Sb. Borzakov et al., Resonance parameters and cross section for Np-237 fission induced by neutrons with energies below 1000 eV, PHYS ATOM N, 62(5), 1999, pp. 872-879
New experiments to determine the parameters of neutron resonances (the reso
nance area sigma(0)Gamma(f) and the resonance width Gamma(f)) in the neutro
n-energy range E similar to 3-60 eV and fission cross sections sigma(f)(E)
at energies E similar to 3-1000 eV have been performed at an IBR-30 pulsed
booster by using the time-of-night technique. The measurements have been im
plemented with an ionization chamber containing a record amount (1.5 g) of
high-purity Np-237. The accuracy of data published earlier has been improve
d.