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 anomalous large radii are exotic phenomena observed around the neutrondripline. Around the neutron dripline, the weak binding of the last boundneutron(s) causes the drastic increase of the radius, which is called neutronhalo structure. Although the nucleus $^{24}$O is located at the dripline ofOxygen isotopes, the separation energies of one and two neutron(s) are 4.19 MeVand 6.92 MeV, respectively. In spite of this enough binding, the enhancement ofthe matter radius is observed. In this study, we microscopically describe thestructure change of $^{22}$O core in $^{24}$O and explain the observed largeradius based on the cluster model. Two degrees of freedom for the large radius;the relative distances among four $\alpha$ clusters and size of each $\alpha$cluster are examined, where Tohsaki interaction, which has finite rangethree-body terms is employed. The nucleus $^{24}$O has the almost the sameamount of the clusterization compared with $^{22}$O, but the expansion of each$\alpha$ cluster plays an important role. When two neutrons are added to$^{22}$O at the center, the expansion of each $\alpha$ clusters isenergetically more favored than enhancing the clustering for reducing thekinetic energy of the neutrons. The calculated rms matter radius of $^{22}$Oand $^{24}$O are 2.75 fm and 2.92 fm, respectively. Although these are slightlysmaller than the experimental values, the jump at $^{24}$O from $^{22}$O isreproduced.

Non-trivial effect for the large radius at the dripline of Oxygen isotopes