Directed Flow in 158 A GeV 208Pb^{208}Pb + 208Pb^{208}Pb Collisions

The directed flow of protons and positive pions have been studied in 158 A GeV Pb + Pb collisions. A directed flow analysis of the rapidity dependence of the average transverse momentum projected onto the reaction plane is presented for semi-central collisions with impact parameters of approximately 8 fm, where the flow effect is largest. The magnitude of the directed flow is found to be significantly smaller than observed at AGS energies and than RQMD model predictions.The directed flow of protons and positive pions have been studied in 158 A GeV Pb + Pb collisions. A directed flow analysis of the rapidity dependence of the average transverse momentum projected onto the reaction plane is presented for semi-central collisions with impact parameters of approximately 8 fm, where the flow effect is largest. The magnitude of the directed flow is found to be significantly smaller than observed at AGS energies and than RQMD model predictions

Principles Of Sedimentation

xii;ill.;673hal.;21c

Invertebrata paleontology

xvi, 511 p.; 23 cm

Toepassing van PC-CREAM in Nederland - Dosis als gevolg van lozingen in lucht

CREAM, een model om de radiologische consequenties van reguliere lozingen te bepalen, is ontwikkeld door National Radiological Protection Board (UK). PC-CREAM, de PC-implementatie van het model, is vergeleken met de Nederlandse richtlijn. Voor twee specifieke referentiesituaties en elf natuurlijk voorkomende radionucliden zijn de resultaten van de PC-CREAM software en die van RIVM-studies met elkaar vergeleken. Bovendien is de modellering van de submodellen in PC-CREAM bestudeerd en vergeleken met de Nederlandse richtlijn. De dosisschattingen voor lozingen in lucht met behulp van PC-CREAM in de twee referentiesituaties en elf radionucliden komen goed overeen met de resultaten van RIVM-studies. Om de radiologische gevolgen in andere relevante referentiesituaties te kunnen bepalen, zijn veranderingen en aanvullingen in de PC-CREAM-modellering voorgesteld.A methodology to assess the radiological impact of routine releases, CREAM, was developed at the National Radiological Protection Board (UK). The software implementation of that methodology to the PC platform, PC-CREAM, has been compared to the Dutch regulation guidelines. The results of the PC-CREAM software and previous RIVM studies are compared for two specific reference situations and eleven naturally occurring radionuclides. The methodology in the submodels in PC-CREAM is also studied and compared to the Dutch regulation guidelines. The assessment of the radiological impact for atmospheric releases using PC-CREAM showed good agreement with the results obtained in previous RIVM studies. Some changes and additions in the methodology are proposed to be able to calculate the radiological impact using PC-CREAM in other relevant reference situations.DGMSVSSN