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Evidence concerning. delta. -hole states

Conference · · AIP Conf. Proc.; (United States)
OSTI ID:5349109
Recent (p,n) experiments at intermediate energy at the Indiana University Cyclotron have been used to study the spin-isospin transfer response function of nuclei. In particular forward angle spectra are dominated by neutron peaks characterized with ..delta..L = 0 transfer, which have been identified as Gamow-Teller (GT) 1/sup +/ states. The GT strength function in nuclei throughout the periodic table is presented. The sum of the total observed GT strength is compared to a model independent sum rule to obtain an A dependence of the quenching. General features of GT strength distributions are presented and discussed. A especial effort is made to estimate how much of the GT strength resides at excitation energies between 20 - 40 MeV. The fact that less GT strength is observed than is expected (either calculations or sum rule) may be associated with intrinsic nucleon degrees of freedom, in particular the excitation of ..delta..-hole states. 14 references, 9 figures.
Research Organization:
Ohio Univ., Athens
OSTI ID:
5349109
Report Number(s):
CONF-821050-
Conference Information:
Journal Name: AIP Conf. Proc.; (United States) Journal Volume: 57
Country of Publication:
United States
Language:
English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METALS
ANGULAR MOMENTUM
BARYON REACTIONS
BARYONS
CADMIUM 114 TARGET
CALCIUM 42 TARGET
CHARGED-PARTICLE REACTIONS
DATA
DISTORTED WAVE THEORY
DYSPROSIUM 162 TARGET
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
FLUORINE 19 TARGET
FUNCTIONS
GAMOW-TELLER RULES
GERMANIUM 74 TARGET
HADRON REACTIONS
HADRONS
IMPULSE APPROXIMATION
INFORMATION
INTERACTIONS
ISOSPIN
LEAD 208 TARGET
LITHIUM 7 TARGET
METALS
MEV RANGE
MEV RANGE 100-1000
NEUTRONS
NICKEL 58 TARGET
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEONS
NUMERICAL DATA
PARTICLE PROPERTIES
POTASSIUM
PROTON REACTIONS
RESONANCE PARTICLES
SPIN
STRENGTH FUNCTIONS
TARGETS
VANADIUM 51 TARGET
ZINC 70 TARGET
ZIRCONIUM 90 TARGET