Estimation of direct components of the decay of the Hoyle state

Rana, T. K.; Bhattacharya, S.; Bhattacharya, C.; Kundu, S.; Banerjee, K.; Ghosh, T. K.; Mukherjee, G.; Pandey, R.; Roy, Pratap; Srivastava, V.; Gohil, M.; Meena, Jitendra Kumar; Pai, H.; Saha, A.; Sahoo, Jayakrushna; Saha, Rajarshi

doi:10.1103/physrevc.88.021601

Cited by 45 publications

(22 citation statements)

References 28 publications

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“…The number of decay events from the Hoyle state is about 21 000, which is higher than that in Ref. [21]. The background level is about 0.1%, which is deduced from the total kinetic energy spectrum in Fig.…”

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confidence: 58%

“…Although the reaction is the same as in Ref. [18], the aim of the present Letter is to clarify the direct 3α decay branch of 0.91 AE 0.14% reported by Rana et al [21] with more statistics by measuring it at high energy and forward angles.…”

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confidence: 78%

“…After the report by Raduta et al, several experiments have been performed, and they all have obtained results supporting that of Freer et al [19,20]. Very recently, Rana et al succeeded in estimating a nonzero value of the direct 3α decay branch from the complete kinematics measurement of the 12 Cðα; α 0 Þ3α reaction [21].…”

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confidence: 79%

“…The direct decay of the linear 3α chain (DDL in Refs. [17,20,21]) is not included in our analysis. Figure 3 shows Dalitz plots of experimental data and results of Monte Carlo simulations for three decay mechanisms (SD, DDE, and DDΦ).…”

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confidence: 99%

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Further Improvement of the Upper Limit on the Direct3αDecay from the Hoyle State inC12

et al. 2014

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The direct 3α decay branch from the 02+ state at Ex=7.65 MeV in 12C, which is known as the Hoyle state, is considered to affect the triple-α reaction rate strongly and to give crucial information on its structure. We have performed a high-precision measurement of the 3α decay from this state using the 12C(12C,3α)12C reaction at E12C=110 MeV. The branching ratio of the direct 3α decay was under the detection limit in the present experiment. By comparing with Monte Carlo simulations for three decay mechanisms as the sequential decay through the ground state of ^{8}Be, the direct decay with equal energies of three α particles, and the direct decay to the phase space uniformly, we have obtained the upper limit of 0.2% on the direct 3α decay.

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confidence: 58%

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confidence: 78%

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confidence: 79%

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confidence: 99%

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Further Improvement of the Upper Limit on the Direct3αDecay from the Hoyle State inC12

et al. 2014

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“…Moreover, events with increased kinetic energy dispersion in the 12 C center of mass, which amount to 9.5 ± 4%, point toward the occurrence of a second molecular configuration, a linear α-chain type. Different ratios have also been provided [14]. Beyond the excited 0 + 2 Hoyle state, evidence has been observed for a possible 2 + state at 9.6(1) MeV with a width of 600(100) keV [15].…”

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confidence: 94%

Potential barriers governing theC12formation and decay through quasimolecular shapes

Royer¹,

Escudie²,

Sublard³

2014

Phys. Rev. C

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The L-dependent potential barriers that govern the 8 Be and 12 C formation and decay through quasimolecular shapes have been determined using a generalized liquid-drop model and adjusted to reproduce the experimental Q value. For the ternary channel of 12 C, the energies of prolate linear chain configurations and oblate triangular configurations of three α particles have been compared. The triangular shape with three α nuclei in contact allows the experimental rms radius and the negative quadrupole moment of the 12 C ground state to be reproduced. The difference between the energies of the minima in the prolate and oblate ternary shape paths is very close to the energy of the excited Hoyle state of the 12 C nucleus.

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From the Stable to the Exotic: Clustering in Light Nuclei

Beck¹

2016

New Horizons in Fundamental Physics

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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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Estimation of direct components of the decay of the Hoyle state

Cited by 45 publications

References 28 publications

Further Improvement of the Upper Limit on the Direct3αDecay from the Hoyle State inC12

Further Improvement of the Upper Limit on the Direct3αDecay from the Hoyle State inC12

Potential barriers governing theC12formation and decay through quasimolecular shapes

From the Stable to the Exotic: Clustering in Light Nuclei

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