DATA FOR TRANSITIONS IN NEUTRAL CARBON Rabia Qindeel

DATA FOR TRANSITIONS IN NEUTRAL CARBON Rabia Qindeel, Norah Alonizan and Nabil Ben Nessib Department of Physics and Astronomy, College of Science, King Saud University. PO. Box 2455, Riyadh 11451, Saudi Arabia. E-mails: rqindeel@ksu. edu. sa, nalonizan@ksu. edu. sa, nbennessib@ksu. edu. sa.

Configuration Term J E(NIST) E(SS) E(AS) E(CW) E(FF) 2 s 2 2 p 2 3 P 0 0 0 0 2 s 2 2 p 2 3 P 1 16 19 19 14 17 2 s 2 2 p 2 3 P 2 43 57 56 44 44 2 s 2 2 p 2 1 D 2 10193 12580 12524 10715 10315 2 s 2 2 p 2 1 S 0 21648 31392 31253 26743 21844

Configuration Term 2 s 2 s 2 s 2 p 3 2 p 3 2 p 3 5 S° 3 D° 3 P° 3 S° 1 P° J NIST 2 3 1 2 0 1 1 33735 64087 64090 64091 75254 75255 75256 105799 119878 E(SS) E(AS) 21347 20933 64590 58400 64590 58398 64590 58399 76982 73013 76983 73015 76981 73012 120734 120668 127533 120002 E(CW) E(FF) 28785 65539 65538 75847 75846 75848 113516 118826 33744 64297 64300 64301 75480 75481 75482 -

λ (Å) gi gk fi k(NIST) fi k(SS) fi k(AS) 2965 3 5 1. 90 E-08 1. 18 E-08 9. 05 E-09 3. 93 E-08 1. 87 E-08 2967 5 5 2. 80 E-08 2. 12 E-08 4. 24 E-09 7. 91 E-09 2. 72 E-08 1560 1 3 7. 16 E-02 2. 27 E-01 7. 10 E-02 2. 52 E-01 7. 68 E-02 1561 3 5 5. 37 E-02 1. 70 E-01 5. 33 E-02 1. 89 E-01 5. 76 E-02 1561 3 3 1. 79 E-02 5. 70 E-02 1. 75 E-02 6. 26 E-02 1. 92 E-02 1561 5 5 1. 07 E-02 3. 44 E-02 1. 03 E-02 3. 74 E-02 1. 15 E-02 1561 5 7 6. 01 E-02 1. 91 E-01 5. 92 E-02 2. 11 E-01 6. 44 E-02 1561 5 3 7. 12 E-04 2. 30 E-03 0. 0006768 2. 48 E-03 7. 66 E-04 1330 5 5 4. 36 E-02 5. 42 E-02 3. 71 E-02 9. 80 E-02 5. 57 E-02 1330 5 3 1. 46 E-02 1. 80 E-02 1. 24 E-02 3. 26 E-02 1. 85 E-02 1329 3 3 1. 47 E-02 1. 83 E-02 1. 25 E-02 3. 30 E-02 1. 87 E-02 1329 3 1 1. 96 E-02 2. 42 E-02 1. 66 E-02 4. 36 E-02 2. 48 E-02 1329 3 5 2. 38 E-02 2. 95 E-02 2. 04 E-02 5. 36 E-02 3. 06 E-02 1329 1 3 5. 80 E-02 7. 18 E-02 4. 95 E-02 1. 30 E-01 7. 42 E-02 2 P-5 S° fi k(CW) fi k(FF) 3 P-3 D° 3 P-3 P°

CONCLUSIONS On the whole, the comparison between the energy levels given by the three codes and NIST indicates that the agreement is between 3 and 5 % except for the 2 s 2 2 p 2 configuration where the SS and AS give 28 % greater values than NIST and CW gives only 10 % greater values than NIST. The discrepancy of AS values comparing to NIST ones attends a factor up to three in the case of the transition 2 s 2 2 p 4 p. FF energy levels values are nearly the same values than NIST ones with less then 1% difference. By comparing oscillator strengths, we obtain better agreement than FF with the AS code for the multiplets 2 s 2 2 p 2 3 P- 2 s 2 p 3 3 D° and for 2 s 2 2 p 2 3 P- 2 s 2 p 3 3 P°. We see that it is better to calculate atomic data with more than one code and to compare with different sources.