Energy levels and radiative rates for Ne-like ions from Cu to Ga
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1 Pramana J. Phys. (2017) 89:79 DOI /s x Indian Academy of Sciences Energy levels and radiative rates for Ne-like ions from Cu to Ga NARENDRA SINGH and SUNNY AGGARWAL Department of Physics, Shyamlal College (University of Delhi), G.T. Road, Shahdara, Delhi , India Corresponding author. MS received 29 June 2016; revised 26 May 2017; accepted 1 June 2017; published online 2 November 2017 Abstract. Energy levels, lifetimes and wave function compositions are computed for 127 fine structural levels in Ne-like ions (Z = 29 31). Configuration interaction has been included among 51 configurations (generating 1016 levels) and multiconfigurational Dirac Fock method is used to generate the wave functions. Similar calculations have also been performed using the fully relativistic flexible atomic code (FAC). Transition wavelength, oscillator strength, transition probabilities and line strength are reported for electric dipole (E1), electric quadrupole (E2), magnetic dipole (M1) and magnetic quadrupole (M2) transitions from the ground level. We compared our calculated results with the available data in the literature. The calculated results are found to be in close agreement with the previous results. Further, we predict some new atomic data which may be important for plasma diagnostics. Keywords. PACS No. Energy levels; oscillator strength; transition probability; GRASP Cs 1. Introduction The spectral lines for neon-like ions are useful in finding the abundance of their ionization states in laboratory and astrophysical [1,2] plasmas. Also, Ne-like ions are highly useful for the modelling of astrophysical, fusion and laser-generated plasmas. Further, because of their closed shell structure, we can estimate the importance of the contributions from relativistic, electron correlations and quantum electrodynamics (QED) effects for studying the energy level and radiative rates. Transitions between levels of 2p 5 3s, 3p and 3d configurations produce prominent lines in the spectra of high-temperature light source in Ne-like ions [3,4]. Further, transitions between these levels were identified in solar flare, Z- pinch plasma etc. To obtain laser action, the 3s and 3p states have been utilized. Also, laser action is obtained in lighter elements [5] for Ne-like ions. Ne-isoelectronic sequence ions have been studied both experimentally and theoretically. On the experimental side, a series of experiments has been performed to measure lifetimes of Ne-like ions using beam foil method [6 11]. As Ne-like ions of middle and high atomic numbers are present in tokamak, laser-produced plasma, electron beam ion trap (EBIT), solar atmosphere etc., the spectra of Ne-like ions have been observed [12 15]. Much work has been done on the theoretical side. Many authors have calculated