中文摘要：

应用微正则系综理论研究一个三能级的顺磁性系统。通过引入极值条件和对三能级系统进行二能级近似的方法,计算了系统的微正则配分函数,研究了系统的磁化性质,结果表明,两种近似方法得到的结果一致。

英文摘要：

The magnetization of a three-level of paramagnetic solid has been studied on microcanonical ensemble. By introducing extreme condition and using the approximate method for a three-level system,the micro-canonical partition function of the system has been calculated approximately,and the result shows that two approximate calculations is consistent.