Intershell-correlation-induced time delay in atomic photoionization

D. A. Keating; S. T. Manson; V. K. Dolmatov; A. Mandal; P. C. Deshmukh; Faiza Naseem; A. S. Kheifets

doi:10.1103/PhysRevA.98.013420

Intershell-correlation-induced time delay in atomic photoionization

D. A. Keating, S. T. Manson, V. K. Dolmatov, A. Mandal, P. C. Deshmukh, Faiza Naseem, A. S. Kheifets

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

16 Citations (Scopus)

Abstract

We predict an observable Wigner time delay in outer atomic shell photoionization near inner shell thresholds. The near-threshold increase of time delay is caused by intershell correlation and serves as a sensitive probe of this effect. The time delay increase is present even when the inner and outer shell thresholds are hundreds of electron volts apart. We illustrate this observation by several prototypical examples in noble gas atoms from Ne to Kr. In our study, we employ the random phase approximation with exchange and its relativistic generalization. We also support our findings by a simplified, yet quite insightful, treatment within the lowest-order perturbation theory.

Original language	English
Article number	013420
Journal	Physical Review A
Volume	98
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevA.98.013420
Publication status	Published - 24 Jul 2018

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title = "Intershell-correlation-induced time delay in atomic photoionization",

abstract = "We predict an observable Wigner time delay in outer atomic shell photoionization near inner shell thresholds. The near-threshold increase of time delay is caused by intershell correlation and serves as a sensitive probe of this effect. The time delay increase is present even when the inner and outer shell thresholds are hundreds of electron volts apart. We illustrate this observation by several prototypical examples in noble gas atoms from Ne to Kr. In our study, we employ the random phase approximation with exchange and its relativistic generalization. We also support our findings by a simplified, yet quite insightful, treatment within the lowest-order perturbation theory.",

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AU - Keating, D. A.

AU - Manson, S. T.

AU - Dolmatov, V. K.

AU - Mandal, A.

AU - Deshmukh, P. C.

AU - Naseem, Faiza

AU - Kheifets, A. S.

PY - 2018/7/24

Y1 - 2018/7/24

N2 - We predict an observable Wigner time delay in outer atomic shell photoionization near inner shell thresholds. The near-threshold increase of time delay is caused by intershell correlation and serves as a sensitive probe of this effect. The time delay increase is present even when the inner and outer shell thresholds are hundreds of electron volts apart. We illustrate this observation by several prototypical examples in noble gas atoms from Ne to Kr. In our study, we employ the random phase approximation with exchange and its relativistic generalization. We also support our findings by a simplified, yet quite insightful, treatment within the lowest-order perturbation theory.

AB - We predict an observable Wigner time delay in outer atomic shell photoionization near inner shell thresholds. The near-threshold increase of time delay is caused by intershell correlation and serves as a sensitive probe of this effect. The time delay increase is present even when the inner and outer shell thresholds are hundreds of electron volts apart. We illustrate this observation by several prototypical examples in noble gas atoms from Ne to Kr. In our study, we employ the random phase approximation with exchange and its relativistic generalization. We also support our findings by a simplified, yet quite insightful, treatment within the lowest-order perturbation theory.

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JO - Physical Review A

JF - Physical Review A

IS - 1

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Intershell-correlation-induced time delay in atomic photoionization

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