Candidate superdeformed band in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>28</mml:mn></mml:msup></mml:math>Si

Jenkins, D. G.; Lister, C. J.; Carpenter, M. P.; Chowdury, P.; Hammond, N. J.; Janssens, R. V. F.; Khoo, T. L.; Lauritsen, T.; Seweryniak, D.; Davinson, T.; Jokinen, A.; Penttilä, H.; Haas, F.; Courtin, S.

doi:10.1103/physrevc.86.064308

Cited by 44 publications

(55 citation statements)

References 37 publications

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“…Two-dimensional alpha cluster model predicts very exotic and highly-deformed configurations in this nucleus [23]. Second, in this mass region the superdeformation has already been observed in the 40 Ca ( [22,24]), 36 Ar ( [25,26]), 35 Cl ( [27]), 40 Ar ( [28]) and probably 28 Si [29] nuclei. Moreover, the SD bands have been seen up to very high spin of I = 16 in some of these nuclei.…”

Section: Introductionmentioning

confidence: 67%

From superdeformation to extreme deformation and clusterization in theN≈Znuclei of theA≈40mass region

Ray¹,

Afanasjev²

2016

Phys. Rev. C

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From superdeformation to extreme deformation and clusterization in the N ∼ Z nuclei of the A ∼ 40 mass region. A systematic search for extremely deformed structures in the N ∼ Z nuclei of the A ∼ 40 mass region has been performed for the first time in the framework of covariant density functional theory. At spin zero such structures are located at high excitation energies which prevents their experimental observation. The rotation acts as a tool to bring these exotic shapes to the yrast line or its vicinity so that their observation could become possible with future generation of γ−tracking (or similar) detectors such as GRETA and AGATA. The major physical observables of such structures (such as transition quadrupole moments as well as kinematic and dynamic moments of inertia), the underlying single-particle structure and the spins at which they become yrast or near yrast are defined. The search for the fingerprints of clusterization and molecular structures is performed and the configurations with such features are discussed. The best candidates for observation of extremely deformed structures are identified. For several nuclei in this study (such as 36 Ar), the addition of several spin units above currently measured maximum spin of 16 will inevitably trigger the transition to hyper-and megadeformed nuclear shapes.

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Section: Introductionmentioning

confidence: 67%

From superdeformation to extreme deformation and clusterization in theN≈Znuclei of theA≈40mass region

Ray¹,

Afanasjev²

2016

Phys. Rev. C

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“…24 Mg + α (T), 20 Ne + 8 Be, 16 O + 12 C, 24 Mg + α (A) doublets and in the β band. The numbers in parentheses are the experimental data [17].…”

Section: Overview Of the Spectrummentioning

confidence: 99%

“…On the other hand, the experimental assignments of the negative-parity bands and high-lying bands are not established yet, and hence, the assignment of the cluster bands is still ambiguous. Many experiments have been performed to identify the cluster bands [17][18][19][20][21][22][23], and Fig. 6 shows the candidates of the cluster bands reported in Refs.…”

Section: Systematics Of Clustering and Observed Candidatesmentioning

confidence: 99%

Inversion doublets of reflection-asymmetric clustering in Si28 and their isoscalar monopole and dipole transitions

2017

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Background: Various cluster states of astrophysical interest are expected to exist in the excited states of 28 Si. However, they have not been identified firmly, because of the experimental and theoretical difficulties. Purpose: To establish the 24 Mg + α, 16 O + 12 C, and 20 Ne + 2α cluster bands, we theoretically search for the negative-parity cluster bands that are paired with the positive-parity bands to constitute the inversion doublets. We also offer the isoscalar monopole and dipole transitions as a promising probe for the clustering. We numerically show that these transition strengths from the ground state to the cluster states are very much enhanced.

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“…The ignition of type Ia supernovae is carbon and oxygen burning, and this strongly influences the abundance of elements in the 14 < ∼ Z < ∼ 20 region [1]. If they exist, 12 C + 16 O molecular resonances close to the Gamow window increase the cross-section in order of magnitude. Therefore, searching for molecular resonances and determining their resonance parameters are of primary importance for understanding of the reaction rate.…”

mentioning

confidence: 99%

“…The ket state is the wave function of 28 Si calculated by AMD. Here, Φ12 C and Φ16 O are the (0s) 4 (0p 3/2 ) 8 [18] and (0s) 4 (0p) 12 configurations of the harmonic oscillator potential, respectively. In practical calculation, Eq.…”

mentioning

confidence: 99%

C12+16O molecular resonances at deep sub-barrier energy

Taniguchi

Kimura

2020

Physics Letters B

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The existence of 12 C + 16 O molecular resonances at sub-barrier energy has been a significant problem in nuclear astrophysics because they strongly affect the 12 C + 16 O fusion reaction rate in type Ia supernovae and heavy stars. However, experimental surveys have been limited to 4 MeV and cannot access the deep sub-barrier energy due to a very small fusion cross section. Here we predict a couple of resonances with J π = 0 + , 2 + , and 4 + in the deep sub-barrier energy based on the antisymmetrized molecular dynamics calculation that reproduces the known resonances and low-lying spectrum of 28 Si.

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Candidate superdeformed band in28Si

Cited by 44 publications

References 37 publications

From superdeformation to extreme deformation and clusterization in theN≈Znuclei of theA≈40mass region

From superdeformation to extreme deformation and clusterization in theN≈Znuclei of theA≈40mass region

Inversion doublets of reflection-asymmetric clustering in Si28 and their isoscalar monopole and dipole transitions

C12+16O molecular resonances at deep sub-barrier energy

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