Results 161 to 170 of about 24,460 (200)
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Coulomb effects in high energy He4He4 elastic scattering
Annals of Physics, 1970Abstract In this note we extend the results of previous work (Ref. [1]) for high energy He 4 He 4 elastic scattering to include the Coulomb corrections. We find these corrections important around the diffractive minima.
W Czyż, L.C Maximon
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Excited states of Li6 observed through He4(d, d)He4
Nuclear Physics, 1964Angular distributions (18° ≦ θ_(c.m.) ≦156 °) for the elastic scattering of deuterons from He4 have been obtained at 500 keV intervals for bombarding energies between 2.9 and 11.5 MeV. A phase shift analysis of these data has been made yielding confirming evidence for the existence of D wave, J^π = 2^+ and 1^+ levels at excitation energies of 4.9 and 6.
Senhouse, L. S., Jr., Tombrello, T. A.
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Immunoanalytical characteristics of HE4 protein
Annales de biologie clinique, 2018Besides structural and physiological data of HE4 protein, this paper points out the optimal conditions for sampling, assays and interpretation of results for the management of ovarian cancer.
Cédric, Desbène +2 more
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He4-He4 interaction potential from low energy total cross section measurements
Zeitschrift für Physik A Hadrons and nuclei, 1972Total relative and absolute cross sections for He4-He4 have been measured between 110 and 1100 m/s velocity of the primary beam at scattering chamber temperatures of 5.0 and 77 K. Our measurements are sensitive to the low energy repulsive and the attractive part of the potential.
H. G. Bennewitz +4 more
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Phenomenological He4-He4 potential and the properties of liquid helium (He4)
Czechoslovak Journal of Physics, 1970The properties of liquid He4 whose particles are interacting among themselves through an equivalent two-body Gaussian potential are studied by using the Bogolubov method. It is shown that the value of the hard-core radius σ≦2·2 A°; the most probable values form*/m lie between 1·292 and 9 and that forΔ/k between 8 and 16 °K.
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The Journal of Chemical Physics, 2001
Optimized variational calculations have been carried out for clusters of He4 between N=20 and N=1000 atoms. For small cluster sizes with less or equal to 112 particles, where comparisons with existing diffusion Monte Carlo results are possible, we find good agreement for the ground state energies and densities.
E. Krotscheck, R. Zillich
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Optimized variational calculations have been carried out for clusters of He4 between N=20 and N=1000 atoms. For small cluster sizes with less or equal to 112 particles, where comparisons with existing diffusion Monte Carlo results are possible, we find good agreement for the ground state energies and densities.
E. Krotscheck, R. Zillich
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P-Odd effects in the ?+He4 ? He4 + ?0 reaction
Soviet Physics Journal, 1978P-Odd effects with the elastic photoinformation of neutral pions in He4 nuclei are due to the interference of the P-odd amplitude of weak interaction with the P-even amplitude of strong interaction, and originate only for polarized photons. It is shown that close to the reaction threshold P-odd effects should be small. The interference amplitude of the
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Review of Scientific Instruments, 2001
We describe the realization of a He4 magnetometer based on optical pumping with an optical frequency modulated laser diode light. Performances (amplitude and frequency spatial isotropy and sensitivity) of our device are presented and compared with those of other scalar magnetometers.
H. Gilles, J. Hamel, B. Chéron
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We describe the realization of a He4 magnetometer based on optical pumping with an optical frequency modulated laser diode light. Performances (amplitude and frequency spatial isotropy and sensitivity) of our device are presented and compared with those of other scalar magnetometers.
H. Gilles, J. Hamel, B. Chéron
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Cryogenics, 1976
Isotopic purification of He4 is conventionally accomplished by 'filtration' through a superleak which may, for example, be of compressed rouge or of Vicor glass. An intrinsic limitation of this procedure is that a small fraction of the He3 isotopic impurities passes through along with the superfluid He4, the exact proportion depending on the pore size ...
Atkins, M., McClintock, Peter V. E.
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Isotopic purification of He4 is conventionally accomplished by 'filtration' through a superleak which may, for example, be of compressed rouge or of Vicor glass. An intrinsic limitation of this procedure is that a small fraction of the He3 isotopic impurities passes through along with the superfluid He4, the exact proportion depending on the pore size ...
Atkins, M., McClintock, Peter V. E.
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A novel He3He4 dilution refrigerator with superfluid He4 circulation
Cryogenics, 1980Abstract A novel dilution refrigerator system is proposed, which offers the potentiality of very high circulation rates. The design of this refrigerator is described and the construction and performance of a prototype are discussed. He4 is circulated by means of a multi-stage thermomechanical or fountain pump, which can build up high fountain ...
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