Scanning pulsed-polarization spectrometer applied to Na_2

Taylor, Antoinette; Jones, K. M.; Schawlow, A. L.

doi:10.1364/josa.73.000994

Cited by 48 publications

(8 citation statements)

References 15 publications

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“…Potential energy curves for the states Χ 1Σ+g , Α1 Σ+u , B 1Πu and (2) 1Πg were taken from Refs. [12][13][14][15][16]. We assumed that μXA, μAR and μRB do not depend substantially on the internuclear distance, what is a reasonable approximation for the limited range of R sampled by the wave packets.…”

Section: Methods Of Calculationsmentioning

confidence: 99%

On the Method of Monitoring of Classical Vibrations in Sodium Dimer

Kowalczyk

Radzewicz

1991

Acta Phys. Pol. A

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Section: Methods Of Calculationsmentioning

confidence: 99%

On the Method of Monitoring of Classical Vibrations in Sodium Dimer

Kowalczyk

Radzewicz

1991

Acta Phys. Pol. A

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“…The absorption of two laser photons induces transitions from the v" = 0 level in the electronic ground state to vibrational levels between the v*= 11 to v*= 18 in the H-state. Using the known spectroscopic constants [26,27] the vibrational spacings can be calculated. They range from 89.7 to 94.1 cm -1 and agree with the frequencies obtained from the Fourier analysis (Fig.…”

Section: Wave Packet Motion In the 2 Llig-statementioning

confidence: 99%

“…Four electronic states are incorporated in our study. The corresponding potential energy curves, taken from [24,26,30,31] are drawn in Fig. 4.…”

Section: X(1e; ) Pump a (127 + ) Pump 2 1hgmentioning

confidence: 99%

Femtosecond time-resolved molecular multiphoton ionization and fragmentation of Na2: experiment and quantum mechanical calculations

Engel

Baumert

Meier

et al. 1993

Z Phys D - Atoms, Molecules and Clusters

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Abstract. We present a comparison between experimental and theoretical results for pump/probe multiphoton ionizing transitions of the sodium dimer, initiated by femtosecond laser pulses. It is shown that the motion of vibrational wave packets in two electronic states is probed simultaneously and their dynamics is reflected in the total Na~ ion signal which is recorded as a function of the time delay between pump and probe pulse. The time dependent quantum calculations demonstrate that two ionization pathways leading to the same final states of the molecular ion exist: one gives an oscillating contribution to the ion signal, the other yields a constant background. From additional measurements of the Na+-transient photofragmentation spectrum it is deduced that another ionization process leading to different final ionic states exists. The process includes the excitation of a doubly excited bound Rydberg state. This conclusion is supported by the theoretical simulation.

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“…3 on overview spectrum for the total Na~ and the total Na ÷ ion yield, the h vz laser being scanned. Since only the line positions were of interest here and a rapid scan was intended, [8,9,11,[13][14][15][16]. Two types of processes leading to Na + fragments are indicated: a four photon process via dissociation of the molecular ionic ground state, giving fast Na + and a three photon process leading to direct dissociative ionisation via the ionic continuum, producing slow Na ÷ the laser intensity was not kept constant during these measurements and was significantly higher than used for the KETOF spectra displayed below.…”

Section: Overviewmentioning

confidence: 99%

“…By comparison with literature data [13] for the 3s3da2~g and the We select specific vibrational levels of these identified series by maximising the Na~ signal, keep the laser frequencies fixed and record the ion signal in the KETOF mode as a function of time. An example of the KETOF raw data for the 3s3d 12;g v=36 as intermediate state Characteristic for the REMPI resonances discussed here, Fig.…”

Section: Overviewmentioning

confidence: 99%

Case studies in multiphoton ionisation and dissociation of Na2

Haugstätter

Goerke

Hertel

1990

Z Phys D - Atoms, Molecules and Clusters

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Atoms, MoleculesZeitschrift a n d C l u s t e r s ffJr Physi k D © Springer -Verlag 1990 Case studies in multiphoton ionisation and dissociation of Na2 Dissociative ionisation of Na2 via the 3s 3d 1Sg and 1//g states has been studied in the near threshold energy regime up to 120 meV above the three particle (Na ÷ +Na(3s) + e-) break up limit. A pulsed, cold molecular beam, pulsed laser 2 colour 3 photon resonantly enhanced multiphoton ionisation, and kinetic energy analysis of the fragments by a time of flight method (KETOF) is used. As series of vibrational levels in the two intermediate 3s 3d Rydberg states are excited, slow Na + fragments are observed with a maximum kinetic energy given by the excess energy of the 2 + 1 photon process above threshold, thus confirming a direct dissociative ionisation process. The intensity distribution of the Na + fragments shows a very pronounced maximum at zero kinetic energy, its shape differing somewhat for the 1Sg and ~Hg intermediate states. Also observed is a strong signal of fast fragments arising from a typical 4 photon process which leads to dissociation of Na~ molecules in their electronic ground state.

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Scanning pulsed-polarization spectrometer applied to Na_2

Cited by 48 publications

References 15 publications

On the Method of Monitoring of Classical Vibrations in Sodium Dimer

On the Method of Monitoring of Classical Vibrations in Sodium Dimer

Femtosecond time-resolved molecular multiphoton ionization and fragmentation of Na2: experiment and quantum mechanical calculations

Case studies in multiphoton ionisation and dissociation of Na2

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