10,809 research outputs found

    The effect of radioactive substances on sludge digestion

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    Bibliography: p. 40

    Status of Evidence for Neutrinoless Double Beta Decay

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    The present experimental status in the search for neutrinoless double beta decay is reviewed, with emphasis on the first indication for neutrinoless double beta decay found in the Heidelberg-Moscow experiment, giving first evidence for lepton number violation and a Majorana nature of the neutrinos. Future perspectives of the field are briefly outlined.Comment: 37 pages, latex, 23 figures, Published in Found. Phys. 32 (2002) 1181-1223 and Presented at Fourth Heidelberg International Conference on Dark Matter in Astro- and Particle Physics, DARK2002, Cape Town, South Africa, 4 - 9 February, 2002, eds. H.V. Klapdor-Kleingrothaus and R. Viollier, Springer-Verlag Heidelberg, (2002) 367-403 see Home Page of Heidelberg Non-Accelerator Particle Physics Group: http://www.mpi-hd.mpg.de/non_acc/buecher.html#DARK200

    Cross-Section Fluctuations in Chaotic Scattering

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    For the theoretical prediction of cross-section fluctuations in chaotic scattering, the cross-section autocorrelation function is needed. That function is not known analytically. Using experimental data and numerical simulations, we show that an analytical approximation to the cross-section autocorrelation function can be obtained with the help of expressions first derived by Davis and Boose. Given the values of the average S-matrix elements and the mean level density of the scattering system, one can then reliably predict cross-section fluctuations

    Search for neutrinoless double beta decay with enriched 76Ge in Gran Sasso 1990-2003

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    The results of the HEIDELBERG-MOSCOW experiment which searches with 11 kg of enriched 76Ge for double beta decay in the GRAN Sasso underground laboratory are presented for the full running period August 1990 - May 2003. The duty cycle of the experiment was ~80%, the collected statistics is 71.7 kg y. The background achieved in the energy region of the Q value for double beta decay is 0.11 events/ kg y keV. The two-neutrino accompanied half-life is determined on the basis of more than 100 000 events. The confidence level for the neutrinoless signal has been improved to 4.2 sigma.Comment: 19 pages, latex, 9 figures, 2 table

    Meta-State conversion

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    In MIMD (Multiple Instruction stream, Multiple Data stream) execution, each processor has its own state. Although these states are generally considered to be independent entities, it is also possible to view the set of processor states at a particular time as single, aggregate, Meta State. Once a program has been converted into a single finite automaton based on Meta States, only a single proram counter is needed. Hence, it is possible to duplicate the MIMD execution using SIMD (Single Instruction stream, Multiple Data stream) hardware without the ovehead of interpretation or even of having each processing element keep a copy of the MIMD code. In this paper, we present an algorithm for Meta-State Conversion (MSC) and explore some properties of the technique
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