Scattering of 19.5 MeV α-particles by 63Cu, 64Ni, 65Cu and 66Zn

Ivaşcu, M.; Semenescu, G.; Bucurescu, D.; Titirici, Maria Magdalena

doi:10.1016/0375-9474(70)90513-0

Cited by 23 publications

(4 citation statements)

References 12 publications

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“…The corresponding differential cross-sections were estimated to be ∼ 2 mb/sr in the measured angular range for both 19.9 and 30.6 MeV. This result is similar to those obtained in the α+ 65 Cu system [57] and highlights the relatively small cross-section of this process. In the next sections, these results for elastic scattering, neutron transfer and fusion will be compared with Coupled Reaction Channels calculations.…”

Section: Elastic Scatteringsupporting

confidence: 84%

Reactions with the double-Borromean nucleusHe8

et al. 2010

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Differential cross-sections for elastic scattering and neutron transfer reactions along with crosssections for fusion in the 8 He+ 65 Cu system are reported at energies above the Coulomb barrier (E lab = 19.9 and 30.6 MeV). The present work demonstrates the feasibility of using inclusive measurements of characteristic in-beam γ rays with low-intensity (∼ 10 5 pps) radioactive ion beams to obtain the residue cross-sections for fusion and neutron transfer. Exclusive measurements of γ rays in coincidence with light charged particles have been used to further characterize the direct reactions induced by this double-Borromean nucleus. Coupled reaction channels calculations are used to illustrate the important role played by the transfer channels and to help in understanding the influence of the structure of 8 He on the reaction mechanism.

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Section: Elastic Scatteringsupporting

confidence: 84%

Reactions with the double-Borromean nucleusHe8

et al. 2010

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“…5(b). The reaction cross sections for the 4 He beam are quoted from previous works [42,43]. The reaction cross sections were obtained for 6,8 He by fitting the angular distribution [Figs.…”

Section: Estimate Of Breakup Cross Sections For the 6 He Beammentioning

confidence: 99%

“…5(b) and 5(c)] using ECIS97 [44] with real and imaginary potentials having a geometry similar to Refs. [42,43]. For example, in the 6 He+ 65 Cu system at 30 MeV, the parameters for the depth, radius, and diffuseness of the real and imaginary part of the nuclear potential were 118.7 MeV, 1.13 fm, and 0.47 fm and 25.4 MeV, 1.194 fm, and 0.158 fm, respectively.…”

Section: Estimate Of Breakup Cross Sections For the 6 He Beammentioning

confidence: 99%

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Direct and compound reactions induced by unstable helium beams near the Coulomb barrier

et al. 2004

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NESTERReactions induced by radioactive 6,8He beams from the SPIRAL facility were studied on 63,65Cu and 188,190,192Os targets and compared to reactions with the stable 4He projectiles from the Mumbai Pelletron. Partial residue cross sections for fusion and neutron transfer obtained from the measured intensities of characteristic in-beam gamma rays for the 6He+63,65Cu systems are presented. Coincidence measurements of heavy reaction products, identified by their characteristic gamma rays, with projectilelike charged particles, provide direct evidence for a large transfer cross section with Borromean nuclei 6He at 19.5 and 30 MeV and 8He at 27 MeV. Reaction cross sections were also obtained from measured elastic angular distributions for 6,8He + Cu systems. Cross sections for fusion and direct reactions with 4,6He beams on heavier targets of 188,192Os at 30 MeV are also presented. The present work underlines the need to distinguish between various reaction mechanisms leading to the same products before drawing conclusions about the effect of weak binding on the fusion process. The feasibility of extracting small cross sections from inclusive in-beam gamma-ray measurements for reaction studies near the Coulomb barrier with low intensity isotope separation on-line beams is highlighted

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