World Laboratory

Erice, Italy

World Laboratory

Erice, Italy

Time filter

Source Type

Fu G.J.,Shanghai JiaoTong University | Lei Y.,Shanghai JiaoTong University | Jiang H.,Shanghai JiaoTong University | Jiang H.,Shanghai Maritime University | And 6 more authors.
Physical Review C - Nuclear Physics | Year: 2011

In this paper we study the residual proton-neutron interactions and make use of the systematics of these interactions to describe experimental data of nuclear masses and to predict some of the unknown masses. The odd-even effect staggering of the residual proton-neutron interaction between the last proton and the last neutron is found and argued in terms of pairing interactions. Two local mass relations, which work very accurately for masses of four neighboring nuclei, are discovered. The accuracy of our predicted masses for medium and heavy nuclei is competitive with that of the AME2003 extrapolations, with the virtue of simplicity. © 2011 American Physical Society.


Cheng Y.Y.,Shanghai JiaoTong University | Cheng Y.Y.,Beijing University of Technology | Zhao Y.M.,Shanghai JiaoTong University | Zhao Y.M.,Accelerator Centre | And 2 more authors.
Physical Review C - Nuclear Physics | Year: 2014

In this Rapid Communication we point out strong correlations between the Garvey-Kelson mass relations (GKs). These correlations are originated from the statistical odd-even feature of the interaction between the last proton and the last neutron in atomic nuclei and are instructive in reducing the deviations of the GKs in applications. © 2014 American Physical Society.


Shen J.J.,Shanghai JiaoTong University | Shen J.J.,RIKEN | Zhao Y.M.,Shanghai JiaoTong University | Zhao Y.M.,Accelerator Centre | And 2 more authors.
Physical Review C - Nuclear Physics | Year: 2010

In this paper, we investigate regular patterns of matrix elements of the nuclear shell model Hamiltonian H, by sorting the diagonal matrix elements from the smaller to the larger values. By using simple plots of nonzero matrix elements and lowest eigenvalues of artificially constructed submatrices h of H, we propose a new and simple formula, which predicts the lowest eigenvalue with remarkable precision. © 2010 The American Physical Society.


Jiang H.,Shanghai JiaoTong University | Jiang H.,Shanghai Maritime University | Fu G.J.,Shanghai JiaoTong University | Zhao Y.M.,Shanghai JiaoTong University | And 3 more authors.
Physical Review C - Nuclear Physics | Year: 2010

The proton-neutron interaction between the last proton and the last two neutrons, V 1p-2n, and that between the last two protons and the last neutron, V 2p-1n, for nuclei with mass number A≥60, are extracted by using experimental binding energies of neighboring nuclei. By using a simple function to describe V 1p-2n and V 2p-1n, we present new relations connecting the masses of neighboring nuclei with improved accuracies. © 2010 The American Physical Society.


Fu G.J.,Shanghai JiaoTong University | Jiang H.,Shanghai JiaoTong University | Jiang H.,Shanghai Maritime University | Zhao Y.M.,Shanghai JiaoTong University | And 5 more authors.
Physical Review C - Nuclear Physics | Year: 2010

By using an exponential function to simulate the residual proton-neutron interaction between valence nucleons, we derive a new set of local mass formulas that are competitive with the Garvey-Kelson mass relations for relating neighboring nuclear masses. © 2010 The American Physical Society.


Jiang H.,Shanghai Maritime University | Jiang H.,Shanghai JiaoTong University | Fu G.J.,Shanghai JiaoTong University | Zhao Y.M.,Shanghai JiaoTong University | And 3 more authors.
Physical Review C - Nuclear Physics | Year: 2011

Low-lying states of even-even Zn and odd-mass Ga nuclei with neutron numbers between 42 and 50 have been calculated within the framework of the SDG-pair approximation of the nuclear shell model. We employ a monopole and quadrupole pairing plus quadrupole-quadrupole interaction with optimized parameters, which are assumed to be constants for nuclei with the same proton number or neutron number. We calculate low-lying level schemes, electric quadrupole and magnetic dipole moments, and E2 and M1 transition rates. Reasonable agreement is achieved between the calculated results and experimental data. Dominant configurations in the ground states of odd-mass Ga nuclei are discussed in terms of pair correlations. The weak-coupling picture for some states of odd-mass Ga nuclei is studied. © 2011 American Physical Society.


