Systematic study of new data for extreme<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>α</mml:mi></mml:math>decays

Qian, Yibin; Ren, Zhongzhou

doi:10.1103/physrevc.84.064307

Cited by 32 publications

(23 citation statements)

References 64 publications

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“…The electron pumping experiments have been performed in various semiconductor-based nanoscale devices [2][3][4]. More recently, the topological charge pump was realized in ultracold atoms in optical superlattices [5][6][7], and it was also extensively studied in theory [8][9][10][11][12][13][14][15].…”

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confidence: 99%

Topological charge pumping by a sliding moiré pattern

2020

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We study the adiabatic topological charge pumping driven by interlayer sliding in the moiré superlattices. We show that, when we slide a single layer of the twisted bilayer system relatively to the other, a moiré pattern flow and a quantized transport of electrons occurs. When the Fermi energy is in a spectral gap, the number of pumped charges in the interlayer sliding process is quantized to a sliding Chern number, which obeys a Diophantine equation analogous to the quantum Hall effect. We apply the argument to the twisted bilayer graphene, and find that energy gaps above and below the nearly-flat bands has non-zero sliding Chern numbers. When the Fermi energy is in either of those gaps, the slide-driven topological pumping occurs perpendicularly to the sliding direction.

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confidence: 99%

Topological charge pumping by a sliding moiré pattern

2020

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“…It should be indicated that the present calculations focus on spherical proton emitters, in order to pursue a unified framework with the calculations of cluster radioactivity. In fact, the accumulation of experimental data on spherical proton emitters appears to be more in contrast with that for deformed ones, and it is also straightforward to involve the deformation effect in the investigation [26,27]. We would like to consider this study as a first attempt and process the extension to the deformed case in our following work.…”

Section: Introductionmentioning

confidence: 91%

“…[19,27,29] and references therein). One then numerically solves the Schrödinger equation within U (r) to obtain the bound-state wave function, where the depth of the nuclear potential, λ, is determined for each decay to make the bound state characterized by the measured decay energy Q and the Wildermuth condition [19,30].…”

Section: Theoretical Frameworkmentioning

confidence: 97%

“…This rule takes into account the main effect of the Pauli exclusion principle. Once the decay width is obtained according to the two-potential approach [19,27,29], the half-life of cluster radioactivity is then related as…”

Section: Theoretical Frameworkmentioning

confidence: 99%

“…The other interesting objective of the present article is to deduce the rms nuclear charge radii of exotic nuclei with short lifetimes around the proton dripline from the experimental energies and half-lives of proton emission. Previously, we have successfully combined the modified two-potential approach (MTPA) with the density-dependent cluster model so as to perform systematic investigation on the tunneling problem [15,19,27]. This model naturally involves the density distribution of studied nuclei in the calculation of half-lives of cluster radioactivity and proton emission.…”

Section: Introductionmentioning

confidence: 99%

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Attempt to probe nuclear charge radii by cluster and proton emissions

Qian

Ren

2013

Phys. Rev. C

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We deduce the rms nuclear charge radii for ground states of light and medium-mass nuclei from experimental data of cluster radioactivity and proton emission in a unified framework. On the basis of the density-dependent cluster model, the calculated decay half-lives are obtained within the modified two-potential approach. The charge distribution of emitted clusters in the cluster decay and that of daughter nuclei in the proton emission are determined to correspondingly reproduce the experimental half-lives within the folding model. The obtained charge distribution is then employed to give the rms charge radius of the studied nuclei. Satisfactory agreement between theory and experiment is achieved for available experimental data, and the present results are found to be consistent with theoretical estimations. This study is expected to be helpful in the future detection of nuclear sizes, especially for these exotic nuclei near the proton dripline.

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Investigation of deformation effects on the decay properties of12C+αCluster states in 16 O

et al. 2018

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We have analyzed the elastic scattering angular distributions data of the α+ 12 C reaction over a wide energy range (E lab =28.2 to 35.5 MeV) within the framework of the Optical Model formalism. A double folding (DF) type real potential was used with a phenomenological Woods-Saxon-squared (WS2) type imaginary potential. Good agreement between the calculations and experimental data was obtained. By using the real DF potential we have calculated the properties of the α-cluster states in 16 O by using the Gamow code as well as the α-decay widths by using the WKB method. We implemented a 12 C+α cluster framework for the calculation of the excitation energies and decay widths of 16 O as a function of the orientation of the planar 12 C nucleus with respect to the α-particle. These calculations showed strong sensitivity of the widths and excitation energies to the orientation. Branching ratios were also calculated and though less sensitive to the 12 C orientation, it was found that 12 C gs +α structure, with the α-particle orbiting the 12 C in its ground state, is dominant. This work demonstrates that deformation, and the orientation, of 12 C at plays a crucial role in the understanding the nature of the α-cluster states in 16 O.

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Systematic study of new data for extremeαdecays

Cited by 32 publications

References 64 publications

Topological charge pumping by a sliding moiré pattern

Topological charge pumping by a sliding moiré pattern

Attempt to probe nuclear charge radii by cluster and proton emissions

Investigation of deformation effects on the decay properties of12C+αCluster states in 16 O

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