Relativistic effects in photoionization time delay near the Cooper minimum of noble-gas atoms

Soumyajit Saha; Ankur Mandal; Jobin Jose; Hari R. Varma; P. C. Deshmukh; A. S. Kheifets; V. K. Dolmatov; S. T. Manson

doi:10.1103/PhysRevA.90.053406

Relativistic effects in photoionization time delay near the Cooper minimum of noble-gas atoms

Soumyajit Saha^*, Ankur Mandal, Jobin Jose, Hari R. Varma, P. C. Deshmukh, A. S. Kheifets, V. K. Dolmatov, S. T. Manson

^*Corresponding author for this work

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

36 Citations (Scopus)

Abstract

Time delay of photoemission from valence ns, np3/2, and np1/2 subshells of noble-gas atoms is theoretically scrutinized within the framework of the dipole relativistic random phase approximation. The focus is on the variation of time delay in the vicinity of the Cooper minima in photoionization of the outer subshells of neon, argon, krypton, and xenon, where the corresponding dipole matrix element changes its sign while passing through a node. It is revealed that the presence of the Cooper minimum in one photoionization channel has a strong effect on time delay in other channels. This is shown to be due to interchannel coupling.

Original language	English
Article number	053406
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	90
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevA.90.053406
Publication status	Published - 6 Nov 2014

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title = "Relativistic effects in photoionization time delay near the Cooper minimum of noble-gas atoms",

abstract = "Time delay of photoemission from valence ns, np3/2, and np1/2 subshells of noble-gas atoms is theoretically scrutinized within the framework of the dipole relativistic random phase approximation. The focus is on the variation of time delay in the vicinity of the Cooper minima in photoionization of the outer subshells of neon, argon, krypton, and xenon, where the corresponding dipole matrix element changes its sign while passing through a node. It is revealed that the presence of the Cooper minimum in one photoionization channel has a strong effect on time delay in other channels. This is shown to be due to interchannel coupling.",

author = "Soumyajit Saha and Ankur Mandal and Jobin Jose and Varma, {Hari R.} and Deshmukh, {P. C.} and Kheifets, {A. S.} and Dolmatov, {V. K.} and Manson, {S. T.}",

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AU - Saha, Soumyajit

AU - Mandal, Ankur

AU - Jose, Jobin

AU - Varma, Hari R.

AU - Deshmukh, P. C.

AU - Kheifets, A. S.

AU - Dolmatov, V. K.

AU - Manson, S. T.

PY - 2014/11/6

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N2 - Time delay of photoemission from valence ns, np3/2, and np1/2 subshells of noble-gas atoms is theoretically scrutinized within the framework of the dipole relativistic random phase approximation. The focus is on the variation of time delay in the vicinity of the Cooper minima in photoionization of the outer subshells of neon, argon, krypton, and xenon, where the corresponding dipole matrix element changes its sign while passing through a node. It is revealed that the presence of the Cooper minimum in one photoionization channel has a strong effect on time delay in other channels. This is shown to be due to interchannel coupling.

AB - Time delay of photoemission from valence ns, np3/2, and np1/2 subshells of noble-gas atoms is theoretically scrutinized within the framework of the dipole relativistic random phase approximation. The focus is on the variation of time delay in the vicinity of the Cooper minima in photoionization of the outer subshells of neon, argon, krypton, and xenon, where the corresponding dipole matrix element changes its sign while passing through a node. It is revealed that the presence of the Cooper minimum in one photoionization channel has a strong effect on time delay in other channels. This is shown to be due to interchannel coupling.

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JF - Physical Review A - Atomic, Molecular, and Optical Physics

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Relativistic effects in photoionization time delay near the Cooper minimum of noble-gas atoms

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