par Baye, Daniel Jean
Référence Physical review. C, Nuclear physics, 86, page (034306)
Publication Publié, 2012
Article révisé par les pairs
Résumé : When the long-wavelength approximation is not performed, extensions of the Siegert theorem can take various forms. An alternative expression is derived for the electric multipole fields, which is inspired by earlier works on photonuclear reactions. It is applied to the Siegert transformation of electric transition operators for single photon emission. In the particular case of isospin forbidden E1 transitions, which can be useful for some important radiative capture reactions, an approximation of this electric transition operator is established and discussed. © 2012 American Physical Society.