α-cluster structure of 
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Barbui, M.; Volya, Alexander; Aboud, E.; Ahn, Sang Chul; Bishop, J.; Goldberg, V. Z.; Hooker, J.; Hunt, Curtis; Jayatissa, H.; Kokalova, Tz.; Koshchiy, E.; Pirrie, S.; Pollacco, E.; Roeder, B. T.; Saastamoinen, A.; Upadhyayula, S.; Wheldon, C.; Rogachev, G. V.

doi:10.1103/physrevc.106.054310

Cited by 5 publications

(3 citation statements)

References 40 publications

(190 reference statements)

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“…Recent experimental studies of clustering in non-self-conjugate nuclei already produced exciting results, such as hints for linear chain structures stabilized by "extra" nucleons (e.g. [6][7][8]) and indications for super-radiance [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…Of particular interest is the nucleus 13 N where three α clusters and an "extra" proton can form exotic cluster configurations. Resonant 9 B+α scattering or α-transfer reactions are not possible because 9 B is proton unbound with a half life of the order of 10 −18 s. Instead, one may use β-delayed charged-particle spectroscopy to populate states in 13 N via 13 O and observe the decays to a final state of 3αp. The β-delayed proton channel has previously been studied for 13 O [11] where limited statistics showed only a very small sensitivity to populating the p+ 12 C(0 + 2 ) (Hoyle state) which results in a 3α+p final state.…”

Section: Introductionmentioning

confidence: 99%

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First observation of the $β$3$α$p decay of $^{13}\mathrm{O}$ via $β$-delayed charged-particle spectroscopy

Bishop¹,

Rogachev²,

Ahn³

et al. 2023

Preprint

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Background: The β-delayed proton-decay of 13 O has previously been studied, but the direct observation of β-delayed 3αp decay has not been reported.Purpose: Rare 3αp events from the decay of excited states in 13 N provide a sensitive probe of cluster configurations in 13 N.Method: To measure the low-energy products following β-delayed 3αp-decay, the TexAT Time Projection Chamber was employed using the one-at-a-time β-delayed charged-particle spectroscopy technique at the Cyclotron Institute, Texas A&M University.Results: A total of 1.9 × 10 5 13 O implantations were made inside the TexAT Time Projection Chamber. 149 3αp events were observed yielding a β-delayed 3αp branching ratio of 0.078(6)%. Conclusion:Four previously unknown α-decaying excited states were observed in 13 N at 11.3 MeV, 12.4 MeV, 13.1 MeV and 13.7 MeV and the decay modes for these states were established. We demonstrate that clustering must dominate the structure of these states to exhibit the observed decay branching ratios.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

First observation of the $β$3$α$p decay of $^{13}\mathrm{O}$ via $β$-delayed charged-particle spectroscopy

Bishop¹,

Rogachev²,

Ahn³

et al. 2023

Preprint

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show abstract

“…In GCM calculations for nuclear spectroscopy, it is well known that the non-orthogonality of a basis set often leads to a numerical instability [12,18]. One can largely avoid this problem in reaction calculations because a rather coarse mesh along the fission path provides an acceptable accuracy for estimating the transmission coefficients [10].…”

Section: Introductionmentioning

confidence: 99%

Schematic model for induced fission in a configuration-interaction approach

Uzawa,

Hagino

2023

Phys. Rev. C

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We model fission at barrier-top energies in a simplified model space that permits comparison of different components of the residual nucleon-nucleon interaction. The model space is built on particle-hole excitations of reference configurations. These are Slater determinants of uniformly spaced orbitals characterized only by their quantum numbers and orbital energies. The residual interaction in the Hamiltonian includes the diabatic interaction connecting similar orbitals at different deformations, the pairing interaction between like nucleons, and a schematic off-diagonal neutron-proton interaction. We find that the fission reaction probability is sensitive to the off-diagonal neutron-proton interaction much more than to the pairing and the diabatic interactions. In particular, the transmission coefficients become insensitive to the strength of the pairing interaction when the neutron-proton interaction is large. We also find that the branching ratio is insensitive to the final-state scission dynamics, as is assumed in the well-known Bohr-Wheeler theory.

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Clusters in light nuclei: history and recent developments

Lombardo,

Dell’Aquila

2023

Riv. Nuovo Cim.

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In this review, we discuss recent advancements in the study of clustering phenomena occurring in light nuclei, and their influence on nuclear structure, dynamics, and astrophysics. In the introduction, we outline the historical steps leading to the concept of $$\alpha $$ α -clusterization in nuclei and provide a comprehensive description of the evolution of nuclear models capable to describe clustering aspects in nuclear systems and of the main experiments and discoveries leading to the development of this research field. We also describe some spectroscopic techniques that are used to establish the clustered nature of a given nuclear state. Some relevant experimental and theoretical findings recently reported both in experimental and theoretical works are discussed in the text. We put emphasis on recent achievements and remaining problems in the description of the structure of light isotopes, from helium to neon, including both self- and non-self-conjugate nuclei. Particular attention to the implication in the nuclear astrophysics context and to clustering effects in the dynamics of nuclear reactions is pursued all along the review.

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α-cluster structure of Ne18

Cited by 5 publications

References 40 publications

First observation of the $β$3$α$p decay of $^{13}\mathrm{O}$ via $β$-delayed charged-particle spectroscopy

First observation of the $β$3$α$p decay of $^{13}\mathrm{O}$ via $β$-delayed charged-particle spectroscopy

Schematic model for induced fission in a configuration-interaction approach

Clusters in light nuclei: history and recent developments

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