نتایج جستجو برای: polarized liquid 3he
تعداد نتایج: 254475 فیلتر نتایج به سال:
The electromagnetic inclusive responses of polarized 3He and 3H are thoroughly investigated at the quasielastic peak for squared momentum transfers up to 2 (GeV/c)2, within the plane wave impulse approximation. Great emphasys is put on the effects in the bound-state due to different twoand three-body nuclear forces, and to the Coulomb interaction as well. A careful analysis of the polarized res...
Effects of final state interaction on asymmetries in inclusive scattering of polarized electrons on polarized 3He are investigated using consistent 3He bound state wave function and 3N continuum scattering states. Significant effects are found, which influence the extraction of the magnetic neutron form factor from AT ′ . The enhancement found experimentally for ATL′ near the 3N breakup thresho...
HERMES, HERA Measurement of Spin, is an experiment to study the spin structure of the nucleon. The experiment was installed and commissioned in 1995 in the HERA storage ring at the DESY laboratory in Hamburg, Germany. Inclusive and semi-inclusive spin-dependent deep inelastic scattering on polarized internal gas targets are measured simultaneously in a forward spectrometer using. Data were take...
We describe linear and nonlinear dynamics of spin-polarized K and 3He ensembles interacting by spin exchange. The interactions are dominated by the imaginary part of the spin-exchange cross section and each spin species is primarily affected by the average magnetization of the other. Operating in a very low magnetic field we demonstrate novel dynamics when the electron and nuclear spin precessi...
A central part of the story of the discovery of superfluid 3He is the cooling technique used for the experiments, the Pomeranchuk effect. Although it is not an especially useful technique for obtaining low temperatures today, it contains my favorite example of the use of the Clausius-Clapeyron equation. The cooling technique is fun to describe in undergraduate physics classes on thermodynamics....
A study of the spin asymmetries for polarized elastic proton proton collisions in the electromagnetic hadronic interference (CNI) region of momentum transfer provides a method of self calibration of proton polarization. The method can be extended to non-identical spin half scattering so that, in principle, the polarization of a proton may be obtained through an analysis of its elastic collision...
It is shown that the nuclear effects playing a relevant role in Deep Inelastic Scattering of polarized electrons by polarized 3He are mainly those arising from the effective proton and neutron polarizations generated by the S′ and D waves in 3He. A simple and reliable equation relating the neutron, g 1 , and 3He, g3 1 , spin structure functions is proposed. It is shown that the measurement of t...
We present experimental results of the first high-precision test of quark-hadron duality in the spin-structure function g_{1} of the neutron and 3He using a polarized 3He target in the four-momentum-transfer-squared range from 0.7 to 4.0 (GeV/c);{2}. Global duality is observed for the spin-structure function g_{1} down to at least Q;{2}=1.8 (GeV/c);{2} in both targets. We have also formed the p...
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