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We measure electron and nuclear spin transition frequencies in the ground state of nitrogen-vacancy (NV) centers in diamond for two nitrogen isotopes ($^{14}\mathrm{NV}$ and $^{15}\mathrm{NV}$) over temperatures ranging from 77 K to 400 K.…

In this contribution, we compute the $^1$H nuclear magnetic resonance (NMR) relaxation rate of liquid water at ambient conditions. We are using structural and dynamical information from Coupled Cluster Molecular Dynamics (CCMD) trajectories…

The pseudorapidity densities of transverse energy, the charged particle multiplicity and their ratios, $E_T/N_{ch}$, are estimated at mid-rapidity, in a statistical-thermal model based on chemical freeze-out criteria, for a wide range of…

高能物理 - 唯象学 · 物理学 2008-11-26 J. Cleymans , R. Sahoo , D. P. Mahapatra , D K Srivastava , S. Wheaton

The classical Heisenberg model is applied in a Monte Carlo study to investigate the distance dependence of the indirect nearest neighbor (NN) exchange and next-nearest neighbor (NNN) superexchange interaction in EuO, EuS, EuSe and EuTe. For…

材料科学 · 物理学 2010-05-10 W. Söllinger , W. Heiss , R. T. Lechner , K. Rumpf , P. Granitzer , H. Krenn , G. Springholz

We calculate the configurational entropy S_conf for the SPC/E model of water for state points covering a large region of the (T,rho) plane. We find that (i) the (T,rho) dependence of S_conf correlates with the diffusion constant and (ii)…

软凝聚态物质 · 物理学 2012-03-08 Antonio Scala , Francis W. Starr , Emilia La Nave , Francesco Sciortino , H. Eugene Stanley

We have developed x-ray diffraction measurements with high energy-resolution and accuracy to study water structure at three different temperatures (7, 25 and 66 C) under normal pressure. Using a spherically curved Ge crystal an energy…

Using super-heterodyne Doppler velocimetry with multiple scattering correction, we extend the opti-cally accessible range of concentrations in experiments on colloidal electro-kinetics. We here meas-ured the electro-phoretic mobility and…

软凝聚态物质 · 物理学 2020-07-15 Denis Botin , Felix Carrique , Emilio Ruiz-Reina , Thomas Palberg

We investigate the temperature dependence of thermodynamic (density, isobaric heat capacity), dynamical (self-diffusion coefficient, shear viscosity), and dielectric properties of several water models, the commonly employed TIP3P water…

软凝聚态物质 · 物理学 2022-04-13 Tatiana I. Morozova , Nicolas A. Garcia , Jean-Louis Barrat

We develop a non-perturbative approach for calculating the superconducting transition temperatures ($T_{c}$) of liquids. The electron-electron scattering amplitude induced by electron-phonon coupling (EPC), from which the effective pairing…

超导电性 · 物理学 2020-03-25 Huiying Liu , Ying Yuan , Donghao Liu , Xin-Zheng Li , Junren Shi

Significant temperature effects on the electrokinetic transport in a nanochannel with a slab geometry are demonstrated using a molecular dynamics (MD) model. A system consisting of Na+ and Cl- ions dissolved in water and confined between…

软凝聚态物质 · 物理学 2010-07-01 B. Jelinek , S. D. Felicelli , P. F. Mlakar , J. F. Peters

The description of molecular motion by macroscopic hydrodynamics has a long and continuing history. The Stokes-Einstein relation between the diffusion coefficient of a solute and the solvent viscosity predicted using macroscopic continuum…

无序系统与神经网络 · 物理学 2007-05-23 Xiaoyu Xia , Peter G. Wolynes

We report the diffusion coefficient and viscosity of popular rigid water models: Two non polarizable ones (SPC/E with 3 sites, and TIP4P/2005 with 4 sites) and a polarizable one (Dang-Chang, 4 sites). We exploit the dependence of the…

Thermometry based on magnetic resonance has been extensively studied due to its important application in biomedical imaging. In our previous work, we showed that the spin-spin relaxation time (T2) of nuclear magnetic resonance (NMR) in…

应用物理 · 物理学 2024-11-05 Pei-Yun Lin , Darshan Chalise , David G. Cahill

The diffusion of atoms and radicals on interstellar dust grains is a fundamental ingredient for predicting accurate molecular abundances in astronomical environments. Quantitative values of diffusivity and diffusion barriers usually rely…

星系天体物理 · 物理学 2021-12-22 Viktor Zaverkin , Germán Molpeceres , Johannes Kästner

We present data for energy dissipation factor (Q^{-1}) over a broad temperature range at various pressures of a torsion pendulum setup used to study 3He confined in a 98% open silica aerogel. Values for Q^{-1} above T_c are temperature…

超导电性 · 物理学 2015-06-17 N. Zhelev , R. G. Bennett , E. N. Smith , J. Pollanen , W. P. Halperin , J. M. Parpia

We report on terahertz (THz) electron paramagnetic resonance generalized spectroscopic ellipsometry (THz-EPR-GSE). Measurements of the field and frequency dependencies of the magnetic response due to the spin transitions associated with the…

We present incoherent quasi-elastic neutron scattering measurements in a wavevector transfer range from 0.4 AA^{-1} to 1.6AA^{-1} on liquid n-hexane confined in cylindrical, parallel-aligned nanochannels of 6 nm mean diameter and 260…

软凝聚态物质 · 物理学 2012-04-12 Tommy Hofmann , Dirk Wallacher , Maria Mayorova , Reiner Zorn , Bernhard Frick , Patrick Huber

Dynamic nuclear polarization experiments use microwave irradiation to transfer the larger electron polarization to nuclear spins of interest, and thus enhance the NMR transitions above thermal equilibrium. How the polarization transfer from…

化学物理 · 物理学 2026-01-12 Gian-Marco Camenisch , Nino Wili , Gunnar Jeschke , Matthias Ernst

The electron spin resonance (ESR) of nanoscale molecular magnet ${\rm V}_{15}$ is studied. Since the Hamiltonian of ${\rm V}_{15}$ has a large Hilbert space and numerical calculations of the ESR signal evaluating the Kubo formula with exact…

统计力学 · 物理学 2015-06-24 Manabu Machida , Toshiaki Iitaka , Seiji Miyashita

Soft diffraction phenomena in elastic nucleon scattering are considered from the viewpoint of the spin dependence of the interaction potential. Spin-dependent pomeron effects are analyzed for elastic $pp$ scattering, spin-dependent…

高能物理 - 唯象学 · 物理学 2021-05-05 O. V. Selyugin