Abstract:
With the aim of investigating the resonance system of NO,equivalent width calculation have been made for the 213.575nm,Q1(31.5)line of the 1-0 band of y-system of NO for the photospheric HSRA model,and for the line 214.012nm,Q1(25.5) line of the same band system for zwaan's (1974)sunspot model.calculation show that y-band system would not show up in the photospheric spectrum wheres a sunspot model yield an equivalent width of 72mA suggesting that sunspots may provide relatively more favourable conditions for the detections of the resonance systems of some abundant molecules in the inaccessible ultraviolet region.