2010/05/31 by Göran Fäldt · 5 citations
Chemical Engineering · Engineering · Neuroscience · Physics and Astronomy · #Advanced Memory and Neural Computing #Catalysis and Oxidation Reactions #Neural dynamics and brain function #Particle physics #Physics #nucl-th
paper · pdf · doi:10.1103/physrevc.82.037603
published in Physical Review C 82(3) (American Institute of Physics) · 5 pages, 2 figures
arxiv created 2010/05/31 · openalex publication_date 2010/09/13 · arxiv updated 2014/11/21 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The coherent-nuclear reaction a+A\ensuremath→a^\ensuremath⋆+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^\ensuremath⋆\ensuremath→a+\ensuremathγ can be obtained. Well-known examples are the two-photon decays of the \ensuremathπ and \ensuremathη 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.