influence of emission from the internal region of the total bremsstrahlung spectra on the basis of realistic $\alpha$-nucleus potential has not been studied yet.

Taking into account *expansion in spherical waves* for description of angular correction of the wave function of photons [@Maydanyuk.nucl-th.0404013] and realistic form of interaction between the $\alpha$-particle and the daughter nucleus [@Maydanyuk.2006.EPJA], we achieved a little better agreement between such fully quantum approach and later obtained experimental data [@Boie.2007.PRL] for the $^{210}{\rm Po}$ nucleus (for explanation see Fig. 3 in [@Maydanyuk.2008.EPJA] and discussions here). Results in descriptions of the newest experimental data [@Maydanyuk.2008.EPJA; @Maydanyuk.2008.MPLA; @Maydanyuk.2009.NPA] for the $^{214}{\rm Po}$ and $^{226}{\rm Ra}$ nuclei seem to be enough good also, where we have been achieving agreement between theory and experiment up to 765 keV. But, a *multipole approach* (started from [@Tkalya.1999.JETP], then in [@Maydanyuk.2003.PTP]) seems to be the most accurate and corrected in spatial description of the emission of photons during the $\alpha$-decay. Such approach turns out to calculate probability without any normalization relatively experimental data (i. e. in co-called *absolute scale*), and achieves enough good agreement with them. This peculiarity adds power of prediction to the multipolar approach: it allows to study the bremsstrahlung during the 