本题目来源于试卷: Nuclear Energy; Effects and Uses of Radiation，类别为 IB物理学
[问答题]
Are fission fragments 4eb2rjtnvizbm(y2 l2-s,*i phb28ij ka(ht8 age:hs7nt y,. $\beta^+$ or $\beta^-$ emitters? Explain.
参考答案:
Fission fragments are neutron-rich. They have Z values, though, in a range where stable nuclei should have nearly equal numbers of neutrons and protons. Thus, these fission fragments are unstable with more neutrons than protons. For them to become more stable they will emit $\beta^-$ particles. The emission of a $\beta^-$ particle essentially converts a neutron in the nucleus to a proton (while ejecting an electron), which brings the nuclei closer to the stable numbers of neutrons and protons.
本题详细解析:
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