Eur. Phys. J. A (2006) 28: 283-294
https://doi.org/10.1140/epja/i2006-10037-5

Nuclear Structure and Reactions

Angular analysis of bremsstrahlung in α-decay

Institute for Nuclear Research, National Academy of Sciences of Ukraine, prosp. Nauki, 47, 03680, Kiev-28, Ukraine

^* e-mail: maidan@kinr.kiev.ua

Received: 9 March 2006
Accepted: 4 May 2006
Published online: 14 July 2006

Abstract

A new quantum electrodynamical method of calculations of bremsstrahlung spectra in the α-decay of heavy nuclei taking into account the angle between the directions of α-particle motion (or its tunneling) and photon emission is presented. The angular bremsstrahlung spectra for ²¹⁰Po have been obtained for the first time. According to calculations, the bremsstrahlung in the α-decay of this nucleus depends extremely weakly on the angle. Taking into account nuclear forces, such dependence is not changed visibly. An analytical formula of the angular dependence of the bremsstrahlung spectra is proposed and gives its harmonic behavior. The extremal values of the angle, at which the bremsstrahlung has maximal and minimal values, have been found.