The (, ) Reaction and the Nucleon Nucleon Force
198748 pages
Published in:
- Rept.Prog.Phys. 50 (1987) 607-654
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Abstract: (IOP)
The (p,n) charge exchange reaction is a powerful tool of nuclear structure physics, with spectroscopic characteristics that are closely related to the free interaction between nucleons. At proton energies in the range of 150-500 MeV, the interaction probes the spin dynamics in the charge exchange process and is particularly sensitive to nuclear pionic fields. At low energies, say less than 50 MeV bombarding energy, the reaction also probes the isovector density. An outstanding success of the reaction as a structural probe is the elucidation of the Gamow-Teller strength function in the nuclear excitation spectrum. However, the total strength found falls short of sum rule predictions by about 40%. Explanations of this quenching have been advanced along two lines, based on subnuclear degrees of freedom or on configuration mixing into high continuum states. Detailed theoretical arguments support the importance of configuration mixing. The subnuclear degrees of freedom may be comparable, but a decisive test is lacking.- REVIEW
- P N: INTERACTION
- INTERACTION: P N
- P N: CHARGE EXCHANGE
- CHARGE EXCHANGE: P N
- SPIN: ISOSPIN
- ISOSPIN: SPIN
- APPROXIMATION: DISTORTED WAVE IMPULSE
- APPROXIMATION: EIKONAL
- NUCLEON NUCLEUS: NUCLEAR REACTION
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