Il Nuovo Cimento (1955-1965)

, Volume 35, Issue 2, pp 492–509 | Cite as

Les projecteurs et la théorie des résonances dans les réactions nucléaires



A method, is constructed to separate out resonances using projectors. The method takes into account the bound states imbedded in the continuum (Fonda, Newton) as well as the bound states in the closed channels (Feshbach). The starting point is Feshbach’s unified theory. With the condition that the resonant part of the transition amplitude is a sum of Breit-Wigner terms one obtains the dissociation of the effects of these two kinds of resonances. To conclude the method will be discussed as an exact theory of all resonances.


Si costruisce un metodo per rendere esplicite le risonanze con l’uso di proiettori; questo metodo tien conto degli stati legati inseriti nel continuo (Fonda, Newton) ed anche degli stati legati nei canali chiusi (Feshbach). Il punto di partenza è la teoria unificata di Feshbach: con la condizione che la parte risonante dell’ampiezza di transizione sia una somma di termini di Breit-Wigner, si ottiene la separazione degli effetti di queste due specie di risonanze. Per concludere si discute il metodo come una teoria esatta per tutte le risonanze.


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Copyright information

© Società Italiana di Fisica 1965

Authors and Affiliations

  • M. Coz
    • 1
  1. 1.Laboratoire de Physique ThéoriqueGroupe IOrsay

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