Knowledge Bank

The emission spectrum of YC1 molecule has been re--investigated in the spectral region $\lambda \lambda$ 3545 --- $4825A\circ$ and $\lambda \lambda$ 5950 --- 6700 $A\circ$ using high temperature vacuum graphite furnace. The spectrum has been photographed at a reciprocal linear dispersion of $3.5A\circ /mm$ at about a temperature of $2200\circ C$ in an atmosphere of argon. The study reveals the presence of a single system of bands in ultraviolet region but two system of bands in the blue-violet region. The Janney system $(\lambda \lambda$ 6300 --- 6930 $A\circ )$ was also found to extend in lower region upto $\lambda 5950A\circ$. The analysis was confirmed by the presence of isotope effect for $Y35C1$ and $Y37C1$ in the bands of C --- X, D --- X and F --- X systems.