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Freer, M.; Wuosmaa, A. H.; Betts, R. R.; Henderson, D. J.; Wilt, P.; Zurmühle, R. W.; Balamuth, D. P.; Barrow, S.; Benton, D.; Li, Q.; Liu, Z.; Miao, Yuqing

doi:10.1103/physrevc.49.r1751

Cited by 72 publications

(151 citation statements)

References 14 publications

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“…3 to be almost entirely determined by the first potential, which means sequential decay. The direct decay is about 1% in agreement with the experimental upper limit [12]. This energy distribution is then in complete agreement with experimental data.…”

supporting

confidence: 79%

“…In molecular physics an example is decay of excited states of the H 3 molecule into three hydrogen atoms [3]. In nuclear physics there exists a large number of three-body decaying systems of disparate structures and decay mechanisms, e.g., various excited states of 6 He, 6 Li, 12 C, 17 Ne. More and more high-quality experimental data have become available in all subfields [4 -7], and quantitatively accurate models are needed to extract and understand the underlying physics.…”

mentioning

confidence: 99%

“…-Accurate measurements of -particle energy distributions are available from decays of 0 and 1 resonances of 12 C [6,7,12,13]. The lowest 0 resonance is often described as a cluster state, whereas the 1 resonance in contrast is referred to as a shell-model state without any significant cluster structure [14 -18].…”

mentioning

confidence: 99%

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Energy Distributions from Three-Body Decaying Many-Body Resonances

et al. 2007

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We compute energy distributions of three particles emerging from decaying many-body resonances. We reproduce the measured energy distributions from decays of two archetypal states chosen as the lowest 0 and 1 resonances in 12 C populated in decays. These states are dominated by sequential, through the 8 Be ground state, and direct decays, respectively. These decay mechanisms are reflected in the ''dynamic'' evolution from small, cluster or shell-model states, to large distances, where the coordinate or momentum space continuum wave functions are accurately computed.

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confidence: 79%

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confidence: 99%

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Energy Distributions from Three-Body Decaying Many-Body Resonances

et al. 2007

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“…Also the inelastic form factor was calculated with reasonable success. With not much risk to be wrong, one may say that any microscopic theory which reproduces without adjustable parameters the inelastic form factor (see our discussion about this in Sect.10), implicitly deals with a wave function which has the same or very close properties as the one of Kamimura et [110,111] that the three body decay with respect to the two body one is suppressed by a factor of at least 10 −4 . This, however, does not speak against the α condensation interpretation of the Hoyle state.…”

Section: Nucleus Should Be Considered To Dissociate Into 3 α Clustementioning

confidence: 99%

Alpha particle clusters and their condensation in nuclear systems

et al. 2016

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In this article we review the present status of α clustering in nuclear systems. An important aspect is first of all condensation in nuclear matter. Like for pairing, quartetting in matter is at the root of similar phenomena in finite nuclei. Cluster approaches for finite nuclei are shortly recapitulated in historical order. The α container model as recently been proposed by Tohsaki-Horiuchi-Schuck-Röpke (THSR) will be outlined and the ensuing condensate aspect of the Hoyle state at 7.65 MeV in 12 C investigated in some detail. A special case will be made with respect to the very accurate reproduction of the inelastic form factor from the ground to Hoyle state with the THSR description. The extended volume will be deduced. New developments concerning excitations of the Hoyle state will be discussed. After 15 years since the proposal of the α condensation concept a critical assessment of this idea will be given. Alpha gas states in other nuclei like 16 O and 13 C will be considered. An important aspect are experimental evidences, present and future ones.The THSR wave function can also describe configurations of one α particle on top of a doubly magic core. The cases of 20 Ne and 212 Po will be investigated.

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“…On the other hand, the experiment 12 C(α,α) 12 C * carried out at the Birmingham cyclotron [29], UK, populates a new state compatible with an equilateral triangle configuration of three α particles. Still, the structure of the "Hoyle" state remains controversial as experimental results of its direct decay into three α particles are found to be in disagreement [31,32,33,34,35,36].…”

Section: Introductionmentioning

confidence: 99%

New Horizons in Fundamental Physics

Schramm¹,

Schäfer²

2017

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Fig. 1. Different types of clustering in nuclei that have been discussed the last two decades [2].A great deal of research work has been undertaken in α-clustering study since the pioneering discovery of 12 C+ 12 C molecular resonances half a century ago. 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 in light N =Z α-like 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.

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Limits for the 3α branching ratio of the decay of the 7.65 MeV,02+state inC

Cited by 72 publications

References 14 publications

Energy Distributions from Three-Body Decaying Many-Body Resonances

Energy Distributions from Three-Body Decaying Many-Body Resonances

Alpha particle clusters and their condensation in nuclear systems

New Horizons in Fundamental Physics

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