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Showing 1 to 8 of 8 for “"quasifree"”.
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Quasifree knockout of charged particles from ⁴He with 100 MeV protons
… Approximation (DWIA) as a description of these quasifree knockout reactions, at all geometries where the knockout cross section is significant. Six particle telescopes, each consisting of two silicon detectors and a NaI detector, were used to measure the coincident particles. The experimental …
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Measurement of the Neutron-Neutron Quasifree Scattering Cross Section in Neutron-Deuteron Breakup at 10.0 and 15.6 MeV
<p>Neutron-neutron (nn) quasifree scattering (QFS) in neutron-deuteron (nd) breakup is the kinematic configuration in which the proton remains at rest in the laboratory frame. The cross section for this process is sensitive to the 1S0 component of the nn interaction. Recent measurements of the …
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Quantum random walks
… via products of cocycles. The CCR algebra, its quasifree representations and the corresponding quasifree stochastic calculus are also described. In particular, we study in detail gauge-invariant and squeezed quasifree states. We describe repeated quantum interactions between a `small' quantum …
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Coincident proton decay of the continuum induced by 200 MeV protons on 12C
… continuum. This model considers an initial quasifree nucleon-nucleon interaction - described by a distorted wave impulse approximation (DWIA) treatment - between the incident proton and a single target nucleon, followed by the rescattering of the struck nucleon, which behaves as an …
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A survey of beam asymmetries in semi-exclusive electron scattering on helium-4 and carbon-12
… a channel with a single dominant mechanism. In quasifree nucleon knockout, the helicity asymmetry provides an unambiguous signature for the interference between direct knockout and rescattering amplitudes. The data were taken in April--May 1999 using polarized beams of energies between 2.2 and …
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Dynamical C*-Algebras and Quadratic Perturbations for Fermions
… criterion for every gauge-invariant, quasifree, Hadamard state on the CAR algebra in a globally hyperbolic spacetime with compact Cauchy surfaces, and for the Minkowski vacuum; therefore the Bogoliubov transformation is implemented via unitary operators on the associated representation …
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Quantum Wiener chaos
… quantum stochastic evolutions. The corresponding quasifree case is also studied and the constructions extended to fit in that formalism. We construct the multiple quantum Wiener integral as one operator on a family of operators which we dub operator kernels. This in particular covers the case of …
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Far-infrared superradiance in methyl fluoride
… Bloch vector tipping angle, was treated as quasifree and varied to try to fit the data. By choosing the proper fUnctional dependence of the tipping angle on cell length and pressure, a good fit was obtained to all the forward-wave data. (The backward~wave case was not considered here.) It …