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 generalize the theory of nuclear decay and capture of Gamow that is basedon tunneling through the barrier and internal oscillations inside the nucleus.In our formalism an additional factor is obtained, which describes distributionof the wave function of the $\alpha$ particle inside the nuclear region. Wediscover new most stable states (called quasibound states) of the compoundnucleus (CN) formed during the capture of $\alpha$ particle by the nucleus.With a simple example, we explain why these states cannot appear in traditionalcalculations of the $\alpha$ capture cross sections based on monotonicpenetrabilities of a barrier, but they appear in a complete description of theevolution of the CN. Our result is obtained by a complete description of the CNevolution, which has the advantages of (1) a clear picture of the formation ofthe CN and its disintegration, (2) a detailed quantum description of the CN,(3) tests of the calculated amplitudes based on quantum mechanics (not realizedin other approaches), and (4) high accuracy of calculations (not achieved inother approaches). These peculiarities are shown with the capture reaction of$\alpha + ^{44}{\rm Ca}$. We predict quasibound energy levels and determinefusion probabilities for this reaction. The difference between our approach andtheory of quasistationary states with complex energies applied for the $\alpha$capture is also discussed. We show (1) that theory does not providecalculations for the cross section of $\alpha$ capture (according to modernmodels of the $\alpha$ capture), in contrast with our formalism, and (2) thesetwo approaches describe different states of the $\alpha$ capture (for the same$\alpha$-nucleus potential).

New quasibound states of the compound nucleus in $\alpha$-particle capture by the nucleus