Ferrier A.,Chimie Paristech | Thiel C.W.,Montana State University | Tumino B.,Chimie Paristech | Ramirez M.O.,Autonomous University of Madrid | And 4 more authors.
Physical Review B - Condensed Matter and Materials Physics | Year: 2013

Inhomogeneous and homogeneous linewidth are reported in a Eu3+ doped transparent Y2O3 ceramic for the 7F 0-5D0 transition, using high-resolution coherent spectroscopy. The 8.7-GHz inhomogeneous linewidth is close to that of single crystals, as is the 59-kHz homogeneous linewidth at 3 K (T2 = 5.4 μs). The homogeneous linewidth exhibits a temperature dependence that is typical of a crystalline environment, and additional dephasing observed in the ceramic is attributed to magnetic impurities or defects introduced during the synthesis process. The absence of Eu3+segregation at the grain boundaries, evidenced through confocal microfluorescence, further indicates that the majority of Eu3+ions in the ceramic experience an environment comparable to a single crystal. The obtained results suggest that ceramic materials can be competitive with single crystals for applications in quantum information and spectral hole burning devices, beyond their current applications in lasers and scintillators. © 2013 American Physical Society.


Shen J.J.,RIKEN | Shen J.J.,Shanghai JiaoTong University | Zhao Y.M.,Shanghai JiaoTong University | Zhao Y.M.,Accelerator Centre | And 3 more authors.
Physical Review C - Nuclear Physics | Year: 2011

We study extrapolation approaches to evaluate energies of low-lying states for nuclei in the sd and pf shells, by sorting the diagonal matrix elements of the nuclear shell-model Hamiltonian. We introduce an extrapolation method with perturbation and apply our new method to predict both low-lying state energies and E2 transition rates between low-lying states. Our predicted results arrive at an accuracy of the root-mean-squared deviations ~40-60 keV for low-lying states of these nuclei. © 2011 American Physical Society.


Jiang H.,Shanghai Maritime University | Jiang H.,Shanghai JiaoTong University | Fu G.J.,Shanghai JiaoTong University | Zhao Y.M.,Shanghai JiaoTong University | And 3 more authors.
Physical Review C - Nuclear Physics | Year: 2012

In this paper we study the volume and surface symmetry energy coefficients (csym(V) and csym(S)) by using the double differences of " experimental" symmetry energies. We assume a sym=csym(V)-csym(S)/ A1 /3 and obtain csym(V)=31.26±0.32 MeV and csym(S)=52.15±1.12 MeV, or csym(V)=32.10±0.31 MeV and csym(S)=58.91±1.08 MeV, depending on the form of the Wigner energy. The uncertainties of these coefficients are smaller than those in the literature. The values of csym(V) and κ S/V are unstable for different mass regions if one assumes a sym=csym(V)/(1+κ S/V/A1 /3). We notice an odd-even staggering in the double differences of "experimental" symmetry energies under a few situations, and suggest that the pairing interaction might not be properly taken into account in the current mass formulas. © 2012 American Physical Society.


Xu C.Q.,Soochow University of China | Yan S.L.,Soochow University of China | Yan S.L.,World Laboratory
Journal of Magnetism and Magnetic Materials | Year: 2013

Within the effective field theory (EFT), the compensation behaviors of mixed spin-1/2 and spin-1 Ising model with transverse crystal field in an external magnetic field are studied on a simple cubic lattice. The model exhibits two types of temperature and magnetic compensation point (Tk and hk) in M-T and M-h space, respectively. At zero or nonzero magnetic field, the single or double Tk is induced by positive transverse crystal field (+Dx/J), but not or only the single Tk in negative crystal field (-Dx/J). The single hk is discovered and adjusted by ±Dx/J. A complex oscillation of magnetization curves at low magnetic field and large ±Dx/J can be observed. The ranges of ±Dx/J which can induce the hk take on an opposite tendency and the oscillation phenomena become weak when the temperature is up. In particular, the influence of transverse crystal field on the temperature and magnetic compensation point is primarily proposed in this work. © 2013 Elsevier B.V. All rights reserved.

Loading World Laboratory collaborators
Loading World Laboratory collaborators