Laser control of X-ray output
In harmonic generation a short pulse of intense radiation is focussed into a gas of atoms. The laser-atom interactions are highly nonlinear, and a number of the input photons effectively combine to ge...
Single molecules demonstrate resolving power
However, the resolution possible with scanning near-field optical microscopy (NSOM), as this approach is called, is essentially limited by the size of the aperture. To improve the resolution it is nec...
New tools for X-rays
Klaus Dieter Liss from the European Synchrotron Radiation Facility in Grenoble, France, and colleagues have created a cavity that traps X-ray photons between two thin plates of silicon (Nature 404 371...
New head for ESRF
Stirling is no stranger to Grenoble, having worked at the nearby Institut Laue-Langevin (ILL) neutron source for 14 years, and later chairing the ILL scientific council. He currently uses X-rays from ...
New synchrotron will be built at Rutherford
Construction of the new synchrotron is expected to take about five years, and it will cost about £550 m to build and operate the machine over its 20 year lifetime. The Wellcome Trust will contrib...
Measuring decoherence in real time
Quantum particles such as electrons can be in a superposition of two or more quantum states. This means that an electron can, for instance, be in two places at the same time. However, classical object...
Helium beam moves into sharper focus
Physicists have tried for years to develop a beam of atoms that could be focused as easily as electrons and photons. The helium atoms are fired at 1 km/s through a micron diameter nozzle past a set of...
Ultrafast X-rays watch matter melt
The germanium sample was bombarded with powerful laser pulses to excite the electrons and cause thermal melting. In this process, unlike normal melting, the metallic crystal goes from a cold solid to ...
NASA plans astrometric mission
Like ESA’s recent Hipparcos mission, FAME will use the parallax method to determine the stars’ positions: as the telescope and the Earth orbit the sun, the position of the stars will chang...
Chemical physicist wins Nobel chemistry prize
Prior to Zewail’s work chemists had thought that chemical reactions occurred on the same time scale as molecular vibrations — that is, on the femtosecond scale. In the late 1980s, Zewail d...
