Formation of isomers in the reaction sup 238 U( p ,3 n ) sup 236 Np

The energy dependence of the production cross sections in long-lived ({ital l}) and short-lived ({ital s}) isomeric states in {sup 236}Np together with the isomeric ratio of the reaction {sup 238}U({ital p},3{ital n}){sup 236}Np near the reaction threshold was measured. The yield of {sup 236}Np{sup...

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Bibliographic Details
Published in:	Physical review. C, Nuclear physics Vol. 41:2
Main Authors:	Aaltonen, J., Brenner, M., Egorov, S.A., Fridkin, A.M., Funschtein, V.B., Gromova, E.A., Manngard, P., Rubchen'a, V.A., Selitsky, Y.A., Yakovlev, V.A., Zenkevich, V.S.
Format:	Journal Article
Language:	English
Published:	United States 01-02-1990
Subjects:	652020 - Nuclear Properties & Reactions, A=220 & above, Experimental ACTINIDE ISOTOPES ACTINIDE NUCLEI ALPHA PARTICLES BARYON REACTIONS BARYONS BETA DECAY RADIOISOTOPES BETA-MINUS DECAY RADIOISOTOPES CAPTURE CHARGED PARTICLES CHARGED-PARTICLE REACTIONS COULOMB FIELD ELECTRIC FIELDS ELECTRON CAPTURE RADIOISOTOPES ELEMENTARY PARTICLES ENERGY ENERGY DEPENDENCE ENERGY LEVELS ENERGY-LEVEL TRANSITIONS FERMIONS FISSION HADRON REACTIONS HADRONS HALF-LIFE HEAVY NUCLEI HOURS LIVING RADIOISOTOPES ISOMER RATIO ISOMERIC TRANSITIONS ISOTOPES NEPTUNIUM 236 NEPTUNIUM ISOTOPES NEUTRON REACTIONS NEUTRONS NUCLEAR PHYSICS AND RADIATION PHYSICS NUCLEAR REACTIONS NUCLEI NUCLEON REACTIONS NUCLEONS ODD-ODD NUCLEI PROTON REACTIONS RADIOISOTOPES TARGETS THERMAL FISSION THRESHOLD ENERGY URANIUM 238 TARGET YEARS LIVING RADIOISOTOPES
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Summary:	The energy dependence of the production cross sections in long-lived ({ital l}) and short-lived ({ital s}) isomeric states in {sup 236}Np together with the isomeric ratio of the reaction {sup 238}U({ital p},3{ital n}){sup 236}Np near the reaction threshold was measured. The yield of {sup 236}Np{sup {ital s}} was determined from the alpha activity of {sup 236}Pu and the yield of {sup 236}Np{sup {ital l}} from analysis by thermal neutron fission. From the energy dependence of the isomeric ratio it follows that the long-lived state is the ground state in {sup 236}Np. Theoretical calculations of the yields support these results.
ISSN:	0556-2813 1089-490X
DOI:	10.1103/PhysRevC.41.513