Prompt and delayed neutrons (DN) from pulsed irradiation of geometrically identical natural uranium and lead targets by 1 and 4 GeV deuterons were measured at NUCLOTRON facility of Joint Institute for Nuclear Research. The massive (~300 kg) cubic shaped targets were surrounded by 10 cm lead blanket. Neutrons were measured by the assembly of 3 He counters embedded in moderator and by threshold activation detectors. The DN decay curves were analysed for both targets and information on fragment yields for lead target and fission properties for uranium one was extracted. The obtained experimental information could be useful for verification of INC and transport codes. The results of this experiment are important for development of advanced ADS systems and other applications.

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3,9 ]undec-3-ene-6,1'-cyclohexane]. -(NIKITINA, E. V.; SAFRONOVA, A. A.; VARLAMOV, A. V.; ZUBKOV, F. I.; ALEKSANDROV, G. G.; TURCHIN, K. F.; Chem. Heterocycl. Compd. (N. Y.) 39 (2003) 1, 130-131; Russ. Peoples' Friendship Univ., Moscow 117198, Russia; Eng.) -Staver 37-135

The reactions of 3-acetyl-3-aza-11-oxatricyclo[6.2.1.0(1,6)]undec-9-ene and its 9,10-epoxy derivative with bromine and Ac(2)O/BF(3).OEt(2) under different conditions were studied. Unusual products of Wagner-Meerwein rearrangement bearing the olefin fragment (5-aza-2-oxatricyclo[6.2.1.0(3,9)]undecen-3-enes) were isolated and characterized by X-ray analysis.

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1,6 ]undec-9-ene) Derivatives. -A new one-step method for the synthesis of title epoxyoctahydroisoquinoline derivatives (VII) and (IX) is presented, involving the intramolecular cycloaddition reaction of homoallylamines (IV) and (VIII), resp., in the presence of N-acylating agents. The cycloaddition reaction proceeds with exo-stereoselectivity. The influence of N-acylating agent on the yield is studied but no clear trend can be found. The reaction does not proceed with homomethallyl analogues probably due to steric hindrance at the homoallylic double bond. -(ZUBKOV*, F. I.; NIKITINA, E. V.; TURCHIN, K. F.; SAFRONOVA, A. A.; BORISOV, R. S.; VARLAMOV, A. V.; Russ.