Formation of the isomeric pairs {sup 139}Nd{sup m,g} and {sup 141}Nd{sup m,g} in proton and {sup 3}He-particle-induced nuclear reactions

Journal Article · Sat Dec 15 04:00:00 EST 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.76.064601· OSTI ID:21067979

Hilgers, K; Qaim, S M ^[1]; Sudar, S ^[1]

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1. Institut fuer Nuklearchemie, Forschungszentrum Juelich, D-52425 Juelich (Germany)

Cross sections were measured by the activation technique for the nuclear reactions {sup 141}Pr(p,n){sup 141}Nd{sup m},{sup 141}Pr(p,3n){sup 139}Nd{sup m},{sup nat}Ce({sup 3}He,xn){sup 141}Nd{sup m}, and {sup nat}Ce({sup 3}He,xn){sup 139}Nd{sup m} up to proton energies of 44 MeV and {sup 3}He-particle energies of 35 MeV. Using the present data and some of our earlier experimental results the isomeric cross-section ratios for the nuclide pairs {sup 139}Nd{sup m,g} and {sup 141}Nd{sup m,g} were calculated. The experimental data were compared with the results of nuclear model calculations using the code STAPRE, which combines the statistical and precompound formalisms. In general the experimentally determined excitation functions as well as the isomeric cross-section ratios could be described by the theory within the limits of experimental uncertainties, but using relatively low values of {eta} [i.e., the ratio of the effective moment of inertia to the rigid-body moment of inertia ({theta}{sub eff}/{theta}{sub rig})]. The mass dependence of {eta} could be confirmed.

• OSTI ID: 21067979
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 76; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CERIUM ISOTOPES
COMPARATIVE EVALUATIONS
EXCITATION FUNCTIONS
HELIUM 3
HELIUM 3 REACTIONS
ISOMERIC NUCLEI
MEV RANGE
NEODYMIUM 139
NEODYMIUM 141
NUCLEAR MODELS
PRASEODYMIUM 141
PRASEODYMIUM 141 TARGET
PROTON REACTIONS
PROTONS
S CODES