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We review the problem of proton beam bombardment of solar chromosphere considering the self-consistent NLTE polarized radiation transfer in hydrogen lines. Several observations indicate a linear polarization of the H-alpha line of the order…

Astrophysics · Physics 2008-11-26 Jiri Stepan

Several efforts have been made to polarize the nearby nuclear environment of nitrogen vacancy (NV) centers for quantum metrology and quantum information applications. Different methods showed different nuclear spin polarization efficiencies…

Quantum Physics · Physics 2021-06-01 H. Duarte , H. T. Dinani , V. Jacques , J. R. Maze

The acceleration of polarized electron beams in the blowout regime of plasma-based acceleration is explored. An analytical model for the spin precession of single beam electrons, and depolarization rates of zero emittance electron beams, is…

Accelerator Physics · Physics 2011-08-22 J. Vieira , C. -K. Huang , W. B. Mori , L. O. Silva

We calculate the modification of the effective interaction of particles on the Fermi surface due to polarization contributions, with particular attention to spin-dependent forces. In addition to the standard spin-spin, tensor and spin-orbit…

Nuclear Theory · Physics 2009-11-10 A. Schwenk , B. Friman

The possible existence of short-range forces between unpolarized and polarized spin-1/2 particles has attracted the attention of physicists for decades. These forces are predicted in various theories and provide a possible new source for…

The neutron electric dipole moment (EDM) is a sensitive probe for currently undiscovered sources of charge-parity symmetry violation. As part of the TRIUMF Ultracold Advanced Neutron (TUCAN) collaboration, we are developing spin analyzers…

We study the neutrino spin oscillations, i.e., neutrino spin precession caused by the neutrino interaction with matter polarized by external magnetic field (or, equivalently, by the interaction of the induced magnetic moment (IMM) of a…

High Energy Physics - Phenomenology · Physics 2019-09-06 A. Grigoriev , E. Kupcheva , A. Ternov

Spin-polarized density functional calculations, magnetization, and neutron diffraction measurements are carried out to investigate the magnetic exchange interactions and strong correlation effects in Yb substituted inverse spinel nickel…

Materials Science · Physics 2017-07-26 Kodam Ugendar , S. Samanta , Sudhendra Rayaprol , V. Siruguri , G. Markandeyulu , B. R. K. Nanda

We perform metastability exchange optical pumping of helium-3 in a strong magnetic field of 1.5 T. The achieved nuclear polarization, from 80% at 1.33 mbar to 25% at 67 mbar, shows a substantial improvement at high pressures with respect to…

Atomic Physics · Physics 2009-09-29 Marie Abboud , Alice Sinatra , Xavier Maitre , Genevieve Tastevin , Pierre-Jean Nacher

Spin polarized states in neutron matter at strong magnetic fields up to $10^{18}$ G are considered in the model with the Skyrme effective interaction. Analyzing the self-consistent equations at zero temperature, it is shown that a…

Nuclear Theory · Physics 2011-04-07 A. A. Isayev , J. Yang

An extensive study of the effects of correlations on both charged and neutral current weak interaction rates in dense matter is performed. Both strong and electromagnetic correlations are considered.The propagation of particle-hole…

Astrophysics · Physics 2011-05-05 Sanjay Reddy , Madappa Prakash , James M. Lattimer , Jose A. Pons

We investigate the dynamically polarized nuclear-spin system in Fe/\emph{n}-GaAs heterostructures using the response of the electron-spin system to nuclear magnetic resonance (NMR) in lateral spin-valve devices. The hyperfine interaction is…

Mesoscale and Nanoscale Physics · Physics 2019-08-14 Kevin D. Christie , Chad C. Geppert , Sahil J. Patel , Q. O. Hu , Chris J. Palmstrøm , Paul A. Crowell

Measurements and modeling of electron spin transport and dynamics are used to characterize hyperfine interactions in Fe/GaAs devices with $n$-GaAs channels. Ga and As nuclei are polarized by electrically injected electron spins, and the…

Mesoscale and Nanoscale Physics · Physics 2015-05-14 M. K. Chan , Q. O. Hu , J. Zhang , T. Kondo , C. J. Palmstrøm , P. A. Crowell

Measurements of polarized neutron--polarized $^3$He scattering are reported. The target consisted of cryogenically-polarized solid $^3$He, thickness 0.04 atom/b and polarization 40%. The longitudinal and transverse total cross-section…

Nuclear Experiment · Physics 2009-10-30 C. D. Keith , C. R. Gould , D. G. Haase , M. L. Seely , P. R. Huffman , N. R. Roberson , W. Tornow , W. S. Wilburn

The change of the transverse spin asymmetry in the scattering of highly-relativistic spin-polarized electrons from nuclei by vacuum polarization effects is calculated within the Uehling approximation. Results are provided for 1 - 100 MeV…

Atomic Physics · Physics 2014-07-28 D. H. Jakubassa-Amundsen

Spontaneous nuclear polarization is predicted in double quantum dots in the spin-blocked electron transport regime. The polarization results from an instability of the zero-polarization state when singlet and triplet electron energy levels…

Mesoscale and Nanoscale Physics · Physics 2010-08-23 M. S. Rudner , L. S. Levitov

Similar to nitrogen-vacancy centers in diamond and impurity atoms in silicon, interstitial gallium deep paramagnetic centers in GaAsN have been proven to have useful characteristics for the development of spintronic devices. Among other…

A linearly polarized laser beam acquires its circular polarization by interacting with a neutrino beam for the reason that the gauge-couplings of left-handed neutrinos are parity-violated. Based on this phenomena, we study the oscillations…

High Energy Physics - Phenomenology · Physics 2016-02-02 Pouya Bakhti , Rohoollah Mohammadi , She-Sheng Xue

We measure the rates of elastic and inelastic two-body collisions of cold spin-polarized neon atoms in the metastable 3P2 state for 20^Ne and 22^Ne in a magnetic trap. From particle loss, we determine the loss parameter of inelastic…

Quantum Physics · Physics 2016-09-08 P. Spoden , M. Zinner , N. Herschbach , W. van Drunen , W. Ertmer , G. Birkl

We investigate the intrinsic spin dynamics of electrons bound to Al impurities in bulk ZnO by optical spin noise spectroscopy. Spin noise spectroscopy enables us to investigate the longitudinal and transverse spin relaxation time with…

Mesoscale and Nanoscale Physics · Physics 2015-06-11 H. Horn , A. Balocchi , X. Marie , A. Bakin , A. Waag , M. Oestreich , J. Hübner