✦ LIBER ✦

The direct overtone pumping of polyatomic molecules

✍ Scribed by Karen L. Bintz; Donald L. Thompson; K.L. Kompa; R.D. Levine

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 482 KB
Volume: 215
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(93)85702-p

No coin nor oath required. For personal study only.

✦ Synopsis

The fs solid state tunable lasers that are becoming available operate at peak power in the near infrared (say, 700-l 100 run). We present a computation of the classical power spectrum of CHsONO at this frequency range in order to elucidate the factors that determine the absorption cross section. Fast pumping and an initially already excited molecule are two factors that significantly enhance the probability of a direct (CH) overtone transition. For a molecule in its ground state using continuous wave pumping the cross section for overtone transitions is significantly smaller as compared to the isolated CH chromophore. We attribute this to a dilution, by IVR, of the optically bright mode. The time constant for this is such that fs pumping can access the de facto isolated CHr group.

📜 SIMILAR VOLUMES

Model calculation on the pump-probe meas

Model calculation on the pump-probe measurement of ultrafast electronic population decay in polyatomic molecules

✍ W. Domcke; H. Köppel 📂 Article 📅 1987 🏛 Elsevier Science 🌐 English ⚖ 763 KB

We consider the common situation of strong vibronic coupling of an optically bright (in absorption from the ground state) excited electronic state to a lower-lying dark electronic state in a polyatomic molecule. It is shown that for sufficiently short pump and probe laser pulses a time-resolved expe

On the electronic structure of polyatomi

On the electronic structure of polyatomic molecules

✍ L. Scheire; P. Phariseau 📂 Article 📅 1974 🏛 Elsevier Science 🌐 English ⚖ 209 KB

In this paper we extend the well-known MS Xa method for the calculation of the electronic structure of molecules enclosed in the Watson-sphere to the case of an arbitrarily shaped outer surface. A general formalism is discussed. In r&ent years considerable progress has been made in calculating the

The onset of Coulomb explosions in polya

The onset of Coulomb explosions in polyatomic molecules

✍ D. J. Smith; K. W. D. Ledingham; R. P. Singhal; T. McCanny; P. Graham; H. S. Kil 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 151 KB

With the development of high intensity femtosecond lasers, the ionisation and dissociation dynamics of molecules has become an area of considerable interest. Using the technique of femtosecond laser mass spectrometry (FLMS), the molecules carbon disulphide, pyrimidine, toluene, cyclohexanone and ben

On the dynamics of multiphoton dissociat

On the dynamics of multiphoton dissociation of polyatomic molecules

✍ Klaus Dieter Hänsel 📂 Article 📅 1978 🏛 Elsevier Science 🌐 English ⚖ 528 KB

LIF imaging applied to the photodissocia

LIF imaging applied to the photodissociation of polyatomic molecules

✍ G. Grünefeld; P. Andresen 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 973 KB

The photodissociation of HN03 at 193 nm and of NO2 at 308 nm in a nozzle beam is used to test the potential of LIF imaging techniques for the state selective detection of angular and velocity distributions of the photofragments NO and OH. The dissociation laser and the probe laser are spatially dela

High-resolution quantum beat spectroscop

High-resolution quantum beat spectroscopy in the electronic ground state of a polyatomic molecule by IR—UV pump—probe method

✍ Th. Walther; H. Bitto; J.Robert Huber 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 321 KB

By introducing the IR-UV pump-probe technique to detect molecular quantum beats, this phenomenon is utilized as a Doppler-free time domain spectroscopy for the electronic ground state. The technique is demonstrated with Stark quantum beats of vibrationally excited So levels to determine the electric