Time resolved high frequency spectrum of Br2 molecules using pulsed photoacoustic technique

The distribution of acoustic modes in PA cell having dimension L = 16 cm and R = 1.4 cm. The most clustering of the modes for this cavity is concentrated around 15 kHz, 27 kHz and 39 kHz. PA spectral of Br2 in PA cell (L = 16 cm and R = 1.4 cm).