Young-type interference patterns in electron emission spectra produced by impact of swift ions onH2molecules

Abstract

The existence of Young-type interference patterns, recently measured ͓N. Stolterfoht et al., Phys. Rev. Lett. 87, 023201 ͑2001͔͒ in double-differential cross sections for single-electron ionization of H 2 molecules by ion impact, is theoretically supported by calculations obtained using a molecular distorted-wave model introduced here. The importance of adequately describing the target as a molecule is emphasized. The contributions from direct and interference terms are separated.

Dissociative ionization of H2by fast protons: three-body break-up and molecular-frame electron emission

“…A theoretical CDW-EIS model [14,34] The electron angular distributions calculated within the CDW-EIS in the plane defined by the direction of the incoming projectile and the molecular axis are shown in Fig. 4, as a function of the polar electron emission angle relative to the initial projectile direction, for E e = 2.5 eV, 10 eV and 20 eV ("molecular calculation": solid lines).…”

“…Although these effects appear even for random orientation of the molecular axis, they are more pronounced in the molecular-frame electron angular distributions [9]. Recent experiments have shown the presence of interference effects in ion impact ionization of H 2 [13] and have triggered several calculations [14,15] but part of the information was lost since the orientation of the molecule with respect to the incident beam could not be determined. Second, coincident ion momentum spectra have been measured providing detailed information on the kinetic energy released in the molecular fragmentation and the dynamics involved (see e.g.…”

Periodic Variations in the Wavelength Distributions following Photon Interferences: Analogy with Electron Interferences

“…Since this hypothesis, the wave nature of the electron has been demonstrated in numerous experiments, by observing diffraction or interference patterns resulting in electron scattering on matter, for example, [2][3][4][5][6][7][8][9][10]. During the last years, electron interference effects have been widely investigated in electron-and ion-induced ionization [7][8][9][10][11][12][13][14][15][16][17][18], as well as in photoionization [19][20][21][22][23][24][25][26][27] of isolated atoms and molecules. In the electron interference experiments [5][6][7][8][9][10][11][12][13][14][15][19][20][21][22][23], each single electron hits the position-sensitive detector like a particle but traverses the interferometer slits (or scatters on atomic centers) like a wave.…”

Impact ionization of molecular oxygen by 3.5-MeV/u bare carbon ions

“…It was predicted earlier [12][13][14] that a diatomic molecule can act as a molecular double slit in ionization by photons, electrons, or heavy ions, which is revealed as oscillations in the electron emission spectrum due to the interference effect. Now there has been rapid progress in this * Electronic address: lokesh@tifr.res.in field through ionization studies of H 2 molecules both experimentally [15][16][17][18][19][20][21][22] and theoretically [23,24]. Even the existence of a double-frequency component in the oscillatory structure has been debated [25][26][27] in the case of ionization of H 2 .…”