Table 2 The relative biological effectiveness (RBE) for SPE-like protons compared with standard reference radiations (gamma or electron) in animal models

From: Limitations in predicting the space radiation health risk for exploration astronauts

Animal

WBC

Neutrophil

Mouse

1

1

Ferret

1.16–1.6

1.9–2

Mini-Pig

2.4–4.1

2.2–5

  1. Source: Refs.45,56,71,72
  2. The RBE of proton exposure varies greatly for total white blood cells (WBC) and specifically for neutrophils when comparing animal models. Note that ferret RBE values were determined 48 h after exposure; mini-pig values were determined 4 days post-irradiation