Structure of excited states of unstable nuclei studied with antisymmetrized molecular dynamics

Kanada-En’yo, Yoshiko; Horiuchi, Hisashi; Doté, Akinobu

doi:10.1088/0954-3899/24/8/025

Cited by 39 publications

(56 citation statements)

References 28 publications

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“…A negative parity rotational band with a 1 − state at 5.96 MeV as band-head is also reported in [1]. A molecular band is also built on the 0 + state at 6.18 MeV, strongly characterized by a α : 2n : α configuration [2]. For this band, the 2 + state has been found at 7.54 MeV and the subsequent 4 + member was assigned in Ref.…”

Section: Introductionmentioning

confidence: 65%

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Study of cluster structures in¹⁰Be and¹⁶C neutron-rich nuclei via break-up reactions

Dell’Aquila

Acosta

Amorini

et al. 2016

EPJ Web of Conferences

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Projectile break-up reactions induced on polyethylene (CH 2 ) target are used in order to study the spectroscopy of 10 Be and 16 C nuclei. For the present experiment we used 10 Be and 16 C beams delivered by the FRIBs facility at INFN-LNS, and the CHIMERA 4π multi-detector. 10 Be and 16 C structures are studied via a relative energy analysis of break-up fragments. The 4 He+ 6 He break-up channel allowed us to study the spectroscopy of 10 Be; in particular we find evidence of a new state in

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Section: Introductionmentioning

confidence: 65%

“…This nucleus is characterized by a deformed ground state [2] on which a positive parity rotational band is built. While the 2 + member of the 0 + g.s.…”

Section: Introductionmentioning

confidence: 99%

Study of cluster structures in¹⁰Be and¹⁶C neutron-rich nuclei via break-up reactions

Dell’Aquila

Acosta

Amorini

et al. 2016

EPJ Web of Conferences

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“…Thus, the molecular structure of the 10 Be ground state, which is bound with respect to two neutron emission by 8.48 MeV and to single neutron decay by 6.81 MeV, is unlikely to be strongly developed. The 5.9583 MeV [2 + ], 5.9599 MeV [1 − ], 6.1793 MeV [0 + ] and 6.2633 MeV [2 − ] quartet of states lie much closer to the cluster decay threshold and studies suggest that they may have a molecular structure which is much more pronounced [14,15]. The 1 − and 2 − states have been interpreted as being members of a K π = 1 − rotational band [13] with the two valence neutrons in a σ-π configuration.…”

Section: Two α-Particles Plus Three Neutrons: 11 Bementioning

confidence: 99%

Cluster Structure of 12C and 11Be

et al. 2010

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“…24) -26) Particularly impressive are the density distributions obtained for the ground state 0 + and second 0 + state of 10 Be, which have been obtained by projection on spin and parity. 26) The formation of covalent bonds with the (σ) 2 and (π) 2 configurations is very conspicuous in the density distributions. 26) …”

Section: The Beryllium Isotopesmentioning

confidence: 99%

“…26) The formation of covalent bonds with the (σ) 2 and (π) 2 configurations is very conspicuous in the density distributions. 26) …”

Section: The Beryllium Isotopesmentioning

confidence: 99%

Nuclear Clusters and Covalently Bound Nuclear Molecules

Oertzen

2002

Prog. Theor. Phys. Suppl.

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Light N=Z nuclei show pronounced clustering for exited states close to the decay thresholds. This fact is expressed in the Ikeda-Diagram. In neutron-rich nuclei, low lying states close to the neutron drip-line show also pronounced clustering with α-particles and heavier closed shell clusters. For the valence neutrons a concept based on molecular orbitals can be used for their single particle wave functions. Covalent binding between α-particles due to valence neutrons and a related shallow local potential is now known to be responsible for particular structures in light neutron rich nuclei, like dimers in Be-isotopes, and trimers in C-isotopes. A local potential as between two α-particles can be defined between other clusters, for example between α-particles and 16 O, giving rise to intrinsic reflection asymmetric molecular structures in 21 Ne as parity doublets. An Extended Ikeda Diagram can be constructed based on these concepts with clusters and covalent neutrons. §1. IntroductionWe can look back into 30 years of studies of clustering phenomena in nuclear physics. There has been a steady evolution of the field, with a particularly strong push in recent years due to the study of neutron rich exotic nuclei. The earlier work was focused on light nuclei with N=Z and their reactions, which has been on the forefront of research, in particular due to the observation of the heavy-ion resonances. Many theoretical concepts have been clarified in the last decades, specifically the equivalence of the shell model description with the cluster model approaches, once antisymmetrisation is considered in its full consequence (see also Ref. 1)).The shell model approaches made big progress because they were able to include larger and larger model space. However, the need for cluster models can be illustrated by the fact that the most extensive shell model calculations 2) do not produce the famous second 0 + -state of 12 C. The long standing problem how to define a cluster has been a line of thought all this time. 1) One approach is perfectly illustrated by the diagram 3), 4) proposed by Ikeda in 1968. In Fig. 1 this diagram is shown. The concept suggests that states of a particular cluster-(sub)structure appear close to the threshold for the decay of the composite system into these "fragments". This can actually be observed with rising excitation energy starting from the bound states of normal nuclei, as well as function of decreasing binding, when approaching the dripline. The main physical effect of the diagram resides in the properties of the nucleon-nucleon interaction, which gives rise to saturation and the stabilisation of clusters with particular "magic" numbers, and their mutually reduced interaction.

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Structure of excited states of unstable nuclei studied with antisymmetrized molecular dynamics

Cited by 39 publications

References 28 publications

Study of cluster structures in¹⁰Be and¹⁶C neutron-rich nuclei via break-up reactions

Study of cluster structures in¹⁰Be and¹⁶C neutron-rich nuclei via break-up reactions

Cluster Structure of 12C and 11Be

Nuclear Clusters and Covalently Bound Nuclear Molecules

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Structure of excited states of unstable nuclei studied with antisymmetrized molecular dynamics

Cited by 39 publications

References 28 publications

Study of cluster structures in10Be and16C neutron-rich nuclei via break-up reactions

Study of cluster structures in10Be and16C neutron-rich nuclei via break-up reactions

Cluster Structure of 12C and 11Be

Nuclear Clusters and Covalently Bound Nuclear Molecules

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Product

Resources

About

Study of cluster structures in¹⁰Be and¹⁶C neutron-rich nuclei via break-up reactions

Study of cluster structures in¹⁰Be and¹⁶C neutron-rich nuclei via break-up reactions