Empirical Example of Nucleus with Transitional Dynamical Symmetry X（5）

By analysing the energy spectrum,E2 transition rates and branching ratios,it is shown explicitly that the nucleus ^150Nd provides an empirical example with X(5) symmetry at the critical point of the transition from U(5) to SU(3) symmetry.     

求一类函数的值域

利用y=sinx的最值求函数y=c/asinx b 的值城,比其它求值域的方法更简便。兹举几例,加以说明。一、当分母恒不等于零时,函数y=C/asinx b的图象是连续的。此时。值域由该函数的最值所决定。