Gamow-Teller strength in the sup 208 Pb( p , n ) sup 208 Bi reaction at 134. 3 MeV

Journal Article · Wed Nov 01 04:00:00 EST 1989 · Physical Review (Section) C: Nuclear Physics; (USA)

DOI:https://doi.org/10.1103/PhysRevC.40.1985· OSTI ID:5002489

Flanders, B S; Madey, R; Anderson, B D; Baldwin, A R; Watson, J W ^[1]; Foster, C C ^[2]; Klapdor, H V; Grotz, K ^[3]

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1. Department of Physics, Kent State University, Kent, Ohio 44242 (USA)
2. Indiana University Cyclotron Facility, Bloomington, Indiana 47405 (USA)
3. Max-Planck-Institut fuer Kernphysik, Heidelberg, Federal Republic of Germany (DE)

The excitation-energy distribution of transition strength to 1{sup +} states was measured for the {sup 208}Pb({ital p},{ital n}){sup 208}Bi reaction at 134.3 MeV for excitation energies up to 38 MeV. Structures observed in neutron time-of-flight spectra with forward-peaked ({Delta}{ital L}=0) angular distributions were identified as 1{sup +} states, except for the transition to the 0{sup +} isobaric analog state. The 1{sup +} strength in these structures was extracted by normalizing the yield above a fitted polynomial background to the Fermi transition strength localized in the isobaric analog state. The Gamow-Teller strength observed in the 1{sup +} peaks is 56% of the 3({ital N}{minus}{ital Z}) sum rule when the strength of the {beta}{sup +} transitions is assumed to be zero; 45% of 3({ital N}{minus}{ital Z}) is observed in the giant resonance and 10% is observed in structures below the giant resonance. Based on a multipole decomposition analysis, an upper limit on the 1{sup +} strength in the apparent continuum to 38 MeV of excitation energy is estimated to be 37% of 3({ital N}{minus}{ital Z}). These results are compared with predictions from a shell model that includes a pairing force and a long-range Gamow-Teller force in both the parent and daughter nuclei.

• OSTI ID: 5002489
• Journal Information: Physical Review (Section) C: Nuclear Physics; (USA), Journal Name: Physical Review (Section) C: Nuclear Physics; (USA) Vol. 40:5; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651920* -- Nuclear Properties & Reactions
A=190-219
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BARYON REACTIONS
BARYONS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY
BISMUTH 208
BISMUTH ISOTOPES
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
CYCLIC ACCELERATORS
CYCLOTRONS
DATA
DECAY
DISTRIBUTION
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
EQUATIONS
EXPERIMENTAL DATA
FERMIONS
GAMOW-TELLER RULES
GIANT RESONANCE
HADRON REACTIONS
HADRONS
HEAVY NUCLEI
INFORMATION
ISOBARIC ANALOGS
ISOCHRONOUS CYCLOTRONS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
IU CYCLOTRON
LEAD 208 TARGET
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MEV RANGE
MEV RANGE 100-1000
NEUTRONS
NUCLEAR DECAY
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
NUMERICAL DATA
ODD-ODD NUCLEI
PARITY
PARTICLE PROPERTIES
PROTON REACTIONS
RADIOISOTOPES
RESONANCE
SECONDS LIVING RADIOISOTOPES
SHELL MODELS
SPECTROMETERS
SPIN
SUM RULES
TARGETS
TIME-OF-FLIGHT SPECTROMETERS
YEARS LIVING RADIOISOTOPES