Abstract
New atomic cross-sectional data are reported in graphical and tabular form from the ionization threshold at 1378 Å down to 525 Å. The value of the photoionization cross-section at the threshold is 0.32 ± 0.6 Mb falling to 0.1 Mb in the region of 1200 Å and thereafter is dominated by autoionizing transitions. Configuration interaction between the levels of the (4
d
)
9
(5
s
2
5
p
multiplat is observed which causes the
3
D
1
level to interact strongly with the wings of the
3
P
1
level. The oscillator strengths for the (5
s
)
2
1
S
0
-(4
d
)
9
(5
s
)
2
np
1
P
1
,
3
P
1
and
3
D
1
transitions converging on the
2
D
5/2, 3/2
ionic states are reported and an oscillator strength sum approaching unity is observed. Individual line oscillator strengths are compared with Hartree-Fock calculations of Wilson (1968).
Reference8 articles.
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2. Beutler H . 1933 Soc. B (Ser. 2) 1 438.
3. Z.Phys. 87 19.
4. Proc. Roy;Ju;Soc. A,1953
5. Proc. Roy;Tunstead J .;Soc. A,1943
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