Sentences with phrase «called field emission»
Under a strong electric field, the cathode emits tight, high - speed beams of electrons through its sharp nanotube tips — a phenomenon called field emission.
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Depending on their size, so called near - fields (electromagnetic fields close to the particle surface) were induced by the laser pulses, resulting in a controlled directional emission of electrons.
David Allen, a University of Texas researcher who conducted measurements from natural gas fields to measure methane emissions, called the study an «important contribution.»
The observed Sgr A * emission is polarized and this means that it is produced by electrons gyrating around magnetic field lines in so called synchrotron process.