Ejection of quasi-free-electron pairs from the helium-atom ground state by single-photon absorption

M. S. Schöffler; C. Stuck; M. Waitz; F. Trinter; T. Jahnke; U. Lenz; M. Jones; A. Belkacem; A. L. Landers; M. S. Pindzola; C. L. Cocke; J. Colgan; A. Kheifets; I. Bray; H. Schmidt-Böcking; R. Dörner; Th Weber

doi:10.1103/PhysRevLett.111.013003

Ejection of quasi-free-electron pairs from the helium-atom ground state by single-photon absorption

M. S. Schöffler^*, C. Stuck, M. Waitz, F. Trinter, T. Jahnke, U. Lenz, M. Jones, A. Belkacem, A. L. Landers, M. S. Pindzola, C. L. Cocke, J. Colgan, A. Kheifets, I. Bray, H. Schmidt-Böcking, R. Dörner, Th Weber

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

41 Citations (Scopus)

Abstract

We investigate the single-photon double ionization of helium at photon energies of 440 and 800 eV. We observe doubly charged ions with close to zero momentum corresponding to electrons emitted back to back with equal energy. These slow ions are the unique fingerprint of an elusive quasifree photon double ionization mechanism predicted by Amusia et al. nearly four decades ago. It results from the nondipole part of the electromagnetic interaction. Our experimental data are supported by calculations performed using the convergent close-coupling and time-dependent close-coupling methods.

Original language	English
Article number	013003
Journal	Physical Review Letters
Volume	111
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.111.013003
Publication status	Published - 2 Jul 2013

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Schöffler, M. S., Stuck, C., Waitz, M., Trinter, F., Jahnke, T., Lenz, U., Jones, M., Belkacem, A., Landers, A. L., Pindzola, M. S., Cocke, C. L., Colgan, J., Kheifets, A., Bray, I., Schmidt-Böcking, H., Dörner, R., & Weber, T. (2013). Ejection of quasi-free-electron pairs from the helium-atom ground state by single-photon absorption. Physical Review Letters, 111(1), Article 013003. https://doi.org/10.1103/PhysRevLett.111.013003

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title = "Ejection of quasi-free-electron pairs from the helium-atom ground state by single-photon absorption",

abstract = "We investigate the single-photon double ionization of helium at photon energies of 440 and 800 eV. We observe doubly charged ions with close to zero momentum corresponding to electrons emitted back to back with equal energy. These slow ions are the unique fingerprint of an elusive quasifree photon double ionization mechanism predicted by Amusia et al. nearly four decades ago. It results from the nondipole part of the electromagnetic interaction. Our experimental data are supported by calculations performed using the convergent close-coupling and time-dependent close-coupling methods.",

author = "Sch{\"o}ffler, {M. S.} and C. Stuck and M. Waitz and F. Trinter and T. Jahnke and U. Lenz and M. Jones and A. Belkacem and Landers, {A. L.} and Pindzola, {M. S.} and Cocke, {C. L.} and J. Colgan and A. Kheifets and I. Bray and H. Schmidt-B{\"o}cking and R. D{\"o}rner and Th Weber",

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Schöffler, MS, Stuck, C, Waitz, M, Trinter, F, Jahnke, T, Lenz, U, Jones, M, Belkacem, A, Landers, AL, Pindzola, MS, Cocke, CL, Colgan, J, Kheifets, A, Bray, I, Schmidt-Böcking, H, Dörner, R & Weber, T 2013, 'Ejection of quasi-free-electron pairs from the helium-atom ground state by single-photon absorption', Physical Review Letters, vol. 111, no. 1, 013003. https://doi.org/10.1103/PhysRevLett.111.013003

TY - JOUR

T1 - Ejection of quasi-free-electron pairs from the helium-atom ground state by single-photon absorption

AU - Schöffler, M. S.

AU - Stuck, C.

AU - Waitz, M.

AU - Trinter, F.

AU - Jahnke, T.

AU - Lenz, U.

AU - Jones, M.

AU - Belkacem, A.

AU - Landers, A. L.

AU - Pindzola, M. S.

AU - Cocke, C. L.

AU - Colgan, J.

AU - Kheifets, A.

AU - Bray, I.

AU - Schmidt-Böcking, H.

AU - Dörner, R.

AU - Weber, Th

PY - 2013/7/2

Y1 - 2013/7/2

N2 - We investigate the single-photon double ionization of helium at photon energies of 440 and 800 eV. We observe doubly charged ions with close to zero momentum corresponding to electrons emitted back to back with equal energy. These slow ions are the unique fingerprint of an elusive quasifree photon double ionization mechanism predicted by Amusia et al. nearly four decades ago. It results from the nondipole part of the electromagnetic interaction. Our experimental data are supported by calculations performed using the convergent close-coupling and time-dependent close-coupling methods.

AB - We investigate the single-photon double ionization of helium at photon energies of 440 and 800 eV. We observe doubly charged ions with close to zero momentum corresponding to electrons emitted back to back with equal energy. These slow ions are the unique fingerprint of an elusive quasifree photon double ionization mechanism predicted by Amusia et al. nearly four decades ago. It results from the nondipole part of the electromagnetic interaction. Our experimental data are supported by calculations performed using the convergent close-coupling and time-dependent close-coupling methods.

UR - http://www.scopus.com/inward/record.url?scp=84879898857&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.111.013003

DO - 10.1103/PhysRevLett.111.013003

M3 - Article

SN - 0031-9007

VL - 111

JO - Physical Review Letters

JF - Physical Review Letters

IS - 1

M1 - 013003

ER -

Ejection of quasi-free-electron pairs from the helium-atom ground state by single-photon absorption

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