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磷原子形成的奇数和偶数团簇离子的信号存在明显的强度差异.当团簇离子尺寸n>25时,奇数团簇离子的信号强度一般会远远超过其邻近的偶数团簇离子.为更好地理解团簇尺寸对这一现象的影响,本文通过真空中激光溅射红磷的方法,利用质谱对磷团簇离子进行了研究和分析.结果表明这种方法可以产生较大尺寸(n～500)的磷团簇离子.进一步对团簇离子的强度分布进行分析表明:随着正负离子团簇尺寸的增加,奇/偶数离子强度差异都会逐渐减小.根据它们的变化趋势,可以预测:当n>1000时,奇/偶数离子强度交替的现象可能会消失.这一结果正反映出团簇在从原子演变到凝聚态物质过程中的桥梁作用.
There is a significant intensity difference between the signals of odd and even cluster ions formed by phosphorus atoms.When the cluster ion size n> 25, the signal intensity of odd cluster ions generally far exceeds that of their neighboring even cluster ions. In order to understand the effect of cluster size on this phenomenon, we use mass spectrometry to study and analyze phosphorus cluster ions by means of laser sputtering of red phosphorus in vacuum.The results show that this method can produce large size (n ~ 500) .Further analysis of the intensity distribution of the cluster ions showed that: with the increase of the size of the positive and negative ions, the difference between the odd / even ion intensity will decrease gradually.According to their changing tendency, we can predict : The phenomenon of alternating odd / even ion intensities vanishes when n> 1000. This result is a reflection of the bridge’s role as a cluster in the evolution from atom to condensed matter.