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

Time-resolved emission, excitation as well as emission decay curves ofCaF$_2$, SrF$_2$, BaF$_2$ doped with HoF$_3$ were investigated. Most intensiveemission bands near 168 nm, having long decay time, belong to spin-forbiddentransitions from 5d$^1$4f$^9$ high spin (HS) states to ground $^5$I$_8$ statesof Ho$^{3+}$ ions. Weak spin allowed 5d$^1$4f$^9$(LS)-4f$^{10}$ emission bandat 158 nm was observed only in CaF$_2$-Ho crystals. Spin allowed andspin-forbidden excitation bands were observed in all crystals near 166 and 155nm respectively. Fast component of spin-forbidden emissions due to multiphononrelaxation to low-lying 4f$^{10}$ Ho$^{3+}$ level was observed for allcrystals.

Vacuum ultraviolet 5d$^1$4f$^9$-4f$^{10}$ emission of Ho$^{3+}$ ions in alkaline-earth fluorides