| 释义 |
collisional, a.|kəˈlɪʒənəl|
[f. collision + -al1.]
Pertaining to collision; colliding.
1884Pharmaceutical Jrnl. XV. 319/1 The mutual action at a distance, repulsive or attractive according to the mutual aspect of the two bodies when passing within collisional distance of one another. 1947Nature 11 Jan. 59/2 It is possible to estimate the collisional frequency of the electrons with the neutral atoms. 1957F. Hoyle Black Cloud viii. 152 The ionization of the atmospheric gases at a height of about fifty miles turned out to be abnormally high. This was giving rise to an excessive amount of collisional damping, as the radio engineers called it. 1969Nature 16 Aug. 727/1 Direct collisional excitation of the forbidden lines will be unimportant.
Hence coˈllisionally adv., by a collision or collisions, esp. between atoms.
1968Austral. Jrnl. Physics XXI. 505 A collisionally excited nebula. 1970Nature 25 Apr. 354/1 The resulting excited H2O is strongly collisionally de-excited by other H2O molecules. 1981Sci. Amer. Nov. 84/3 The width and the very low opacity of the bright ring may reflect the collisionally induced spreading of its larger particles over the age of the solar system. |