resonance transition
41Dynamic mechanical analysis — Dynamic Mechanical Analyzer Acronym DMA Classification Thermal analysis Manufacturers Bose Electroforce Group, Mettler Toledo, Netzsch Instruments, PerkinElmer, TA Instruments, Triton Technology Ltd, Gabo Other techniques Related Isothermal… …
42Nobel Prizes — ▪ 2009 Introduction Prize for Peace The 2008 Nobel Prize for Peace was awarded to Martti Ahtisaari, former president (1994–2000) of Finland, for his work over more than 30 years in settling international disputes, many involving ethnic,… …
43HORLOGES ATOMIQUES — Les horloges atomiques utilisent des transitions entre des niveaux d’énergie bien définis de certains atomes. Leur développement, depuis les années 1950, fait appel à la conjonction de plusieurs disciplines. Il résulte, d’une part, des… …
44Charge-transfer complex — A charge transfer complex (CT complex) or electron donor acceptor complex is an association of two or more molecules, or of different parts of one very large molecule, in which a fraction of electronic charge is transferred between the molecular… …
45Niobium — zirconium ← niobium → molybdenum V ↑ Nb ↓ Ta …
46Mössbauer effect — The Mössbauer effect, or recoilless nuclear resonance fluorescence, is a physical phenomenon discovered by Rudolf Mössbauer in 1958. It involves the resonant and recoil free emission and absorption of γ radiation by atomic nuclei bound in a… …
47chemical compound — Introduction any substance composed of identical molecules consisting of atoms (atom) of two or more chemical elements (chemical element). All the matter in the universe is composed of the atoms of more than 100 different chemical elements …
48literature — /lit euhr euh cheuhr, choor , li treuh /, n. 1. writings in which expression and form, in connection with ideas of permanent and universal interest, are characteristic or essential features, as poetry, novels, history, biography, and essays. 2.… …
49SPECTROSCOPIE - Spectroscopie des radiofréquences — La spectroscopie des radiofréquences, ou spectroscopie hertzienne, désigne l’ensemble des études effectuées sur les phénomènes d’interaction résonante entre les atomes ou les molécules et les ondes hertziennes, c’est à dire les ondes… …
50speech — /speech/, n. 1. the faculty or power of speaking; oral communication; ability to express one s thoughts and emotions by speech sounds and gesture: Losing her speech made her feel isolated from humanity. 2. the act of speaking: He expresses… …
