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

Abstract

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 projectilemore » were analyzed using the distorted-wave Born approximation and also the coupled-channels approach with collective form factors.« less

Authors:
; ; ; ;  [1];  [2];  [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)
Publication Date:
OSTI Identifier:
7014956
Resource Type:
Journal Article
Journal Name:
Physical Review, C (Nuclear Physics); (United States)
Additional Journal Information:
Journal Volume: 50:2; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; OXYGEN 16 REACTIONS; ELASTIC SCATTERING; INELASTIC SCATTERING; OXYGEN 18 REACTIONS; ZINC 64 TARGET; ANGULAR DISTRIBUTION; COLLECTIVE MODEL; COULOMB FIELD; COUPLED CHANNEL THEORY; DIFFERENTIAL CROSS SECTIONS; DWBA; EXCITATION FUNCTIONS; FORM FACTORS; MEV RANGE 10-100; BORN APPROXIMATION; CHARGED-PARTICLE REACTIONS; CROSS SECTIONS; DISTRIBUTION; ELECTRIC FIELDS; ENERGY RANGE; FUNCTIONS; HEAVY ION REACTIONS; MATHEMATICAL MODELS; MEV RANGE; NUCLEAR MODELS; NUCLEAR REACTIONS; PARTICLE PROPERTIES; SCATTERING; TARGETS; 663450* - Heavy-Ion-Induced Reactions & Scattering- (1992-); 663550 - Nuclear Mass Ranges- A=59-89- (1992-)

Citation Formats

Salem-Vasconcelos, S, Takagui, E M, Bechara, M J, Koide, K, Dietzsch, O, Jr, A B.N., and Takai, H. Elastic and inelastic scattering of [sup 16]O and [sup 18]O ions from [sup 64]Zn at energies near the Coulomb barrier. United States: N. p., 1994. Web. doi:10.1103/PhysRevC.50.927.
Salem-Vasconcelos, S, Takagui, E M, Bechara, M J, Koide, K, Dietzsch, O, Jr, A B.N., & Takai, H. Elastic and inelastic scattering of [sup 16]O and [sup 18]O ions from [sup 64]Zn at energies near the Coulomb barrier. United States. doi:10.1103/PhysRevC.50.927.
Salem-Vasconcelos, S, Takagui, E M, Bechara, M J, Koide, K, Dietzsch, O, Jr, A B.N., and Takai, H. Mon . "Elastic and inelastic scattering of [sup 16]O and [sup 18]O ions from [sup 64]Zn at energies near the Coulomb barrier". United States. doi:10.1103/PhysRevC.50.927.
@article{osti_7014956,
title = {Elastic and inelastic scattering of [sup 16]O and [sup 18]O ions from [sup 64]Zn at energies near the Coulomb barrier},
author = {Salem-Vasconcelos, S and Takagui, E M and Bechara, M J and Koide, K and Dietzsch, O and Jr, A B.N. and Takai, H},
abstractNote = {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.},
doi = {10.1103/PhysRevC.50.927},
journal = {Physical Review, C (Nuclear Physics); (United States)},
issn = {0556-2813},
number = ,
volume = 50:2,
place = {United States},
year = {1994},
month = {8}
}