the transition energies, oscillator strength, lifetimes and transition probabilities using Z-expansion method, configuration-interaction method, multiconfiguration Hartree Fock (MCHF) method, multiconfiguration Dirac Fock () method and relativistic many-body perturbation theory (MBPT) for many Nelike ions with Z = [16 22]. Benchmark calculations for iron group ions have been performed by Ishikawa et al using a relativistic multireference Moller- Plesset method [23,24]. Recently, Jonsson et al [25] calculated energies, transition rates, oscillator strengths and lifetimes using relativistic configuration interaction method for Ne-like ions between Mg and Kr (Z = 29 31). The aim of the present work is to extend the term analysis to more highly ionized ions and to upgrade the database for Ne-like ions with Z = We have calculated results using the method employed in the GRASP code of Grant et al [26], revised by Norrington [27]. To the best of our knowledge, there do not appear to be any large-scale experimental measurement or theoretical calculations for the ions reported in the present work. Therefore, in this paper we have reported 127 fine structural level energies by taking into account Breit and QED effects along with the radiative rate data from the ground state. These calculations find
2 79 Page 2 of 24 Pramana J. Phys. (2017) 89:79 Table 1. Dirac Coulomb (DC), Breit and quantum electrodynamics (QED) contributions to the energy (Ryd.) as a function of the orbital set Ne-like Cu. The sum (Total) is compared with FAC and NIST. All energies are relative to the ground-state energies (Ryd.), lifetimes (s) and mixing coefficients of levels in Ne-like Cu. Level Label J DC Breit QED Total Lifetime Mixing coefficients FAC NIST 1 2s 2 2p 6 1 S e s 2 2p 5 3s 3 P o E s 2 2p 5 3s 1 P o E (5) s 2 2p 5 3s 3 P o E s 2 2p 5 3s 3 P o E (3) s 2 2p 5 3p 3 S e E (13) s 2 2p 5 3p 3 D e E (14) s 2 2p 5 3p 3 D e E s 2 2p 5 3p 1 P e E (12) s 2 2p 5 3p 3 P e E (14) s 2 2p 5 3p 3 P e E s 2 2p 5 3p 3 D e E (9) s 2 2p 5 3p 3 P e E s 2 2p 5 3p 1 D e E (14) (10) s 2 2p 5 3p 1 S e E E s 2 2p 5 3d 3 P o E s 2 2p 5 3d 3 P o E s 2 2p 5 3d 3 P o E (25) s 2 2p 5 3d 3 F o E s 2 2p 5 3d 3 F o E (26) s 2 2p 5 3d 1 D o E (24) (25) s 2 2p 5 3d 3 D o E (26) s 2 2p 5 3d 3 D o E (27) s 2 2p 5 3d 3 F o E (21) s 2 2p 5 3d 3 D o E (18) (21) E s 2 2p 5 3d 1 F o E (20) (22) s 2 2p 5 3d 1 P o E (23) s2p 6 3s 3 S e E s2p 6 3s 1 S e E s2p 6 3p 3 P o E s2p 6 3p 3 P o E s2p 6 3p 3 P o E s2p 6 3p 1 P o E
