Abstract
The parity of the number of zeros of one-photon multipole transition matrix elements for an electron in a point Coulomb field is examined, generalising on some multipole transitions in the long-wavelength limit. Results are obtained for the general multipole matrix element with fixed angular momentum, Delta l not=0, retardation being included. For low multipolarities, results are compared with those obtained in the long-wavelength approximation, and cases in which results differ are indicated. The method involves determining the sign of the matrix element both at very low photon energy (for unphysical situations below the photoelectric threshold not corresponding to real bound-bound transitions) and in the limit of high photon energy.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Physics B: Atomic, Molecular and Optical Physics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
