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  • 1
    Electronic Resource
    Electronic Resource
    Molecular effects in light muonic atoms (1999)
    Springer
    Hyperfine interactions 119 (1999), S. 83-88 
    Details
    ISSN: 1572-9540
    Keywords: muonic atoms ; cascades ; molecular effects ; X-ray spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Muonic X-ray cascades in B, C, N, O and Ne following muonic atom formation in B2H6, CH4, C2H6, C4H10, N2, O2 and Ne were investigated. The densities of the different target gases were low enough to prevent any contact of the atom or molecule on which the formation takes place with surrounding atoms or molecules during the cascade. Molecular effects of the capturing molecule are clearly seen. The observed transition yields could be reproduced by variation of only two parameters in a cascade calculation: the number of initially available electrons and the muon angular momentum distribution at the starting point of the calculation. By varying the number of electrons, the molecular effects could be described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012658619364
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    High precision X-ray spectroscopy in hydrogen-like fermionic and bosonic atomic systems (1998)
    Springer
    Hyperfine interactions 114 (1998), S. 157-164 
    Details
    ISSN: 1572-9540
    Keywords: X-ray spectroscopy ; exotic atoms ; antiprotonic X-rays ; pion mass
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Some time after its formation an exotic atom may be considered a hydrogen-like system consisting of a nucleus and an exotic particle in a bound state. In this situation it is an ideal tool to study cascade properties, while for the innermost orbits it can be used to probe the interaction with the nucleus. From an extended series of experiments using high resolution X-ray spectroscopy for both aspects typical examples are reported and preliminary results are given: 1. To determine the complex scattering length in $${\bar p}$$ H the $${\text{3D}} \to 2{\text{P}} $$ hyperfine transitions have been measured. 2. To determine the pion mass the 5 $$\to $$ 4 transitions in $$\pi ^{14} $$ N have been studied. In all cases a major contribution to the uncertainty originates from the calibration. Therefore a new method is proposed that will establish a universal set of high precision calibration lines for pionic, muonic and electronic systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012674522206
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Absolute X-ray yields of light muonic atoms (1999)
    Springer
    Hyperfine interactions 119 (1999), S. 71-76 
    Details
    ISSN: 1572-9540
    Keywords: exotic atom ; cascade ; X-ray spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The intensities of X-rays from muonic atoms formed in low pressure Ne, O2, N2, He, and H2 gas was measured. For the pressure chosen external electron refilling can be neglected. Absolute yields were extracted and compared to results of cascade calculations. Knowledge of the yields of the circular X-ray transitions allows an in situ efficiency calibration of X-ray detectors down to energies of 1.5 keV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012654518455
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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