3 Pramana J. Phys. (2017) 89:79 Page 3 of Table 1. Continued. Level Label J DC Breit QED Total Lifetime Mixing coefficients FAC NIST 34 2s2p 6 3d 3 D e E s2p 6 3d 3 D e E s2p 6 3d 3 D e E s2p 6 3d 1 D e E s 2 2p 5 4s 3 P o E s 2 2p 5 4s 1 P o E (46) s 2 2p 5 4p 3 S e E (56) s 2 2p 5 4p 3 D e E (57) s 2 2p 5 4p 3 D e E s 2 2p 5 4p 1 P e E s 2 2p 5 4p 3 P e E (57) s 2 2p 5 4s 3 P o E s 2 2p 5 4s 3 P o E (39) s 2 2p 5 4p 3 P e E (59) s 2 2p 5 4d 3 P o E s 2 2p 5 4d 3 P o E (71) s 2 2p 5 4d 3 F o E s 2 2p 5 4d 3 F o E (70) s 2 2p 5 4d 3 P o E (69) s 2 2p 5 4p 3 D e E (43) s 2 2p 5 4d 1 D o E (68) (69) s 2 2p 5 4d 3 D o E (70) s 2 2p 5 4p 3 P e E (40) s 2 2p 5 4p 1 D e E (57) (44) s 2 2p 5 4d 1 P o E (71) s 2 2p 5 4p 1 S e E (47) s 2 2p 5 4f 3 D e E s 2 2p 5 4f 1 G e E (73) s 2 2p 5 4f 3 D e E (65) s 2 2p 5 4f 3 G e E s 2 2p 5 4f 3 F e E (75) s 2 2p 5 4f 1 D e E (74) s 2 2p 5 4f 1 F e E (72) s 2 2p 5 4f 3 F e E (61) 99.05
4 79 Page 4 of 24 Pramana J. Phys. (2017) 89:79 Table 1. Continued. Level Label J DC Breit QED Total Lifetime Mixing coefficients FAC NIST 68 2s 2 2p 5 4d 3 F o E (54) s 2 2p 5 4d 3 D o E (69) s 2 2p 5 4d 1 F o E (70) (55) s 2 2p 5 4d 3 D o E (71) s 2 2p 5 4f 3 G e E (66) s 2 2p 5 4f 3 G e E (61) (67) s 2 2p 5 4f 3 F e E (65) (62) s 2 2p 5 4f 3 D e E (64) (66) s 2 2p 5 5s 3 P o E s 2 2p 5 5s 1 P o E (95) s 2 2p 5 5p 3 S e E (105) s 2 2p 5 5p 3 D e E (106) s 2 2p 5 5p 3 D e E s 2 2p 5 5p 1 P e E s 2 2p 5 5p 3 P e E (106) s 2 2p 5 5p 1 S e E (107) s2p 6 4s 3 S e E s 2 2p 5 5d 3 P o E s 2 2p 5 5d 3 P o E (115) s 2 2p 5 5d 3 F o E s 2 2p 5 5d 3 F o E (114) s 2 2p 5 5d 3 P o E (113) s 2 2p 5 5d 1 D o E (112) (113) s 1 2p 6 4s 1 S e E s 2 2p 5 5d 3 D o E (114) s 2 2p 5 5d 1 P o E (115) s 2 2p 5 5s 3 P o E s 2 2p 5 5s 3 P o E (77) s 2 2p 5 5f 3 D e E s 2 2p 5 5f 3 D e E s 2 2p 5 5f 1 G e E (119) s 2 2p 5 5f 3 G e E s 2 2p 5 5f 3 D e E (117)
5 Pramana J. Phys. (2017) 89:79 Page 5 of Table 1. Continued. Level Label J DC Breit QED Total Lifetime Mixing coefficients FAC NIST 101 2s 2 2p 5 5f 1 D e E (118) s 2 2p 5 5f 1 F e E (116) (117) s 2 2p 5 5f 3 F e E (98) s 2 2p 5 5p 3 D e E (81) s 2 2p 5 5p 3 P e E (78) s 2 2p 5 5p 1 D e E (106) (82) s 2 2p 5 5p 3 P e E (83) s2p 6 4p 3 P o E s2p 6 4p 3 P o E (111) s2p 6 4p 3 P o E s2p 6 4p 1 P o E (109) s 2 2p 5 5d 3 F o E (90) s 2 2p 5 5d 3 D o E (113) s 2 2p 5 5d 1 F o E (114) (92) s 2 2p 5 5d 3 D o E (93) s 2 2p 5 5f 3 G e E (102) s 2 2p 5 5f 3 F e E (117) s 2 2p 5 5f 3 F e E (101) (97) s 2 2p 5 5f 3 G e E (98) (103) s2p 6 4d 3 D e E s2p 6 4d 3 D e E s2p 6 4d 3 D e E s2p 6 4d 1 D e E s2p 6 4f 3 F o E s2p 6 4f 3 F o E s2p 6 4f 3 F o E s2p 6 4f 1 F o E
6 79 Page 6 of 24 Pramana J. Phys. (2017) 89:79 Table 2. Dirac Coulomb (DC), Breit and quantum electrodynamics (QED) contributions to the energy (Ryd.) as a function of the orbital set Ne-like Zn. The sum (total) is compared with FAC and NIST. All energies are relative to the ground-state energies (Ryd.), lifetimes (s) and mixing coefficients of levels in Ne-like Zn. Level Label J DC Breit QED Total Lifetime Mixing coefficients FAC NIST 1 2s 2 2p 6 1 Se s 2 2p 5 3s 3 Po E s 2 2p 5 3s 1 Po E (5) s 2 2p 5 3s 3 Po E s 2 2p 5 3s 3 Po E (3) s 2 2p 5 3p 3 Se E (13) s 2 2p 5 3p 3 De E (14) s 2 2p 5 3p 3 De E s 2 2p 5 3p 1 Pe E (12) s 2 2p 5 3p 3 Pe E (14) s 2 2p 5 3p 3 Pe E s 2 