[en] A brief summary of all work completed under Contract No. EY-76-S-06-2227, Task Agreement 7 is given. Work is described concerning the probability of fission, the transition state nucleus and its properties, fission product energy distributions, fission fragment angular momentum, ternary fission, long range α particle emission, nuclear spectroscopy of fission products, studies involving low energy and relativistic heavy ions, and nuclear environmental chemistry. A bibliography of publications resulting from this contract is appended

[en] The neutron induced fission cross-section of ²⁴¹Pu has been measured at an 8 m flightpath of the CBNM Linac (from 50 eV to below thermal energy) with respect to the ¹⁰B(n,α)⁷Li cross section. Several fission integrals were calculated as well as the 20.44⁰C Westcott factor g/sub f/ = 1.046 +- 0.006. Special attention is given to normalization problems. 2 tables, 2 figures

[en] The (n,γf) reaction effect was investigated in the case of the ²⁴¹Pu fission induced by 2-100eV neutrons. The effect of (n,γf) reaction is important for Jπ=2⁺ resonances; for Jπ=3⁺ resonances the effect is weak and masked by experimental errors

[en] Fluctuations from resonance to resonance of the average number of prompt neutrons and of the average gamma ray energy have been measured for the neutron-induced fission of ²⁴¹Pu in the energy range 4-91eV. The 60MeV linar accelerator of CEN Saclay was used to produce the pulsed beam of incident neutrons, and a large Gd-loaded liquid scintillator to measure simultaneously the average number of prompt neutrons and the average gamma ray energy. Weak anticorrelated fluctuations observed for these two quantities have been attributed to the (n,γf) reaction

No abstract available

[en] The neutron induced compound nuclear cross sections are required for nuclear energy, national security and nuclear astrophysics applications. The renewed interest in nuclear energy has led to design of new reactor systems based on fast neutron induced fission. The transuranic nuclide produced in the nuclear fuel cycles by successive neutron capture, play prominent role in modeling processes that are relevant to generate energy. The fast-neutron induced reactions have also been proposed for the incineration of actinide materials, notably minor actinide isotopes which are produced in Th-U or U-Pu fuel cycles. Unfortunately, for a large number of reactions the relevant data cannot be directly measured in the laboratory, since the relevant nuclei are often too difficult to produce with currently available experimental techniques or too short-lived to serve as target in present day setups

No abstract available

[en] During the past 25 years, a number of investigations on the thermal neutron fission of ²³⁵U have been reported but the same is not true in case of ²³³U, ²³⁹Pu and particularly ²⁴¹Pu. ²⁴¹Pu is an important fissionable nuclide as it has high thermal neutron fission cross section and is formed in appreciable amounts along with other plutonium isotopes as the fuel is irradiated to high burn-up. This paper presents the mass spectrometric studies on the determination of fission yields in the thermal neutron induced fission of ²⁴¹Pu. Fission yields for mass numbers 95, 97, 98 and 100 which are important for determining the light mass wing of the mass distribution curve have been determined mass spectrometrically for the first time. Cumulative yields for 24 mass numbers are reported and the data is compared with literature data. (author)

[en] Parametrization problems of neutron cross-sections in the resonance energy region are discussed; negative level parameters are given for ²³⁵U, ²³⁹Pu and ²⁴¹Pu. (author)

[en] The document contains the English translation of the following two papers published in Yadernye Konstanty 3, 1988: ''Measurement and analysis of neutron transmission and self-indication of the neutron radiative capture cross-section for ²³⁸U in the 5-110 keV energy region'' and ''Re-evaluation of the resonance parameters of ²⁴¹Pu. Refs, figs and tabs