Protons and helium nuclei account for 99 percent of all cosmic rays, and analyzing the energy spectrum will provide key information for research.

质子和氦核占所有宇宙射线的99%，分析能量谱将为研究提供关键信息。

Scientists with the project say they have measured the energy spectrum of cosmic ray helium nuclei using four and half years of recorded data.

参与该项目的科学家表示，他们利用四年半的记录数据测量了宇宙射线氦核的能量谱。

Their indirect effects can nonetheless be measured when their existence has been confirmed by a small shift call the lamb shift, which they produce in the spectrum energy of light from excited hydrogen atoms.

然而 当它们的存在被称为兰姆位移的小位移证实时 它们的间接影响就可以测量出来 兰姆位移是它们在激发氢原子的光谱能量中产生的。