根半径 meaning in English

root radius

In this paper the ground state structure of the four - hypemucluei ^ he > " be * be and a c are studied by applying a5 / fe structure model and few - body theory method and compared with the results of the shell model and the a cluster model from the ground binding energy and r . m . s distances
我们用a ， he结构模型和少体理论方法从基态结合能和集团间的方均根半径出发研究了aa6he 、 a9be 、 a ? be和? c这四个超核的基态结构，并与文献中用壳模型和集团模型的计算结果作了比较。