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71.
The second excited state of8Be has been studied by analysis of the coincidence spectra of the reaction10B(d, α)2α forE d =1.0-2.0 MeV. The excitation energy was found to be 12.0±0.4 MeV, and the reduced width 0.85±0.12 MeV. Differential crosssections of the (d, α 2)-reaction were deduced. 相似文献
72.
A.G. Clark P. Darriulat K. Eggert V. Hungerbühler P.M. Patel J. Strauss A. Zallo M. Banner T. Modis P. Perez J. Teiger C. Tur H. Zaccone A. Zylberstejn 《Nuclear Physics B》1979,160(2):397-425
We present a study of pp collisions producing large transverse momentum π0's. The data collected at c.m. energies √s=52.4 and 62.7 GeV, give evidence for a two-jet structure. The fragmentation of the jets is studied and correlations between the two jets are investigated. Results are compared with e+e? and νp data. 相似文献
73.
The interactions of deuterons with7Li, in which two α-particles and a neutron are produced in the final state are studied atE d =1.2 MeV. The dual parameter α-α coincidence spectrum was analyzed with a search program. The results indicate two excited states of5He: One at excitation energy 2.9±0.1 MeV and with a reduced width of γ2=1.1±0.4 MeV, and the other at 4.8±0.4 MeV, with γ2=0.9±0.4 MeV. No contributions of sequential decay through the 4+ state in8Be or direct three body decay was observed. 相似文献
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77.
Strauss M. Amendt P. Rostoker N. Ron A. 《IEEE transactions on plasma science. IEEE Nuclear and Plasma Sciences Society》1988,16(5):548-551
The application of distributed feedback by Bragg reflections in electron-beam channeling X-ray lasers is investigated. Expressions for low-threshold gain are derived for this cavity mirror structure in single crystals and are shown to have possible application in reducing beam high-current requirements by many orders of magnitude 相似文献
78.
79.
We consider solutions of the scalar wave equation vanishing on the boundary of an obstacle which undergoes periodic motion. In analogy with the Lax-Phillips theory, we show that the scattering matrix, as a function of frequency, is holomorphic in a lower half-plane, and meromorphic in an upper half-plane, provided rays are not trapped. The poles of the scattering matrix correspond to certain outgoing eigenfunctions, and there is a near-field expansion of finite energy solutions in terms of these eigenfunctions. 相似文献
80.
S. Roth G. Angloher I. Bavykina A. Brown C. Ciemniak G. Deuter F.v. Feilitzsch D. Hauff M. Hofmann J. Imber C. Isaila M. Kiefer H. Kraus J.-C. Lanfranchi B. Majorovits M. Malek V. Mikhailik F. Petricca W. Potzel K. Rottler K. Schäffner S. Scholl M.v. Sivers R. Strauss I. Usherov 《Progress in Particle and Nuclear Physics》2010,64(2):457-459
The current status of the direct Dark Matter experiments CRESST (Cryogenic Rare Event Search with Superconducting Thermometers) and the planned EURECA (European Underground Rare Event Calorimeter Array) is presented. Both experiments are aimed at the direct detection of WIMPs (Weakly Interacting Massive Particles), potential candidates for the Dark Matter in the universe. New design developments of the cryogenic detectors operated at mK temperatures are investigated to optimize detector performance and to simplify mass production. Thus, CRESST is also providing a basis for the EURECA project, aimed at a ton of cryogenic detectors with a multi-material target. 相似文献