Laser produced spectrum of Si2 molecule in the region of 540–1010 nm

The laser produced spectrum of Si2 molecule is recorded for the first time using laser ablation technique in the region of 540–1010 nm. About 110 bands are observed in the entire spectral region and all these bands are classified into three band systems, viz. E–X, F–X and G–X of Si2 molecule lying in the region of 814–1010 nm, 630–900 nm and 546–710 nm, respectively. All these electronic transitions take place from ground state X3Σg− state. The molecular constants of all these states have been determined.