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 Plus annual

Presents the access of premium content as premium feature

Premium Content

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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The inelastic scattering cross section for muons, $\mu^-$, with energies$E$=9--100~eV from the $^{229}$Th nuclei is calculated in the framework of thesecond order of the perturbation theory for the quantum electrodynamics. Thedominant contribution to the excitation of the low energy isomer$^{229m}$Th$(3/2^+,8.19\pm0.12$~eV) comes from the $E2$ multipole. Theexcitation cross section reaches the value of $10^{-21}$ cm$^2$ in the range$E\approx$10~eV. This is four to five orders of magnitude larger than theelectron excitation cross section and enough for efficient excitation of$^{229m}$Th on the muon beam at the next generation of muon colliders.

Cross section of the Coulomb excitation of $^{229m}$Th by low energy muons