Production factors of the main elements from our 150 M⊙ (upper panel) and 250 M⊙ (lower panel) PISN models (red thick lines) compared with those of the similar 70 M⊙ (upper panel) and 115 M⊙ (lower panel) Population III helium star model by Heger & Woosley (2002) (blue thin lines).
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