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相关论文: Low-lying continuum structures in B8 and Li8 in a …

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Our current understanding of the structure of nuclei with up to A=8, including energy spectra, electromagnetic form factors, and weak transitions, is reviewed within the context of a realistic approach to nuclear dynamics based on two- and…

核理论 · 物理学 2017-08-23 R. Schiavilla

In present work, we perform a coupled-channel analysis of $B^{(*)}_{(s)}\bar{B}^{(*)}_{(s)}$ systems with the one-boson-exchange potentials. We first study the $I(J^{PC})=1(1^{+-})$ $B\bar{B}^{*}/B^{*}\bar{B}^{*}$ system to describe the…

高能物理 - 唯象学 · 物理学 2024-10-02 Qing-Fu Song , Qi-Fang Lü , Dian-Yong Chen , Yu-Bing Dong

The He3(He3,2p)He4 and H3(H3,2n)He4 reactions are studied in a microscopic cluster model. We search for resonances in the He3+He3 and He4+p+p channels using methods that treat the two- and three-body resonance asymptotics correctly. Our…

核理论 · 物理学 2009-10-31 Attila Csoto , Karlheinz Langanke

The 2$\alpha+t$ cluster structure in $^{11}$B is investigated by the microscopic generator coordinate method (GCM) with the Brink cluster wave functions. With a proper choice of the parameters of the effective interaction, the calculated…

核理论 · 物理学 2018-12-05 Bo Zhou , Masaaki Kimura

The presence of cluster-like narrow resonances in the vicinity of reaction/decay thresholds is a ubiquitous phenomenon with profound consequences. We argue that the continuum coupling, present in the open quantum system description of the…

核理论 · 物理学 2020-02-05 J. Okołowicz , M. Płoszajczak , W. Nazarewicz

The generator coordinate method of a microscopic cluster model is developed to treat the resonance and scattering of nuclear clusters with complex scaling. We consistently derive the formulation of the complex scaling for the microscopic…

核理论 · 物理学 2023-06-19 Takayuki Myo , Hiroki Takemoto

We present a detailed formalism of the microscopic particle-rotor model for hypernuclear low-lying states based on a covariant density functional theory. In this method, the hypernuclear states are constructed by coupling a hyperon to…

核理论 · 物理学 2015-04-21 H. Mei , K. Hagino , J. M. Yao , T. Motoba

We calculate several "size-like" B-8 observables within the microscopic three-cluster model and study their potential constraints on the zero-energy astrophysical S_{17}(0) factor of the Be7(p,gamma)B8 reaction. We find within our…

核理论 · 物理学 2009-10-31 Attila Csoto , Karlheinz Langanke

We place unprecedented constraints on recoil corrections in the $\beta$ decay of $^8$Li, by identifying a strong correlation between them and the $^8$Li ground state quadrupole moment in large-scale ab initio calculations. The results are…

The 11Li + p and 11Li + d reactions are investigated in the Continuum Discretized Coupled Channel (CDCC) method with a three-body description (9Li + n + n) of 11Li. I first discuss the properties of 11Li, and focus on E1 transition…

核理论 · 物理学 2020-07-15 Pierre Descouvemont

There is a significant discrepancy between the current theoretical prediction of the cosmological lithium abundance, mostly produced as Be7 during the Big Bang, and its observationally inferred value. We investigate whether the resonant…

宇宙学与河外天体物理 · 物理学 2015-05-13 Richard H. Cyburt , Maxim Pospelov

The structure of $^8$He is investigated within a three-cluster microscopic model. The three-cluster configuration $\alpha+^2n+^2n$ was used to describe the properties of the ground state of the nucleus. The obtained results evidently…

核理论 · 物理学 2009-11-06 A. V. Nesterov , V. S. Vasilevsky , O. F. Chernov

This study is focused on the break-up and electromagnetic response of light weakly-bound dicluster nuclei. The cluster picture in the case of $ ^7$Li is shown to be a very good approximation and in this framework we calculate nuclear…

核理论 · 物理学 2009-11-07 Lorenzo Fortunato

How does the scattering cross section change when the colliding bound-state fragments are allowed particle-emitting resonances? This question is explored in the framework of a multi-channel algebraic scattering method of determining…

核理论 · 物理学 2009-01-09 P. Fraser , K. Amos , L. Canton , G. Pisent , S. Karataglidis , J. P. Svenne , D. van der Knijff

The $^9$C nucleus and related capture reaction, ${^8\mathrm{B}}(p,\gamma){^9\mathrm{C}}$, have been intensively studied with an astrophysical interest. Due to the weakly-bound nature of $^9$C, its structure is likely to be described as the…

核理论 · 物理学 2021-09-14 Jagjit Singh , Takuma Matsumoto , Tokuro Fukui , Kazuyuki Ogata

The strangeness $s=+1$ pentaquark states as $qqqq\bar{q}$ clusters are investigated in this letter. Starting from the inherent geometric symmetry, we analyzed the inherent nodal structure of the system. As the nodeless states, the low-lying…

高能物理 - 唯象学 · 物理学 2009-11-10 Yu-xin Liu , Jing-sheng Li , Cheng-guang Bao

We investigate properties of bound and resonance states in the $_{\Lambda}^{9}$Be nucleus. To reveal the nature of these states, we use a three-cluster $2\alpha+\Lambda$ microscopic model. The model incorporates Gaussian and oscillator…

核理论 · 物理学 2021-04-22 Yu. A. Lashko , A. V. Nesterov , V. S. Vasilevsky

The level structure of the very neutron rich and unbound $^9$He nucleus has been the subject of significant experimental and theoretical study. Many recent works have claimed that the two lowest energy $^9$He states exist with spins…

The extremely neutron-rich system $^{7}$H was studied in the direct $^2$H($^8$He,$^3$He)$^7$H transfer reaction with a 26 AMeV secondary $^{8}$He beam [Bezbakh et al., Phys. Rev. Lett. 124 (2020) 022502]. The missing mass spectrum and…

The unstable nucleus $^8$Be, with its two $\alpha$-cluster configuration, is the doorway to the formation of heavier $\alpha$-cluster nuclei. Most importantly, its the precursor of the production of $^{12}$C through the Hoyle state, a…

核理论 · 物理学 2022-10-12 Suprita Chakraborty , Rajkumar Santra , Subinit Roy , V. M. Datar