  The prompt gamma-ray spectrum from depleted uranium (DU) spherical shells
induced by 14 MeV D-T neutrons is measured. Monte Carlo (MC) simulation gives
the largest prompt gamma flux with the optimal thickness of the DU spherical
shells 3-5 cm and the optimal frequency of neutron pulse 1 MHz. The method of
time of flight and pulse shape coincidence with energy (DC-TOF) is proposed,
and the subtraction of the background gamma-rays discussed in detail. The
electron recoil spectrum and time spectrum of the prompt gamma-rays are
obtained based on a 2"*2" BC501A liquid scintillator detector. The energy
spectrum and time spectrum of prompt gamma-rays are obtained based on an
iterative unfolding method that can remove the influence of {\gamma}-rays
response matrix and pulsed neutron shape. The measured time spectrum and the
calculated results are roughly consistent with each other. Experimental prompt
gamma-ray spectrum in the 0.4-3 MeV energy region agree well with MC simulation
based on the ENDF/BVI.5 library, and the discrepancies for the integral
quantities of gamma-rays of energy 0.4-1 MeV and 1-3 MeV are 9.2% and 1.1%,
respectively.
