| 单词 | gamma irradiation |
| 释义 | > as lemmasgamma irradiation 7. Physics. A gamma particle or ray; (as a mass noun) gamma radiation. Esp. in attributive and objective compounds, as gamma counter, gamma emitter, gamma-emitting adj., gamma irradiation, etc. Frequently written γ.See also gamma camera n. at Compounds 1c, gamma knife n. at Compounds 1c. ΚΠ 1919 Hahnemannian Monthly Mar. 191 The reason he commences with massive gamma irradiation is that too small a dosage stimulates cell proliferation. 1930 Nature 20 Dec. 953/2 Either a γ-quantum is emitted or one of the extra-nuclear electrons [is] thrown out of the atom. 1949 W. S. Eastwood Surv. Pile Made Isotopes 1 Sources of this kind have previously been confined to the natural gamma emitting elements. 1955 Jrnl. Amer. Chem. Soc. 77 802/1 It would not be detected by the γ-counters which were used for Ra-analysis. 1965 Bull. Amer. Metereol. Soc. 46 555 Here gammas from a source in one tube pulse through the snowpack to the other tube. 1971 Nature 12 Mar. 120/2 Corneas were first irradiated for 15 h in a γ-irradiator..delivering 1·2 × 105 rad/h. 2005 L. K. Massey Effect Sterilization Methods Plastics (ed. 2) 2/2 Plastic parts sterilized by electron beam are only exposed for minutes versus hours or days with gamma. < as lemmas |
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