Evolution Of Clustering Structure Through The Momentum Distributions In ^8-10Be Isotopes From Clustering Picture

Model is one of the way that human understand nature.The complexities of nu-clear force make many nuclear model that start from different angles and show some natures.For example,we could study fission with liquid-drop model,we could investi-gate the spherical-like nuclei with shell-model,and we also could discuss the motion of nucleons with Fermi-gas-model.With the accumulation of data from experiments,the cluster structure were discovered,which makes cluster model become one of the most popular nuclear model nowadays.Here,the Tohsaki-Horiuchi-Schuck-R?pke(THSR)wave functions which is based on non-localized motion is the main part of the theory.It is a popular direction,and very suitable for describing the light nuclear in low energy.Correlation effect including nucleon-nucleon correlation,cluster-nucleon correla-tion and cluster-cluster correlation is also a hot problem in nuclear physics nowadays.The unequal interaction between nucleon and nucleon is the origin of correlation effect.It would be set the form from specify cases such as localized or Gaussian container pic-ture basing on non-localized.The introduction of correlation effects is not only for fitting the calculation to experiment,but also providing a more easier understanding picture for nuclear.In this work,we investigated the evolution of clustering structure through the mo-mentum distributions in the^8-10Be isotopes.That is,we discussed how the correlation of inter-cluster basing on non-localized to effect the momentum distribution of^8-10Be isotopes.The nucleon dynamics within the inter-cluster antisymmetrization and cor-relation effect are discussed via the momentum distribution of a Brink type?-?wave function.The result shows that,the low momentum components will be reduced and the higher momentum tail will be enhanced during two?-cluster become closer.For the state with a small?-?distance,we also observe a significant depression with a dip structure at zero momentum.In addition,we find the“cluster structure”in the in-trinsic frame of momentum space,which is complementary to its significant?-cluster dissolution in the coordinate space because of the strong antisymmetrization.For the physical^8-10Be isotopes,the THSR wave functions are adopted.The evolution from the dilute clustering state to the compact one is demonstrated by a successive depres-sion at zero momentum of nucleon distribution for the two?clusters within 8-10Be isotopes.For the compact 10Be nucleus,the momentum distribution of all nucleons shows significant depression at zero momentum with a dip structure,which is found to be contributed by both the inter-cluster antisymmetrization and the p-orbit occupation of the valence neutrons.This study discussed and summarized the rules of inter-cluster correlation in different nuclei on momentum.And it proposes a new window for the investigations of the inter-clustering effects via the low-momentum components of nu-clei,which is expected to be extended to the heavier nuclear clustering states.