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  • Artikel: DFG Deutsche Nationallizenzen  (4)
  • 1980-1984  (4)
Datenquelle
  • Artikel: DFG Deutsche Nationallizenzen  (4)
Materialart
Erscheinungszeitraum
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    The European physical journal 295 (1980), S. 327-329 
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The explicit, analytical expression of the photorecombination cross section of negative particles with nuclei has been deduced in terms of non-confluent, hypergeometrical functions of complex variable. The initial population of antiprotons, after atomic recombination with hydrogen, deuterium and tritium, has been calculated.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Il nuovo cimento della Società Italiana di Fisica 1 (1982), S. 813-827 
    ISSN: 0392-6737
    Schlagwort(e): Exotic atoms and molecules (containing mesons, muons and other abnormal particles)
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Beschreibung / Inhaltsverzeichnis: Riassunto Usando la completezza degli stati del discreto piú quelli del continuo e considerando come stato iniziale una funzione d'onda a energia positiva appartenente allo spettro continuo di un campo coulombiano, si calcola una regola di somma totale per i processi radiativi. Usando altri metodi, si calcola la regola di somma parziale di cattura radiativa e quella di bremsstrahlung, che sono di particolare interesse nel campo degli atomi esotici, nei processi di raffreddamento in acceleratori, in fisica del plasma. Si deduce come conseguenza anche la regola di somma di bremsstrahlung inversa, utile in astrofisica. Inoltre, introducendo un'energia media, si deduce l'energia emessa da particelle negative di densitàN e aventi distribuzione statisticaf(V), dopo che si sono ricombinate radiativamente con particelle positive di densitàN i . L'energia eventualmente assorbita nel processo di bremsstrahlung inversa è anche dedotta.
    Kurzfassung: Резюме Считая, что волновая функция начального состояния с положительной энергией прнадлежит непрерывному спектру Кулоновского поля, мы выводим, используя полноту дискретных плюс непрерывных состояний, полные правила сумм, используя другие методы, правила сумм для радиационного захвата и тормозного излучения, которые представляют интерес для экзотических атомов, процессов охлаждения и физики плазмы. Также выводится правило сумм для обратного тормпзного излучения, представляющее интерес в астрофизике. Вводя среднюю энергию, мы выводим энергию, излученную отрицательными частицами с плотностью и статистическое распредениеf(V) после радиационной атомной рекомбинации с положительными частицами, принадлежащими системе с плотностьюN i . Также определяется энергия, которая поглощается в процессе обратного тормозного излучения.
    Notizen: Summary Considering as the initial state a positive-energy wave function belonging to the continuum spectrum of a Coulomb field, we derive, using completeness for the discrete plus the continuum states, the total sum rule and, using other techniques, the radiative capture and the bremsstrahlung sum rules, which are of interest in exotic atoms, cooling processes and plasma physics. As a consequence, the inverse-bremsstrahlung sum rule, of interest in astrophysics, is also deduced. Introducing an average energy, we deduce the energy emitted by negative particles of densityN e and statistical distributionf(V) after radiative atomic recombination with positive particles belonging to a system of densityN i . The energy that is eventually absorbed in the inverse-bremsstrahlung process is likewise deduced.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    The European physical journal 300 (1981), S. 263-271 
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We calculate the radiative atomic recombination ofμ −,π −,K − with a nucleus. In the initial state the negative particle moves in a Coulomb field, in the continuous spectrum, with positive energy and is captured into the bound orbit (n,l) of negative energy. We consider the exotic atom as a hydrogenic atom. The analytical expression of the recombination cross section, together with a “low energy” approximation, is derived. We obtain information on the atomic initial population: the results presented here show that the Bohr statistical distribution, used in the case of neutral atoms, is not correct in this case.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    The European physical journal 308 (1982), S. 195-197 
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract An exact calculation ofμ + e − Coulomb capture cross sections at various energies in the centre-of-mass system is reported. The population of 1s, 2s and 2p levels as function of the time elapsed after muonium formation is shown.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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