High-power, photofission-inducing bremsstrahlung source for intense pulsed active detection of fissile material oleh J. C. Zier, D. Mosher, R. J. Allen, R. J. Commisso, G. Cooperstein, D. D. Hinshelwood, S. L. Jackson, D. P. Murphy, P. F. Ottinger, A. S. Richardson, J. W. Schumer, S. B. Swanekamp, B. V. Weber