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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The search for solar axions produced by Compton ($\gamma+e^-\rightarrowe^-+A$) and bremsstrahlung-like ($e^-+Z \rightarrow Z+e^-+A$) processes hasbeen performed. The axion flux in the both cases depends on the axion-electroncoupling constant. The resonant excitation of low-lying nuclear level of$^{169}\rm{Tm}$ was looked for: $A+^{169}$Tm $\rightarrow ^{169}$Tm$^*$$\rightarrow ^{169}$Tm $+ \gamma$ (8.41 keV). The Si(Li) detector and$^{169}$Tm target installed inside the low-background setup were used to detect8.41 keV $\gamma$-rays. As a result, a new model independent restriction on theaxion-electron and the axion-nucleon couplings was obtained:$g_{Ae}\times|g^0_{AN}+ g^3_{AN}|\leq 2.1\times10^{-14}$. In model of hadronicaxion this restriction corresponds to the upper limit on the axion-electroncoupling and on the axion mass $g_{Ae}\times m_A\leq3.1\times10^{-7}$ eV (90%c.l.). The limits on axion mass are $m_A\leq$ 105 eV and $m_A\leq$ 1.3 keV forDFSZ- and KSVZ-axion models, correspondingly (90% c.l.).

Constraints on the axion-electron coupling for solar axions produced by Compton process and bremsstrahlung