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压力对固体氩中杂质钠原子吸收光谱的影响

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摘要 利用等温等压系综Monte Carlo方法,在低温下(T=10K)研究了压力的变化(0~2.4GPa)对固氩掺钠体系中杂质钠原子吸收光谱的影响.对于替代数为nv=1和2两种掺杂体系,压力的增加都没有改变钠原子俘获点周围的局域对称性,只是减小了钠氩、氩氩之间的距离,使得体系更加致密.但压力的增大导致了钠原子的吸收谱逐渐变宽,峰位以及质心谱移向低能方向移动,即出现红移.对局域结构属于高对称俘获点nv=1的掺杂体系,在较低压力下,吸收谱为高对称三体线形.随着压力的增加,吸收谱开始变宽并移动,吸收谱重叠成单峰形状.对局域结构属于低对称性俘获点nv=2的掺杂体系,在较低压力下,吸收谱为单峰加双峰的吸收线形.随着压力的增大,单双峰之间的劈裂增大,双峰重合成单峰形状.
出处 《中国科学(G辑)》 CSCD 2004年第2期162-172,共11页
基金 国家自然科学基金-中国工程物理研究院联合基金(批准号: 10276016) 吉林大学创新基金 2003年度教育部优秀青年教师资助计划基金资助项目
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