Alpha clustering in nuclei: another form of shape coexistence?

Jenkins, D. G.

doi:10.1088/0954-3899/43/2/024003

Cited by 16 publications

(15 citation statements)

References 56 publications

(116 reference statements)

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“…There is a considerable interest to the study of cluster structures and extremely deformed shapes in light nuclei [1][2][3][4][5][6][7][8][9][10]. Many of these structures are described in terms of clusters, the simplest one being the α-particle [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…The difficulty in investigating cluster and extremely deformed states is that they are generally unbound and lie at high excitation energies at low spins [2,10]. Moreover, they are either formed on the shoulder or in very shallow minima of potential energy surfaces [12,19]; thus, they are inherently unstable at low spin.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, obtaining unambiguous evidences for clustering (such as a transition strengths between different states and the structure of the wavefunction) is equally challenging and frequently ambiguous from experimental point of view. In addition, the mechanisms of the reactions used in experimental studies frequently favor the population of yrast or near-yrast states [10].…”

Section: Introductionmentioning

confidence: 99%

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From superdeformation to extreme deformation and clusterization in theN≈Znuclei of theA≈40mass region

Ray¹,

Afanasjev²

2016

Phys. Rev. C

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From superdeformation to extreme deformation and clusterization in the N ∼ Z nuclei of the A ∼ 40 mass region. A systematic search for extremely deformed structures in the N ∼ Z nuclei of the A ∼ 40 mass region has been performed for the first time in the framework of covariant density functional theory. At spin zero such structures are located at high excitation energies which prevents their experimental observation. The rotation acts as a tool to bring these exotic shapes to the yrast line or its vicinity so that their observation could become possible with future generation of γ−tracking (or similar) detectors such as GRETA and AGATA. The major physical observables of such structures (such as transition quadrupole moments as well as kinematic and dynamic moments of inertia), the underlying single-particle structure and the spins at which they become yrast or near yrast are defined. The search for the fingerprints of clusterization and molecular structures is performed and the configurations with such features are discussed. The best candidates for observation of extremely deformed structures are identified. For several nuclei in this study (such as 36 Ar), the addition of several spin units above currently measured maximum spin of 16 will inevitably trigger the transition to hyper-and megadeformed nuclear shapes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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From superdeformation to extreme deformation and clusterization in theN≈Znuclei of theA≈40mass region

Ray¹,

Afanasjev²

2016

Phys. Rev. C

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“…The case of the mid-sd-shell nucleus 28 Si is of particular interest as it shows the coexistence of deformed and cluster states at rather low energies [89,90]. Its ground state is oblate, with a partial α- 24 Mg structure, two prolate normal deformed bands are found, one built on the 0 + 2 state at 4.98 MeV and on the 0 + 3 state at 6.69 MeV.…”

Section: Si Nucleusmentioning

confidence: 99%

Clustering in Stable and Exotic Light Nuclei

Beck¹

2017

Nuclear Particle Correlations and Cluster Physics

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Since the pioneering discovery of molecular resonances in the 12 C+ 12 C reaction more than half a century ago a great deal of research work has been undertaken in alpha clustering. Our knowledge on physics of nuclear molecules has increased considerably and nuclear clustering remains one of the most fruitful domains of nuclear physics, facing some of the greatest challenges and opportunities in the years ahead. The occurrence of "exotic" shapes and Bose-Einstein alpha condensates in light N =Z alpha-conjugate nuclei is investigated. Various approaches of the superdeformed and hyperdeformed bands associated with quasimolecular resonant structures are presented. Evolution of clustering from stability to the drip-lines is examined: clustering aspects are, in particular, discussed for light exotic nuclei with large neutron excess such as neutron-rich Oxygen isotopes with their complete spectroscopy. * Review

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“…Experimentally, projectile fragmentations prove that α-cluster may be the building block of the atomic nuclei in the ground state and it is the most probable unit in channels of fragmentations. Many theoretical works [30][31][32][33] predicted that α-clusters could be present in the ground state of the basic structure of atomic nuclei. This prediction is supported the present experimental results in this study.…”

mentioning

confidence: 99%

Channels of projectile fragmentation of¹⁶O nucleus in nuclear emulsion

et al. 2018

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Experimental data are presented on the projectile fragments emitted from non-central collisions of 3.7 A GeV 16 O projectiles with nuclear emulsion. Charges of all projectile fragments are measured carefully and identified using δ-ray distributions. Each distribution is fitted by Gaussian shape and represented one of the possible charges of projectile fragments. Topology of 16 O fragmentation is reported and compared with that obtained at 60 A GeV. The multiplicity distributions for 16 O projectile fragments with charge 3Z7 are studied and it classified according to the size of the target nucleus. In this range of energy, the mechanism responsible for projectile fragmentation is independent on its energy. Experimental observations proved that there is high probability for production α-clusters than all other nuclear fragments. The production rate of α-clusters fragments due to 16 O fragmentations is studied at range of energies 2-200 A GeV. The dependence of α-clusters on target components (CNO and AgBr) is formulated. Experimental data indicates that α-cluster represents the main unit of the structure of atomic nucleus.

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Alpha clustering in nuclei: another form of shape coexistence?

Cited by 16 publications

References 56 publications

From superdeformation to extreme deformation and clusterization in theN≈Znuclei of theA≈40mass region

From superdeformation to extreme deformation and clusterization in theN≈Znuclei of theA≈40mass region

Clustering in Stable and Exotic Light Nuclei

Channels of projectile fragmentation of¹⁶O nucleus in nuclear emulsion

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Alpha clustering in nuclei: another form of shape coexistence?

Cited by 16 publications

References 56 publications

From superdeformation to extreme deformation and clusterization in theN≈Znuclei of theA≈40mass region

From superdeformation to extreme deformation and clusterization in theN≈Znuclei of theA≈40mass region

Clustering in Stable and Exotic Light Nuclei

Channels of projectile fragmentation of16O nucleus in nuclear emulsion

Contact Info

Product

Resources

About

Channels of projectile fragmentation of¹⁶O nucleus in nuclear emulsion