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Table 3

Predicted surface composition from a scaled-solar 1.5 M, Z = 0.001 star model at the tip of the AGB.

Pocket A(C) A(N) A(O) A(F) [F/O] [Y/Fe] [Zr/Fe] [Ba/Fe] [Nd/Fe] [Pb/Fe]

Initial 7.29 6.69 7.55 3.24 0.00 0.00 0.00 0.00 0.00 0.00

0.002 8.91 7.17 7.79 4.81 1.32 1.11 1.21 1.70 1.71 2.61
0.0004 8.94 7.17 7.74 4.59 1.16 0.51 0.60 1.05 1.07 1.96

Notes. The [Fe/H] of the model star is  − 1.18, and initial abundances are given in the first row.The [F/O] and [X/Fe] abundances ratios were normalized to the solar abundances from Asplund et al. (2009).

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