Doomsayers and Chicken Little types can now rest a little easier. Scientists say the chances of our planet being struck by high energy gamma ray burst are close to nil.
With proper designs of tool configuration,neutron burst sequence,as well as acquisition of energy and time spectra of gamma ray,an integrated pulsed-neutron gamma ray logging tool,which involves carbon/oxygen logging,neutron lifetime logging and oxygen activation logging,is constructed. 通过恰当地设计...