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

To observe the ${\gamma}$ rays emitted from the low-lying isomeric state of$^{229}$Th ($^{229\rm{m}}$Th), we aim to dope fluoride crystals with itsprecursor $^{229}$Pa. In this study, we produced $^{229}$Pa by a 30-MeV protonbombardment on $^{232}$Th and developed a chemical separation method. Thechemical yield of Pa was 93(4)%, and the physical production yield of$^{229}$Pa for the proton energy range of 29.0${-}$30.1 MeV was measured to be9.4(8) MBq/${\rm{\mu}}$Ah, which was more than 10 times higher than those of$^{232,230,228,233}$Pa. These high chemical and production yields will allow usto prepare fluoride crystals having a sufficient amount of $^{229}$Pa for theobservation of the ${\gamma}$ rays of $^{229\rm{m}}$Th.

Production and chemical separation of $^{229}$Pa toward observation of ${\gamma}$ rays of $^{229\rm{m}}$Th