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Journal Article

Short-time emission of higher-angular-momentum photons by atomic transitions

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Debierre,  Vincent
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Citation

Lei, M. L., & Debierre, V. (2021). Short-time emission of higher-angular-momentum photons by atomic transitions. Journal of Physics B: Atomic, Molecular and Optical Physics, 54(2): 025002. doi:10.1088/1361-6455/abce95.


Cite as: https://hdl.handle.net/21.11116/0000-000A-30EA-8
Abstract
The short-time regime of spontaneous light emission by few-electron ions
is examined in detail, with a specific emphasis on the angular momentum
of the emitted light. It is found that, in general, photons carrying a
higher angular momentum are emitted with important probabilities, at
short times, in transitions that are not of the electric dipole type.
The probability of emission of such photons is found to be
parametrically non-negligible in this time regime, and even numerically
dominant for some cases. It is also found that, in all time regimes, the
emission of electric 2(n+1)-pole fields is typically numerically
dominant over the emission of magnetic 2(n)-pole fields by many orders
of magnitude. These results refine and deepen our understanding of the
emission of angular momentum-carrying light by simple atomic systems.