| 单词 | excited state |
| 释义 | > as lemmasexcited state e. Physics. Of an atom or an orbiting electron, or a nucleus, molecule, etc.: not in its ground state; able to lose energy by emitting electromagnetic radiation or a particle; excited state, a state of a quantized system having more energy than the ground state. ΘΚΠ the world > matter > physics > quantum theory > raising energy level, excitation > [adjective] > emitting energy excited1921 the world > matter > physics > quantum theory > raising energy level, excitation > [noun] > state of lowest level > higher level than excited state1921 1921 Chem. Abstr. 15 3931 Recent researches..lead to the establishment of the existence of excited atoms in a metastable state. 1927 T. Verschoyle tr. A. E. Haas Atomic Theory 176 His observations..lead to an approximate value of 10—8 sec. for the mean duration of the excited state. 1938 R. W. Lawson tr. G. von Hevesy & F. A. Paneth Man. Radioactivity (ed. 2) ix. 99 Excited states have only a limited life, and..the energy surplus of the excited nuclei will gradually be emitted in the form of γ-rays. 1953 P. Morrison in E. Segrè Exper. Nucl. Physics II. vi. v. 63 The outgoing particles will in general take away only a small part of the excitation energy, leaving behind an excited residual nucleus. 1968 M. S. Livingston Particle Physics x. 170 We might expect the mesonic cloud surrounding a nucleon core to be capable of existing in excited states of higher energy..and to ‘radiate’ mesons. < as lemmas |
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