2p 5 3p 3 De E (9) s 2 2p 5 3p 3 Pe E (6) s 2 2p 5 3p 1 De E (14) (10) s 2 2p 5 3p 1 Se E E s 2 2p 5 3d 3 Po E s 2 2p 5 3d 3 Po E s 2 2p 5 3d 3 Po E (25) s 2 2p 5 3d 3 Fo E s 2 2p 5 3d 3 Fo E (26) s 2 2p 5 3d 1 Do E (24) (25) s 2 2p 5 3d 3 Do E (26) s 2 2p 5 3d 3 Do E (27) s 2 2p 5 3d 3 Fo E (21) s 2 2p 5 3d 3 Do E (18) (21) s 2 2p 5 3d 1 Fo E (20) (22) s 2 2p 5 3d 1 Po E (23) s2p 6 3s 3 Se E s2p 6 3s 1 Se E s2p 6 3p 3 Po E s2p 6 3p 3 Po E s2p 6 3p 3 Po E s2p 6 3p 1 Po E s2p 6 3d 3 De E s2p 6 3d 3 De E
7 Pramana J. Phys. (2017) 89:79 Page 7 of Table 2. Continued. Level Label J DC Breit QED Total Lifetime Mixing coefficients FAC NIST 36 2s2p 6 3d 3 De E s2p 6 3d 1 De E s 2 2p 5 4s 3 Po E s 2 2p 5 4s 1 Po E (47) s 2 2p 5 4p 3 Se E (57) s 2 2p 5 4p 3 De E (58) s 2 2p 5 4p 3 De E s 2 2p 5 4p 1 Pe E s 2 2p 5 4p 3 Pe E (58) s 2 2p 5 4s 3 Po E s 2 2p 5 4p 3 Pe E (59) s 2 2p 5 4s 3 Po E (39) s 2 2p 5 4d 3 Fo E s 2 2p 5 4d 3 Po E (71) s 2 2p 5 4d 3 Fo E s 2 2p 5 4d 3 Fo E (70) s 2 2p 5 4d 3 Po E (69) s 2 2p 5 4d 1 Do E (68) (69) s 2 2p 5 4d 3 Do E (70) s 2 2p 5 4d 1 De E (43) s 2 2p 5 4d 1 Po E (71) s 2 2p 5 4p 3 Pe E (40) s 2 2p 5 4p 1 De E (58) (44) s 2 2p 5 4p 1 Se E (46) s 2 2p 5 4f 3 De E s 2 2p 5 4f 1 Ge E (73) s 2 2p 5 4f 3 De E (65) s 2 2p 5 4f 3 Ge E s 2 2p 5 4p 3 De E (75) s 2 2p 5 4f 1 De E (74) s 2 2p 5 4p 3 Pe E (72) s 2 2p 5 4f 1 Fe E (61) s 2 2p 5 4d 3 Fo E (53) s 2 2p 5 4d 3 Do E (69) s 2 2p 5 4d 1 Fo E (70) (54)
8 79 Page 8 of 24 Pramana J. Phys. (2017) 89:79 Table 2. Continued. Level Label J DC Breit QED Total Lifetime Mixing coefficients FAC NIST 71 2s 2 2p 5 4d 3 Do E (71) s 2 2p 5 4f 3 Ge E (66) s 2 2p 5 4f 3 Fe E (61) (67) s 2 2p 5 4f 3 Fe E (65) (62) s 2 2p 5 4f 3 De E (64) (66) s 2 2p 5 5s 3 Po E s 2 2p 5 5s 1 Po E (103) s 2 2p 5 5p 3 Se E (109) (84) s 2 2p 5 5p 3 De E (110) s 2 2p 5 5p 1 Pe E (109) (108) s 2 2p 5 5p 3 De E s 2 2p 5 5p 3 Pe E (110) s 2 2p 5 5p 1 Se E (111) s2p 6 4s 3 Se E s2p 6 4s 1 Se E s 2 2p 5 5d 3 Po E s 2 2p 5 5d 3 Po E (115) s 2 2p 5 5d 3 Fo E s 2 2p 5 5d 3 Fo E (114) s 2 2p 5 5d 3 Po E (113) s 2 2p 5 5d 3 Po E (112) s 2 2p 5 5d 3 Do E (114) s 2 2p 5 5d 1 Po E (115) s 2 2p 5 5f 3 De E s 2 2p 5 5f 3 De E s 2 2p 5 5f 1 Ge E (119) s 2 2p 5 5f 3 Ge E s 2 2p 5 5s 3 Pe E s 2 2p 5 5f 3 De E (116) s 2 2p 5 5f 3 Fe E (117)
9 Pramana J. Phys. (2017) 89:79 Page 9 of Table 2. Continued. Level Label J DC Breit QED Total Lifetime Mixing coefficients FAC NIST 101 2s 2 2p 5 5f 1 Fe E (118) (99) s 2 2p 5 5f 3 Fe E (96) s 2 2p 5 5s 3 Pe E (77) s2p 6 4p 3 Pe E (107) s2p 6 4p 3 Po E s2p 6 4p 3 Po E s2p 6 4p 1 Po E (104) s 2 2p 5 5p 3 De E (80) s 2 2p 5 5p 3 Pe E (78) s 2 2p 5 5p 1 De E (110) (82) s 2 2p 5 5p 3 Pe E (83) s 2 2p 5 5d 3 Fo E (91) s 2 2p 5 5d 3 Do E (113) s 2 2p 5 5d 1 Fo E (114) (92) s 2 2p 5 5d 3 Do E (93) s 2 2p 5 5f 3 De E (99) (122) s 2 2p 5 5f 3 Fe E (100) (95) s 2 2p 5 5f 3 Ge E s 2 2p 5 5f 3 Ge E (96) (102) s2p 6 4d 3 De E s2p 6 4d 3 De E s2p 6 4d 3 De E s2p 6 4d 1 De E s2p 6 4f 3 Fo E s2p 6 4f 3 Fo E s2p 6 4f 3 Fo E s2p 6 4f 1 Fo E
