Bremsstrahlung spectrum in α decay -: art. no. 037602

Using our previous approach to electromagnetic emission during tunneling, an explicit, essentially classical, formula describing the bremsstrahlung spectrum in a decay is derived. The role of tunneling motion in photon emission is discussed. The shape of the spectrum is a universal function of the ratio E-gamma/E-0, where E-gamma is the photon energy and E-0 is a characteristic energy depending only on the nuclear charge and the energy of the a particle. [S0556-2813(99)07308-2].