Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Spin dependence"”.
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Spin Dependence in Polarized Proton-Proton Elastic Scattering at RHIC
… with the unique capability of RHIC to collide spin-polarized proton beams, allows STAR to study both the dynamics and the spin-dependence of the proton-proton (<em> pp</em>) elastic scattering process. Silicon strip detectors, installed inside the Roman Pots, measure tracks of protons scattered …
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A study of the spin dependence of pion electroproduction near the [delta] region
… of 0.1 to 0.4 (GeV/c)2. By flipping the target spin direction and the electron beam helicity, the single- (beam only and target only) and double-spin (beam-target) asymmetries were constructed from the measured yields with different spin combinations, covering two kinematic setups: longitudinal …
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Nuclear Spin Dependence in Reactions of Hydrogen (3+) Ion in the Laboratory and the Interstellar Medium
… work have implications for the use of the H+3 spin modifications as astrophysical probes, for understanding the deuterium chemistry of the interstellar medium, and for the fundamental chemical physics of these very simple molecules.
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The nuclear spin dependence of the reaction of H3+ with H2 and the proposed spectroscopic investigation of HO2+
… its parent neutral, H$_2$, exist in two nuclear spin configurations, \emph{ortho} and \emph{para}, and yield unique spectral signatures that can be measured in the laboratory and in astronomical environments. Most importantly, these species have been found to be useful temperature probes of …
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Nucleon-Nucleon Spin Dependent Scattering Amplitudes to Describe Final State Interactions in Electromagnetic and Electroweak Nuclear Processes
… readily available that provide nucleon-nucleon spin dependent scattering amplitudes at high energies (<em> s</em> ≥ 6 GeV<sup>2)</sup>. This work aims to provide a model for calculating these high-energy scattering amplitudes. The foundation of the model is Regge theory since it allows for a …
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Resonance contribution to electromagnetic structure functions
… waves are presented and are used to specify the spin dependence of the transition form factors. The dependence of the form factors on momentum transfer and resonance mass is assumed on the basis of the behavior of exclusive resonance electroproduction. The single resonance contributions are …
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Spin dependent reactions in an electronically excited helium discharge
The electron spin dependence of reactions involving helium metastable atoms is investigated using optical pumping and microwave diagnostic techniques. Wigner (1927) proposed that electron spin angular momentum is conserved in atomic collisions. This rule of elec-tron spin conservation is tested in …
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Transverse spin asymmetries in neutral strange particle production
The origin of the quantum mechanical spin of the proton in terms of its constituents is not yet fully understood. The discovery that the intrinsic spin of quarks contributes only a small fraction of the total proton spin sparked a huge theoretical and experimental effort to understand the origin of …
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Chemical physics and astrochemistry of H3+ and sub Doppler mid infrared spectroscopy of molecular ions
… the interstellar abundances of the two nuclear spin configurations of H3+ (ortho-H3+, I=3/2; and para-H3+, I=1/2) remain. In this thesis, experiments to measure the nuclear spin dependence of the chemical reactions of H3+ with electrons and with molecular hydrogen at astronomically relevant …
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Study of localization and correlation effects in disordered electronic systems
… susceptibility, and diffusion of charge-and spin-density fluctuations, for example. We have also investigated the effects of localization in the vicinity of magnetic instabilities on the Stoner criterion, Stoner excitations and the spin-wave mode. A macroscopic renormalization group study of …