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Showing 1 to 12 of 12 for “"He4"”.
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Phonon-quasiparticle interactions in dilute solutions of He3 in superfluid He4
… in dilute solutions of He3 in superfluid He4 and the role they play in determining the linear response prQperties of such solutions are examined. The vertices for phonon scattering and absorption by He3 quasiparticles as well as the effective interaction between quasiparticles are …
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Emergent Critical Properties in Liquid-Gas Transition and Single Dislocations in Solid He4
<p>My research focuses on the analytical and numerical study of seemingly completely different systems - the classical critical point of the liquid-gas transition and a quantum topological defect (dislocation) in solid Helium-4. The unifying theme, though, is <em>Emergence</em> - the appearance of …
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Differential cross sections for the reaction He4(gamma, p)H3 from 55 to 165 MeV
… sections have been measured for the reaction He4 (y,p)H3 for incident photons of 55 to 165 MeV. Outgoing protons and tritons from a low temperature He target were detected in coincidence at three angular settings in the 1aboratqry: (8p ' 8T) = (59.5, 106°), (88.5°, 75°), and (118°, 47.5°). The …
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Magnetic properties of dilute solutions of liquid He³ in He⁴ at low temperatures
… susceptibility of dilute solutions of He3 in He4 has been measured down to about 3moK. These measurements were made on two solutions of nominal concentrations of 1.3 and 5.0% He3 in He4 under their own vapor pressures. The values of the diffusion coefficient fit T*-2 laws below about 10moK for …
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Photoproduction of neutral pions in helium by 335 MEV Bremsstrahlung
… the, coherent production of neutral pions from He4 by photons to an energy of 335 MeV. Bremsstrahlung from the University of Illinois 340 MeV betatron impinged upon a gaseous He4 target cooled to 20.4oK. The recoil nucleus was detected with a semiconductor telescope in coincidence with at least …
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Path integral calculation of the three-particle direct and exchange contributions to the pair distribution function and of the third virial coefficient for He4 gas
Submitted by William Weathers (weathrs2@illinois.edu) on 2012-04-05T21:44:13Z No. of bitstreams: 1 1971_jacobson.pdf: 3649658 bytes, checksum: 504357d3cab20b2c302b26311f1170d6 (MD5)
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Modeling the Non-equilibrium Phenomenon of Diffusion in Closed and Open Systems at an Atomistic Level Using Steepest-Entropy-Ascent Quantum Thermodynamics
… for an isolated system in which He3 diffuses in He4. The model developed is able to predict the non-equilibrium and equilibrium characteristics of diffusion as well as capture the differences in behavior of fermions (He3) and bosons (He4). The SEAQT framework is also used to develop the transient …
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Ground state and dynamical properties of many-body systems by non conventional Quantum Monte Carlo algorithms
… to the study of excitations in superfluid He4 and to explore the structure of nuclear systems using chiral effective field theory interactions.
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Heat capacity of dilute solutions of liquid He[superscript 3] in He[superscript 4] at low temperatures
… made on two dilute solutions of 1iquid He3 in He4. These data, taken under saturated vapor o 0 pressure at temperatures between .005 K and .20 K, are characteristic of an ideal Fermi gas with m'l'< dependent only slightly on concentration. The solution with a molar concentration of Re3 of (1.32 …
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A Bf3 Fast Neutron Dosimeter (Long Counter)
… and the induced reactions H2(d,n)He3 and H3(d,n)He4. Long counter efficiencies for both a 1 inch and 1/2 inch BF) tube yield a flat response over the energy range, 2.5 to 4 Mev whereas an approximately 60% decrease in efficiency is observed for a 14.1 Mev neutron. Count rate of long counter is …
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High-temperature critical indices for the classical anisotropic Heisenberg model
… a lattice model of the A-transition of liquid He4 is discussed. The results for the 'model are compared with experiment. In view of recent interest in spinel structures and to present a graphic example of the dangers which lie in attempts to extrapolate too-short series, some results for that …
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Integrating High-throughput Technologies for the Identification and Validation of Novel Ovarian Cancer Biomarkers
… markers for ovarian cancer - CA125 and HE4 alone - perform poorly for the mucinous, endometrioid and clear cell subtypes and thus, diagnosis of these subtypes remains a significant challenge. To this end, an integrated approach to ovarian cancer biomarker discovery was developed in this …