排序方式: 共有39条查询结果,搜索用时 31 毫秒
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R. Hingmann H.-G. Clerc C.-C. Sahm D. Vermeulen K.-H. Schmidt J.G. Keller 《Nuclear Physics A》1983,404(1):51-57
A new α-line with Eα = 9.912±0.020 MeV is assigned to an isomeric state in 216Th. It decays with a half-life of . There are indications for a dominating γ-branch. 相似文献
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Katrin Paschke Christian Fiebig Gunnar Blume Alexander Sahm Daniel Jedrzejczyk David Feise Götz Erbert 《Optical Review》2014,21(1):75-78
We demonstrate diode laser modules with high spectral radiance larger than 1 GW/cm2/sr/nm in the visible spectral range. These highly brilliant laser light sources enable the development of next-generation 3D displays. About 1W output power from small-sized modules was achieved at 635 nm by direct diode laser emission and at 530 nm using single pass second harmonic generation (SHG) of a highly brilliant near-infrared laser diode. 相似文献
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Christian Fiebig J?rg Fricke Mirko Uebernickel Daniel Jedrzejczyk Alexander Sahm Katrin Paschke 《Optical Review》2012,19(6):405-408
Large-area high-resolution displays, using a flying-spot to create the picture, require light sources in the red, green and blue wavelength range with a high optical output power and nearly diffraction limited beam. In this paper we present experimental results of high-brightness distributed Bragg reflector tapered diode lasers at 106x nm that can be used for single-pass second harmonic generation into the green. Based on these lasers we developed compact (2.5 cm3) green laser modules with an output power of 1W at 53x nm and an electro-optical conversion efficiency of about 5%. The output power stability is better than 2% and the wavelength stability is ±10 pm. The excellent beam quality M ?? 2 < 2 of the green light allows operation in flying spot application systems. Furthermore, we estimate that our concept allows power scaling up to 2W by using nonlinear planar waveguide crystals and into the multi-watt level by spectral beam combining. 相似文献
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G. Münzenberg W. Reisdorf S. Hofmann Y. K. Agarwal F. P. Heßberger K. Poppensieker J. R. H. Schneider W. F. W. Schneider K. -H. Schmidt H. -J. Schött P. Armbruster C. -C. Sahm D. Vermeulen 《Zeitschrift für Physik A Hadrons and Nuclei》1984,315(2):145-158
An experiment to synthesize element 109 is presented. Decay patterns characteristic of complete fusion products were searched for in an irradiation of209Bi targets with58Fe projectiles at specific incident energies of 4.95, 5.05, and 5.15 MeV/u. A total dose of 7 ×1017 particles was obtained. The experimental method involves in-flight separation of forward peaked reaction products with a static-field velocity filter, their passage through a time-of-flight device and their final implantation into position sensitive solid state detectors to measure their kinetic energy, approximate mass and their time and position of incidence. The subsequent decay of the narrowly localised reaction products by cascades of alpha particles and/or spontaneous fission is also registered in terms of the energies and times of all the emitted particles. One outstanding decay sequence that started with the emission of two alpha particles within subsequent time intervals of 5 ms and 22 ms and ended with spontaneous fission after 13 s was found at 5.15 MeV/u. The first alpha particle had a kinetic energy of (11.10±0.04) MeV. A detailed analysis of all the alternative interpretations of this observation, such as a purely random correlation of signals, the decay of a product from a transfer reaction or of any of the various energetically possible evaporation residues, shows that the isotope with mass 266 of element 109, i.e. the one neutron evaporation channel after complete fusion, is the statistically most significant assignment. The outlook for new element synthesis is also briefly discussed. 相似文献
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T Hermann W Pfefferle C Baumann E Busker S Schaffer M Bott H Sahm N Dusch J Kalinowski A Pühler A K Bendt R Kr?mer A Burkovski 《Electrophoresis》2001,22(9):1712-1723
By the use of different Corynebacterium glutamicum strains more than 1.4 million tons of amino acids, mainly L-glutamate and L-lysine, are produced per year. A project was started recently to elucidate the complete DNA sequence of this bacterium. In this communication we describe an approach to analyze the C. glutamicum proteome, based on this genetic information, by a combination of two-dimensional (2-D) gel electrophoresis and protein identification via microsequencing or mass spectrometry. We used these techniques to resolve proteins of C. glutamicum with the aim to establish 2-D protein maps as a tool for basic microbiology and for strain improvement. In order to analyze the C. glutamicum proteome, methods were established to fractionate the C. glutamicum proteins according to functional entities, i.e., cytoplasm, membranes, and cell wall. Protein spots of the cytoplasmic and membrane fraction were identified by N-terminal sequencing, immunodetection, matrix assisted laser desorption/ionization-time of flight-mass spectrometry (MALDI-TOF-MS) and electrospray ionization-mass spectrometry (ESI-MS). Additionally, a protocol to analyze proteins secreted by C. glutamicum was established. Approximately 40 protein spots were observed on silver-stained 2-D gels, 12 of which were identified. 相似文献
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C. -C. Sahm H. -G. Clerc K. -H. Schmidt W. Reisdorf P. Armbruster F. P. Heßberger J. G. Keller G. Münzenberg D. Vermeulen 《Zeitschrift für Physik A Hadrons and Nuclei》1984,319(2):113-118
The energy dependence of the fusion probabilities for central collisions of the systems124Sn +92,94,96Zr and86Kr +123Sb was determined from neutron-evaporation-residue cross sections. Near the barrier as calculated from one-dimensional barrier-penetration models, the fusion probability was found to be reduced by several orders of magnitude. 相似文献