Investigation of air ground interface environmental neutron radiation level

Objective: To study the status of ground to air interface environment of neutron radiation level, give the contribution of natural neutron radiation environment. Methods: The latest studies of the literature about the air ground interface environmental neutron data at home and abroad were collected and the comparative study of air interface environmental neutron measurement situation were carried out. Results: The ambient dose equivalent rate from cosmic ray neutron radiation component at sea level is 5.5 nSv·h^-1. The neutron dose rate on aircraft of international routes is 2.5 Sv·h^-1. Conclusion: There are many research focuses on artificial neutron source, such as theoretical research of neutron radiation field, experimental measurement, application and radiation protection of natural neutron radiation field. Further research needs to be carried out for air interface. (authors)