“产额”的英语？

对于大多数生物学研究来说,产额通常是太低.Generally for most biological studies the yields are too low.波长变换剂的存在使液体闪耀体的光电产额提高到0.61.The presence of the shifter increases the light yield of the liquid scintillator to 0.61.根据电荷分布假设得到了靶余核的质量产额分布....