10 79 Page 10 of 24 Pramana J. Phys. (2017) 89:79 Table 3. Dirac Coulomb (DC), Breit, and quantum electrodynamics (QED) contributions to the energy (Ryd.) as a function of the orbital set Ne-like Ga. The sum (total) is compared with FAC and NIST. All energies are relative to the ground-state energies (Ryd.), lifetimes (s) and mixing coefficients of levels in Ne-like Ga. S. No. Label J DC Breit QED Total Lifetimes Mixing coefficients FAC NIST 1 2s 2 2p 6 1 S e s 2 2p 5 3s 3 P o E s 2 2p 5 3s 1 P o E (5) s 2 2p 5 3s 3 P o E s 2 2p 5 3s 3 P o E (3) s 2 2p 5 3p 3 S e E (13) s 2 2p 5 3p 3 D e E (14) s 2 2p 5 3p 3 D e E s 2 2p 5 3p 1 P e E (12) s 2 2p 5 3p 3 P e E (14) s 2 2p 5 3p 3 P e E s 2 2p 5 3p 3 D e E (9) s 2 2p 5 3p 3 P e E (6) s 2 2p 5 3p 1 D e E (11) s 2 2p 5 3p 1 S e E E s 2 2p 5 3d 3 P o E s 2 2p 5 3d 3 P o E s 2 2p 5 3d 3 P o E (25) s 2 2p 5 3d 3 F o E s 2 2p 5 3d 3 F o E (26) s 2 2p 5 3d 1 D o E (25) s 2 2p 5 3d 3 D o E (26) s 2 2p 5 3d 3 D o E (27) s 2 2p 5 3d 3 F o E (21) s 2 2p 5 3d 3 D o E (21) s 2 2p 5 3d 1 F o E (22) s 2 2p 5 3d 1 P o E (23) s 1 2p 6 3s 3 S e E s 1 2p 6 3s 1 S e E s 1 2p 6 3p 3 P o E s 1 2p 6 3p 3 P o E (33)
11 Pramana J. Phys. (2017) 89:79 Page 11 of Table 3. Continued. S. No. Label J DC Breit QED Total Lifetimes Mixing coefficients FAC NIST 32 2s 1 2p 6 3p 3 P o E s 1 2p 6 3p 1 P o E (31) s 1 2p 6 3d 3 D e E s 1 2p 6 3d 3 D e E s 1 2p 6 3d 3 D e E s 1 2p 6 3d 1 D e E s 2 2p 5 4s 3 P o E s 2 2p 5 4s 1 P o E (47) s 2 2p 5 4p 3 S e E (57) s 2 2p 5 4p 3 D e E (58) s 2 2p 5 4p 3 D e E s 2 2p 5 4p 1 P e E (40) s 2 2p 5 4p 3 P e E (58) s 2 2p 5 4p 3 P e E (59) s 2 2p 5 4s 3 P o E s 2 2p 5 4s 3 P o E (39) s 2 2p 5 4d 3 P o E s 2 2p 5 4d 3 P o E (71) s 2 2p 5 4d 3 F o E s 2 2p 5 4d 3 F o E (70) s 2 2p 5 4d 3 P o E (69) s 2 2p 5 4d 1 D o E (68) s 2 2p 5 4d 3 D o E (70) s 2 2p 5 4p 3 D e E (43) s 2 2p 5 4d 1 P o E (71) s 2 2p 5 4p 3 P e E (40) s 2 2p 5 4p 1 D e E (44) s 2 2p 5 4p 1 S e E (45) s 2 2p 5 4f 3 D e E s 2 2p 5 4f 1 G e E (74) s 2 2p 5 4f 3 D e E (65) s 2 2p 5 4f 3 G e E s 2 2p 5 4f 3 F e E (75)
12 79 Page 12 of 24 Pramana J. Phys. (2017) 89:79 Table 3. Continued. S. No. Label J DC Breit QED Total Lifetimes Mixing coefficients FAC NIST 65 2s 2 2p 5 4f 1 D e E (73) s 2 2p 5 4f 1 F e E (72) s 2 2p 5 4f 3 F e E (61) s 2 2p 5 4d 3 F o E (53) s 2 2p 5 4d 3 D o E (69) s 2 2p 5 4d 1 F o E (54) s 2 2p 5 4d 3 D o E (71) s 2 2p 5 4f 3 G e E (66) s 2 2p 5 4f 3 F e E (62) s 2 2p 5 4f 3 G e E (67) s 2 2p 5 4f 3 D e E (66) s 2 2p 5 5s 3 P o E s 2 2p 5 5s 1 P o E (107) s 1 2p 6 4s 3 S e E (109) s 2 2p 5 5p 3 D e E (110) s 2 2p 5 5p 3 P e E (84) s 1 2p 6 4s 1 S e E s 2 2p 5 5p 3 D e E s 2 2p 5 5p 3 P e E (110) s 2 2p 5 5p 1 P e E (78) s 2 2p 5 5p 1 S e E (111) s 2 2p 5 5d 3 P o E s 2 2p 5 5d 3 P o E (118) s 2 2p 5 5d 3 F o E s 2 2p 5 5d 3 F o E (117) s 2 2p 5 5d 3 P o E (116) s 2 2p 5 5d 1 D o E (115) s 2 2p 5 5d 3 D o E (117) s 2 2p 5 5d 1 P o E (118) s 1 2p 6 4p 3 P o E s 1 2p 6 4p 3 P o E s 2 2p 5 5f 3 D e E s 2 2p 5 5f 3 D e E s 2 2p 5 5f 3 G e E (121) s 2 2p 5 5f 3 G e E
