Results 61 to 70 of about 1,506,118 (205)

Criticality in coupled quantum spin-chains with competing ladder-like and two-dimensional couplings

, 2003
Motivated by the geometry of spins in the material CaCu$_2$O$_3$, we study a two-layer, spin-half Heisenberg model, with nearest-neighbor exchange couplings J and \alpha*J along the two axes in the plane and a coupling J_\perp perpendicular to the planes.
A.V. Chubukov, A.W. Sandvik, A.W. Sandvik, A.W. Sandvik, A.W. Sandvik, A.W. Sandvik, A.W. Sandvik, D.C. Johnston, E. Dagotto, E.L. Pollock, H. Kageyama, I. Affleck, I. Affleck, J. Oitmaa, J.H. Schön, K. Harada, K. Hida, M. Azuma, M. Greven, M. Troyer, M. Wallin, M.P. Gelfand, M.P. Gelfand, N. Motoyama, O.A. Starykh, O.F. Syljuåsen, P. Kopietz, P.V. Shevchenko, Pinaki Sengupta, R. Coldea, R.R.P. Singh, Rajiv R. P. Singh, S. Chakravarty, S.R. White, V. Kiryukhin, W. Kohn, W. Zheng, Weihong Zheng, Y.J. Kim   +38 more
core   +1 more source

Investigation of the optical and radiation shielding parameters of erbium-doped zinc sodium tungsten borate glass using MCNP5 simulations

Materials Research Express
This study explores the potential of (20Na _2 O+25ZnO+10WO _3 +(60-x)B _2 O _3 +xEr _2 O _3 where x = 0.1, 0.5, 0.7, and 1 mol%) glass for optical and radiation shielding applications, fabricated using the melt quenching method.
Usman Iliyasu, Mohamad Syazwan Mohd Sanusi, Nor Ezzaty Ahmad   +2 more
doaj   +1 more source

The Radiation Attenuation Property of High-Density Polyethylene Doped with Zinc Oxide as an Alternative Gonadal Shield

Recoletos Multidisciplinary Research Journal
Background: The study investigated the radiation attenuation properties of high-density polyethylene doped with zinc oxide as an alternative to the commercially available gonadal shield in different concentrations.
Sofia Van Antonionni Pumar, Roberto Jr. Tagalog, Stephen Andrie Bitoon, Aaliyah Marie Damalerio, Christie Maureese Espinosa, Gleecyl Ann Pros   +5 more
doaj   +1 more source

Calculation of gamma-ray attenuation parameters for locally developed shielding material: Polyboron

Journal of Radiation Research and Applied Sciences, 2016
In the present study, the mass attenuation coefficient (μm) has been calculated analytically for a locally developed shielding material, polyboron, and compared with the values obtained from the WinXCom code, a Windows version of the XCOM database at the
Ripan Biswas, Hossain Sahadath, Abdus Sattar Mollah, Md. Fazlul Huq   +3 more
doaj   +1 more source

An approach for solving the boundary free edge difficulties in SPH modelling: application to a viscous accretion disc in close binaries

, 2011
In this work, we propose a SPH interpolating Kernel reformulation suitable also to treat free edge boundaries in the computational domain. Application to both inviscid and viscous stationary low compressibility accretion disc models in Close Binaries (CB)
Belvedere, Benz, Bonet, Bonet, Boris, Costa, Drimmel, Evrard, Feldman, Flebbe, Flebbe, Frank, Fulbright, G. Lanzafame, Hernquist, Imaeda, Kaisig, Katz, Lanzafame, Lanzafame, Lanzafame, Lanzafame, Lanzafame, Lanzafame, Lanzafame, Lanzafame, Lanzafame, Lasota, Lattanzio, Liu, Lubow, Meglicki, Miyama, Molteni, Monaghan, Monaghan, Monaghan, Monaghan, Monaghan, Monaghan, Monaghan, Morris, Murray, Nelson, Nelson, Okazaki, Owen, Pringle, Savonije, Sawada, Sawada, Shakura, Shakura, Shakura, Shapiro, Sod, Speith, Speith, Springel, Spruit, Vaughan   +60 more
core   +1 more source

A Comprehensive Spectroscopic Analysis of DB White Dwarfs [PDF]

, 2011
We present a detailed analysis of 108 helium-line (DB) white dwarfs based on model atmosphere fits to high signal-to-noise optical spectroscopy. We derive a mean mass of 0.67 Mo for our sample, with a dispersion of only 0.09 Mo. White dwarfs also showing
A. Beauchamp, A. Gianninas, Beauchamp, Beauchamp, Beauchamp, Beauchamp, Beauchamp, Beauchamp, Bergeron, Bergeron, Brassard, Brassard, Böhm, C. Hunter, Deridder, Desharnais, Dufour, Dufour, Dufour, Dufour, Eisenstein, F. Wesemael, Fontaine, Friedrich, G. Fontaine, Gould, Holberg, Holberg, Holberg, Hunter, James Liebert, John, Koester, Liebert, Limoges, Limoges, Lépine, M. T. Ruiz, M.-M. Limoges, Massa, P. Bergeron, Patrick Dufour, Petitclerc, Pierre Dufour, Press, Rex A. Saffer, Tremblay, Tremblay, Tremblay, van Altena, Wesemael, Wickramasinghe   +51 more
core   +1 more source

Radiation shielding properties of selenium-based lead borate PbO-SeO2-B2O3 glass for X-ray and gamma radiation

Physics Open
The radiation shielding properties of selenium-based lead borate glass systems xSeO2 + (25-x) B2O3 + 75PbO (x = 0, 0.2, 0.4, 0.6) were investigated using the MCNPx simulation and the Phy-x/PSD program in the energy range of 0.015–15 MeV.
Suleman Muhammad, Seema Mukamil, Iltaf Muhammad, Sang Peng, Kunning Niu, Zan Zhang, Yongsheng Li   +6 more
doaj   +1 more source

Half Metallic Bilayer Graphene [PDF]

, 2013
Charge neutral bilayer graphene has a gapped ground state as transport experiments demonstrate. One of the plausible such ground states is layered antiferromagnetic spin density wave (LAF) state, where the spins in top and bottom layers have same ...
Gao, Jin-Hua, Wang, Hao, Xu, Dong-Hui, Yuan, Jie, Zhang, Fu-Chun, Zhou, Yi   +5 more
core   +2 more sources

Corrections for attached sidewall boundary-layer effects in 2-dimensional airfoil testing [PDF]

The problems of sidewall boundary-layer effects in airfoil testing is treated by considering the changes in the flow area due to boundary-layer thinning under the influence of the airfoil flowfield.
Murthy, A. V.
core   +1 more source

Geant4 comprehensive evaluation of polystyrene-tungsten (VI) oxide composites for gamma and neutron radiation shielding enhancement

Nuclear Engineering and Technology
This study investigates the radiation-shielding abilities of PS-WO3 composites across a range of energies, from 0.46 MeV to 2 MeV. The main objective is to discover the gamma mass attenuation (μ/ρ) and linear attenuation (μ) coefficients, along with the ...
Bashir Garba Aminu, Yong-Kuo Liu, Hanan Akhdar, Amos Kipkosgei C   +3 more
doaj   +1 more source