Terahertz absorption spectrum of D2O vapor

✍ Scribed by B.L. Yu; Y. Yang; F. Zeng; X. Xin; R.R. Alfano

• Book ID: 104073136
• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 172 KB
• Volume: 258
• Category: Article
• ISSN: 0030-4018
• DOI: 10.1016/j.optcom.2005.07.078

✦ Synopsis

The absorption spectrum of D 2 O vapor from 0.2 to 2.0 THz (6.7-67 cm À1 ) which is associated with rotational modes was measured at one atmosphere using terahertz time-domain spectroscopy (THz-TDS). The linewidth and collisional dephasing times were measured for 26 pure rotational transitions in the ground vibrational state (0 0 0). The temperature dependence of the linewidth (Dm) behaves as Dm $ T À3/4 and the linewidth decrease with increasing temperature is attributed to the 1/r 6 force of interaction between colliding D 2 O molecules.