hollow atom

Look at other dictionaries:

• Hollow atoms — (discovered in 1990 by a French team of researchers around Clayton Kirk) are short lived multiply excited neutral atoms which carry a large part of their Z electrons (Z ... projectile nuclear charge) in high n levels while inner shells remain… …   Wikipedia

• Hollow cathode lamp — A hollow cathode lamp (HCL) is type of lamp used in physics and chemistry as a spectral line source and as a frequency tuner for light sources such as lasers.An HCL usually consists of a glass tube containing a cathode, an anode, and a buffer gas …   Wikipedia

• Particle accelerator — Atom smasher redirects here. For other uses, see Atom smasher (disambiguation). A 1960s single stage 2 MeV linear Van de Graaff accelerator, here opened for maintenance A particle accelerator[1] is a device that uses electromagnetic fields to… …   Wikipedia

• Nuclear weapon design — The first nuclear weapons, though large, cumbersome and inefficient, provided the basic design building blocks of all future weapons. Here the Gadget device is prepared for the first nuclear test: Trinity. Nuclear weapon designs are physical,… …   Wikipedia

• Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics       Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity.       Computer scientist Manindra Agrawal of the… …   Universalium

• Kevin Bacon — Pour les articles homonymes, voir Bacon. Kevin Bacon …   Wikipédia en Français

• hole — holeless, adj. holey, adj. /hohl/, n., v., holed, holing. n. 1. an opening through something; gap; aperture: a hole in the roof; a hole in my sock. 2. a hollow place in a solid body or mass; a cavity: a hole in the ground. 3. the excavated… …   Universalium

• performing arts — arts or skills that require public performance, as acting, singing, or dancing. [1945 50] * * * ▪ 2009 Introduction Music Classical.       The last vestiges of the Cold War seemed to thaw for a moment on Feb. 26, 2008, when the unfamiliar strains …   Universalium

• industrial glass — Introduction       solid material that is normally lustrous and transparent in appearance and that shows great durability under exposure to the natural elements. These three properties lustre, transparency, and durability make glass a favoured… …   Universalium

• Fullerene — Buckminsterfullerene C60 (left) and carbon nanotubes (right) are two examples of structures in the fullerene family …   Wikipedia