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[en] The accelerating gradient in RF superconducting cavities is presently limited by surface defects. Dust contamination is known to be a significant source of such defects. Measurements of dust density were made on well characterized surfaces during various steps of a standard cavity preparation process. To avoid contamination, an automatic apparatus for chemical treatments of cavities was developed. The first cavity treated with this equipment gave excellent results with respect to Q0 value and maximum accelerating gradient. (R.P.) 3 refs.; 2 figs.; 1 tab
Source
Henke, H. (Technische Univ., Berlin (Germany). Inst. fuer Theoretische Elektrotechnik); Homeyer, H. (Hahn-Meitner-Institut Berlin GmbH (Germany)); Petit-Jean-Genaz, Ch. (eds.); [941 p.]; ISBN 2-86332-115-3; 
; 1992; p. 1319-1321; Editions Frontieres; Paris (France); EPAC 92: 3. European particle accelerator conference; Berlin (Germany); 24-28 Mar 1992
; 1992; p. 1319-1321; Editions Frontieres; Paris (France); EPAC 92: 3. European particle accelerator conference; Berlin (Germany); 24-28 Mar 1992
[en] Simultaneous measurements of the fission probabilities and the fission fragment angular distributions in (d,pf) reactions, performed with a resolution of about seven keV, reveal the presence of different types of fine structure. The thorium results can be interpreted in terms of pure rotational bands in the third well of the fission barrier, while, for the uranium isotopes, states in the second well come also into play
Source
Young, P.G.; Brown, R.E.; Auchampaugh, G.F.; Lisowski, P.W.; Stewart, L; p. 311-315; ISBN 0-677-21330-1; ; 1985; p. 311-315; Gordon and Breach; New York, NY (USA); International conference on nuclear data for basic and applied science; Santa Fe, NM (USA); 13-17 May 1985
; 1985; p. 311-315; Gordon and Breach; New York, NY (USA); International conference on nuclear data for basic and applied science; Santa Fe, NM (USA); 13-17 May 1985
[en] An accelerator test facility is being built at Saclay. The project is founded since February 1989. The present 700 MeV electron accelerator ALS will be shut down on June 10th 1990 and partly taken apart to provide room for MACSE first prototype. Beam is expected by the end of year 1990. First electron beam is expected through superconducting cavities by the end of year 1990. (R.P.) 4 refs.; 2 figs
Source
Marin, P.; Mandrillon, P. (eds.); 376 p; ISBN 2-86332-090-4; ; 1990; p. 155-156; Editions Frontieres; Paris (France); 2. European Particle Accelerator Conference; Nice (France); 12-16 Jun 1990
; 1990; p. 155-156; Editions Frontieres; Paris (France); 2. European Particle Accelerator Conference; Nice (France); 12-16 Jun 1990
[en] An experiment was carried out at Modane (Laboratoire Souterrain de Modane, France) to determine the ratio Γπ0/ΓSF using a Cf source. The very small cosmic ray rate made it possible to assign to the ratio an upper limit of 3.10-13 with a 95% confidence level. Moreover, high energy events were detected in coincidence: they are partially explained in terms of neutron pile-up. Nevertheless, the emission of high energy gammas is not excluded. (author) 4 figs., 3 refs
Source
Povinec, P. (ed.) (Komenskeho Univ., Bratislava (Slovakia). Matematicko-Fyzikalna Fakulta); Komenskeho Univ., Bratislava (Slovakia). Matematicko-Fyzikalna Fakulta; 441 p; ISBN 981-02-0802-2; ; 1992; p. 116-120; World Scientific Publishing Co. Pte. Ltd; Singapore (Singapore); 14. europhysics conference on nuclear physics; Bratislava (Slovakia); 22-26 Oct 1990
; 1992; p. 116-120; World Scientific Publishing Co. Pte. Ltd; Singapore (Singapore); 14. europhysics conference on nuclear physics; Bratislava (Slovakia); 22-26 Oct 1990
[en] A simultaneous measurement of the 230Th(d,pf) fission probability and the associated fission fragment angular distribution reveals the presence of new resonant states of the fissioning 231Th nucleus at excitant energies around 5.9 MeV. These states are interpretated as high spin members of a pair of rotational bands, thus confirming the previous evidence of a third minimum in the fission barrier of 231Th at octupole deformations
Journal
Journal de Physique. Lettres; ISSN 0302-072X; ; v. 45(17); p. L.843-L.849
; v. 45(17); p. L.843-L.849
[en] Simultaneous measurements of the fission probabilities and the fission fragment angular distributions in (d,pf) reactions, performed with a resolution of about seven keV, reveal the presence of different types of fine structure. The thorium results can be interpreted in terms of pure rotational bands in the third well of the fission barrier, while, for the uranium isotopes, states in the second well come also into play. (author)
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