Multiple electromagnetic excitation with relativistic heavy ions

Abstract

The multiple electromagnetic excitation with fast projectiles (heavy ions) is studied theoretically in the sudden approximation. Of special interest is the excitation of rotational states coupled to giant (dipole) vibrations. Closed form expressions are obtained for the excitation of a rigid rotor. The strong pulse of high energy equivalent photons in relativistic heavy ion collisions opens up new possibilities for nuclear structure studies, not possible e.g. with electron scatterirtg or nuclear Raman scattering. It is also pointed out that the "Brink-hypothesis" can be investigated in a new way by means of multiple electromagnetic excitation with relativistic heavy ions of low lying states coupled to the giant dipole mode.

Multiple electromagnetic excitation in fast peripheral heavy ions collisions

“…1a of Ref. [10] it can be seen that higher order effects are negligible for the value of the strength parameter C. This is in agreement with the result found in the coupled channel calculation of Ref. [2].…”

“…For loosely bound states, e.g. in 11 Be = 10 Be + n, we use simple model wave functions to reveal the characteristic parameters. We choose two models, with the correct asymptotic behaviour.…”

Multi-photon exchange processes in ultraperipheral relativistic heavy-ion collisions

“…For any function f (t 1 , t 2 , · · · , t n ) which is symmetric in all variables t i Let us give here also an example of two modes, which are coupled (i.e. no longer independent): the excitation of vibrational and rotational modes of a nucleus [26]. These modes mix due to rotation-vibration coupling.…”