Elsevier

Nuclear Physics A

Volume 564, Issue 2, 15 November 1993, Pages 314-328
Nuclear Physics A

Cross-section measurements for the 9Be + 9Be, 7Ll +11B and α + 14C reactions at low energies

https://doi.org/10.1016/0375-9474(93)90523-ZGet rights and content

Abstract

The 9Be + 9Be, 7Li+11B and α +14C reactions, leading to the 18O compound state in the excitation energy range between 25 and 31 MeV, have been studied by measurement of the cross sections for the characteristic g-rays emitted by the residual nuclei. The cross sections for the two-particle emission channels (nn, np, na, aa) are much larger in the two heavy-ion reactions, 9e+9Be and 7Li + 11B, than in the a + 14C reaction. It is suggested that the large enhancement in the nn and np channels, which do not include any transfer processes, indicates that 9Be+ 9Be and 7Li + 11B form a largely deformed molecular state, from which only low-energy particles can be emitted. A broad resonance is observed at ∼ 28 MeV 18O excitation energy in the 9Be+9Be→ nn16O 7.12 MeV, 7Li+ 11Bnn16O 7.12 MeV and 9Be +9Benp16N 0.397 MeV reaction channels.

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Cited by (4)

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This work was supported in part by the Natural Sciences and Engineering Council of Canada.

1

Present address: Cyclic Accelerator Division, Saha Institute of Nuclear Physics, Bidhannagar, Calcutta 700 064, India.

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