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

• 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
• DOI: 10.1103/PhysRevC.41.513
• EISSN: 1089-490X
• ISSN: 0556-2813

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.