Formation and stabilities of cluster ions Ar+n
Formation and stabilities of cluster ions Ar+n
复制标题
簇离子 Ar n 的形成和稳定性
DOI：
10.1063/1.456245
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发表时间：
1989
影响因子：
4.4
通讯作者：
Toshiharu Mori
中科院分区：
文献类型：
--
作者：
K. Hiraoka;Toshiharu Mori
使用脉冲电子束质谱仪在300-55 K的温度范围内测量了簇合反应Ar+（2 P3/2）+2Ar=Ar+2（2 π +u）+Ar的速率常数的温度依赖性。速率常数随温度的降低而稳定增加，从300 K时的2.0×10−31 cm 6/s增加到55 K时的7×10−31 cm 6/s。发现亚稳态原子离子Ar+（2 P1/2）在130 K以下开始形成团簇离子Ar+2。还测定了团簇离子Ar+n（n=3-11）的热化学稳定性。在n=3和4之间观察到−Δ H 0 n −1，n值的突然下降，表明Ar+3离子是团簇Ar+n的核心。
Temperature dependence of the rate constants for the clustering reaction, Ar+(2P3/2)+2Ar=Ar+2(2Σ+u)+Ar, was measured in the temperature range 300–55 K using a pulsed electron‐beam mass spectrometer. The rate constant shows a steady increase with decrease of temperature, from 2.0×10−31 cm6/s at 300 K to 7×10−31 cm6/s at 55 K. The metastable atomic ion Ar+(2P1/2) was found to start to form the cluster ion Ar+2 below 130 K. The thermochemical stabilities of the cluster ions Ar+n were also determined with n=3–11. A sudden drop in the −ΔH0n−1,n values was observed between n=3 and 4, indicating that the Ar+3 ion is the core in the cluster Ar+n.