Inelastic scattering of 40 MeV protons from /sup 24/Mg. II. Microscopic calculations for positive parity states

Journal Article · Fri Sep 01 04:00:00 EDT 1978 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.18.1228· OSTI ID:6730841

Zwieglinski, B; Crawley, G M; Chung, W; Nann, H; Nolen, Jr, J A

Proton inelastic scattering data at 40 MeV bombarding energy are compared to microscopic distorted-wave Born-approximation calculations for positive parity states in /sup 24/Mg utilizing shell-model wave functions spanning the full 2s1d shell basis. Both empirical forces and forces derived from free nucleon-nucleon potentials are used in the calculations. Except for four transitions for which strong coupling effects are evident, the agreement between theory and experiment is quite good. Enhancement factors extracted for the natural parity transitions are consistent with the effective charges obtained from electromagnetic transition rates. Levels corresponding to the giant M1 resonance in /sup 24/Mg have been resolved in the present experiment. The fact that the renormalization factor between theory and experiment is close to unity for the 10.713 MeV 1/sup +/; T = 1 state indicates that little or no renormalization of the two-body force is necessary for this inelastic transition. It is argued that little renormalization is also involved for magnetic-type inelastic transitions of multi polarities higher than M1.

• Research Organization: Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824
• OSTI ID: 6730841
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 18:3; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BORN APPROXIMATION
CHARGED-PARTICLE REACTIONS
DWBA
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
FUNCTIONS
GIANT RESONANCE
HADRON REACTIONS
INELASTIC SCATTERING
MAGNESIUM 24 TARGET
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEON-NUCLEON POTENTIAL
PARITY
PARTICLE PROPERTIES
PROTON REACTIONS
RESONANCE
SCATTERING
SHELL MODELS
TARGETS
WAVE FUNCTIONS