thermal-neutron detector
61star — starless, adj. /stahr/, n., adj., v., starred, starring. n. 1. any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night. 2. Astron. any of the large, self luminous, heavenly bodies, as the sun, Polaris,… …
62Helium atom scattering — (HAS) is a surface analysis technique used in materials science. HAS provides information about the surface structure and lattice dynamics of a material by measuring the diffracted atoms from a monochromatic helium beam incident on the sample.… …
63Beryllium — (pronEng|bəˈrɪliəm) is a chemical element with the symbol Be and atomic number 4. A bivalent element, beryllium is a steel grey, strong, light weight yet brittle alkaline earth metal. It is primarily used as a hardening agent in alloys, most… …
64Cosmic ray — For the film, see Cosmic Ray (film). Cosmic radiation redirects here. For some background types of cosmic radiation, see cosmic background radiation and cosmic background. The energy spectrum for cosmic rays Cosmic rays are energetic charged… …
65Guy Tavernier — (29 mai 1924 à Charleroi – 7 octobre 1996 à Louvain), physicien nucléaire belge qui fit plusieurs découvertes en physique atomique et physique des particules et fut le Père du nucléaire belge et en partie international.… …
66Nuclear technology — A residential smoke detector is the most familiar piece of nuclear technology for some people Nuclear technology is technology that involves the reactions of atomic nuclei. Among the notable nuclear technologies are nuclear power, nuclear… …
67Black hole — For other uses, see Black hole (disambiguation). Simulated view of a black hole (center) in front of the Large Magellanic Cloud. Note the gravitat …
68Wave–particle duality — Quantum mechanics Uncertainty principle …
69dating — I In geology and archaeology, the process of determining an object s or event s place within a chronological scheme. Scientists may use either relative dating, in which items are sequenced on the basis of stratigraphic clues (see stratigraphy) or …
70Atom — The atom is the smallest unit of an element that retains the chemical properties of that element. An atom has an electron cloud consisting of negatively charged electrons surrounding a dense nucleus. The nucleus contains positively charged… …
