Positron attachment to the He(ns2 1Se) states

James Mitroy; Janina Grineviciute

doi:10.1103/PhysRevA.88.022710

Positron attachment to the He(ns^{2 1}S^e) states

James Mitroy, Janina Grineviciute

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

Abstract

Calculations based on the projection method and using explicitly correlated Gaussians are used to confirm the existence of positron attachment to two doubly excited states of helium. The e⁺He(2s^{2 1}Se) and e ⁺He(3s^{2 1}S^e) states have binding energies of 0.449 and 0.286 eV. These estimates of the resonance energies are nearer to the variational limit than previous calculations. These states will exist as resonances in the e ⁺-He scattering continuum, and complex rotation calculations have been used to estimate their widths.

Original language	English
Article number	22710
Pages (from-to)	1-6
Number of pages	6
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	88
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevA.88.022710
Publication status	Published - Aug 2013

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10.1103/PhysRevA.88.022710

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title = "Positron attachment to the He(ns2 1Se) states",

abstract = "Calculations based on the projection method and using explicitly correlated Gaussians are used to confirm the existence of positron attachment to two doubly excited states of helium. The e+He(2s2 1Se) and e +He(3s2 1Se) states have binding energies of 0.449 and 0.286 eV. These estimates of the resonance energies are nearer to the variational limit than previous calculations. These states will exist as resonances in the e +-He scattering continuum, and complex rotation calculations have been used to estimate their widths. ",

keywords = "Doubly excited state, Gaussians, Projection method, Resonance energies, Binding energy, Positrons",

author = "James Mitroy and Janina Grineviciute",

year = "2013",

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doi = "10.1103/PhysRevA.88.022710",

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AU - Mitroy, James

AU - Grineviciute, Janina

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N2 - Calculations based on the projection method and using explicitly correlated Gaussians are used to confirm the existence of positron attachment to two doubly excited states of helium. The e+He(2s2 1Se) and e +He(3s2 1Se) states have binding energies of 0.449 and 0.286 eV. These estimates of the resonance energies are nearer to the variational limit than previous calculations. These states will exist as resonances in the e +-He scattering continuum, and complex rotation calculations have been used to estimate their widths.

AB - Calculations based on the projection method and using explicitly correlated Gaussians are used to confirm the existence of positron attachment to two doubly excited states of helium. The e+He(2s2 1Se) and e +He(3s2 1Se) states have binding energies of 0.449 and 0.286 eV. These estimates of the resonance energies are nearer to the variational limit than previous calculations. These states will exist as resonances in the e +-He scattering continuum, and complex rotation calculations have been used to estimate their widths.

KW - Doubly excited state

KW - Gaussians

KW - Projection method

KW - Resonance energies

KW - Binding energy

KW - Positrons

U2 - 10.1103/PhysRevA.88.022710

DO - 10.1103/PhysRevA.88.022710

M3 - Article

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JO - Physical Review A

JF - Physical Review A

SN - 1050-2947

IS - 2

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ER -

Positron attachment to the He(ns2 1Se) states

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Positron attachment to the He(ns^{2 1}S^e) states