Decay of sup 156 Er compound nucleus

Journal Article · Mon Oct 01 04:00:00 EDT 1990 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.42.1472· OSTI ID:6312729

Fornal, B; Gramegna, F; Prete, G ^[1]; D'Erasmo, G; Fiore, E M; Fiore, L; Pantaleo, A; Paticchio, V; Viesti, G ^[2]; Blasi, P; Lucarelli, F ^[3]; Anghinolfi, M; Corvisiero, P; Taiuti, M; Zucchiatti, A ^[4]; Bortignon, P F ^[5]; Ferrer, C; Nardelli, G; Nebbia, G ^[6]

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1. Laboratori Nazionali di Legnaro, I-35020 Legnaro, Padova (Italy)
2. Istituto Nazionale di Fisica Nucleare and Dipartimento di Fisica dell'Universita di Bari, I-70126 Bari (Italy)
3. Istituto Nazionale di Fisica Nucleare and Dipartimento di Fisica dell'Universita di Firenze, I-50125 Firenze (Italy)
4. Istituto Nazionale di Fisica Nucleare, Bari (Italy) Dipartimento di Fisica dell'Universita di Genova, I-16146 Genova (Italy)
5. Istituto Nazionale di Fisica Nucleare and Istituto di Ingegneria Nucleare di Milano, I-20133 Milano (Italy)
6. Istituto Nazionale di Fisica Nucleare, Padova, (Italy) Dipartimento di Fisica dell'Universita di Padova, I-35131 Padova (Italy)

Charged particles and high energy {gamma} rays from the decay of the {sup 156}Er compound nucleus populated at {ital E}{sub {ital x}}=47 MeV excitation energy by the {sup 12}C+{sup 144}Sm and {sup 64}Ni+{sup 92}Zr reactions have been measured to study possible nonstatistical or entrance channel effects. The experimental spectra and published evaporation residue and neutron data are compared with statistical model calculations. The comparison shows that the statistical model with standard parametrization of level density and yrast lines describes reasonably well the bulk of experimental observables but not the shape of neutron spectra if account is taken of the enhancement factor for {ital E}2 transitions. The discrepancies between experimental data and model calculations are discussed.

• OSTI ID: 6312729
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 42:4; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651820* -- Nuclear Properties & Reactions
A=150-189
Experimental
651920 -- Nuclear Properties & Reactions
A=190-219
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CARBON 12 REACTIONS
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
COMPOUND-NUCLEUS REACTIONS
CROSS SECTIONS
DECAY
DEFORMATION
DISTRIBUTION
E2-TRANSITIONS
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
ERBIUM 156
ERBIUM ISOTOPES
EVAPORATION MODEL
EVEN-EVEN NUCLEI
GAMMA DECAY
GAMMA RADIATION
GIANT RESONANCE
HEAVY ION REACTIONS
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
ISOTOPES
MATHEMATICAL MODELS
MINUTES LIVING RADIOISOTOPES
MULTIPOLE TRANSITIONS
NEUTRON SPECTRA
NICKEL 64 REACTIONS
NUCLEAR DECAY
NUCLEAR DEFORMATION
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
RADIATIONS
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
RESONANCE
SAMARIUM 144 TARGET
SPECTRA
STATISTICAL MODELS
TARGETS
YRAST STATES
ZIRCONIUM 92 TARGET