Tag archives: electron microscope
By Hamish Johnston
Earlier this week the Physics World film crew was on Merseyside to document some of the exciting physics done in Liverpool and its environs. Our first stop was a meeting of the NA62 collaboration at the University of Liverpool that was organized by the particle physicist John Fry (above right with our cameraman David Hart).
The finishing touches are currently being put on the NA62 experiment, which will start up at CERN in Geneva next year. The international collaboration running the experiment will focus on making precise measurements of the decay of a charged kaon to a pion and two neutrinos. If all goes to plan, NA62 could find that the decay is not completely described by the Standard Model of particle physics, which could point towards new and exciting physics.
By James Dacey
Earlier this week my colleague reported the death of Heinrich Rohrer, the Swiss condensed-matter physicist who shared the 1986 Nobel Prize for Physics for the invention of the scanning tunnelling microscope (STM) at IBM’s Zürich Research Laboratory. Rohrer shared one half of the prize with his IBM colleague Gerd Binnig, while the other half went to the West German Ernst Ruska for his invention of the electron microscope (EM).
By bringing into view the atomic world, EMs and STMs have undoubtedly had a huge impact on science. Before their invention, optical microscopy had been a truly transformative technology. But it had been fundamentally limited to seeing things that are (roughly speaking) larger than the wavelength of the light used to produce the image. And since the wavelength of visible light is some 10,000 times larger than the typical distance between two atoms, we could not see individual atoms.