English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We revisit the theory of bremsstrahlung in $\alpha$ decay with a special emphasis on the case of $^{210}$Po, with the aim of finding a unified quasiclassical 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 $E_\gamma\sim Q_\alpha/\sqrt{\eta}$, 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. Thus, the assumption of a dipole pattern in the analysis of experimental data, obtained with the typically restricted restricted solid angles covered by detectors, is not adequate

Quasiclassical description of bremsstrahlung accompanying α decay including quadrupole radiation