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First measurement of the polarisation transfer on the proton in the reactions $$H(\vec e,e'\vec p)$$ and $$D(\vec e,e'\vec p)$$ (1995)

Eyl, D. ; Frey, A. ; Andresen, H. G. ; [weitere]

Springer

The European physical journal 352 (1995), S. 211-214

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ISSN: 1434-601X

Schlagwort(e): 13.40.Fn ; 25.30.Bf

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The measurement of the polarisation transfer to the proton in the reactions $$H(\vec e,e'\vec p)$$ and $$D(\vec e,e'\vec p)$$ performed with longitudinally polarised electrons in quasi-free kinematics is presented. The coincidence measurement was executed atQ 2≈8fm −2 using the 855 MeV, c.w. beam of the Mainz Microtron MAMI. The recoil polarisation was determined by means of a carbon analyser. The experiment shows that the binding of the nucleon does not modify the polarisationP x of the recoil proton within an error ofΔ P x/Px≈10%. The measured polarisation agrees with recent theoretical predictions. Implications for the measurement of the electric form factor of the neutron using the $$D(\vec e,e'\vec n)$$ reaction are discussed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01298910

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Digitale Medien

STEADY VISCOELASTIC FLOW PAST A SPHERE USING SPECTRAL ELEMENTS (1996)

OWENS, R. G. ; PHILLIPS, T. N.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 39 (1996), S. 1517-1534

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ISSN: 0029-5981

Schlagwort(e): spectral elements ; viscoelasticity ; time-splitting method ; drag factor ; Uzawa algorithm ; Engineering ; Engineering General

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Mathematik , Technik allgemein

Notizen: The steady flow of a viscoelastic fluid past a sphere in a cylindrical tube is considered. A spectral element method is used to solve the system of coupled non-linear partial differential equations governing the flow. The spectral element method combines the flexibility of the traditional finite element method with the accuracy of spectral methods. A time-splitting algorithm is used to determine the solution to the steady problem. Results are presented for the Oldroyd B model. These show excellent agreement with the literature. The results converge with mesh refinement. A limiting Deborah number of approximately 0⋅6 is found, irrespective of the spatial resolution.

Zusätzliches Material: 25 Ill.

Materialart: Digitale Medien

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