单词 | recoilless |
释义 | recoillessadj. 1. Having no or little recoil, not subjected to or affected by recoil; spec. (of a firearm or piece of ordnance) having the recoil reduced, typically by deflection of the combustion gases to the rear. ΘΚΠ society > armed hostility > military equipment > weapon > device for discharging missiles > firearm > [adjective] > others stocked1497 breeched1575 chambered1611 tower-proof1673 triggerless18.. hair-triggered1806 vizyless1828 high-velocity1854 sighted1859 calibred1887 recoilless1888 sham-damn1895 silenced1909 silencered1935 multicalibre1983 1888 O. E. Michaelis tr. E. Monthaye Krupp & De Bange iii. 59 The mortars are mounted on specially constructed recoil-less carriages. 1890 Times 1 Feb. 7 The assumed existence of a noiseless powder was ridiculed as a thing equally impossible with a recoilless powder. 1946 R. Ingersoll Top Secret ii. vii. 177 Recoil-less cannon that a man can hold in one hand..we had by the end of even our little war. 1953 Times 28 May 5/4 Both the United States and the French armies have produced admirable recoilless guns since 1946. 1975 Times 10 Apr. 8/7 Mortar and recoilless rifle fire has been used against the international airport. 2007 Internat. Jrnl. (Nexis) Spring The..soldiers fired a variety of weapons, including..an M-72 light antitank weapon (a single-use recoilless anti-tank projectile). 2. Physics. Designating absorption or emission of a particle by an atomic nucleus bound in a crystal lattice that occurs without appreciable recoil (recoil n. 6) of the nucleus. Also: relating to or exhibiting such phenomena.Recoilless absorption was originally described by Rudolf Mössbauer in 1958: see Mössbauer n. ΘΚΠ the world > matter > physics > atomic physics > decomposition of light, spectrum > study of spectra > types of spectrometry or spectroscopy > [adjective] > mössbauer recoilless1959 1959 Physical Rev. Lett. 3 556 (title) Recoilless resonance absorption of gamma rays in Fe57. 1974 Nature 19 Apr. 638/2 The energy of the γ photon assures that a high probability of recoil-less transitions will result even at room temperature. 2003 Physics Lett. A. 311 68/1 The fraction of recoilless nuclei is then obtained in the so-called Debye-Waller (DW) form..by simply expressing, in terms of the mean-square displacement of the nuclei, the unmodulated part of the spectrum. 2007 Microporous & Mesoporous Materials 100 221/1 We made a systematic study..using 119Sn Mössbauer spectroscopy, which is based on the recoilless emission and absorption of γ-ray photons. This entry has been updated (OED Third Edition, June 2009; most recently modified version published online March 2022). < adj.1888 |
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