Hole states excited by the /sup 24/Mg(p,d)/sup 23/Mg reaction at 95 MeV

Journal Article · Sat Dec 01 04:00:00 EST 1979 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.20.2008· OSTI ID:5629848

Miller, D W; Jones, W P; Devins, D W; Marrs, R E; Kehayias, J

Experimental excitation energies and angular distributions have been obtained for 33 deuteron groups from the /sup 24/Mg(p,d) reaction at 94.8-MeV bombarding energy with 80-keV experimental resolution. Energies obtained for states in /sup 23/Mg are in agreement with the sixth compilation of Endt and van der Leun up to 7.25 MeV and the recent unpublished (p,t) study of Nann et al. up to 9.72 MeV. Energies are determined in the present work for 18 additional groups corresponding to excitations between 9.8 and 13.28 MeV. Angular distributions from 6/sup 0/ to 88/sup 0/ laboratory show characteristic oscillatory signatures for l=0 transitions and broad peaked nonoscillatory behavior for presumed multistep transitions. l=1 and 2 transitions show a very similar exponential falloff with large momentum transfer, but they can be clearly distinguished by their small-angle behavior after division by an empirical exponential factor or by the dominant momentum transfer dependence from a plane-wave analysis. l=1 transitions are observed to deep-hole states at 8.91-, 9.02-, 9.67-, and 10.57-MeV excitation. The angular distributions also lead to very probable assignments of 5/2/sup -/ and 7/2/sup +/ to the 3.97- and 4.68-MeV states of /sup 23/Mg, and are consistent with 9/2/sup +/ and 11/2/sup +/ assignments to the 2.71- and 5.45-MeV states. predictions using optical potentials from published elastic scattering results show rather good agreement with the shapes of the observed angular distributions for l=2 transitions, but spectroscopic factors vary by up to a factor of 3 depending on the deuteron potential employed. l=0 transitions are not fitted in either shape or position of the oscillations, which may be due to the fact that deuteron wave functions derived from elastic scattering are not accurate in the nuclear interior. Reasonable shapes are predicted by preliminary coupled-channel Born-approximation analyses for transitions believed to proceed in two steps.

• Research Organization: Department of Physics, Indiana University, Bloomington, Indiana 47405
• OSTI ID: 5629848
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 20:6; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BORN APPROXIMATION
CHARGED-PARTICLE REACTIONS
COUPLED CHANNEL THEORY
CROSS SECTIONS
DEUTERON SPECTRA
DIRECT REACTIONS
DISTRIBUTION
DWBA
ELASTIC SCATTERING
ENERGY LEVELS
ENERGY RANGE
EVEN-ODD NUCLEI
HADRON REACTIONS
ISOTOPES
LIGHT NUCLEI
MAGNESIUM 23
MAGNESIUM 24 TARGET
MAGNESIUM ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ONE-NUCLEON TRANSFER REACTIONS
OPTICAL MODELS
PARITY
PARTICLE PROPERTIES
PARTICLE-HOLE MODEL
PICKUP REACTIONS
PROTON REACTIONS
RADIOISOTOPES
SCATTERING
SECONDS LIVING RADIOISOTOPES
SPECTRA
SPECTROSCOPIC FACTORS
SPIN
TARGETS
TRANSFER REACTIONS