Remark on the Primakoff effect
2010 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 82, no 3, 037603- p.Article in journal (Refereed) Published
The coherent-nuclear reaction a + A -> a(star) + A is in the small-angle region dominated by the one-photon-exchange mechanism, often referred to as the Primakoff effect. In this region information about the electromagnetic decay a(star) -> a + gamma can be obtained. Well-known examples are the two-photon decays of the p and eta mesons. Also, decays of charged hadrons can be studied. For charged hadrons the one-photon-exchange amplitude comes with a Coulomb-phase factor and a Coulomb-form factor, which depend on the ratio between transverse-and longitudinal-momentum transfers, the latter being fixed. At the peak of the cross-section distribution, where the two momentum transfers are equal, the form factor could cut down the cross-section value by as much as 40%. Consequently, a determination of a radiative-decay rate that relies on the peak value becomes sensitive to a proper treatment of the Coulomb-form factor.
Place, publisher, year, edition, pages
2010. Vol. 82, no 3, 037603- p.
IdentifiersURN: urn:nbn:se:uu:diva-134894DOI: 10.1103/PhysRevC.82.037603ISI: 000281774000006OAI: oai:DiVA.org:uu-134894DiVA: diva2:374075