本题目来源于试卷: Nuclear Physics and Radioactivity，类别为 IB物理学
[问答题]
The alpha particles from a 1mjke t rpt it+8+90awckcr34given alpha-emittinghnpfa1 dl2 ;;s nuclide are generally monoenergetic; that is, they all have the same kinetic energy.2fapsn lh1;;d But the beta particles from a beta-emitting nuclide have a spectrum of energies. Explain the difference between these two cases.
参考答案:
In alpha decay, assuming the energy of the parent nucleus is known, then the unknowns after the decay are the energies of the daughter nucleus and the alpha. These two values can be determined by energy and momentum conservation. Since there are two unknowns and two conditions, the values are uniquely determined. In beta decay, there are three unknown post-decay energies since there are three particles present after the decay. The conditions of energy and momentum conservation are not sufficient to exactly determine the energy of each particle, and so a range of possible values is possible.
本题详细解析:
暂无
| 
