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

We formulate a microscopic theory to calculate cross section of the radiativeneutron capture on neutron-rich nuclei using the continuum quasiparticlerandom-phase approximation. This formulation is designed to be applied toneutron-rich nuclei around the $r$-process path, for which the compound nuclearmodel may not be appropriate. It takes into account effects of variousexcitation modes such as the soft dipole excitation, the giant resonances, andthe quasiparticle resonance in addition to the surface vibrations such asquadrupole and octupole modes. We perform numerical calculations to demonstratenew features of the present theory, employing reactions $^{89}{\rmGe}(n,\gamma)^{90}{\rm Ge}$ and $^{91}{\rm Zn}(n,\gamma)^{92}{\rm Zn}$ with$E1$ transitions populating the ground state, collective $2^{+}_{1}$ and$3^{-}_{1}$ states in $ ^{90}{\rm Ge}$ and $^{92}{\rm Zn}$. With theseexamples, we discuss enhanced resonance contributions in the $(n,\gamma)$reaction at low energy, which originate from the quasiparticle resonance andthe pygmy quadrupole resonance located just above the one neutron separationenergy, and from combination with the low-lying octupole vibrational state.

Continuum quasiparticle random-phase approximation for $(n,\gamma)$  reactions on neutron-rich nuclei: collectivity and resonances in low-energy  cross section