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Table 3

Hyperfine structure decomposition based on atomic information obtained from the associated references for the Ba II (Rutten 1978; Davidson et al. 1992), La II (Lawler et al. 2001a) and Eu II (Lawler et al. 2001b) spectral lines used in the spectrum synthesis of the M 15 giant stars.

Wavelength (Å) Strength Wavelength (Å) Strength

La II λ6496.898: χ = 0.321 eV, log gf = −1.410 Ba II λ6496.898: χ = 0.604 eV, log gf = −0.407

139La: 134Ba:
6390.455............. –2.012 6496.898............. –0.406
6390.468............. –2.183 135Ba:
6390.468............. –2.752 6496.887............. –1.911
6390.479............. –2.570 6496.890............. –1.212
6390.479............. –3.752 6496.895............. –0.765
6390.480............. –2.390 6496.903............. –1.610
6390.489............. –2.536 6496.905............. –1.212
6390.489............. –3.334 6496.908............. –1.212
6390.490............. –2.661 136Ba:
6390.496............. –3.100 6496.898............. –0.406
6390.497............. –2.595 137Ba:
6390.498............. –3.079 6496.886............. –1.911
6390.502............. –2.954 6496.889............. –1.212
6390.503............. –2.778 6496.894............. –0.765
6390.506............. –2.857 6496.904............. –1.610
6496.906............. –1.212
6496.909............. –1.212
138Ba:
6496.898............. –0.406

Eu II λ6437.640: χ = 1.320 eV, log gf = −0.320 Eu II λ6645.127: χ = 1.380 eV, log gf = + 0.120

151Eu: 151Eu:
6437.611............. –0.960 6645.071............. –0.517
6437.619............. –2.191 6645.078............. –1.823
6437.629............. –2.191 6645.085............. –3.467
6437.636............. –1.070 6645.097............. –0.593
6437.643............. –1.998 6645.104............. –1.628
6437.650............. –1.998 6645.112............. –3.149
6437.656............. –1.181 6645.118............. –0.672
6437.662............. –1.956 6645.126............. –1.583
6437.666............. –1.956 6645.133............. –3.077
6437.672............. –1.287 6645.137............. –0.754
6437.676............. –2.010 6645.144............. –1.635
6437.679............. –2.010 6645.150............. –3.245
6437.684............. –1.377 6645.152............. –0.839
6437.687............. –2.207 6645.158............. –1.830
6437.689............. –2.207 6645.163............. –0.921
6437.692............. –1.428 153Eu:
153Eu: 6645.072............. –1.823
6437.610............. –0.960 6645.074............. –0.517
6437.613............. –2.191 6645.074............. –3.467
6437.624............. –2.191 6645.087............. –0.593
6437.627............. –1.070 6645.089............. –1.628
6437.630............. –1.998 6645.094............. –3.149
6437.634............. –1.998 6645.096............. –0.672
6437.637............. –1.181 6645.101............. –1.583
6437.639............. –1.956 6645.104............. –0.754
6437.640............. –1.956 6645.107............. –3.077
6437.641............. –2.010 6645.109............. –0.839
6437.642............. –1.287 6645.110............. –1.635
6437.642............. –2.207 6645.113............. –0.921
6437.643............. –1.428 6645.116............. –1.830
6437.644............. –1.377 6645.116............. –3.245
6437.644............. –2.010
6437.645............. –2.207

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