New high precision study on the decay width of the Hoyle state in 12C

Rana, T. K.; Bhattacharya, S.; Bhattacharya, C.; Manna, S.; Kundu, S.; Banerjee, K.; Pandey, R.; Roy, Pratap; Dhal, A.; Mukherjee, G.; Srivastava, V.; Dey, A.; Chaudhuri, A. K.; Ghosh, T. K.; Sen, A.; Asgar, Md. A.; Roy, Tufan; Sahoo, Jayakrushna; Meena, Jitendra Kumar; Saha, A.; Saha, Rajarshi; Sinha, M. K.; Roy, A.

doi:10.1016/j.physletb.2019.04.028

Cited by 30 publications

(21 citation statements)

References 27 publications

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“…Ishikawa concluded that the direct decay contributes at a level lower than 0.1%. The latest experimental measurements [37] reject a direct decay contribution > 0.019%, which is an order of magnitude lower than this prediction.…”

Section: Carbon-12mentioning

confidence: 68%

“…Much experimental effort has been devoted to measuring the 3α direct decay width of the Hoyle state in recent years [33][34][35][36][37]. The current section focuses on the data of reference [35], first published as a letter in 2017, Hoyle state decay data from references [35] and [46].…”

Section: Carbon-12mentioning

confidence: 99%

“…This means that measuring the direct decay requires very high statistics data. At present, an upper limit of 0.0019% has been placed on the 3α direct decay branching ratio, utilising around 2 × 10 4 Hoyle state decay events [37].…”

Section: Carbon-12mentioning

confidence: 99%

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The Hoyle Family: The Search for Alpha-Condensate States in Light Nuclei

et al. 2020

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Our present understanding of the structure of the Hoyle state in 12 C and other near-threshold states in α-conjugate nuclei is reviewed in the framework of the α-condensate model. The 12 C Hoyle state, in particular, is a candidate for α-condensation, due to its large radius and α-cluster structure. The predicted features of nuclear α-particle condensates are reviewed along with a discussion of their experimental indicators, with a focus on precision break-up measurements. Two experiments are discussed in detail, firstly concerning the break-up of 12 C and then the decays of heavier nuclei. With more theoretical input, and increasingly complex detector setups, precision break-up measurements can, in principle, provide insight into the structures of states in α-conjugate nuclei. However, the commonly-held belief that the decay of a condensate state will result in N α-particles is challenged. We further conclude that unambiguously characterising excited states built on α-condensates is difficult, despite improvements in detector technology. This contribution has been presented during the ceremony of the Few-Body Systems Award for young professionals.

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Section: Carbon-12mentioning

confidence: 68%

Section: Carbon-12mentioning

confidence: 99%

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The Hoyle Family: The Search for Alpha-Condensate States in Light Nuclei

et al. 2020

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“…Much experimental effort has been devoted to measuring the 3α direct decay width of the Hoyle state in recent years [15][16][17][18]. The current section focuses on the data of reference [16], first published as a letter in 2017.…”

Section: Carbon-12mentioning

confidence: 99%

The Hoyle Family: break-up measurements to probe α-condensation in light nuclei

Smith

Bishop

Hirst

et al. 2020

SciPost Phys. Proc.

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The ^{12}12C Hoyle state is a candidate for \alphaα-condensation, due to its large volume and \alphaα-cluster structure. This paper discusses precision break-up measurements and how they can elucidate \alphaα-condensate structures. Two experiments are discussed in detail, firstly concerning the break-up of ^{12}12C and then the decays of heavier nuclei. With more theoretical input, and increasingly complex detector setups, precision break-up measurements can, in principle, provide insight into the structures of states in \alphaα-conjugate nuclei. At present, such searches have not delivered evidence for \alphaα-condensation in ^{12}12C or ^{16}16O.

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“…The phase spaces are calculable using the Fermi breakup model [19] and the direct decay is suppressed by a factor of 10 3 relative to the sequential decay. At present, an upper limit of 0.0019% has been placed on the 3α direct decay branching ratio, utilising around 2 × 10 4 Hoyle state decay events [18].…”

Section: Carbon-12mentioning

confidence: 99%

Report on scipost_201911_00026v1

2019

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The 12 C Hoyle state is a candidate for α-condensation, due to its large volume and αcluster structure. This paper discusses precision break-up measurements and how they can elucidate α-condensate structures. Two experiments are discussed in detail, firstly concerning the break-up of 12 C and then the decays of heavier nuclei. With more theoretical input, and increasingly complex detector setups, precision break-up measurements can, in principle, provide insight into the structures of states in α-conjugate nuclei. At present, such searches have not delivered evidence for α-condensation in 12 C or 16 O.

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New high precision study on the decay width of the Hoyle state in 12C

Cited by 30 publications

References 27 publications

The Hoyle Family: The Search for Alpha-Condensate States in Light Nuclei

The Hoyle Family: The Search for Alpha-Condensate States in Light Nuclei

The Hoyle Family: break-up measurements to probe α-condensation in light nuclei

Report on scipost_201911_00026v1

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