atom n. 1.原子。 2.微粒;微量。 chemical atoms 原子。 physical atoms 分子。 have [there is] not an atom of 一點(diǎn)也沒(méi)有。 break to atoms 粉碎 (The vase was broken to atoms. 花瓶敲得粉碎)。
The quantum field theory method in electron-atom collision 量子場(chǎng)論方法在電子與分子碰撞中的應(yīng)用
atom collision factor 原子碰撞因子
We also experimentally observed the effect of sodium atom-molecular collisions and sodium atom-atom collisions on the line-shape and intensity of fluorescence spectra . in addition, the optically pumped infrared stimulated emission and energy transfer up-conversion process are observed in pr3 + : y2sio5, and with the threshold energy, temperature dependence and divergence angle for the stimulated radiation are measured 此外還研究了摻雜在固體y_2sio_5中的pr~(3+)的光泵紅外受激輻射和能量轉(zhuǎn)移上轉(zhuǎn)換,分別測(cè)得了紅外受激輻射的閾值能量和發(fā)散角,并擬合得出了能量轉(zhuǎn)移速率。