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  • 1
    Electronic Resource
    Electronic Resource
    The microbial hydroxylation of solanidine and the mass spectrometric studies of some hydroxylated solanidines
    Amsterdam : Elsevier
    Steroids 9 (1967), S. 553-565 
    Details
    ISSN: 0039-128X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0039-128X(67)90108-0
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  • 2
    Electronic Resource
    Electronic Resource
    Ionization by electron impact in an indirectly heated Penning source (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 151-154 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: ion-production mechanism in an indirectly heated Penning source has been studied at NIRS. Taking the number of primary electron passages between two cathodes into account, we calculated the effective electron current density, Ji ; it is the order of kA/cm2 for Ar, where the index "i'' is the charge state. In a pulsed arc condition of 2.6 A and 1300 V with a neutral atom density of 4×1013/cm3(cw), the calculated ionization times for Ar5+→Ar6+ and Ar6+→Ar7+ are 18 and 28 μs if their production process is step-by-step. These values agree well with the experimental value of 20 μs. Ji is proportional to the arc voltage and inversely proportional to the neutral-atom density N. The yield of multiply charged ions is in proportion to 1/Ni−2. This expression agrees well with the experimental results, which suggest that multiply charged ions are produced from Ar2+ through step-by-step ionization by primary electrons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347736
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  • 3
    Electronic Resource
    Electronic Resource
    Application of low-temperature ions in the nonequilibrium state plasma of a Penning source (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 7933-7935 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present the high-output properties during the early 100–200 μs of a pulsed Penning source. The peak intensity, I, is higher than that of a dc source by a factor of more than 10. This phenomenon is due to the long confinement time of ions, τ, at the rising of the plasma, since within such a short time the ion temperature, T, does not reach thermal equilibrium and is still low. These characteristics are expressed as I∝τ∝T−1/2. The ratio of T−1/2 before and after equilibrium has a maximum of 1/18.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347487
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  • 4
    Electronic Resource
    Electronic Resource
    Observation of continuum absorption spectra in far wings of the Yb resonance line broadened by He, Ne, Ar, Kr, Xe, and Yb (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 95 (1991), S. 8083-8088 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have determined reduced absorption coefficients in far wings of the Yb (6s2)1S0–(6s6p)1P1 line broadened by He, Ne, Ar, Kr, Xe, and Yb. We find a prominent blue-satellite peak for all perturbers and undulations between the satellite peak and the line center for Ne, Ar, Kr, and Xe. Analyzing the satellite band with the aid of the unified Franck–Condon method, we obtain the position and the height of the extremum on the difference potential-energy curves concerned. We have also observed collision-induced-dipole absorption bands associated with the transition (6s2)1S0–(6s5d)3D2 of atomic Yb for Ne, Ar, Kr, and Xe perturbers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.461815
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  • 5
    Electronic Resource
    Electronic Resource
    Observation of collision-induced-dipole absorption bands in strontium–rare-gas mixtures. II. Bands involving high-lying states (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 4499-4503 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have observed many collision-induced-dipole (CID) absorption bands arising from the transitions between quasimolecular ground and high-lying (n≤10) states in the strontium–rare-gas systems. For each absorption band, we have measured the energy shift of the absorption peak from the energy of the correlating atomic forbidden transition and the effective oscillator strength per unit perturber density fCID/Np. The shift is roughly proportional to the electron scattering length L0 for each rare-gas atom, whereas the fCID/Np is roughly proportional to L20. The shift decreases in general as the principal quantum number n increases, and increases as one goes from the s state to the d state, and to the degenerate manifold state with l≥3. These general features of the shift and fCID/Np are consistent with the predictions by a simple Fermi-potential model, suggesting the important role of the interaction between a Rydberg electron and a rare-gas atom in the CID absorption processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.456788
