Optical spectroscopy of Na3 by two-photon ionization in a supersonic molecular beam

Herrmann, André; Hofmann, M.; Leutwyler, Samuel; Schumacher, Ernst; Wöste, L.

doi:10.1016/0009-2614(79)80162-1

Cited by 136 publications

(21 citation statements)

References 11 publications

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“…2.1, several ultrafast molecular processes are conceivable, including intramolecular vibrational redistribution (IVR) as observed in the gas-phase, 42,43,45,67 intersystem-crossing or vibrational relaxation induced by the helium droplets, as observed with helium droplet-formed alkali trimers. 7,31 The fact that the Q s mode has not been observed in cw spectra of Na 3 in the gasphase 38,68 nor with mixed rubidium-potassium trimers formed on helium nanodroplets 12 points at a fast intramolecular process, presumably IVR, to cause the fast decay of the Q s -signal.…”

Section: The Rb 3 Trimermentioning

confidence: 99%

Homo- and heteronuclear alkali metal trimers formed on helium nanodroplets. Part II. Femtosecond spectroscopy and spectra assignments

Giese

Stienkemeier

Mudrich

et al. 2011

Phys. Chem. Chem. Phys.

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Homo-and heteronuclear alkali quartet trimers of the type K 3−n Rb n (n = 0, 1, 2, 3) formed on helium nanodroplets are probed by one-color femtosecond photoionization spectroscopy. The obtained frequencies are assigned to vibrations in different electronic states by comparison to high level ab initio calculations of the involved potentials including pronounced Jahn-Teller and spin-orbit couplings. Despite the fact that the resulting complex vibronic structure of the heavy alkali molecules complicates the comparison of experiment and theory we find good agreement for many of the observed lines for all species.

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Section: The Rb 3 Trimermentioning

confidence: 99%

Homo- and heteronuclear alkali metal trimers formed on helium nanodroplets. Part II. Femtosecond spectroscopy and spectra assignments

Giese

Stienkemeier

Mudrich

et al. 2011

Phys. Chem. Chem. Phys.

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“…The reason for this tremendous interest is, that small clusters are relatively easy to handle theoretically [5] as well as experimentally [6,7]. Compared to simple molecules, however, the complexity of the clusters is sufficient to receive new insight into phenomena like catalysis [8][9][10], solvation [11], reactivity [12][13][14][15], energy transfer [16] or fragmentation [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Ultrafast photodissociation of Kn=3...9 clusters

Ruff

Rutz

Schreiber

et al. 1996

Z Phys D - Atoms, Molecules and Clusters

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By means of femtosecond pump and probe technique we investigated the temporal evolution of the photodissociation of excited potassium clusters (3 ≤ n ≤ 9). For three different excitation energies E = 1.47 eV, 2.00 eV, and 2.94 eV we were able to measure the transient multiphoton ionization spectra. In the frame of a simple energy level model the photodissociation process could be analyzed. Fragmentation time constants are estimated to be cluster size-and energydependent in the range of 200 fs up to 10 ps. The results are compared with data received from similar experiments on Na n clusters.

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“…Whereas resonance enhanced multiphoton ionization has provided a wealth of information for various organic substances, trimers are the largest metal clusters which have been successfully studied via this technique [6,7]. Extremely rapid relaxation of the excited electronic states of larger metal clusters is suspected to account for this failure, and multiphoton ionization is often observed to result in dissociative ionization [83.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the stabilities of neutral and ionic lead and lead-antimony clusters under single and multiphoton ionization conditions

Farley

Ziemann

Castleman

1989

Z Phys D - Atoms, Molecules and Clusters

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The fluence dependence of lead cluster ion distributions at 222 nm and 308 nm reveal markedly different behavior. Results obtained at 308 nm display a simple uniform increase in intensity with higher laser fluence with tittle change in relative intensities. At 222 rim, however, a significant transformation is found from a markedly different low fluence distribution to a high fluence pattern, which is essentially indistinguishable from that observed at 308 nm. It is concluded that mass spectra obtained at 308 nm, regardless of fluence, or at 222 nm and high fluence contain appreciable contributions from fragmentation. Hence, under these conditions the mass spectra are found to be dominated by cluster ion stabilities. Magic numbers observed at both high and low fluence correspond well to those obtained using electron-impact ionization, and in many instances parallel the magic numbers characteristic of rare-gas clusters. This suggests the stabilities of both neutral and monovalent cationic lead clusters are largely determined by closepacking considerations, and are not appreciably influenced by electronic structure. Similar preferences for close-packed structures are also found for mixed lead-antimony clusters containing one or two antimony atoms that are ionized using high fluence 308 nm excitation.

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Optical spectroscopy of Na3 by two-photon ionization in a supersonic molecular beam

Cited by 136 publications

References 11 publications

Homo- and heteronuclear alkali metal trimers formed on helium nanodroplets. Part II. Femtosecond spectroscopy and spectra assignments

Homo- and heteronuclear alkali metal trimers formed on helium nanodroplets. Part II. Femtosecond spectroscopy and spectra assignments

Ultrafast photodissociation of Kn=3...9 clusters

Investigation of the stabilities of neutral and ionic lead and lead-antimony clusters under single and multiphoton ionization conditions

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