Abnormal ionization in sonoluminescence*
Zhang Wen-Juana),b), An Yua)†
       
Variations of the reduced ionization energies of Ar atom (a), degrees of ionization (b), the values of absorption coefficient κ λ multiplied by the bubble radius R at λ = 310 nm (c), and 812 nm (d) with radial distance r inside a bubble, corresponding to the times (i.e., A , B , and C ) marked in Fig.  7 .