13 Pramana J. Phys. (2017) 89:79 Page 13 of Table 3. Continued. S. No. Label J DC Breit QED Total Lifetimes Mixing coefficients FAC NIST 100 2s 2 2p 5 5f 3 F e E (123) s 2 2p 5 5f 1 D e E (122) s 2 2p 5 5f 1 F e E (100) s 2 2p 5 5f 3 F e E (121) s 1 2p 6 4p 3 P o E s 1 2p 6 4p 1 P o E (107) s 2 2p 5 5s 3 P o E s 2 2p 5 5s 3 P o E (77) s 2 2p 5 5p 3 D e E (84) s 2 2p 5 5p 3 S e E (109) s 2 2p 5 5p 1 D e E (83) s 2 2p 5 5p 3 P e E (85) s 1 2p 6 4d 3 D e E s 1 2p 6 4d 3 D e E s 1 2p 6 4d 3 D e E s 2 2p 5 5d 3 F o E (91) s 2 2p 5 5d 3 D o E (116) s 2 2p 5 5d 1 F o E (92) s 2 2p 5 5d 3 D o E (93) s 1 2p 6 4d 1 D e E s 2 2p 5 5f 3 G e E (102) s 2 2p 5 5f 1 G e E (103) s 2 2p 5 5f 3 F e E (97) s 2 2p 5 5f 3 D e E (102) s 1 2p 6 4f 3 F o E s 1 2p 6 4f 3 F o E s 1 2p 6 4f 3 F o E s 1 2p 6 4f 1 F o E
14 79 Page 14 of 24 Pramana J. Phys. (2017) 89:79 Table 4. Energies (in Ryd.) are compared with other results. Level Ne-like Ga Ne-like Cu Ne-like Zn Calculated value Ref. [41] Calculated value Ref. [41] Calculated value Ref. [42] 2s 2 2p 6 1 S s 2 2p 5 3s 3 P s 2 2p 5 3s 1 P s 2 2p 5 3s 3 P s 2 2p 5 3s 3 P s 2 2p 5 3p 3 P s 2 2p 5 3p 1 D s 2 2p 5 3p 3 D s 2 2p 5 3p 3 S s 2 2p 5 3p 3 P s 2 2p 5 3p 3 P s 2 2p 5 3p 1 P s 2 2p 5 3p 3 D s 2 2p 5 3p 3 D s 2 2p 5 3p 1 S s 2 2p 5 3d 3 P s 2 2p 5 3d 3 P s 2 2p 5 3d 3 F s 2 2p 5 3d 3 F s 2 2p 5 3d 3 P s 2 2p 5 3d 3 D s 2 2p 5 3d 3 D s 2 2p 5 3d 3 D s 2 2p 5 3d 3 F s 2 2p 5 3d 1 D s 2 2p 5 3d 1 F s 2 2p 5 3d 1 P applications in analysing new data from different plasma and astrophysical sources. 2. Theoretical method For reliable calculations, we have performed calculations by taking two different methods, namely method and flexible atomic code (FAC). Both methods being fully relativistic, give comparable results. We have obtained results using the method employed in the GRASP code of Grant et al [26] and revised by Norrington [27]. In the approach, Hamiltonian for an N-electron atom or ion Dirac Coulomb Hamiltonian is given by Ĥ DC = where N Ĥ i + i=1 N 1 i=1 N j=i+1 ˆri ˆr j 1, (1) Ĥ = c α i p i + βc 2 + V nuc (r) (2) is the single-particle Hamiltonian consisting of kinetic energy and its interaction with the nucleus. In eq. (2), α and β represent 4 4 Dirac matrices whereas c is the speed of light. The N-electron wave function is constructed from central-field Dirac orbitals given by φ nkm = 1 r ( Pnk (r) χ km (θ,φ,σ) iq nk (r) χ km (θ,φ,σ) ), (3) where k is the Dirac angular quantum number, k = ±( j + 1/2) for l = j ± 1/2. So j = k 1/2, m is the projection of the angular momentum j,andp nk, Q nk are radial functions. The spin angular momentum χ km (θ,φ) is a two-component function defined by χ km (θ,φ) = σ =±1/2 lm σ 12 σ l 12 jm Yl m σ (θ, φ) φ σ. (4) An atomic state function (ASF) now formed for the N- electron system with the given total angular momentum
