Measurements of sub-nanosecond lifetimes from biphotonic fluorescence produced by nanosecond laser pulses

✍ Scribed by K.Razi Naqvi; D.K. Sharma; G.J. Hoytink

• Publisher: Elsevier Science
• Year: 1973
• Tongue: English
• Weight: 290 KB
• Volume: 22
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(73)80079-x

✦ Synopsis

When the absorption of light from nanosecond laser pulses gives rise to a short-lived biphotonic fluorescence the lifetime of the crcitcd state can be derived from the dependence of the intensity of the fluorescence on the energy of the laser pulse. The results of investigations by Miller and Pfliiger on cryptocyanine in methanol and glycerol are trscd to illustrate the principle of the method. An analysis of their data leads to a lifetime for the lowest singlet CYcited state of about 15 pscc and 200 psec for methanol and glycerol, respectively.