Time-gated energy spectra for removal of borehole capture background

A system comprising:

• a pulsed neutron logging tool comprising:
• a neutron tube disposed in a pulsed neutron generator;
• one or more gamma ray scintillator detectors;
• and
• one or more thermal neutron detectors;
• and
• an information handling system in communication with the pulsed neutron logging tool and configured to:
• select a pulsing scheme for taking one or more measurements using a pulsed neutron logging tool;
• select a neutron burst width for the pulsing scheme based at least in part on a neutron tube utilized by the pulsed neutron logging tool to form at least in part a neutron burst train;
• select a decay window in which the one or more measurements are performed by the pulsed neutron logging tool;
• select a starting time for a late gate in which the one or measurements are taken;
• select a time for a late time gate that is initiated after the neutron burst train in which one or more measurements may be performed;
• instruct the neutron tube to emit a neutron burst train;
• and
• instruct the one or more gamma ray scintillator detectors or the one or more thermal neutron detectors to perform one or more measurements during the late time gate.