Migration of radionuclides in a gas cooled solid state spallation target

Neutronic Analysis Studies of the Spallation Target Window for a Gas Cooled Ads Concept

Some design options for transmutation devices are under consideration, one of them includes a window target cooled by eutectic Lead Bismuth for a gas cooled transmutation core. In this paper we will show the neutronic calculations that we have performed to obtain the heat deposition in the target material, the neutron flux produced in the target and the radiation damage in the structural materi...

Dose Coefficients for Radionuclides Produced in a Spallation Neutron Source

critical period effects in foreign language learning:the influence of maturational state on the acquisition of reading,writing, and grammar in english as a foreign language

since the 1960s the age effects on learning both first and second language have been explored by many linguists and applied linguists (e.g lennerberg, 1967; schachter, 1996; long, 1990) and the existence of critical period for language acquisition was found to be a common ground of all these studies. in spite of some common findings, some issues about the impacts of age on acquiring a second or...

Solid State Gas Sensor Research in Germany – a Status Report

This status report overviews activities of the German gas sensor research community. It highlights recent progress in the field of potentiometric, amperometric, conductometric, impedimetric, and field effect-based gas sensors. It is shown that besides step-by-step improvements of conventional principles, e.g. by the application of novel materials, novel principles turned out to enable new marke...

A buffer-gas cooled Bose-Einstein condensate

We report the creation of a Bose-Einstein condensate using buffer-gas cooling, the first realization of BEC using a broadly general method which relies neither on laser cooling nor unique atom-surface properties. Metastable helium (He*) is buffer-gas cooled, magnetically trapped, and evaporatively cooled to quantum degeneracy. 10 atoms are initially trapped, leading to Bose-Einstein condensatio...