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

Journal Article · Wed Jan 31 23:00:00 EST 1990 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.41.513· OSTI ID:6981381

Aaltonen, J ^[1]; Brenner, M ^[2]; Egorov, S A; Fridkin, A M; Funschtein, V B; Gromova, E A ^[3]; Manngard, P ^[2]; Rubchen'a, V A; Selitsky, Y A; Yakovlev, V A ^[3]; Zenkevich, V S ^[4]

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1. Department of Radiochemistry, University of Helsinki, 00170 Helsinki, (Finland)
2. Department of Physics, Abo Akademi 20500 Turku, (Finland)
3. V. G. Klopin Radium Institute, Leningrad, (USSR)
4. I. V. Kurchatov Atomic Energy Institute, Moscow, (USSR)

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.

• OSTI ID: 6981381
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 41:2; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

652020* -- Nuclear Properties & Reactions
A=220 & above
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
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 REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
ODD-ODD NUCLEI
PROTON REACTIONS
RADIOISOTOPES
TARGETS
THERMAL FISSION
THRESHOLD ENERGY
URANIUM 238 TARGET
YEARS LIVING RADIOISOTOPES