  We present a quasiclassical theory of alpha decay accompanied by
bremsstrahlung with a special emphasis on the case of 210Po, with the aim of
finding a unified description that incorporates both the radiation during the
tunneling through the Coulomb wall and the finite energy E_gamma of the
radiated photon up to E_gamma on the order of Q_alpha/sqrt(eta), where Q_alpha
is the alpha-decay Q-value and eta is the Sommerfeld parameter. The corrections
with respect to previous quasiclassical investigations are found to be
substantial, and excellent agreement with a full quantum mechanical treatment
is achieved. Furthermore, we find that a dipole-quadrupole interference
significantly changes the alpha-gamma angular correlation. We obtain good
agreement between our theoretical predictions and experimental results.
