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  • 1995-1999
  • 1990-1994  (4)
  • 1980-1984
  • 1991  (4)
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  • 1995-1999
  • 1990-1994  (4)
  • 1980-1984
Year
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  • 1
    Electronic Resource
    Electronic Resource
    Direct visual observation of powder dynamics in rf plasma-assisted deposition (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 59 (1991), S. 1409-1411 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Contamination due to particles generated and suspended in silane rf plasmas is investigated. Powder is rendered visible by illumination of the reactor volume. This simple diagnostic for global, spatio-temporal powder dynamics is used to study particle formation, trapping, and powder reduction by power modulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.105322
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Ion cyclotron wave excitation by double resonance coupling (1991)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 3 (1991), S. 1171-1181 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A modulated high frequency wave is used to remotely excite low frequency oscillations in a linear, strongly magnetized plasma column. An electromagnetic wave is launched as an extraordinary mode across the plasma by an external waveguide in the upper-hybrid frequency regime f≈fUH≈fce≈8 GHz, with P≤2 W. By frequency modulating (at fFM≈1–60 kHz, with fci(approximately-equal-to)30 kHz) the pump wave, the resonant layer is swept radially across the profile and perpendicularly to the field lines at f=fFM. The resulting radial oscillation of the electron linear and nonlinear pressure can be considered to act as a source term for the ion wave. A localized virtual antenna is thereby created inside the plasma. Measurements of the ion dielectric response (interferograms and perturbed distribution functions) via laser-induced fluorescence identify the two branches (forward, or ion-acoustic-like, and backward, or Bernstein, modes) of the electrostatic dispersion relation in the ion cyclotron frequency range. By changing the modulation bandwidth, and thus the spatial excursion of the oscillating resonant layer, a control on the perpendicular wavelength of the excited mode can be exerted. In particular, the possibility of selective excitation of the ion Bernstein wave is demonstrated experimentally.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859809
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Non-yrast level structure of121Xe via beta decay of121m+g Cs (1991)
    Springer
    The European physical journal 338 (1991), S. 405-415 
    Details
    ISSN: 1434-601X
    Keywords: 23.20.Lv ; 23-20.Nx ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The results of measurements of the gamma-ray and conversion-electron singles and coincidence spectra from the decay of the 122 s121m Cs and the 155 s121g Cs to levels of121Xe are reported. TheM 3 multipolarity of the 68.5 keV isomeric transition in121Cs has been deduced. Numerous low-lying levels below 1.6 MeV excitation energy are found. A negative-parity level at 355.9 keV is observed for the first time. The results supplement the low lying energy level systematics in odd-A xenons. A comparison is made with theN=67 barium isotone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01295768
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    β +-endpoint measurements near100Sn and146Gd (1991)
    Springer
    The European physical journal 340 (1991), S. 363-370 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Dr ; 23.40.−s ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract With a summation-free β+-endpoint spectrometer the β+-decay energies of104Sn,147Tb,148, 149Dy,149Ho,150Er, and151Tm were remeasured with improved accuracy. Combined with known proton and alpha decay energies, the resulting QEC values lead to atomic masses of very neutron-deficient isotopes including nuclei beyond the proton drip-line such as109I and113Cs. Furthermore, the Gamow-Tellerβ-strength of the even-even nuclei104Sn,148Dy, and150Er is reevaluated with reduced uncertainty.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290323
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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