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Table 3

Theoretical surface values of carbon isotopic ratio at the end of the first dredge-up and during the He-burning phase.

Mass V ZAMS VZAMS/Vcrit 12C/13C Δ(12C/13C ) Δ(VZAMS)
(M) (km s-1) (km s-1)

0 25.6
RGB1 50 0.14 23.7 1 ~30
80 0.22 21.6
1.25 110 0.30 18.6

0 10.5
He-B2 50 0.14 9.5 1 ~110
80 0.22 9.2
110 0.30 8.6

0 21.8
RGB1 110 0.27 19.4 1 ~70
180 0.44 17.7
2.0 250 0.61 14.8

0 20.3
He-B2 110 0.27 16.7 1 ~70
180 0.44 15.3
250 0.61 13.4

Notes.

(1)

Post-dredge-up values.

(2)

Central mass fraction of 4He ~ 0.5.

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