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Mullins, Oliver C.; Chien, Ring‐Ling; Hunter, John E.; Keller, James S.; Berry, R. Stephen

doi:10.1103/physreva.31.321

Cited by 35 publications

(23 citation statements)

References 38 publications

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“…Equation (16) contains the usual isolated-core approximations but is cast in a form more amenable to MQDT manipulations. We now combine the two pieces (15) and (16) …”

Section: Jpmentioning

confidence: 99%

Angular distributions of ejected electrons from autoionizing 3pndstates of magnesium

et al. 1992

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We have measured the angular distributions of electrons ejected from doubly excited autoionizing Rydberg 3pnd J =1 and 3 states of magnesium, where n =10-18. To excite the aligned 3snd 'D2 states of Mg, we used two dye lasers crossed with an atomic beam. A third laser, linearly polarized in the same direction as the other two, excited the atoms in the 3snd states to the 3pnd states. The angular distributions of ejected electrons are given by dtrldQ=+"akPI, (cos8)i, where k =0,2, 4, 6. We measured the angular distribution parameters aj, as a function of the energy of the third laser photon using an electron detector and a Mg ion detector. We compare our results with the predictions of an 8-matrix multichannel quantum-defect theory. We find good agreement between experiment and theory.PACS number(s): 34.50. Lf, 32.80.Rm, 32.80.Dz, 82.50.Fv

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“…Equation (16) contains the usual isolated-core approximations but is cast in a form more amenable to MQDT manipulations. We now combine the two pieces (15) and (16) …”

Section: Jpmentioning

confidence: 99%

Angular distributions of ejected electrons from autoionizing 3pndstates of magnesium

et al. 1992

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“…[1][2][3][4][5][6][7][8][9][10] As a probe of chemical dynamics, PADs are promising as a sensitive tool to track changes in electronic surfaces as a chemical reaction is evolving. The nature of the excited state is uniquely imprinted on the continuum electron partial waves as interference patterns measured in the PAD.…”

Section: Introductionmentioning

confidence: 99%

“…By simultaneously measuring the photoelectron energy and angular distribution, a more complete understanding of the excited state relaxation and photoionization dynamics is determined. 6,7 Each autoionizing state has associated with it a characteristic Fano profile index, q, spectral width, and resonance energy, for which there is reported information from higher resolution spectral techniques. The pump-probe experiments investigated here prepare and subsequently ionize aligned targets.…”

Section: Introductionmentioning

confidence: 99%

Photoelectron angular distributions from autoionizing 4s14p66p1 states in atomic krypton probed with femtosecond time resolution

Doughty

Haber

Hackett

et al. 2011

The Journal of Chemical Physics

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Photoelectron angular distributions (PADs) are obtained for a pair of 4s(1)4p(6)6p(1) (a singlet and a triplet) autoionizing states in atomic krypton. A high-order harmonic pulse is used to excite the pair of states and a time-delayed 801 nm ionization pulse probes the PADs to the final 4s(1)4p(6) continuum with femtosecond time resolution. The ejected electrons are detected with velocity map imaging to retrieve the time-resolved photoelectron spectrum and PADs. The PAD for the triplet state is inherently separable by virtue of its longer autoionization lifetime. Measuring the total signal over time allows for the PADs to be extracted for both the singlet state and the triplet state. Anisotropy parameters for the triplet state are measured to be β(2)=0.55 ± 0.17 and β(4)=-0.01 ± 0.10, while the singlet state yields β(2)=2.19 ± 0.18 and β(4)=1.84 ± 0.14. For the singlet state, the ratio of radial transition dipole matrix elements, X, of outgoing S to D partial waves and total phase shift difference between these waves, Δ, are determined to be X=0.56 ± 0.08 and Δ=2.19 ± 0.11 rad. The continuum quantum defect difference between the S and D electron partial waves is determined to be -0.15 ± 0.03 for the singlet state. Based on previous analyses, the triplet state is expected to have anisotropy parameters independent of electron kinetic energy and equal to β(2)=5∕7 and β(4)=-12∕7. Deviations from the predicted values are thought to be a result of state mixing by spin-orbit and configuration interactions in the intermediate and final states; theoretical calculations are required to quantify these effects.

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“…[6][7][8][9][10][11] In the atomic case, alignment of orbital angular momentum serves the same purpose as alignment of molecular axes, and a number of laser-based studies have shown that achieving this through photoexcitation prior to photoionization can lead to a PAD with exquisite sensitivity to the angular momentum composition of the intermediate state. [12][13][14] However, although systematic studies have been performed in which different intermediate electronic states are prepared, generally only a single ionic electronic state has been accessible in each case.…”

Section: Introductionmentioning

confidence: 99%

Effect of electronic angular momentum exchange on photoelectron anisotropy following the two-color ionization of krypton atoms

et al. 2016

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Angular distributions of photoelectrons from excited valence1,3P1

Cited by 35 publications

References 38 publications

Angular distributions of ejected electrons from autoionizing 3pndstates of magnesium

Angular distributions of ejected electrons from autoionizing 3pndstates of magnesium

Photoelectron angular distributions from autoionizing 4s14p66p1 states in atomic krypton probed with femtosecond time resolution

Effect of electronic angular momentum exchange on photoelectron anisotropy following the two-color ionization of krypton atoms

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