Momentum vector correlation maps for three-particle fragmentation of neutral triatomic hydrogen near its ionization threshold

Fechner, P. C.; Helm, H.

doi:10.1103/physreva.82.052523

Cited by 7 publications

(19 citation statements)

References 28 publications

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“…segments chosen such that the statistical uncertainty of events in each segment stays below 10%. 12 The event density in each segment is corrected for geometric detection efficiency. 2 For the segment at the boundary of the circle at j = 0,120, 2401, the perfectly linear case see Fig.…”

Section: Experiments and Resultsmentioning

confidence: 99%

Imaging of spatial many-body wave functions via linear momentum measurements

Fechner

Helm

2014

Phys. Chem. Chem. Phys.

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The equivalence of a complete characterization of linear momenta of fragments from a many-body fragmentation process and the spatial wave function of the many-body system is discussed. Our experiment on three-body dissociation of state selected H3 and D3 molecules into ground-state hydrogen atoms strongly suggests the existence of such a close relationship as it is also predicted by theory in the form of the imaging theorem. We conclude that prudent imaging of many-body fragmentation provides a laboratory view of the squared many-body wave function at a spatial scale of molecular dimensions at which fragments exit into the realm of independent free particles.

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Section: Experiments and Resultsmentioning

confidence: 99%

Imaging of spatial many-body wave functions via linear momentum measurements

Fechner

Helm

2014

Phys. Chem. Chem. Phys.

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“…These are molecules in the metastable 2p 2 A 2 state in a variety of vibrational levels, their rotational state being N = 0 (as only these levels are metastable [9]), and long-lived molecules in Rydberg states 3 . The geometrical dimensions of the Stark-field section are given in [7]. For the measurements with H 3 a slightly different Stark-field section with bigger electrodes has been used; see Fig.…”

Section: Experiments and Methodsmentioning

confidence: 99%

“…with high principal quantum numbers, n 6 [7]. Here we concentrate on molecules in the metastable 2p 2 A 2 state.…”

Section: Experiments and Methodsmentioning

confidence: 99%

“…1 we apply a high electric field, localized over a 3 mm long spatial region, to induce dissociation by Stark-mixing of the long-lived states with energetically close-lying short-lived 2sA 1 levels [7,8]. After dissociation the fragments fly through a 2.40 m drift length before impinging on the position-and time-sensitive detector.…”

Section: Experiments and Methodsmentioning

confidence: 99%

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Momentum vector correlations in three-particle fragmentation of triatomic hydrogen

et al. 2011

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The correlation pattern in the center of mass motion of the three fragments from dissociation of well-defined Rydberg states of H 3 and D 3 is studied. Dissociation of the molecules is induced by an external electric field. Through a comparison with results obtained in radiative cascading we can show that the correlation pattern is that of the short-lived 2s 2 A 1 electronic state, of which a tiny amplitude is admixed by the external electric field. A comparison of our results with the predictions by M. Lehner and M. Jungen [J. Phys. B 42, 065101 (2009)] and U. Galster [Phys. Rev. A 81, 032517 (2010)] for predissociation of the 2s 2 A 1 state is made. We show that the experimental vector correlation maps are direct images of the spatial symmetry of the product of the vibrational wave function and spatial dependence of the nonadiabatic coupling operator.

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“…[15][16][17] By contrast, techniques using fast ion beam targets a) strasser@huji.ac.il allow direct detection of neutral fragments, produced in the moving molecular frame of reference, due to initial velocity in the laboratory frame. [18][19][20][21][22] Continetti and co-workers integrated VMI photoelectron imaging with a fast anion beam setup for neutral fragment imaging, allowing it to disentangle KER spectra originating from different neutral electronic states initiated by photodetachment from an anion precursor. 23,24 Ben-Itzhak and co-workers developed a photofragment spectrometer combined with a fast cation beam for coincidence detection, resolving cationic and neutral dissociation products.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous 3D coincidence imaging of cationic, anionic, and neutral photo-fragments

Shahi

Albeck

Strasser

2018

Review of Scientific Instruments

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We present the design and simulations of a 3D coincidence imaging spectrometer for fast beam photofragmentation experiments. Coincidence detection of cationic, neutral, and anionic fragments involves spectrometer aberrations that are successfully corrected by an analytical model combined with exact numerical simulations. The spectrometer performance is experimentally demonstrated by characterization of four different channels of intense 800 nm pulse interaction with F: F + F photodissociation, F + F dissociative photodetachment, F + F dissociative ionization, and F + F coulomb explosion. Improved measurement of F photodissociation with a 400 nm photon allows a better determination of the F anion dissociation energy, 1.256 ± 0.005 eV.

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Momentum vector correlation maps for three-particle fragmentation of neutral triatomic hydrogen near its ionization threshold

Cited by 7 publications

References 28 publications

Imaging of spatial many-body wave functions via linear momentum measurements

Imaging of spatial many-body wave functions via linear momentum measurements

Momentum vector correlations in three-particle fragmentation of triatomic hydrogen

Simultaneous 3D coincidence imaging of cationic, anionic, and neutral photo-fragments

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