that the photodissociation of the A˜ state NH3 proceeds via a near planar structure in a nuclear spin conserved manner.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454599
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  • 7
    Electronic Resource
    Electronic Resource
    Nascent internal state distributions of ZnH(X 2Σ+) produced in the reactions of Zn(4 1P1) with some alkane hydrocarbons (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 4803-4808 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The reactions of Zn(4 1P1) with CH4, C2H6, C3H8, and C(CH3)4 were studied by employing a laser pump-and-probe technique. The nascent rotational and vibrational state distributions of ZnH(X 2Σ+) were determined. These distributions were compared with those predicted by statistical models. The distributions for C(CH3)4 resembled to the statistical ones, while those for simple alkanes such as CH4 were a little hotter than the statistical ones. These results suggest that the reaction proceeds via a relatively long-lived insertive complex. There was no great difference in the production yields of ZnH, although that for CH4 was the largest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.467402
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  • 8
    Electronic Resource
    Electronic Resource
    Photoionization studies of germanium and tin clusters in the energy region of 5.0–8.8 eV: Ionization potentials for Gen (n=2–57) and Snn (n=2–41) (1999)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 111 (1999), S. 3880-3890 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Photoionization thresholds for Gen (n≤57) and Snn (n≤41) are examined by laser photoionization with detection by reflectron time-of-flight mass spectrometry. Stimulated Raman anti-Stokes scattering of narrow bandwidth 193, 248, and 266 nm radiation is used to produce ionization light sources in the vacuum ultraviolet region (200–141 nm). A very similar size dependence of the ionization potentials (IPs) is found for germanium and tin clusters with fewer than 12 atoms, featuring a major maximum at n=10. The rather high IP of Ge10 compared with its neighbors is consistent with the results of a photodissociation study of Gen+. We also find a rapid decrease in the IPs for Gen between n=15 and 26, which is very similar to that for silicon clusters reported in our previous paper. On the other hand, the IPs of medium size Snn (n=15–41) clusters are found to decrease slowly without such a gap. The remarkable difference in the size dependence of the IPs for the Sin, Gen, and Snn clusters is discussed in relation to the existence of a structural transition in the medium-size Sin and Gen clusters. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.479691
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  • 9
    Electronic Resource
    Electronic Resource
    Electronic spectrum of Hg(3P0)–Ar complex in a supersonic jet (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 1696-1697 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The a˜ excited state of HgAr, which correlates asymptotically with Hg (3P0)+Ar(1S0), was examined for the first time under supersonic jet conditions. Laser double resonance experiments on the a˜–c˜, a˜–D˜, and A˜–C˜ transitions of the complex have revealed the potential energy curve of this hitherto unknown state. The state was found to have a double minimum potential; D0=97 and ∼16 cm−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451213
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  • 10
    Electronic Resource
    Electronic Resource
    Photodissociation study on Ca+(H2O)n, n=1–6: Electron structure and photoinduced dehydrogenation reaction (1996)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 104 (1996), S. 9768-9778 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The photodissociation spectra of size-selected Ca+(H2O)n (n=1–6) ions are examined in the wavelength region from 330 to 1440 nm by monitoring the total yield of the fragment ions. The absorption bands exhibit redshifts as large as ∼16 000 cm−1 with respect to the 2P–2S resonance line of the free Ca+ ion and are explained by the shift of this transition as a result of hydration. The converging trend in the spectral shifts at n∼6 is discussed in relation to the filling of the first solvation shell for Ca+ undergoing the sdσ hybridization. We also discuss the possible contribution of charge-transfer character in the observed transitions in conjunction with our recent results on the photoelectron spectra of Na−(NH3)n. The mass spectra of the fragment ions show the existence of two dissociation channels: The evaporation of water molecules and the dehydrogenation reaction to produce the hydrated CaOH+ ions. The evaporation process is the dominant decay channel for n=1, while the reaction is the only one for n≥3. The former process is found to take place from the higher vibrational levels in the ground state being populated through the fast internal conversion induced by the presence of the low-lying 2D-type states. As for n=1, the reaction takes place only in an excited state which has the Ca+p orbital aligned on the intermolecular axis. The state-specific reaction for n=1 is explained in terms of charge-transfer interaction between the Ca+ ion and the water molecule. On the other hand, the reactivity for the larger clusters drastically increases with increasing cluster size. These reaction features are discussed in comparison with those for Mg+(H2O)n reported previously. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.471738
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