The FERRUM project: Experimental transition probabilities from highly excited even 5s levels in Cr II
Engström, Lars LU ; Lundberg, Hans LU ; Nilsson, Hampus LU ; Hartman, Henrik LU
and Backstrom, E.
(2014)
In Astronomy & Astrophysics
570.
- Abstract
- We report lifetime measurements of the five levels in the 3d(4)(a(5)D)5s e(6)D term in Cr II at an energy around 83 000 cm(-1), and log(gf) values for 38 transitions from the investigated levels. The lifetimes are obtained using time-resolved, laser-induced fluorescence on ions from a laser-produced plasma. Since the levels have the same parity as the low-lying states directly populated in the plasma, we used a two-photon excitation scheme. This process is greatly facilitated by the presence of the 3d(4)(a(5)D)4p z(6)F levels at roughly half the energy difference. The f-values are obtained by combining the experimental lifetimes with branching fractions derived using relative intensities from a hollow cathode lamp recorded with a Fourier... (More)
- We report lifetime measurements of the five levels in the 3d(4)(a(5)D)5s e(6)D term in Cr II at an energy around 83 000 cm(-1), and log(gf) values for 38 transitions from the investigated levels. The lifetimes are obtained using time-resolved, laser-induced fluorescence on ions from a laser-produced plasma. Since the levels have the same parity as the low-lying states directly populated in the plasma, we used a two-photon excitation scheme. This process is greatly facilitated by the presence of the 3d(4)(a(5)D)4p z(6)F levels at roughly half the energy difference. The f-values are obtained by combining the experimental lifetimes with branching fractions derived using relative intensities from a hollow cathode lamp recorded with a Fourier transform spectrometer. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4875700
- author
- Engström, Lars
LU
; Lundberg, Hans
LU
; Nilsson, Hampus
LU
; Hartman, Henrik
LU
and Backstrom, E.
- organization
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- atomic data, methods: laboratory: atomic, techniques: spectroscopic
- in
- Astronomy & Astrophysics
- volume
- 570
- article number
- A34
- publisher
- EDP Sciences
- external identifiers
-
- wos:000344158500140
- scopus:84907967227
- ISSN
- 0004-6361
- DOI
- 10.1051/0004-6361/201424762
- language
- English
- LU publication?
- yes
- id
- 71e3f23b-53c9-4065-8be0-e687f6cf9f55 (old id 4875700)
- date added to LUP
- 2016-04-01 14:37:14
- date last changed
- 2024-01-10 06:21:43
@article{71e3f23b-53c9-4065-8be0-e687f6cf9f55,
abstract = {{We report lifetime measurements of the five levels in the 3d(4)(a(5)D)5s e(6)D term in Cr II at an energy around 83 000 cm(-1), and log(gf) values for 38 transitions from the investigated levels. The lifetimes are obtained using time-resolved, laser-induced fluorescence on ions from a laser-produced plasma. Since the levels have the same parity as the low-lying states directly populated in the plasma, we used a two-photon excitation scheme. This process is greatly facilitated by the presence of the 3d(4)(a(5)D)4p z(6)F levels at roughly half the energy difference. The f-values are obtained by combining the experimental lifetimes with branching fractions derived using relative intensities from a hollow cathode lamp recorded with a Fourier transform spectrometer.}},
author = {{Engström, Lars and Lundberg, Hans and Nilsson, Hampus and Hartman, Henrik and Backstrom, E.}},
issn = {{0004-6361}},
keywords = {{atomic data; methods: laboratory: atomic; techniques: spectroscopic}},
language = {{eng}},
publisher = {{EDP Sciences}},
series = {{Astronomy & Astrophysics}},
title = {{The FERRUM project: Experimental transition probabilities from highly excited even 5s levels in Cr II}},
url = {{https://lup.lub.lu.se/search/files/4071003/4937903.pdf}},
doi = {{10.1051/0004-6361/201424762}},
volume = {{570}},
year = {{2014}},
}