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$0s$-orbit $\Lambda$ states in $p$-shell double-$\Lambda$ hypernuclei ($^{\ \,A}_{\Lambda\Lambda}Z$), $^{\ \,8}_{\Lambda\Lambda}\textrm{Li}$, $^{\ \,9}_{\Lambda\Lambda}\textrm{Li}$, $^{10,11,12}_{\ \ \ \ \ \Lambda\Lambda}\textrm{Be}$,…

核理论 · 物理学 2018-04-04 Yoshiko Kanada-En'yo

Energy spectra of $0s$-orbit $\Lambda$ states in $p$-shell $\Lambda$ hypernuclei ($^{A}_\Lambda Z$) and those in $^{19}_{\Lambda}\textrm{F}$ are studied with the microscopic cluster model and antisymmetrized molecular dynamics using the…

核理论 · 物理学 2018-03-13 Yoshiko Kanada-En'yo , Masahiro Isaka , Toshio Motoba

We investigate the hypernuclear cluster states of $_\Lambda^{12}\mathrm{B}$ using a neural-network-driven microscopic model. We extend the Control Neural Networks (Ctrl.NN) method and systematically calculate the positive-parity spectrum of…

$\Lambda N$ spin-spin and spin-orbit splittings in low-lying excitation spectra are investigated for $p$-shell $\Lambda$ hypernuclei on the basis of the microscopic structure calculation within the antisymmetrized molecular dynamics, where…

核理论 · 物理学 2020-02-19 Masahiro Isaka , Yasuo Yamamoto , Toshio Motoba

We perform three-body model calculations for a $sd$-shell hypernucleus $^{19}_{\Lambda}$F ($^{17}_{\Lambda}{\rm O}+p+n$) and its core nucleus $^{18}$F ($^{16}{\rm O}+p+n$), employing a density-dependent contact interaction between the…

核理论 · 物理学 2015-06-11 Y. Tanimura , K. Hagino , H. Sagawa

We calculated the energy spectra of the neutron-rich He $\Lambda$ hypernuclei with $A=6$ to 9 within the framework of an $\alpha + \Lambda +Xn$ ($X=1$--4) cluster model using the cluster orbital shell model. The employed constituent…

核理论 · 物理学 2023-05-05 Takayuki Myo , Emiko Hiyama

The structure of the isodoublet hypernuclei, $^{10}_{\Lambda}$B and $^{10}_{\Lambda}$Be within the framework of an $\alpha +\alpha +\Lambda +N$ four-body cluster model is studied. Interactions between the constituent subunits are determined…

核理论 · 物理学 2012-08-03 Emiko Hiyama , Yasuo Yamamoto

A microscopic description of nuclei is important to understand the nuclear shell-model from fundamental principles. This is difficult to achieve for more than the lightest nuclei without an effective approximation scheme. The purpose of…

核理论 · 物理学 2013-08-19 Gustav R. Jansen

The low-lying structure of $^{10}_\Lambda$Be and $^{11}_\Lambda$Be are investigated within the framework of the antisymmetrized molecular dynamics. We focus on the modifications of the excitation spectra and dynamical changes of the…

核理论 · 物理学 2015-06-29 Masahiro Isaka , Masaaki Kimura

In order to clarify the nature of hypernuclear low-lying states, we carry out a comprehensive study for the structure of $^{144-154}_{~~~~~~~~\Lambda}$Sm-hypernuclei, which exhibit a transition from vibrational to rotational characters as…

核理论 · 物理学 2017-07-19 H. Mei , K. Hagino , J. M. Yao , T. Motoba

The effect of the two-nucleon excitation from $p$ to $sd$ shell is discussed in $^{12}$C and $^{14}$C in the frame work of shell model. The recently suggested shell-model Hamiltonian YSOX provides an suitable tool to investigate the…

核理论 · 物理学 2016-02-02 Cenxi Yuan , Min Zhang , Nianwu Lan , Youjun Fang

We investigate the structure of the neutron-rich $\Lambda$-hypernucleus $_{\Lambda}^{10}$Li by using microscopic shell-model calculations considering a $\Lambda$-$\Sigma$ coupling effect. The calculated $\Sigma$-mixing probability in the…

核理论 · 物理学 2009-03-04 A. Umeya , T. Harada

It has been shown experimentally that the $^6$Li nucleus shrinks by adding a $\Lambda$ particle while its spectrum is also compressed. We discuss the compatibility of these two effects, contrasting also with a relation between the shrinkage…

核理论 · 物理学 2015-06-03 K. Hagino , T. Koike

The structural evolution of the heavy nuclei, with Z > 82, is investigated by looking at the differential variation of the two-neutron separation energies. It indicates, by non-monotonous behavior at certain neutron numbers, structure…

核实验 · 物理学 2015-06-17 D. Bucurescu , N. V. Zamfir

An extended version of the antisymmetrized molecular dynamics to study structure of $p$-$sd$ shell hypernuclei is developed. By using an effective $\Lambda N$ interaction, we investigate energy curves of $^9_\Lambda$Be, $^{13}_\Lambda$C and…

核理论 · 物理学 2011-05-13 Masahiro Isaka , Masaaki Kimura , Akinobu Dote , Akira Ohnishi

The dynamical influence of $\Lambda$ hyperons on the excited-state properties of closed-shell multi-$\Lambda$ Ca, Ni, Sn and Pb hypernuclei is investigated using the self-consistent Hartree-Fock + Random Phase Approximation in coordinate…

核理论 · 物理学 2026-03-26 Bahruz Suleymanli , Kutsal Bozkurt , Elias Khan , Haşim Güven , Jerome Margueron

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 structure of single-$\Lambda$ hypernuclei is studied using the chiral hyperon-nucleon potentials derived at leading order (LO) and next-to-leading order (NLO) by the J\"{u}lich--Bonn--Munich group. Results for the separation energies of…

核理论 · 物理学 2020-03-18 Johann Haidenbauer , Isaac Vidana

Cross-section and analyzing power data from 197 MeV $(p,p')$ scattering and longitudinal and transverse form factors for electron scattering to low lying states in $^{10}$B have been analyzed as tests of the structure of the nuclear states…

核理论 · 物理学 2015-05-13 K. Amos , S. Karataglidis , Y. J. Kim

The problem of the transition of electron shells of atoms to excited states in the process of neutrinoless double-$\beta$ decay is investigated. This subject is crucial for modeling the energy spectrum of $\beta$-electrons, which is…

高能物理 - 唯象学 · 物理学 2023-11-13 M. I. Krivoruchenko , K. S. Tyrin , F. F. Karpeshin
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