Double Photoexcitation of Helium in a Strong dc Electric Field

J.R. Harries; J.P. Sullivan; J.B. Sternberg; S. Obara; T. Suzuki; Peter Hammond; J. Bozek; N. Berrah; M. Halka; Y. Azuma

doi:10.1103/PhysRevLett.90.133002

Double Photoexcitation of Helium in a Strong dc Electric Field

J.R. Harries, J.P. Sullivan, J.B. Sternberg, S. Obara, T. Suzuki, Peter Hammond, J. Bozek, N. Berrah, M. Halka, Y. Azuma

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Abstract

We report the first experimental measurements of the effect of an applied field on the photoexcitation and autoionization of doubly excited states of helium. Ground-state photoionization spectra have been measured in the region below the He+ (N = 2) threshold with static electric fields of up to 84.4 kV/cm across the interaction region. The results are compared to the theoretical calculations of Chung et al. [J. Phys. B 34, 165 (2001)], which are the only calculations available in this regime. Transitions to several states in the N = 2, n = 6 manifold are assigned, and a wealth of new structure is observed. Our data show that many more series are mixed in by the field than those predicted by theory.

Original language	English
Pages (from-to)	133002-1-133002-4
Journal	Physical Review Letters
Volume	90
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevLett.90.133002
Publication status	Published - 2003

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title = "Double Photoexcitation of Helium in a Strong dc Electric Field",

abstract = "We report the first experimental measurements of the effect of an applied field on the photoexcitation and autoionization of doubly excited states of helium. Ground-state photoionization spectra have been measured in the region below the He+ (N = 2) threshold with static electric fields of up to 84.4 kV/cm across the interaction region. The results are compared to the theoretical calculations of Chung et al. [J. Phys. B 34, 165 (2001)], which are the only calculations available in this regime. Transitions to several states in the N = 2, n = 6 manifold are assigned, and a wealth of new structure is observed. Our data show that many more series are mixed in by the field than those predicted by theory.",

author = "J.R. Harries and J.P. Sullivan and J.B. Sternberg and S. Obara and T. Suzuki and Peter Hammond and J. Bozek and N. Berrah and M. Halka and Y. Azuma",

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T1 - Double Photoexcitation of Helium in a Strong dc Electric Field

AU - Harries, J.R.

AU - Sullivan, J.P.

AU - Sternberg, J.B.

AU - Obara, S.

AU - Suzuki, T.

AU - Hammond, Peter

AU - Bozek, J.

AU - Berrah, N.

AU - Halka, M.

AU - Azuma, Y.

PY - 2003

Y1 - 2003

N2 - We report the first experimental measurements of the effect of an applied field on the photoexcitation and autoionization of doubly excited states of helium. Ground-state photoionization spectra have been measured in the region below the He+ (N = 2) threshold with static electric fields of up to 84.4 kV/cm across the interaction region. The results are compared to the theoretical calculations of Chung et al. [J. Phys. B 34, 165 (2001)], which are the only calculations available in this regime. Transitions to several states in the N = 2, n = 6 manifold are assigned, and a wealth of new structure is observed. Our data show that many more series are mixed in by the field than those predicted by theory.

AB - We report the first experimental measurements of the effect of an applied field on the photoexcitation and autoionization of doubly excited states of helium. Ground-state photoionization spectra have been measured in the region below the He+ (N = 2) threshold with static electric fields of up to 84.4 kV/cm across the interaction region. The results are compared to the theoretical calculations of Chung et al. [J. Phys. B 34, 165 (2001)], which are the only calculations available in this regime. Transitions to several states in the N = 2, n = 6 manifold are assigned, and a wealth of new structure is observed. Our data show that many more series are mixed in by the field than those predicted by theory.

U2 - 10.1103/PhysRevLett.90.133002

DO - 10.1103/PhysRevLett.90.133002

M3 - Article

SN - 0031-9007

VL - 90

SP - 133002-1-133002-4

JO - Physical Review Letters

JF - Physical Review Letters

IS - 13

ER -

Double Photoexcitation of Helium in a Strong dc Electric Field

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