Observation of post-collision interaction (PCI) in HBr using two-dimensional photoelectron spectroscopy

Odling-Smee, M.K.; Sokell, Emma; Wills, A A; Hammond, P. R.

doi:10.1088/0953-4075/32/11/305

Cited by 12 publications

(8 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Note the decreasing influence of the PCI tail on the peaks for higher photon energies due to the higher kinetic energy of the photoelectron. This is in good agreement with a recent experimental study of the PCI effect in HBr [24]. In addition to the intense transitions from the vibrational ground state in the electronic ground state (v = 0) to the vibrational ground state in the ionized state (v = 0), weak transitions to the first vibrationally excited state in the ionized state (v = 0 → v = 1) can be seen, reflecting a small change in the equilibrium distance upon ionization.…”

Section: Resultssupporting

confidence: 93%

Cross sections and beta values for ligand-field-split Br 3d orbitals in HBr

Liu

Püttner

et al. 1999

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

The ligand field in HBr results in the splitting of the Br 3d orbitals into the 3d δ (d x 2 −y 2 , d xy ), 3d π (d xz , d yz ), and 3d σ (d z 2 ) orbitals. In core ionized HBr, the stronger spin-orbit splitting removes the remaining degeneracies and results in five different Br 3d eigenstates from linear combinations of the 3d δ , 3d π , and 3d σ orbitals. In high-resolution Br 3d photoelectron spectra, as presented in this work, these five peaks are resolved. The photoelectron cross sections and β values for the different d orbitals have been studied from 5 to 25 eV above threshold. The relative intensities for the different 3d orbitals are quite different at different analysis angles, showing that the β values are different. Multiple-scattering-Xα calculations give results in semiquantitative agreement with experiment.

show abstract

Section: Resultssupporting

confidence: 93%

Cross sections and beta values for ligand-field-split Br 3d orbitals in HBr

Liu

Püttner

et al. 1999

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

show abstract

“…The influence of the PCI effect on the Br 3d −1 photoelectron lines of HBr has been studied to date by Odling-Smee et al [51]. In their study the photon energy was varied while the influence of the kinetic energy of the individual Auger electron was not taken into account.…”

Section: A Deceleration Of the 3d −1 Photoelectron Caused By The Pcimentioning

confidence: 99%

Selectivity of the Br 3d−1 Auger decays in HBr

et al. 2018

View full text Add to dashboard Cite

The Auger decay of the spin-orbit and molecular-field split Br 3d −1 core holes in HBr is investigated, both by a photoelectron-Auger-electron coincidence experiment and by ab initio calculations based on the one-center approximation. The branching ratios for the Auger decay of the five different core-hole states to the 4p(σ, π) −2 dicationic final states are determined. Experimental and theoretical data are in good agreement and conform to results for the 4pπ −2 final states from a previous analysis of the high-resolution conventional Auger-electron spectrum. The branching ratios for the Br 3d −1 Auger decay to the 4p(σ, π) −2 with symmetry follow the propensity rule of L 2,3

show abstract

“…Therefore, with the assumption of sufficient experimental energy resolution all the above factors assume the possibility of measuring the energy shifts for the 2 S and 3 + u lines. Concerning the latter, note that the previous studies of the PCI effect in the molecules N 2 O [11] and HBr [12] showed that the theory developed for atomic targets [5,13] gives a satisfactory description of the data on the PCI.…”

Section: Introductionmentioning

confidence: 99%

Excitation dynamics and post-collision interaction for lowest autoionizing states in Li and Li₂excited by electron impact

Borovik¹,

Ogurtsov²

2010

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

The ejected-electron spectra in the region of the lowest autoionizing states in Li and Li 2 have been studied at an observation angle of 54.7 • over the electron-impact energy range 0-6 eV above the 1s 2 excitation threshold at 56.4 eV. The strong near-threshold resonance excitation has been revealed for the (1s → 2σ u ) 1,3 + u and (1s → 3σ g ) 1 + g molecular transitions. For the atomic (1s2s 2 ) 2 S, 1s(2s2p 1 P) 2 P and molecular (1s → 2σ u ) 3 + u states the post-collision interaction (PCI) energy shift of corresponding lines has been measured and compared with electron-impact excitation functions for these states. The general appearance of the PCI data for the ( 1 P) 2 P and 3 + u states reveals a close agreement with the classical and semi-classical predictions, showing a minimal correlation between resonance excitation of the 1s 2 subshell and the PCI. Meanwhile, in the energy region of 0-1 eV the energy shift of the (1s2s 2 ) 2 S line reveals an abrupt decrease to nearly zero values, similar to that observed earlier for the (np 5 (n+1)s 2 ) 2 P 3/2 lines in the ejected-electron spectra of Na (n = 2) and K (n = 3) atoms. The calculations show the possibility for extrema of the PCI shift to appear in those energy regions where the negative-ion resonances are present in the excitation function of the 2 S state.

show abstract

Observation of post-collision interaction (PCI) in HBr using two-dimensional photoelectron spectroscopy

Cited by 12 publications

References 25 publications

Cross sections and beta values for ligand-field-split Br 3d orbitals in HBr

Cross sections and beta values for ligand-field-split Br 3d orbitals in HBr

Selectivity of the Br 3d−1 Auger decays in HBr

Excitation dynamics and post-collision interaction for lowest autoionizing states in Li and Li₂excited by electron impact

Contact Info

Product

Resources

About

Observation of post-collision interaction (PCI) in HBr using two-dimensional photoelectron spectroscopy

Cited by 12 publications

References 25 publications

Cross sections and beta values for ligand-field-split Br 3d orbitals in HBr

Cross sections and beta values for ligand-field-split Br 3d orbitals in HBr

Selectivity of the Br 3d−1 Auger decays in HBr

Excitation dynamics and post-collision interaction for lowest autoionizing states in Li and Li2excited by electron impact

Contact Info

Product

Resources

About

Excitation dynamics and post-collision interaction for lowest autoionizing states in Li and Li₂excited by electron impact