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 atomic masses of the isotopes $^{206,207}$Ra have been measured viadecay-correlated mass spectroscopy using a multi-reflection time-of-flight massspectrograph equipped with an $\alpha$-TOF detector. The Ra isotopes wereproduced as fusion-evaporation products in the $^{51}$V+$^{159}$Tb reactionsystem and delivered by the gas-filled recoil ion separator GARIS-II at RIKEN.The $\alpha$-TOF detector provides for high-accuracy mass measurements bycorrelating time-of-flight signals with subsequent $\alpha$-decay events. Themasses of $^{206}$Ra and $^{207g,m}$Ra were directly measured using amulti-reflection time-of-flight mass spectrograph equipped with an $\alpha$-TOFdetector. A mass excess of ME = 3538(15) keV/c$^2$ and an excitation energy ofE$_{\rm ex}$ = 552(42) keV were determined. The $\alpha$-decay branching ratioof $^{207m}$Ra, b$\alpha$ = 0.26(20), was directly determined fromdecay-correlated time-of-flight signals, and the reduced alpha width of$^{207m}$Ra was calculated to be $\delta^2$ = 50+62-41 keV from the branchingratio. The spin-parity of $^{207m}$Ra was confirmed to be $J^\pi$ = 13/2$^-$from decay correlated mass measurement results.

Alpha-decay-correlated mass measurement of 206,207Ra using an $\alpha$-TOF detector equipped MRTOF-MS system