نتایج جستجو برای: noble gas
تعداد نتایج: 252530 فیلتر نتایج به سال:
A great majority of “interesting” compounds in fluorine and noble gas chemistry are thermodynamically unstable, highly oxidative and thus hard to isolate and characterize materials. Since the ultimate characterization structural determination is very often related to a route to crystalline products, the aforementioned unique properties severely restrict the choice of a solvent for these compoun...
0031-9007= We describe a nuclear spin gyroscope based on an alkali-metal –noble-gas comagnetometer. Optically pumped alkali-metal vapor is used to polarize the noble-gas atoms and detect their gyroscopic precession. Spin precession due to magnetic fields as well as their gradients and transients can be cancelled in this arrangement. The sensitivity is enhanced by using a high-density alkali-met...
Introduction: More than 80 fossil meteorites have been found in the ~4 m quarry layer of midOrdovician marine limestone in southern Sweden (Thorsberg quarry) [1, 2]. The analysis of noble gas data [2] in chromite grains from these meteorites has revealed a clear negative correlation between He, Ne concentrations and mass of the samples [3]. Similar correlation has been found also for cosmicray ...
nanostructures of noble metal materials have been used in organic solar cells for enhancement of performance and light trapping. in this study, we have introduced branched silver cauliflower-like nanopatterns as sub-wavelength structured metal grating in organic solar cells. self-assembled fabrication process of branched nanopatterns was carried out on a bio-template of cicada wing nanonipple a...
Science results from the Genesis Mission illustrate the major advantages of sample return missions. (i) Important results not otherwise obtainable except by analysis in terrestrial laboratories: the isotopic compositions of O, N, and noble gases differ in the Sun from other inner solar system objects. The N isotopic composition is the same as that of Jupiter. Genesis has resolved discrepancies ...
هدف این پایان نامه، بررسی رفتار داخلی یک تک حباب آوالیان است رفتار داخلی تک حباب حاوی گاز نجیب آوالیان به عنوان کره سختی که توسط یک پیستون کروی رانده می شود، الگو شده است. برای نیل به این هدف، ابتدا پدیده آوالیانسانی از حیث کیفی و کمی مورد بررسی قرار گرفته است. نیز شبیه سازی های صورت پذیرفته در این زمینه ارائه شده و بیان گردیده است که رویکرد مولکولی در قیاس یا رویکرد هیدرودینامیکی قابلیت بهتری ...
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