Advanced

Determination of hyperfine-induced transition rates from observations of a planetary nebula

Brage, Tomas LU ; Judge, PG and Proffitt, CR (2002) In Physical Review Letters 89(28).
Abstract
Observations of the planetary nebula NGC3918 made with the STIS instrument on the Hubble Space Telescope reveal the first unambiguous detection of a hyperfine-induced transition 2s2p P-3(0)o-->2s(2) S-1(0) in the berylliumlike emission line spectrum of N IV at 1487.89 Angstrom. A nebular model allows us to confirm a transition rate of 4x10(-4) sec(-1)+/-33% for this line. The measurement represents the first independent confirmation of the transition rate of hyperfine-induced lines in low ionization stages, and it provides support for the techniques used to compute these transitions for the determination of very low densities and isotope ratios.
Please use this url to cite or link to this publication:
author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
89
issue
28
publisher
American Physical Society
external identifiers
  • wos:000180317900004
  • scopus:0037207403
  • pmid:12513129
ISSN
1079-7114
DOI
10.1103/PhysRevLett.89.281101
language
English
LU publication?
yes
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Mathematical Physics (Faculty of Science) (011040001), Physics, science (011013100)
id
5ac67b43-5a37-4f6a-b0d3-e12917a2a913 (old id 319713)
date added to LUP
2016-04-01 11:48:11
date last changed
2020-11-22 04:05:56
@article{5ac67b43-5a37-4f6a-b0d3-e12917a2a913,
  abstract     = {Observations of the planetary nebula NGC3918 made with the STIS instrument on the Hubble Space Telescope reveal the first unambiguous detection of a hyperfine-induced transition 2s2p P-3(0)o-->2s(2) S-1(0) in the berylliumlike emission line spectrum of N IV at 1487.89 Angstrom. A nebular model allows us to confirm a transition rate of 4x10(-4) sec(-1)+/-33% for this line. The measurement represents the first independent confirmation of the transition rate of hyperfine-induced lines in low ionization stages, and it provides support for the techniques used to compute these transitions for the determination of very low densities and isotope ratios.},
  author       = {Brage, Tomas and Judge, PG and Proffitt, CR},
  issn         = {1079-7114},
  language     = {eng},
  number       = {28},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Determination of hyperfine-induced transition rates from observations of a planetary nebula},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.89.281101},
  doi          = {10.1103/PhysRevLett.89.281101},
  volume       = {89},
  year         = {2002},
}