Bremsstrahlung radiation by a tunneling particle: A time-dependent description - art. no. 031602

We study the bremsstrahlung radiation of a tunneling charged particle in a time-dependent picture. In particular, we treat the case of bremsstrahlung during alpha decay and show deviations of the numerical results from the se miclassical estimates. A standard assumption of a preformed alpha particle inside the well leads to sharp high-frequency lines in the bremsstrahlung e mission. These lines correspond to "quantum beats'' of the internal part of the wave function during tunneling arising from the interference of the ne ighboring resonances in the open well. [S0556-2813(99)50709-7].