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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

We suggest that the number of correlated nucleon pairs in an arbitrary nucleus can be estimated by counting the number of proton-neutron, proton-proton, and neutron-neutron pairs residing in a relative $S$ state. We present numerical…

核理论 · 物理学 2012-10-24 Maarten Vanhalst , Wim Cosyn , Jan Ryckebusch

Recent developments in nuclear many-body theory enabled the description of open-shell medium-mass nuclei from first principles by exploiting the spontaneous breaking of symmetries within correlation expansion methods. Once combined with…

核理论 · 物理学 2024-07-25 A. Tichai , P. Demol , T. Duguet

A direct observation of nucleation of Ge hut clusters formed by ultrahigh vacuum molecular beam epitaxy is reported for the first time. The nuclei of the pyramidal and wedge-like clusters have been observed on the wetting layer blocks and…

介观与纳米尺度物理 · 物理学 2010-07-30 Larisa V. Arapkina , Vladimir A. Yuryev

Five N=82 isotones have been produced in two fusion-fission reactions and their gamma-rays studied with the Euroball array. The high-spin states of 139La have been identified for the first time, while the high-spin yrast and near-to-yrast…

Odd-odd 136Cs nuclei have been produced in the 18O + 208Pb and 12C + 238U fusion-fission reactions and their gamma rays studied with the Euroball array. The high-spin level scheme has been built up to ~ 4.7 MeV excitation energy and spin I…

We find 9 nuclear cluster candidates in a sample of 14 edge-on, late-type galaxies observed with HST/ACS. These clusters have magnitudes (M_I ~ -11) and sizes (r_eff ~ 3pc) similar to those found in previous studies of face-on, late-type…

天体物理学 · 物理学 2008-11-26 Anil C. Seth , Julianne J. Dalcanton , Paul W. Hodge , Victor P. Debattista

After a short historical (and highly subjective) introduction to the field, I discuss our current understanding of the origin and evolution of the light nuclides D, He-3, He-4, Li-6, Li-7, Be-9, B-10 and B-11. Despite considerable…

天体物理学 · 物理学 2009-11-13 Nikos Prantzos

Characterization of the participant-zone (PZ) in the $^{129,124}$Xe + $^{112,124}$Sn reaction at the energy range 65-150 MeV/nucleon reveals copious cluster production. A detailed study of the chemical composition as a function of the…

核实验 · 物理学 2024-10-16 T. Genard , A. Chbihi , C. Ciampi , D. Durand , Q. Fable , A. LeFevre , S. Mallik

We systematically investigate the relation between the nuclear structure and reaction in the $^{10}$Be nucleus using a theoretical framework. The structure of the $^{10}$Be nucleus is constructed with a cluster model based on a microscopic…

核理论 · 物理学 2023-06-28 T. Furumoto , T. Suhara , N. Itagaki

We investigate the nature of 14 embedded clusters (ECs) related to a group of four H II regions Sh2-235, Sh2-233, Sh2-232, and Sh2-231 in the giant molecular cloud G174 + 2.5. Projected towards the Galactic anticentre, these objects are a…

星系天体物理 · 物理学 2012-04-11 D. Camargo , C. Bonatto , E. Bica

The many-body states in an extended Fermionic Molecular Dynamics approach are flexible enough to allow the description of nuclei with shell model nature as well as nuclei with cluster and halo structures. Different many-body configurations…

核理论 · 物理学 2009-11-10 T. Neff , H. Feldmeier

A new paradigm for nuclear structure that includes blocking effects of tensor interactions is proposed. All of the recently discovered magic numbers (N=6, 14, 16, 32 and 34) in neutron-rich nuclei can be explained by the blocking effects. A…

核理论 · 物理学 2019-07-19 I. Tanihata , H. Toki , S. Terashima , H. -J. Ong

Nucleonic matter displays a quantum liquid structure, but in some cases finite nuclei behave like molecules composed of clusters of protons and neutrons. Clustering is a recurrent feature in light nuclei, from beryllium to nickel. For…

核理论 · 物理学 2015-06-04 J. -P Ebran , E. Khan , T. Niksic , D. Vretenar

It was recently found that excited states of semi-vortex and mixed-mode solitons are unstable in spin-orbit-coupled Bose-Einstein condensates (BECs) with contact interactions. We demonstrate a possibility to stabilize such excited states in…

量子气体 · 物理学 2018-02-07 Chunqing Huang , Yuebo Ye , Shimei Liu , Hexiang He , Wei Pang , B. A. Malomed , Yongyao Li

We investigate the use of proton-nucleus elastic scattering experiments using secondary beams of 6He and 8He to determine the physical structure of these nuclei. The sensitivity of these experiments to nuclear structure is examined by using…

核理论 · 物理学 2009-11-06 Stephen P. Weppner , Charlotte Elster , Ofir Garcia

Synthesis of new elements at the upper border of the charts of nuclei and investigation of their decay properties and nuclear structure has been one of the main research topics in low energy nuclear physics since more than five decades.…

核实验 · 物理学 2022-04-28 Fritz Peter Hessberger

We investigate the structure of 13-particle clusters in binary alloys for various size ratios and different concentrations via MD simulation. Our goal is to predict which systems are likely to form local icosahedral structures when rapidly…

凝聚态物理 · 物理学 2007-05-23 Stefano Cozzini , Marco Ronchetti

Strong residual correlations between neutrons and protons in N ~ Z systems can lead to unusual structure. Using the spherical shell model, we show that a low-excitation shape isomer can occur in the odd-odd N=Z nucleus 66As. This extends…

核理论 · 物理学 2009-11-11 M. Hasegawa , Y. Sun , K. Kaneko , T. Mizusaki

Dilute multi $\alpha$ cluster condensed states with spherical and axially deformed shapes are studied with the Gross-Pitaevskii equation and Hill-Wheeler equation, where the $\alpha$ cluster is treated as a structureless boson. Applications…

核理论 · 物理学 2009-11-10 Taiichi Yamada , Peter Schuck