Autodetachment of the nsnp2 4P1/2 states in negative ions
(1992) In Journal of Physics B: Atomic, Molecular and Optical Physics 25(20). p.4217-4228- Abstract
- The purpose of this work is to compute the autodetachment rates of the nsnp2 P-4(1/2) levels for Be-(2s2p2), Mg-(3s3p2) and Ca-(4s4p2) . Fano's configuration interaction model is implemented to compute the interaction between the discrete and continuum spaces of the wavefunction, which are determined using the multiconfiguration Hartree-Fock technique. Analysing the decay mechanism of the P-4(1/2) components, we find large cancellation effects in the transition matrix for the interaction between the discrete perturbers and the ns2ksS-2(1/2) continuum channels, which makes the calculations very sensitive to computational details. We predict relatively long-lived metastable states with lifetimes in the range 10(-5)-10(-7) s, which, however,... (More)
- The purpose of this work is to compute the autodetachment rates of the nsnp2 P-4(1/2) levels for Be-(2s2p2), Mg-(3s3p2) and Ca-(4s4p2) . Fano's configuration interaction model is implemented to compute the interaction between the discrete and continuum spaces of the wavefunction, which are determined using the multiconfiguration Hartree-Fock technique. Analysing the decay mechanism of the P-4(1/2) components, we find large cancellation effects in the transition matrix for the interaction between the discrete perturbers and the ns2ksS-2(1/2) continuum channels, which makes the calculations very sensitive to computational details. We predict relatively long-lived metastable states with lifetimes in the range 10(-5)-10(-7) s, which, however, only for Be- remain in a qualitative agreement with the experiment. We also investigate the stability of the present approach in the light of the correlation in the discrete perturber and find a strong interplay between the representation of the ns2ks S-2(1/2) Continuum and the ns2n's S-2(1/2) Rydberg series. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3919083
- author
- Miecznik, G ; Brage, Tomas LU and Fischer, CF
- publishing date
- 1992
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Physics B: Atomic, Molecular and Optical Physics
- volume
- 25
- issue
- 20
- pages
- 4217 - 4228
- publisher
- IOP Publishing
- external identifiers
-
- wos:A1992JW74500017
- scopus:4043169774
- ISSN
- 0953-4075
- DOI
- 10.1088/0953-4075/25/20/017
- language
- English
- LU publication?
- no
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Physics, science (011013100)
- id
- e193abb5-569c-49cf-b465-3ecc6266600c (old id 3919083)
- date added to LUP
- 2016-04-01 15:27:01
- date last changed
- 2021-01-03 04:42:26
@article{e193abb5-569c-49cf-b465-3ecc6266600c,
abstract = {{The purpose of this work is to compute the autodetachment rates of the nsnp2 P-4(1/2) levels for Be-(2s2p2), Mg-(3s3p2) and Ca-(4s4p2) . Fano's configuration interaction model is implemented to compute the interaction between the discrete and continuum spaces of the wavefunction, which are determined using the multiconfiguration Hartree-Fock technique. Analysing the decay mechanism of the P-4(1/2) components, we find large cancellation effects in the transition matrix for the interaction between the discrete perturbers and the ns2ksS-2(1/2) continuum channels, which makes the calculations very sensitive to computational details. We predict relatively long-lived metastable states with lifetimes in the range 10(-5)-10(-7) s, which, however, only for Be- remain in a qualitative agreement with the experiment. We also investigate the stability of the present approach in the light of the correlation in the discrete perturber and find a strong interplay between the representation of the ns2ks S-2(1/2) Continuum and the ns2n's S-2(1/2) Rydberg series.}},
author = {{Miecznik, G and Brage, Tomas and Fischer, CF}},
issn = {{0953-4075}},
language = {{eng}},
number = {{20}},
pages = {{4217--4228}},
publisher = {{IOP Publishing}},
series = {{Journal of Physics B: Atomic, Molecular and Optical Physics}},
title = {{Autodetachment of the nsnp2 4P1/2 states in negative ions}},
url = {{http://dx.doi.org/10.1088/0953-4075/25/20/017}},
doi = {{10.1088/0953-4075/25/20/017}},
volume = {{25}},
year = {{1992}},
}