EPR and Optical Absorption Spectral Investigations of Cu²⁺ in Bi₂O₃-ZnO-B₂O₃-Li₂O Glasses

Table 1

EPR and optical parameters of the glass system (60-𝑥)Bi₂O₃-25ZnO-15B₂O₃-𝑥Li₂O.

Parameters	𝑥=15	𝑥=10	𝑥=5	𝑥=0
𝑔||	2.337	2.332	2.333	2.312
𝑔⟂	2.127	2.127	2.079	2.056
𝐴||×10^−4(cm^−1)	160	114	108	99
𝐴⟂ ×10^−4(cm^−1)	49	60	48	55
𝜆 (nm)	717	712	719	727
Δ𝐸𝑥𝑦 (cm^−1)	13947	14044	13908	13755
𝛼^2	0.875	0.743	0.707	0.651
𝛽^21	0.803	0.939	0.980	0.986
𝛽^2	0.656	0.797	0.837	0.909
Γ𝜎 (%)	27	56	63	76
Γ𝜋 (%)	39	12	3	2
Λth	0.954	0.963	0.973	0.982