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Doubly radiative np capture.M1-M1 transitions

  • Published:
Il Nuovo Cimento A (1965-1970)

An Erratum to this article was published on 01 February 1979

Summary

A precise evaluation of the doubly radiative np capture cross-section in theM1-M1 mode is presented. This evaluation also includes meson exchange contributions together with the extended form of the contact term giving a gauge-invariant transition amplitude in the one-pion exchange approximation. In agreement with previous calculations, theM1-M1 total cross-section σ2γ(M1-M1) is three orders of magnitude smaller than the dominantE1-E1 one. The exchange contribution to σ2γ(M1-M1) is nearly 1%.

Riassunto

Presentiamo una valuatazione accurata della sezione d’urto della reazione di cattura np con emissione di due fotoniM1. Nel calcolo sono inclusi i contributi delle correnti di scambio mesoniche e del termine di contatto, generalizzato in modo che l’ampiezza di transizione sia invariante per trasformazioni di gauge nell’approssimazione dello scambio di pione. In accordo con i calcoli precedenti la sezione d’urto totale σ2γ per la transizioneM1-M1 risulta di tre ordini di grandezza più piccola della σ2γ per le transizioni dominantiE1-E1. Il contributo delle correnti di scambio a σ2γ(M1-M1) è di circa l’1%.

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Authors and Affiliations

  1. Istituto di Fisica Teorica dell’Università, Firenze, Italia

    A. Cambi, S. Craparo, B. Mosconi & P. Ricci

  2. Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, Italia

    A. Cambi, S. Craparo, B. Mosconi & P. Ricci

Authors
  1. A. Cambi
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  2. S. Craparo
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  3. B. Mosconi
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  4. P. Ricci
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Additional information

To speed up publication, the authors of this paper have agreed to not receive the proofs for correction.

An erratum to this article is available at http://dx.doi.org/10.1007/BF02773457.

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Cambi, A., Craparo, S., Mosconi, B. et al. Doubly radiative np capture.M1-M1 transitions. Nuov Cim A 47, 421–429 (1978). https://doi.org/10.1007/BF02896233

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  • DOI: https://doi.org/10.1007/BF02896233

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