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Qian, Hui; Takami, Michio

doi:10.1023/a:1004626121451

Cited by 21 publications

(15 citation statements)

References 11 publications

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“…We have attributed this behavior to the fact that, in condensed helium, only the outer ns 1 electronic shell of the dopant atom is perturbed strongly by the interaction with the surrounding helium bulk, while the * peter.moroshkin@unifr.ch † www.unifr.ch/physics/frap/ inner (n − 1)d 10 electrons of Au and Cu are screened by the outer shell and only are perturbed weakly. A similar effect was observed earlier in experimental studies [5,6] of inner-shell transitions in the rare-earth elements thulium and europium in liquid and solid He.…”

Section: Introductionsupporting

confidence: 88%

Laser ablation and spectroscopy of copper in liquid and solid4He

2011

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We present an experimental study of the laser-induced fluorescence spectra of Cu atoms in bulk liquid and solid helium matrices as well as in the dense plasma created by the laser ablation of copper in liquid helium. We observe transitions of the valence electron and of inner-shell electrons. The former produce structureless line shapes, a large broadening, and a blueshift. The latter practically are not shifted with respect to the free atom and possess a substructure consisting of a zero-phonon line and phonon wings. We suggest a qualitative interpretation of the observed spectra based on the atomic bubble model that takes the lifting of the |M J | degeneracy due to the bubble deformation and matrix-phonon interactions into account.

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Section: Introductionsupporting

confidence: 88%

Laser ablation and spectroscopy of copper in liquid and solid4He

2011

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“…1 Narrower bands were recorded for the near-UV transitions of neutral a) Electronic mail: john.mccaffrey@nuim.ie europium atoms embedded in helium droplets 5 and isolated in bulk liquid helium. 6 This is consistent with the much weaker interactions that arise with helium and a host environment where well defined sites of isolation do not exist. The occurrence of bubble formation in the excited states of metal atoms in liquid helium is now a well-documented phenomenon.…”

Section: Introductionsupporting

confidence: 64%

In situ formation and characterisation of singly ionised atomic europium in rare gas matrices—Luminescence spectroscopy and MP2 calculations

Byrne

Davis

McCaffrey

2015

The Journal of Chemical Physics

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Irradiation of atomic europium isolated in the solid rare gases, with low intensity laser excitation of the y 8 P ← a 8 S resonance transition at ca. 465 nm, is found to produce singly charged europium cations (Eu + ) in large amounts in xenon and in smaller amounts in argon. Confirmation of the formation of matrix-isolated Eu + is obtained from characteristic absorption bands in the UV and in the visible spectral regions. The luminescence produced with excitation of the cation bands is presented in greatest detail for Eu/Xe and assigned. Excitation of the 4f 7 ( 8 S 7/2 )6p 3/2 absorption bands of Eu + between 390 and 410 nm produces emission which is quite distinct from that resulting from excitation of the 4f 7 ( 8 S 7/2 )6p 1/2 absorption (430 to 450 nm) features. The latter consists of narrow, resolved emission bands with Stokes shifts ten times smaller than the former. The observed spectral differences are discussed in relation to the different spatial symmetries of the p 3/2 and p 1/2 orbitals in these j-j coupled (7/2, 3/2) J and the (7/2, 1/2) J levels. Møller-Plesset calculations are conducted to obtain the molecular parameters of the neutral Eu-RG and cationic Eu (2011)], the interaction potentials calculated herein for the Eu-RG diatomics suggest that the neutral Eu atom occupies tetra-vacancy (tv) and hexa-vacancy (hv) sites in the solid rare gas hosts. Possible reasons for the facile production of Eu + in the solid rare gases are discussed. The mechanism proposed is that atomic europium is also acting as an electron acceptor, providing a temporary trap for the ionised electron in the matrices. C 2015 AIP Publishing LLC. [http://dx

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“…2, 3 In our recent experiments, 1, 4-6 we have addressed transitions between the filled inner (n − 1)d-shell and the outer ns-shell of Cu (n=4) and Au (n=6) atoms, as well as a 5d6s -6s 2 transition of Ba. It was found that the spectral lines of gold and copper follow the same trend as the inner-shell transitions of the lanthanides with pronounced zero-phonon lines (ZPL) and phonon wing (PW) structures.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopy of Mn atoms isolated in solid 4He

Moroshkin

Lebedev

Weis

2014

The Journal of Chemical Physics

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We present an experimental study of the laser-induced luminescence spectra of Mn atoms in solid helium matrices. We observe transitions of the valence electron and of inner-shell electrons. We find that the Mn-He interaction perturbs the inner-shell transitions to a lesser extent than the valence-electron transitions. The observed lineshapes of the inner-shell transitions of Mn are similar to those of an inner-shell transition in Ba studied earlier. At the same time, they are more strongly perturbed than the corresponding transitions in Au and Cu under the same conditions. We suggest a qualitative explanation of these observations based on the atomic bubble model. Our results also suggest that the inner-shell transitions of Mn in solid He are more strongly perturbed than the same lines of Mn isolated in solid Ar or Kr matrices.

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Untitled

Cited by 21 publications

References 11 publications

Laser ablation and spectroscopy of copper in liquid and solid4He

Laser ablation and spectroscopy of copper in liquid and solid4He

In situ formation and characterisation of singly ionised atomic europium in rare gas matrices—Luminescence spectroscopy and MP2 calculations

Spectroscopy of Mn atoms isolated in solid 4He

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