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Lifetime Measurements of the D1Π State of HfS and the b3Π1 State of HfO

✍ Scribed by Mattias Aldener; Annie Hansson; Anders Pettersson; Ulf Sassenberg

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
116 KB
Volume
216
Category
Article
ISSN
0022-2852

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✦ Synopsis

Lifetime measurements of individual rotational levels in excited states of hafnium oxide and hafnium sulfide have been performed using population probing by resonant two-photon ionization in a molecular beam. For the b 3 1 state of HfO rotational levels in the vibrational level v = 0 were found to have lifetimes in the region 650-700 ns. For the D 1 state of HfS rotational level lifetimes in the vibrational levels v = 0 and v = 1 were determined to be around 240 ns. The technique used here provides very accurate results and the uncertainty in the reported values is only about 2%. Possible sources of errors are examined. The absorption oscillator strengths from the ground state are calculated.

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