If the two gamma-quanta emitted on the annihilation of a slowly moving positron-electron pair both undergo a Compton scattering, in view of the fact that they are polarized in perpendicular directions ...

Small and medium-sized or modular reactors are an option to fulfil the need for flexible power generation for a wider range of users and applications. Small modular reactors, deployable either as ...

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Expedition 73 crewmembers sequenced DNA and worked with virtual reality glasses this week, while also continuing to unpack cargo vehicles and congratulating NASA's 24th group of astronaut candidates.