D. L. Ederer, T. B. Lucatorto, and G. Mehlman, "Photoabsorption spectrum of Mg i in the range 226–170 Å (54–70 eV)," J. Opt. Soc. Am. 69, 520-524 (1979)
The photoabsorption spectrum of Mg i has been observed in the spectral region 226–170 Å (54–70 eV) using synchrotron radiation as a background source. The one-electron excitation levels associated with the series: 1s2 2s2 2p63s2 1So → 1s2 2s2 2p5 [2P3/2,1/2]3s2n s, n d were observed as well as 29 two- and three-electron excitation resonances. A critical analysis of the one-electron excitation spectrum was made and classifications for all the multiple electron excitations have been suggested on the basis of their quantum defects to known limits in Mg ii.
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The error in the last digit is shown by the number in parentheses. This error is the estimated most probable error.
These lines were not seen in the other spectra.
These lines are really a blend of
and
. See Ref. 7.
Line 9 of the present work was seen as two lines, 9a and 9b, by Newsom; Mansfield and Connerade labeled 9a with the classification we have given to 9 and 9b as 2p5[3s(3p2 1D)2D]3P1.
This line is really a blend of
, (2P3/2)6d[1/2]1, and (2P1/2)5d[3/2]1.
TABLE II
Transitions from ground level to core-excited levels with two or more excited electrons
(Type): a = absorption; as = asymmetric; w = window feature.
Error in the last digit of the wavelength is shown by the number in parentheses. This error is the estimated most probable error.
A shorthand notation is used for the higher series members; the limit is denoted by a capital letter which is identified in Table III.
This line could be associated with one of the limits of the 2p5 3s3p configuration not listed in Table III such as the 2p5(3s3p3P)2P1/2 or 2p5(3s3p3P)2D3/2 levels.
These three lines could be associated with the configurations 2p5(3p2 3P)3d, 2p5 3s3d2 or 2p5 3s4s2, or a mixture of two or more of them.
TABLE III
Levels of Mg ii which are limits of observed autoionizing series of Mg i
This value for the limit was obtained from the series of window resonances [28], [32–36] and is to be compared with the value of 506 900 (800) cm−1 obtained in Ref. 2.
Tables (3)
TABLE I
Revised list of previously observed transitions associated with core-excited levels
The error in the last digit is shown by the number in parentheses. This error is the estimated most probable error.
These lines were not seen in the other spectra.
These lines are really a blend of
and
. See Ref. 7.
Line 9 of the present work was seen as two lines, 9a and 9b, by Newsom; Mansfield and Connerade labeled 9a with the classification we have given to 9 and 9b as 2p5[3s(3p2 1D)2D]3P1.
This line is really a blend of
, (2P3/2)6d[1/2]1, and (2P1/2)5d[3/2]1.
TABLE II
Transitions from ground level to core-excited levels with two or more excited electrons
(Type): a = absorption; as = asymmetric; w = window feature.
Error in the last digit of the wavelength is shown by the number in parentheses. This error is the estimated most probable error.
A shorthand notation is used for the higher series members; the limit is denoted by a capital letter which is identified in Table III.
This line could be associated with one of the limits of the 2p5 3s3p configuration not listed in Table III such as the 2p5(3s3p3P)2P1/2 or 2p5(3s3p3P)2D3/2 levels.
These three lines could be associated with the configurations 2p5(3p2 3P)3d, 2p5 3s3d2 or 2p5 3s4s2, or a mixture of two or more of them.
TABLE III
Levels of Mg ii which are limits of observed autoionizing series of Mg i
This value for the limit was obtained from the series of window resonances [28], [32–36] and is to be compared with the value of 506 900 (800) cm−1 obtained in Ref. 2.