Of course, this has been proposed as a mechanism for killing the dinosaurs. https://arxiv.org/abs/astro-ph/9505028 https://arxiv.org/abs/astro-ph/9505028 (obv

Of course, this has been proposed as a mechanism for killing the dinosaurs. https://arxiv.org/abs/astro-ph/9505028 https://arxiv.org/abs/astro-ph/9505028 (obviously in conflict with what you posted, and I haven't run through the numbers. Also, our knowledge of radiation effects on organisms is honestly quite limited).