2008年普通高等学校招生全国统一考试(Ⅱ)卷,理科综合.20题:中子和质子结合成氘核时,质量亏损为Δm,相应的能量ΔE=Δmc~2=2.2 MeV 是氘核的结合能.下列说法正确的是A.用能量小于2.2 MeV 的光子照射静止的氘核时,氘核不能分解为一个质子和一个中子B.用能量等于2.2 MeV 的光子照射静止的氘核时,氘核可能分解为一个质子和一个中 2008 Unified Higher Education Enrollment National Unified Examination (II), Science General. 20 questions: When neutrons and protons combine into a deuteron, the mass loss is Δm, and the corresponding energy ΔE=Δmc~2=2.2 MeV is a deuterium core. Binding energy. The following statement is correct. A. When a stationary helium core is irradiated with photons with energy less than 2.2 MeV, the helium core cannot be decomposed into a proton and a neutron B. When irradiating a stationary helium core with a photon with energy equal to 2.2 MeV , the nucleus may be decomposed into a proton and a middle