The Photodetachment Microscope

Blondel, Christophe; Delsart, C.; Dulieu, F.

doi:10.1103/physrevlett.77.3755

Cited by 190 publications

(189 citation statements)

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“…In this method, the onset of the photodetachment process is measured directly using a tunable laser source. In combination with improved methods for the measurement of the photoelectron kinetic energies such as photodetachment microscopy [21] and slow-electron velocity-map imaging [22], the technique of laser photodetachment at threshold represents the most precise way of determining photodetachment thresholds experimentally [23]. Amongst the recent applications of photodetachment microscopy, let us cite the first experiment realized in phosphorus [24] with the excitation of the parent neutral atom out of the fundamental spectral term, and the measurement of the electron affinity of selenium with an accuracy of 1 µeV [25] .…”

Section: Introductionmentioning

confidence: 99%

Isotope shift on the chlorine electron affinity revisited by an MCHF/CI approach

Carette

Godefroid

2013

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

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Abstract. Today, the electron affinity is experimentally well known for most of the elements and is a useful guideline for developing ab initio computational methods. However, the measurements of isotope shifts on the electron affinity are limited by both resolution and sensitivity. In this context, theory eventually contributes to the knowledge and understanding of atomic structures, even though correlation plays a dominant role in negative ions properties and, particularly, in the calculation of the specific mass shift contribution. The present study solves the longstanding discrepancy between calculated and measured specific mass shifts on the electron affinity of chlorine [Phys. Rev. A 51, 231 (1995)].

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Section: Introductionmentioning

confidence: 99%

Isotope shift on the chlorine electron affinity revisited by an MCHF/CI approach

Carette

Godefroid

2013

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

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“…Section 5 then describes recent progress in PFI-ZEKE photoelectron spectroscopy and presents a detailed discussion of the resolution limit of this technique. Section 6 presents the techniques of photodetachment microscopy (Blondel et al 1996; and of slow-electron velocity-map imaging (Osterwalder et al 2004a). These techniques, originally developed to study photodetachment processes in anions, may also find important applications in high-resolution photoelectron spectroscopic studies of neutral molecules.…”

Section: Introductionmentioning

confidence: 99%

“…19b), two interference patterns are recorded, one produced by the electrons emitted by the laser beam crossing the anion beam before, the other after reflection of the laser beam by a concave mirror. In this way, undesirable Doppler shifts can be eliminated by taking the average of the kinetic energies derived from the two interference patterns (see Blondel et al (1996; for details).…”

mentioning

confidence: 99%

“…Photodetachment microscopy, developed by Blondel, Delsart and their coworkers (Blondel et al 1996;, Chaibi et al 2006 and illustrated in Fig. 19 represents a particularly elegant method of measuring the kinetic energy of slow electrons emitted above a photodetachment threshold.…”

mentioning

confidence: 99%

“…LPT remains widely used in electron affinity measurements. In combination with improved measurement methods of the photoelectron kinetic energies such as photodetachment microscopy (Blondel et al 1996) and slow-electron velocity-map imaging (Osterwalder et al 2004a), LPT represents the most precise way of determining photodetachment thresholds experimentally and can be used to resolve the rotational structure in the photodetachment spectra of molecular anions , Osterwalder et al 2004a). …”

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confidence: 99%

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High‐resolution Photoelectron Spectroscopy

Merkt

Willitsch

Hollenstein

2011

Handbook of High‐resolution Spectroscopy

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The evolution of photoelectron spectroscopy of neutral molecules in the gas phase, from its first applications in the early 1960s to the present day, is reviewed with emphasis on the description of methods that have contributed to the improvement of resolution. In the early days, photoelectron spectroscopy was very successfully used to study the electronic structure of molecules. As the resolution improved, the emphasis gradually shifted to studies of the structure and dynamics of molecular cations. Current methods enable one to fully resolve the rotational structure in the photoelectron spectra of polyatomic molecules and even to measure the fine and hyperfine structures of positively charged atoms and small molecules. Several of the methods providing high resolution make use of the long lifetimes and electric‐field‐ionization properties of high Rydberg states and give access to detailed information on molecular ionization channels and molecular photoionization.

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Photodetachment of hydrogen negative ion near inelastic surfaces: Arbitrary laser polarization direction

Iqbal

Afaq

Amjad

2015

Int J of Quantum Chemistry

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The photodetachment of hydrogen negative ion H 2 near different inelastic surfaces is investigated by the semiclassical closed orbit theory for arbitrary laser polarization direction h L .A two-term formula of photodetachment cross section consisting of a smooth background term and an oscillatory term is derived. The oscillatory term contains an extra angular factor cos 2 ðh L Þ that describes the dependence of oscillations in total cross section on the laser polarization direction. It is observed that the amplitude of oscillations in cross section reaches maximum at h L 50 when laser polarization is parallel to the z-axis and it approaches zero as the laser polarization direction becomes perpendicular to the z-axis. It is also observed that as the reflection coefficient a, which accounts for the inelastic behavior of the surfaces, increases the amplitude of oscillation also increases.

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The Photodetachment Microscope

Cited by 190 publications

References 19 publications

Isotope shift on the chlorine electron affinity revisited by an MCHF/CI approach

Isotope shift on the chlorine electron affinity revisited by an MCHF/CI approach

High‐resolution Photoelectron Spectroscopy

Photodetachment of hydrogen negative ion near inelastic surfaces: Arbitrary laser polarization direction

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