fix: 1.修复新beta在分析时没有识别到核素之后没有对exist进行赋值的问题

jeecg-module-beta-gamma-analyser/src/main/java/org/jeecg/common/util/SelfBaseUtil.java

@@ -864,6 +864,7 @@ public class SelfBaseUtil extends AbstractLogOrReport {
                     area += counts.get(i);
                 }
                 nuclideParam.put("area", area+"");
+                nuclideParam.put("exist", false);
             }
             param.put(mapKey, nuclideParam);
         }