Method for determining the presence or absence of abnormal radioactive material of the target in the detection zone, apparatus, computer-readable storage medium having recorded thereon a computer program and the computer program

摘要

In manner, from the target, the target gamma-ray spectrum is acquired, from the target gamma-ray spectrum, the target data set is prepared. The association and others re te it is in the energy bottle which displays the range of gamma-ray energy or the gamma-ray energy to which this data set includes multiple strength values, as for each strength value, in the target gamma-ray spectrum. The data library where, the target data set being preprocessed next, was projected to the main component space, is preprocessed is included, it is projected to the main component space. Next, was projected distance with the target data set and was projected in the main component space, one of the data libraries which are preprocessed or the multiple clusters which is preprocessed to be measured, in order to decide whether or not this distance, the abnormal radiation material exists in the target, specified threshold distance it is compared.