Elastic and inelastic scattering of [sup 16]O and [sup 18]O ions from [sup 64]Zn at energies near the Coulomb barrier

Journal Article · Mon Aug 01 00:00:00 EDT 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.50.927· OSTI ID:7014956

Salem-Vasconcelos, S; Takagui, E M; Bechara, M J; Koide, K; Dietzsch, O ^[1]; Jr, A B.N. ^[2]; Takai, H ^[3]

---

1. Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo (Brazil)
2. Instituto de Fisica, Universidade Federal do Rio de Janeiro, Rio de Janeiro (Brazil)
3. Brookhaven National Laboratory, Upton, New York 11973 (United States)

Coulomb-nuclear interference effects were investigated in the inelastic scattering of [sup 16]O and [sup 18]O by [sup 64]Zn. Measurements of elastic and inelastic angular distributions of [sup 18]O were performed at a laboratory energy of 49 MeV, over the angular range from [theta][sub lab][similar to]30[degree] to 85[degree]. The excitation functions of [sup 16]O and [sup 18]O ions were measured at incident energies between 29 and 46 MeV at [theta][sub lab]=174[degree]. The experimental angular distributions show structures which are more pronounced for projectile excitation than for target excitation. The interference minimum for the excitation of the [sup 18]O first 2[sup +] state was found to be shifted towards forward angles by approximately 5[degree] (c.m.) with respect to the distorted-wave Born approximation calculations and by approximately 3.5[degree] (c.m.) with respect to the coupled-channels calculations. A pronounced Coulomb-nuclear interference minimum was seen in the excitation of [sup 64]Zn(2[sup +]) state by inelastic scattering of [sup 16]O projectiles, whereas no pronounced minimum was observed in target excitation by [sup 18]O projectiles. The elastic scattering data were analyzed with the optical model. The inelastic differential cross sections for the excitation of the first 2[sup +] states in the target and in the [sup 18]O projectile were analyzed using the distorted-wave Born approximation and also the coupled-channels approach with collective form factors.

• OSTI ID: 7014956
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 50:2; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663450* -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
663550 -- Nuclear Mass Ranges-- A=59-89-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BORN APPROXIMATION
CHARGED-PARTICLE REACTIONS
COLLECTIVE MODEL
COULOMB FIELD
COUPLED CHANNEL THEORY
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
DWBA
ELASTIC SCATTERING
ELECTRIC FIELDS
ENERGY RANGE
EXCITATION FUNCTIONS
FORM FACTORS
FUNCTIONS
HEAVY ION REACTIONS
INELASTIC SCATTERING
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NUCLEAR MODELS
NUCLEAR REACTIONS
OXYGEN 16 REACTIONS
OXYGEN 18 REACTIONS
PARTICLE PROPERTIES
SCATTERING
TARGETS
ZINC 64 TARGET