Calculation of EL2 Energy Level and Optical Cross Section
EL2能级和光电离截面的计算

The energy level and wave function of EL2 defect model have been calculated by usingthe EHT.The cluster contains 41 atoms,The secular equation is reduced by using group theory.The opcical cross section associated with EL2 has also been calculated.The theoretical results are in agreement the experimental results.