Instrumental Neutron Activation Analysis for Lunar Samples Returned by Chang'E-5

New lunar samples retrieved by Chang’E-5 mission were collected from the lunar mid-latitudes (51.916°W, 43.058°N) in the northwest region of Oceanus Procellarum where human beings have never yet been explored, made up for the limited sampling area visited by the United States and the former Soviet Union more than 40 years ago. The Chang’E-5 samples expanded the representation of lunar samples and have extremely important value for scientific research. The concentration values of 39 elements for the Chang’E-5 samples shoveled up from the moon surface were obtained by instrumental neutron activation analysis (INAA), which has the inherent advantages of high sensitivity, multi-elemental and non-destructive analysis, etc. The neutron irradiation experiments of Chang’E-5 samples were carried out in the 49-2 Swimming Pool Reactor (SPR) and Miniature Neutron Source Reactor (MNSR) at China Institute of Atomic Energy (CIAE) for long-time and short-time INAA, respectively. And a hybrid k0-relative method software ADVNA