Velocity distributions in high density gadolinium atomic beam produced with axial electron beam gun
Velocity distributions in high density gadolinium atomic beam produced with axial electron beam gun
复制标题
轴向电子束枪产生的高密度钆原子束的速度分布
DOI：
10.1080/18811248.1992.9731635
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发表时间：
1992
影响因子：
1.2
通讯作者：
T. Shibata
中科院分区：
文献类型：
--
作者：
A. Nishimura;H. Ohba;T. Shibata
用多普勒频移技术和多普勒限制吸收光谱分别测量了用轴向电子束产生的Gd原子束的平行和垂直速度分布。激光照射区的原子密度为1018~1019个原子/立方米，足以用于原子蒸气激光同位素分离等过程。通过蒸发面附近的自由膨胀，获得了800m/S的原子束速度。然而，这个速度比我们在以前的实验中用磁性横向电子束枪测得的速度慢了100m/S。讨论了实验中速度比上一次慢的原因。随着沉积速率的增加，平行平移温度迅速下降到200K，而垂直平移温度逐渐升高并接近平行平移温度。这一结果表明，这两个平移的碰撞区域。
The parallel and perpendicular velocity distributions of a gadolinium atomic beam produced with an axial electron beam gun have been measured by a Doppler-shift technique and a Doppler limited absorption spectroscopy, respectively. The atomic density of 1018~1019atoms/m3 at a laser irradiated zone was sufficient for the process, such as an atomic vapor laser isotope separation. The atomic beam velocity of 800 m/s was obtained by a free expansion near an evaporation surface. This velocity, however, was 100 m/s slower than that we had measured with a magnetic transverse electron beam gun in a previous experiment. The reasons for the slower velocity in this experiment than that in the previous one are discussed. In keeping with the deposition rate, the parallel translational temperature rapidly decreased to 200 K, while the perpendicular translational temperature gradually increased and approached to the parallel translational temperature. This result suggested that the collisional region where both translat...