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 rare-earth peak in the $r$-process abundance pattern depends sensitivelyon both the astrophysical conditions and subtle changes in nuclear structure inthe region. This work takes an important step elucidating the nuclear structureand reducing the uncertainties in $r$-process calculations via precise atomicmass measurements at the JYFLTRAP double Penning trap. $^{158}$Nd, $^{160}$Pm,$^{162}$Sm, and $^{164-166}$Gd have been measured for the first time and theprecisions for $^{156}$Nd, $^{158}$Pm, $^{162,163}$Eu, $^{163}$Gd, and$^{164}$Tb have been improved considerably. Nuclear structure has been probedvia two-neutron separation energies $S_{2n}$ and neutron pairing energy metrics$D_n$. The data do not support the existence of a subshell closure at $N=100$.Neutron pairing has been found to be weaker than predicted by theoretical massmodels. The impact on the calculated $r$-process abundances has been studied.Substantial changes resulting in a smoother abundance distribution and a betteragreement with the solar $r$-process abundances are observed.

physical review letters

Precision mass measurements on neutron-rich rare-earth isotopes at  JYFLTRAP - reduced neutron pairing and implications for the $r$-process  calculations