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  • 6
    Electronic Resource
    Electronic Resource
    Blue satellite structure of the Ba resonance line broadened by rare gases (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 97 (1992), S. 9492-9493 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.463277
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  • 7
    Electronic Resource
    Electronic Resource
    Observation of far-wing absorption bands of the Ba 6s2 1S0–5d6p 1P1 line broadened by rare gases (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 94 (1991), S. 1903-1906 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have determined reduced absorption coefficients on far wings of the Ba 6s2 1S0–5d6p 1P1 line broadened by He, Ne, Ar, Kr, and Xe. Using the unified Franck–Condon theory, we analyzed the blue satellite band observed for each of the He, Ne, and Ar perturbers and obtained the position and the height of the extremum of the difference potential-energy curve to be 6.5±1.5 A and 251±4 cm−1 for He, 7.6±2 A and 114±2 cm−1 for Ne, and 7.4±2 A and 70±2 cm−1 for Ar. We have also observed the collision-induced–dipole absorption bands associated with the Ba 6s2 1S0–6s7s 1S0 forbidden transition for all rare-gas perturbers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.460712
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  • 8
    Electronic Resource
    Electronic Resource
    Observation of collision-induced-dipole absorption bands in strontium–rare-gas mixtures. I. The 5s–4d bands (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 4495-4498 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Reduced absorption coefficients have been measured for the collision-induced-dipole (CID) absorption bands associated with the 5s–4d transition of atomic strontium perturbed by He, Ne, Ar, Kr, Xe, and Sr. The main CID absorption band, assigned to 5sΣ–4dΣ, extends from the position of the atomic 5s–4d transition towards the shorter-wavelength side for every perturber. For Xe and Kr, an additional small absorption band is seen at the foot of the atomic 5s–4d transition. The former 5sΣ–4dΣ band is interpreted to result from collisional mixing of the 5p state of atomic Sr into the molecular 4dΣ state for small internuclear separations, while the latter band is interpreted to result from the collisional quadrupole (strontium)–dipole (Xe or Kr) interaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.456787
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  • 9
    Electronic Resource
    Electronic Resource
    Observation of pair absorption and self-broadening in Ba vapor (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 94 (1991), S. 1907-1912 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Reduced absorption coefficients γBaBa were measured for the far-wing absorption of the self-broadened Ba6s2 1S0–5d6p 1P1 line, Ba(6s2 1S0) +Ba(6s2 1S0)+(h-dash-bar)ω → Ba*(5d6p 1P1)+Ba(6s21 S0)and the pair absorption Ba(6s2 1S0)+Ba(6s2 1 S0) +(h-dash-bar)ω→Ba*(6s6p 1P1 +Ba*(6s5d 1D2). The self-broadening shows the red-shaded asymmetric profile: γBaBa on the red wing is proportional to Δν−3/2, where Δν is the detuning from the line center. The pair absorption shows a broad asymmetric peak having a blue tail and a blue satellite. The estimated γBaBa, which is based on the quasistatic line-broadening theory and the long-range dipole–dipole interaction between the relevant atomic excited levels, shows reasonable agreement for the red wing of the self-absorption whereas it gives larger values by a factor of 3 for the blue tail of the main peak for the pair absorption.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.459911
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  • 10
    Electronic Resource
    Electronic Resource
    Large spontaneous spin splitting in gate-controlled two-dimensional electron gases at normal In0.75Ga0.25As/In0.75Al0.25As heterojunctions (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 89 (2001), S. 8017-8021 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Amounts of spontaneous spin splittings were estimated from low-temperature magnetoresistances in two-dimensional electron gases created at In0.75Ga0.25As/In0.75Al0.25As heterojunctions under a gate bias. Typical sheet electron densities and mobilities in the raw wafers were ∼1.0×1012/cm2 and 2–5×105 cm2/V s at 1.5 K, respectively. A maximum spin-orbit coupling constant αzero of ∼30(×10−12 eV m) was obtained for the van der Pauw sample. In gated Hall-bar samples, a decrease in the αzero value with decreasing gate voltage (Vg) was first confirmed in a normal heterojunction. The main origin for such a large αzero, which is a few times larger than any previously reported, was found to be a structure-dependent so-called interface contribution in the Rashba term. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1362356
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