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相关论文: Unveiling potential neutron halos in intermediate-…

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The range corrections to the universal properties and structure of two-neutron halo nuclei are investigated within an effective quantum mechanics framework. Treating the nucleus as an effective three-body system, we make a systematic…

核理论 · 物理学 2015-05-14 David L. Canham , H. -W. Hammer

We study the two-neutron correlations in the ground state of the weakly-bound two-neutron halo nucleus $^{22}$C sitting at the edge of the neutron-drip line and also in the unbound nucleus $^{26}$O sitting beyond the neutron dripline. For…

核理论 · 物理学 2020-08-26 Jagjit Singh , W. Horiuchi , L. Fortunato , A. Vitturi

Using halo effective field theory (EFT), an expansion in $R_{core}/R_{halo}$, where $R_{core}$ is the radius of the core and $R_{halo}$ the radius of the halo nucleus, we calculate the charge and neutron form factors of the two-neutron halo…

核理论 · 物理学 2017-02-22 Jared Vanasse

A thick neutron skin emerges from the first determination of root mean square radii of the proton distributions for $^{17-22}$N from charge changing cross section measurements around 900$A$ MeV at GSI. Neutron halo effects are signaled for…

I discuss recent work our group has undertaken on effective-field-theory analyses of experimental data pertaining to one- and two-neutron halo nuclei.

核理论 · 物理学 2013-12-31 Daniel R. Phillips

We investigate neutron stars that contain a unified dark sector composed of cold, degenerate fermionic dark matter and a vacuum-like dark-energy component. Within a general-relativistic two-fluid framework that allows a covariantly…

高能天体物理现象 · 物理学 2026-05-14 Loreany F. Araújo , Germán Lugones , José Ademir S. Lima

Halo phenomena have long been an important frontier in both experimental and theoretical nuclear physics. $^{37}$Mg was identified as a halo nucleus in 2014 and remains the heaviest nuclear halo system to date. While the halo phenomenon in…

核理论 · 物理学 2023-08-10 K. Y. Zhang , S. Q. Yang , J. L. An , S. S. Zhang , P. Papakonstantinou , M. -H. Mun , Y. Kim , H. Yan

A fully antisymmetrized microscopic model is developed for light two-neutron halo nuclei using a hyper-spherical basis to describe halo regions. The many-body wavefunction is optimized variationally. The model is applied to 6He bound by…

核理论 · 物理学 2014-11-21 I. Brida , F. M. Nunes

The universal properties and structure of halo nuclei composed of two neutrons (2n) and a core are investigated within an effective quantum mechanics framework. We construct an effective interaction potential that exploits the separation of…

核理论 · 物理学 2008-11-26 David L. Canham , H. -W. Hammer

Although high-resolution N-body simulations make robust empirical predictions for the density distribution within cold dark matter halos, these studies have yielded little physical insight into the origins of the distribution. We…

天体物理学 · 物理学 2008-11-26 Liliya L. R. Williams , Arif Babul , Julianne J. Dalcanton

The halo factor is one of the experimental data which describes a distribution of neutrons in nuclear periphery. In the presented paper we use Skyrme-Hartree (SH) and the Relativistic Mean Field (RMF) models and we calculate the neutron…

核理论 · 物理学 2009-11-10 A. Baran , P. Mierzynski

Paring correlations in weakly bound nuclei on the edge of neutron drip line is studied by using a three-body model. A density-dependent contact interaction is employed to calculate the ground state of halo nuclei $^{6}$He and $^{11}$Li, as…

核理论 · 物理学 2009-11-11 K. Hagino , H. Sagawa

The neutron skin and halo distributions in medium and heavy nuclei are calculated within the extended Thomas-Fermi approximation. Calculations are carried out for the effective Skyrme-like forces using the direct variational method. The…

核理论 · 物理学 2018-12-18 S. V. Lukyanov , A. I. Sanzhur

We have performed shell-model calculations for nuclei with proton particles and neutron holes around 132Sn using a realistic effective interaction derived from the CD-Bonn nucleon-nucleon potential. For the proton-neutron channel this is…

核理论 · 物理学 2009-11-07 L. Coraggio , A. Covello , A. Gargano , N. Itaco , T. T. S. Kuo

Two-proton radioactivity with 2p halo is reported theoretically in light mass nuclei A $=$ 18-34. We predict $^{19}$Mg, $^{22}$Si, $^{26}$S, $^{30}$Ar and $^{34}$Ca as promising candidates of ground state 2p-radioactivity with S$_{2p}$ $<$…

核理论 · 物理学 2017-10-31 G. Saxena , M. Kumawat , M. Kaushik , S. K. Jain , Mamta Aggarwal

In the hierarchical structure formation model cosmic halos are supposed to form by accretion of smaller units along anisotropic direction, defined by large-scale filamentary structures. After the epoch of primary mass aggregation (which…

天体物理学 · 物理学 2015-06-24 Manolis Plionis , Cinthia Ragone , Spyros Basilakos

We use N-body simulations to investigate the structure of dark halos in the standard Cold Dark Matter cosmogony. Halos are excised from simulations of cosmologically representative regions and are resimulated individually at high…

天体物理学 · 物理学 2008-11-26 Julio F. Navarro , Carlos S. Frenk , Simon D. M. White

Halo phenomenon in deformed nuclei is studied by using a fully self-consistent deformed relativistic Hartree-Bogoliubov model in a spherical Woods-Saxon basis with the proper asymptotic behavior at large distance from the nuclear center.…

核理论 · 物理学 2015-03-17 Shan-Gui Zhou , Jie Meng , P. Ring , En-Guang Zhao

The abundance of massive dark matter halos hosting galaxy clusters provides an important test of the masses of relic neutrino species. The dominant effect of neutrino mass is to lower the typical amplitude of density perturbations that…

宇宙学与河外天体物理 · 物理学 2014-11-03 Marilena LoVerde

We investigated the evolution of shell structure at $N=32$ and 34 in neutron-rich nuclei beyond the stability line using realistic nuclear forces, employing the state-of-the-art valence-space in-medium similarity renormalization group…

核理论 · 物理学 2025-08-06 Subhrajit Sahoo , Praveen C. Srivastava