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Metelko, C.; Freer, M.; Ashwood, N. I.; Curtis, N.; Clarke, N.M.; Soić, N.; Ziman, V.; Woolliscroft, R. J.; Pain, S. D.; Pucknell, V.; Lemmon, R. C.; Fulton, B.R.; Watson, D. L.; Ward, R. P.; Varley, David F.

doi:10.1103/physrevc.68.054321

Cited by 14 publications

(7 citation statements)

References 29 publications

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“…In this respect the alternative reaction 12 C( 16 O, 12 C 12 C)α has been extremely productive. The spectrum in figure 42(a) shows the measurements of the breakup of 24 Mg to two ground state 12 C nuclei at incident 16 O energies of 115 MeV (Freer et al [147]) and 160 MeV [148]. The excitation energy spectrum extends from about 20 MeV up to 55 MeV, and provides evidence for resonant structures persisting to extremely high excitation energies in the 24 Mg system, a remarkable result as complexity might be expected to increase exponentially with excitation energy.…”

Section: Large Di-nuclear Clustersmentioning

confidence: 99%

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The clustered nucleus—cluster structures in stable and unstable nuclei

Freer¹

2007

Rep. Prog. Phys.

325

381

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The subject of clustering has a lineage which runs throughout the history of nuclear physics. Its attraction is the simplification of the often uncorrelated behaviour of independent particles to organized and coherent quasi-crystalline structures. In this review the ideas behind the development of clustering in light nuclei are investigated, mostly from the stand-point of the harmonic oscillator framework. This allows a unifying description of alpha-conjugate and neutron-rich nuclei, alike. More sophisticated models of clusters are explored, such as antisymmetrized molecular dynamics. A number of contemporary topics in clustering are touched upon; the 3α-cluster state in 12 C, nuclear molecules and clustering at the drip-line. Finally, an understanding of the 12 C + 12 C resonances in 24 Mg, within the framework of the theoretical ideas developed in the review, is presented.

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Section: Large Di-nuclear Clustersmentioning

confidence: 99%

“…Figure 42. (a) Resonances observed in the 12 C( 16 O,24 Mg * ) breakup reaction[147,148]. (b) The energy-spin systematics of the breakup resonances, from[148].…”

mentioning

confidence: 99%

The clustered nucleus—cluster structures in stable and unstable nuclei

Freer¹

2007

Rep. Prog. Phys.

325

381

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“…The most recent study found of the 12 C + 12 C reaction was [21]. We have observed individual levels with neutron energy less than 11 MeV from this reaction at an incident energy of 20 MeV.…”

Section: Symmetric Reactionsmentioning

confidence: 80%

Development of a New Method for Measurement of Neutron Detector Efficiency up to 20 MeV

Kornilov

Grimes

Massey

et al. 2014

Nuclear Data Sheets

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A new approach to neutron detector efficiency detemination has been taken. A neutron detector has been calibrated with a 252 Cf source at low energy. The calibration can be extended to energies above 8 MeV with accelerator-based neutron sources. This techniques uses the fact that the cross section for a symmetric reaction with nucleus of atomic number A yielding a final nucleus with atomic number (2A − 1) and a neutron A + A → (2A − 1) + n. This reaction must be symmetric about 90 • in the center-of-mass system. The laboratory energies for the neutrons at the paired energies differ substantially. Thus, an efficiency known at one of the two angles can be used to determine the efficiency to higher energies or, for a negative Q, to lower neutron energies.

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“…As a further near-inverse of radiative capture, break-up reactions are also highly relevant. Breakup of 24 Mg into 12 C-12 C was measured using the 12 C( 16 O, 12 C 12 C)α reaction [39]. Breakup resonances were measured from about 30 to 50 MeV excitation energy in 24 Mg and spin systematics was extracted from the data.…”

Section: How To Advance Experiment?mentioning

confidence: 99%

Weighing the evidence for clustering in nuclei

Jenkins

Courtin

2015

J. Phys. G: Nucl. Part. Phys.

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Clustering in nuclei is a long-standing topic in nuclear physics. While it has attracted much experimental and theoretical attention over the years, it is a model which is still controversial in terms of whether such clustering can be clearly delineated and separated from the complexity of nuclear structure described within more conventional nuclear models. In this sense, there is still ambiguity in terms of the uniqueness and relevance of the clustering description. What is often not clearly articulated is what would provide the most compelling evidence for clustering in different contexts. As a means of illustrating these issues, two strands of this topic will be discussed: alpha clustering in light nuclei and clustering in the 12C+12C system. Recent work in these areas will be reviewed and scope for future work will be highlighted.

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C12+C12cluster resonances in
C. Metelko
¹
,
M. Freer
²
,
N. I. Ashwood
³

et al.

Cited by 14 publications

References 29 publications

The clustered nucleus—cluster structures in stable and unstable nuclei

The clustered nucleus—cluster structures in stable and unstable nuclei

Development of a New Method for Measurement of Neutron Detector Efficiency up to 20 MeV

Weighing the evidence for clustering in nuclei

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C12+C12cluster resonances inC. Metelko1, M. Freer2, N. I. Ashwood3 et al.

Cited by 14 publications

References 29 publications

The clustered nucleus—cluster structures in stable and unstable nuclei

The clustered nucleus—cluster structures in stable and unstable nuclei

Development of a New Method for Measurement of Neutron Detector Efficiency up to 20 MeV

Weighing the evidence for clustering in nuclei

Contact Info

Product

Resources

About

C12+C12cluster resonances in
C. Metelko
¹
,
M. Freer
²
,
N. I. Ashwood
³

et al.