Identification

Title

On the fine structure splitting of the 3p4 3d4 D5/2 AND 3p4 3d4 D7/2 levels of Fe x

Abstract

We study UV spectra obtained with the SO82-B slit spectrograph on board SKYLAB to estimate the fine structure (FS) splitting of the Cl-like 3p(4)3d(4)D(5/2) and 3p(4)3d(4)D(7/2) levels of Fe X. The splitting is of interest because the Zeeman effect mixes these levels, producing a "magnetically induced transition" (MIT) from 3p(4)3d(4)D(7/2) to 3p(5) (2)p(3/2)(o) for modest magnetic field strengths characteristic of the active solar corona. We estimate the splitting using the Ritz combination formula applied to two lines in the UV region of the spectrum close to 1603.2 angstrom, which decay from the level 3p(4)(D-1)3d (2)G(7/2) to these two lower levels. The MIT and accompanying spin-forbidden transition lie near 257 angstrom. By careful inspection of a deep exposure obtained with the S082B instrument, we derive a splitting of. less than or similar to 7 +/- 3 cm(-1). The upper limit arises because of a degeneracy between the effects of non-thermal line broadening and FS splitting for small values of the latter parameter. Although the data were recorded on photographic film, we solved for optimal values of line width and splitting of 8.3 +/- 0.9 and 3.6 +/- 2.7 cm(-1).

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d7gt5pzg

codeSpace

Dataset language

eng

Spatial reference system

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Classification of spatial data and services

Topic category

geoscientificInformation

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Text

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title

Resource Type

reference date

date type

publication

effective date

2016-01-01T00:00:00Z

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date type

publication

effective date

2016-12-16T00:00:00Z

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Conformity

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Limitations on public access

None

Responsible organisations

Responsible party

contact position

OpenSky Support

organisation name

UCAR/NCAR - Library

full postal address

PO Box 3000

Boulder

80307-3000

email address

opensky@ucar.edu

web address

http://opensky.ucar.edu/

name: homepage

responsible party role

pointOfContact

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