15 Pramana J. Phys. (2017) 89:79 Page 15 of Table 5. Transition data for E1, E2, M1 and M2 transitions from ground levels and 2J for lower level I, upper level k, wavelength λ (Å), line strength S (length form), oscillator strength f (length form), transition rate A ji (length form) calculated using for Ne-like Cu. Results are compared with NIST. S. No. I J λ (Å) λ (Å) NIST A ji (s 1 ) () f ij () S ij (a.u.) () Velocity/length Type 1 2s 2 2p 6 1 S 0 2s 2 2p 5 3s 3 P E E E 02 M2 2 2s 2 2p 6 1 S 0 2s 2 2p 5 3s 1 P E E E E1 3 2s 2 2p 6 1 S 0 2s 2 2p 5 3s 3 P E E E E1 4 2s 2 2p 6 1 S 0 2s 2 2p 5 3s 3 S E E E 04 M1 5 2s 2 2p 6 1 S 0 2s 2 2p 5 3p 3 D E E E E2 6 2s 2 2p 6 1 S 0 2s 2 2p 5 3p 1 P E E E 07 M1 7 2s 2 2p 6 1 S 0 2s 2 2p 5 3p 3 P E E E E2 8 2s 2 2p 6 1 S 0 2s 2 2p 5 3p 3 D E E E 06 M1 9 2s 2 2p 6 1 S 0 2s 2 2p 5 3p 3 P E E E 04 M1 10 2s 2 2p 6 1 S 0 2s 2 2p 5 3p 3 P E E E E2 11 2s 2 2p 6 1 S 0 2s 2 2p 5 3d 3 P E E E E1 12 2s 2 2p 6 1 S 0 2s 2 2p 5 3d 3 P E E E+00 M2 13 2s 2 2p 6 1 S 0 2s 2 2p 5 3d 1 D E E E 01 M2 14 2s 2 2p 6 1 S 0 2s 2 2p 5 3d 3 D E E E E1 15 2s 2 2p 6 1 S 0 2s 2 2p 5 3d 3 3 F E E E 02 M2 16 2s 2 2p 6 1 S 0 2s 2 2p 5 3d 3 D E E E 01 M2 17 2s 2 2p 6 1 S 0 2s 2 2p 5 3d 1 P E E E E1 18 2s 2 2p 6 1 S 0 2s2p 6 3s 3 S E E E 05 M1 19 2s 2 2p 6 1 S 0 2s2p 6 3p 3 P E E E 03 1 E1 20 2s 2 2p 6 1 S 0 2s2p 6 3p 3 P E E E 01 M2 21 2s 2 2p 6 1 S 0 2s2p 6 3p 1 P E E E 02 1 E1 22 2s 2 2p 6 1 S 0 2s2p 6 3d 3 D E E E 06 M1 23 2s 2 2p 6 1 S 0 2s2p 6 3d 3 D E E E E2 24 2s 2 2p 6 1 S 0 2s2p 6 3d 1 D E E E E2 25 2s 2 2p 6 1 S 0 2s 2 2p 5 4s 3 P E E E 02 M2 26 2s 2 2p 6 1 S 0 2s 2 2p 5 4s 1 P E E E E1 27 2s 2 2p 6 1 S 0 2s 2 2p 5 4p 3 S E E E 05 M1 28 2s 2 2p 6 1 S 0 2s 2 2p 5 4p 3 D E E E E2 29 2s 2 2p 6 1 S 0 2s 2 2p 5 4p 1 P E E E 07 M1 30 2s 2 2p 6 1 S 0 2s 2 2p 5 4p 3 P E E E E2 31 2s 2 2p 6 1 S 0 2s 2 2p 5 4s 3 P E E E E1 32 2s 2 2p 6 1 S 0 2s 2 2p 5 4d 3 P E E E E1 33 2s 2 2p 6 1 S 0 2s 2 2p 5 4d 3 F E E E 01 M2 34 2s 2 2p 6 1 S 0 2s 2 2p 5 4p 3 D E E E 06 M1 35 2s 2 2p 6 1 S 0 2s 2 2p 5 4d 1 D E E E 02 M2 36 2s 2 2p 6 1 S 0 2s 2 2p 5 4p 3 P E E E 05 M1 37 2s 2 2p 6 1 S 0 2s 2 2p 5 4p 1 D E E E E2 38 2s 2 2p 6 1 S 0 2s 2 2p 5 4d 1 P E E E E1 39 2s 2 2p 6 1 S 0 2s 2 2p 5 4f 3 D E E E 07 M1 40 2s 2 2p 6 1 S 0 2s 2 2p 5 4f 3 G E E E 04 1 E2 41 2s 2 2p 6 1 S 0 2s 2 2p 5 4f 1 D E E E 03 1 E2 42 2s 2 2p 6 1 S 0 2s 2 2p 5 4d 3 F E E E 03 M2 43 2s 2 2p 6 1 S 0 2s 2 2p 5 4d 3 D E E E 02 M2 44 2s 2 2p 6 1 S 0 2s 2 2p 5 4d 3 D E E E E1 45 2s 2 2p 6 1 S 0 2s 2 2p 5 4f 3 F E E E 04 1 E2 46 2s 2 2p 6 1 S 0 2s 2 2p 5 5s 3 P E E E 03 M2 47 2s 2 2p 6 1 S 0 2s 2 2p 5 5s 1 P E E E E1 48 2s 2 2p 6 1 S 0 2s 2 2p 5 5p 3 S E E E 05 M1
