| 单词 | daughter particle |
| 释义 | > as lemmasdaughter particle d. In sense 8, as daughter atom, daughter element, daughter isotope, daughter particle, daughter product, etc.See also daughter nucleus n. (b) at Compounds 3. ΚΠ 1915Daughter elements [see sense 8]. 1933 O. H. Blackwood et al. Outl. Atomic Physics xii. 219 The atomic weight of radium is 226, and the daughter atom should be four units lighter because of the loss of an alpha particle. 1948 Adv. in Biol. & Med. Physics 1 145 Unless sufficient time elapses before measurement to permit daughter isotopes..to decay away, false conclusions will be derived as to the behavior of the parent. 1955 Gloss. Terms Radiol. (B.S.I.) 6 The atom containing the original nucleus is sometimes called the parent atom and the resulting atom the decay product or daughter atom. 1962 Newnes Conc. Encycl. Nucl. Energy 176/2 The decay products of a radioactive element are often referred to as its daughter products. 1991 S. F. Mason Chem. Evol. iv. 46 The heavier extinct radioisotopes which have left stable daughter isotopes in overabundance were probably generated in a nearly supernova explosion. 2007 J. T. O. Kirk Sci. & Certainty iii. 99 Angular momentum must be conserved so if one daughter particle has spin +½ the other must have spin -½. < as lemmas |
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