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  • 1975-1979  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    High resolution spectroscopy of prompt and metastable decaying levels in highly ionized argon, especially of the metastable3 P 2-state of Ar16+ and the4 P 5/2-state of Ar15+ (1978)
    Springer
    The European physical journal 285 (1978), S. 171-176 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Besides the prompt x-ray emission of Ar-ions, the metastable decay of the heliumlike3 P 2- and the lithiumlike4 P 5/2-levels of highly ionized Ar16+ and Ar15+ atoms has been observed in a foil-excited beam using a flat-crystal spectrometer. Due to the highx-ray energy resolution of the spectrometer the two3 P 2 →1 S 0 and4 P 5/2 →2 S 1/2 transitions could be resolved. The experiment yielded (3128 ±2) eV for the3P2 → and (3091 ± 2)eV for the4 P 5/2 →2 S 1/2 transition energy respectively. Using a time of flight technique the lifetimes of the3 P 2- and the4 P 5/2-states were determined to be (1.44 ±0.09)ns and (0.66 ± 0.05) ns.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01408743
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Measurement of the lifetime of the3 P 2 and4 P 5/2 states in Ar16+ and Ar15+ (1979)
    Springer
    The European physical journal 291 (1979), S. 15-22 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Promptly decaying levels in Li- and Be-like Ar could be identified in the delayed x-ray and electron spectrum in addition to the four known metastable (1s2s)1 S 0, (1s2s)3 S 1, (1s2p)3 P 2, and (1s2s2p)4 P 5/2 states in He- and Li-like systems. The states having lifetimes of about 10−14s still contribute to the spectrum observed 10−9s after the ions have passed a foil. This observation is explained by cascading processes from states of high principal quantum numbern≧14. The measured lifetime of the4 P 5/2 state subtracting the contribution of cascades is (0.594±0.016) ns and slightly larger than the theoretically predicted value of 0.563 ns. The3 P 2 state is depopulated at short distances behind the foil by cascading processes. Its measured lifetime of (1.44±0.08) ns compares to a theoretical value of 1.48 ns.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01415809
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Measurement of the population of the4 P 5/2-state in Ar15+ by cascading processes (1978)
    Springer
    The European physical journal 288 (1978), S. 29-33 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The population of the4 P 5/2-state in Ar15+-ions by cascading processes was measured. The corrected lifetime is (0.55±0.04) ns and is in very good agreement with the theoretical value of 0.56 ns. At a specific beam energy of 1.4 MeV/u the lifetime of the3 P 2-state of Ar16+ is not influenced by cascading processes and is (1.44±0.08) ns. The energies of the3 P 2 →1 S 0- and4 P 5/2 →2 S 1/2-transitions are (3127.2±0.5) and (3090.0±0.7) eV, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01408197
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    Paper (German National Licenses)
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