Table 1
Calculated excitation energies including low-frequency Breit and QED effects in cm-1 for Fe XV as a function of the increasing size of the CSF expansion.
| Level | MR | n = 6 | n = 7 | n = 8 | ENIST | ΔE |
|
|
||||||
| 3s21S0 | 0 | 0 | 0 | 0 | 0 | 0 |
|
234 093 | 232 715 | 233 776 | 233 828 | 233 842 | –14 |
|
239 939 | 238 571 | 239 617 | 239 668 | 239 660 | 8 |
|
254 097 | 252 628 | 253 774 | 253 829 | 253 820 | 9 |
|
353 073 | 356 546 | 352 320 | 352 169 | 351 911 | 258 |
| 3p23P0 | 554 967 | 556 652 | 554 630 | 554 643 | 554 524 | 119 |
| 3p21D2 | 560 057 | 559 954 | 559 805 | 559 834 | 559 600 | 234 |
| 3p23P1 | 564 964 | 566 472 | 564 636 | 564 663 | 564 602 | 61 |
| 3p23P2 | 582 186 | 583 268 | 581 903 | 581 933 | 581 803 | 130 |
| 3p21S0 | 661 647 | 666 086 | 660 598 | 660 269 | 659 627 | 642 |
| 3s3d 3D1 | 678 934 | 681 357 | 678 918 | 678 954 | 678 772 | 182 |
| 3s3d 3D2 | 679 960 | 682 353 | 679 948 | 679 986 | 679 785 | 201 |
| 3s3d 3D3 | 681 569 | 683 911 | 681 562 | 681 603 | 681 416 | 187 |
| 3s3d 1D2 | 764 433 | 771 831 | 763 242 | 762 729 | 762 093 | 636 |
|
928 976 | 929 572 | 928 467 | 928 565 | 928 241 | 324 |
|
938 881 | 939 360 | 938 373 | 938 469 | 938 126 | 343 |
|
949 099 | 950 319 | 948 656 | 948 768 | 948 513 | 255 |
|
950 379 | 950 744 | 949 888 | 949 990 | 949 658 | 332 |
|
983 762 | 987 307 | 983 044 | 983 077 | 982 868 | 209 |
|
984 401 | 987 628 | 983 723 | 983 765 | 983 514 | 251 |
|
995 717 | 999 181 | 995 041 | 995 088 | 994 852 | 236 |
|
996 918 | 1 000 006 | 996 184 | 996 218 | 995 889 | 329 |
|
997 231 | 1 000 416 | 996 509 | 996 547 | 996 243 | 304 |
|
997 548 | 1 000 823 | 996 849 | 996 892 | 996 623 | 269 |
|
1 065 486 | 1 072 573 | 1 063 598 | 1 063 163 | 1 062 515 | 648 |
|
1 078 724 | 1 086 604 | 1 076 426 | 1 075 795 | 1 074 887 | 908 |
| 3d23F2 | 1 370 858 | 1 374 588 | 1 370 811 | 1 370 858 | 1 370 331 | 527 |
| 3d23F3 | 1 372 524 | 1 376 182 | 1 372 476 | 1 372 527 | 1 372 035 | 492 |
| 3d23F4 | 1 374 560 | 1 378 157 | 1 374 525 | 1 374 580 | 1 374 056 | 524 |
| 3d21D2 | 1 404 365 | 1 409 904 | 1 403 685 | 1 403 474 | 1 402 592 | 882 |
| 3d23P0 | 1 406 561 | 1 411 610 | 1 406 345 | 1 406 328 | ||
| 3d23P1 | 1 407 198 | 1 412 173 | 1 406 940 | 1 406 926 | ||
| 3d21G4 | 1 409 313 | 1 415 257 | 1 408 270 | 1 407 974 | 1 407 058 | 916 |
| 3d23P2 | 1 408 806 | 1 413 825 | 1 408 503 | 1 408 467 | 1 407 773 | 694 |
| 3d21S0 | 1 491 776 | 1 500 820 | 1 489 804 | 1 488 993 | 1 487 054 | 1939 |
Notes. Expansions are obtained from CSFs that can be generated from SD excitations, from an MR, to an active set labeled by the highest n value of the of orbitals in the set. Observed energies are from the NIST Atomic Spectra Database (ver. 5.3; Kramida et al. 2015). ΔE is the difference between the calculated energies for n = 8 and the observed energies.
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