16 79 Page 16 of 24 Pramana J. Phys. (2017) 89:79 Table 5. Continued. S. No. I J λ (Å) λ (Å) NIST A ji (s 1 ) () f ij () S ij (a.u.) () Velocity/length Type 49 2s 2 2p 6 1 S 0 2s 2 2p 5 5p 3 D E E E E2 50 2s 2 2p 6 1 S 0 2s 2 2p 5 5p 1 P E E E 07 M1 51 2s 2 2p 6 1 S 0 2s 2 2p 5 5p 3 P E E E E2 52 2s 2 2p 6 1 S 0 2s2p 6 4s 3 S E E E 07 M1 53 2s 2 2p 6 1 S 0 2s 2 2p 5 5d 3 P E E E E1 54 2s 2 2p 6 1 S 0 2s 2 2p 5 5d 3 F E E E 02 M2 55 2s 2 2p 6 1 S 0 2s 2 2p 5 5d 1 D E E E 02 M2 56 2s 2 2p 6 1 S 0 2s 2 2p 5 5d 1 P E E E E1 57 2s 2 2p 6 1 S 0 2s 2 2p 5 5s 3 P E E E E1 58 2s 2 2p 6 1 S 0 2s 2 2p 5 5f 3 D E E E 07 M1 59 2s 2 2p 6 1 S 0 2s 2 2p 5 5f 3 D E E E E2 60 2s 2 2p 6 1 S 0 2s 2 2p 5 5f 1 D E E E E2 61 2s 2 2p 6 1 S 0 2s 2 2p 5 5p 3 D E E E 07 M1 62 2s 2 2p 6 1 S 0 2s 2 2p 5 5p 3 P E E E E2 63 2s 2 2p 6 1 S 0 2s 2 2p 5 5p 1 D E E E 06 M1 64 2s 2 2p 6 1 S 0 2s2p 6 4p 3 P E E E E1 65 2s 2 2p 6 1 S 0 2s2p 6 4p 3 P E E E 02 M2 66 2s 2 2p 6 1 S 0 2s2p 6 4p 1 P E E E E1 67 2s 2 2p 6 1 S 0 2s 2 2p 5 5d 3 F E E E 03 M2 68 2s 2 2p 6 1 S 0 2s 2 2p 5 5d 3 D E E E 02 M2 69 2s 2 2p 6 1 S 0 2s 2 2p 5 5d 3 D E E E E1 70 2s 2 2p 6 1 S 0 2s 2 2p 5 5f 3 F E E E E2 71 2s 2 2p 6 1 S 0 2s2p 6 4d 3 D E E E 07 M1 72 2s 2 2p 6 1 S 0 2s2p 6 4d 3 D E E E E2 73 2s 2 2p 6 1 S 0 2s2p 6 4d 1 D E E E E2 74 2s 2 2p 6 1 S 0 2s2p 6 4f 3 F E E E 09 M2 J, M and parity P are approximated by a linear combination of n c electronic configuration state functions (CSF) n c ψ α (PJM) = C i (α) γ i (PJM), (5) i=1 where n c is the number of CSFs included in the expansion, C i (α) are the expansion mixing coefficients and α represents all information such as orbital occupation numbers, coupling etc. For expectation of Dirac Hamiltonian we get the energy of the N-electron system as Eα PJM = α (PJM) H DC α (PJM) = ij C i (α) C j (α) γ PJM i H DC γ PJM j (6) = (Cα DC )+ H DC Cα DC. (7) The Hamiltonian matrix H DC has elements H DC rs = γ PJM r H DC γ PJM s. (8) Requiring eq. (8) to be stationary with respect to the mixing coefficients leads to the eigenvalue problem to the mixing coefficients (H DC E DC α I ) C DC α = 0, (9) where I is the n c n c unit matrix. Thus, the predicted atomic energy level Eα PJM can be taken to be the eigenvalues of H DC. There is inclusion of the relativistic two-body Breit interaction and the QED corrections due to vacuum polarization and self-energy. Vacuum polarization and self-energy make up the Lamb shift to the energy and mainly affect the orbitals which penetrate the nucleus. We have used this method to calculate various atomic data parameters in the past [28 38] as it can provide reliable energies and radiative rates among multiplet states of atoms for a wide range of ionizations. Due to the shortage of data for comparison and to check the accuracy of our reported energy levels, we have used the FAC for the other calculation. This is a fully relativistic method based on distorted wave
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