Study of the 6Li + 16O light heavy-ion system around the Coulomb barrier

doi:10.1016/0375-9474(86)90513-0

Nuclear Physics A

Volume 452, Issue 1, 14 April 1986, Pages 150-172

https://doi.org/10.1016/0375-9474(86)90513-0 Get rights and content

Abstract

Total cross sections of the light heavy-ion reactions $^{16} O (^{6} Li, p_{i})^{21} Ne, i = 0–10$ , have been measured for beam energies E_Li = 4.5–8.0 MeV in steps of 100 keV. Additional excitation functions of the inclusive reactions $^{16} O (^{6} Li, xγ), x = p, n and α$ , were taken for E_Li = 4.1–12.5 MeV. The ⁶Li + ¹⁶O reaction can be understood as a predominant compound-nucleus process as extensive Hauser-Feshbach calculations show. A comprehensive statistical analysis yields a coherence width $Γ = 130 ± 20 keV for E_{x} (^{22} Na) ≈ 19 MeV$ . Statistically significant deviations from pure fluctuation phenomena are found in most excitation functions at $E_{x} (^{22} Na) = 17.9, 18.4, 19.2 and 20.2 MeV$ . Interpreting these structures with widths 400 ≤ Γ_tot ≤ 800 keV as intermediate-width resonances in terms of a rotational band, tentative spin assignments can be given.

References (25)

W. Feldman et al.
Nucl. Phys.
(1969)
P.M. Endt et al.
Nucl. Phys.
(1978)
F. Ajzenberg-Selove
Nucl. Phys.
(1983)
K. Glasner et al.
Phys. Rev.
(1983)
A. Van der Woude
Nucl. Phys.
(1966)
L.C. Dennis et al.
Phys. Rev.
(1979)
N. Marquardt
Phys. Rev.
(1983)
N. Cindro
Riv. Nuovo Cim.
(1981)
T.M. Cormier
Ann. Rev. Nucl. Part. Sci.
(1982)
R.M. de Vries et al.
Phys. Rev. Lett.
(1977)

M.E. Brandan

Phys. Rev. Lett.

(1982)

K. Glasner

Cited by (7)

Investigation of 6Li + 16O and 7Li + 16O reactions at low energies
1999, Nuclear Physics A
The cross sections for the characteristic γ-rays of the residual nuclei following $^{6} Li+^{16} O$ and $^{7} Li+^{16} O$ reactions have been measured at low energies with HPGe detectors. The fusion cross sections obtained from these γ-ray cross sections for both the systems are found to be in excellent agreement with the total reaction cross sections and this indicates that there is no inhibition of fusion cross sections for these systems at low energies, which is in contradiction to the results obtained from the measurement of evaporation residues and light particles. These cross sections also show good agreement with the IWBC (Incoming Wave Boundary Condition) model and the 1-D BPM (One-Dimensional Barrier Penetration Model) calculations. The critical angular momenta (l_cr) dediced from the fusion cross sections are also found to have an energy dependence similar to other Li-induced reactions.
Energy levels of light nuclei A = 18-19
1995, Nuclear Physics, Section A
Energy levels of A = 21-44 nuclei (VII)
1990, Nuclear Physics, Section A
The experimentally determined properties of A = 21–44 nuclides are complied and evaluated with special emphasis on nuclear spectroscopy.
Separate tables for each of the nuclides reviewed present the available information about the following properties (in this order):
- •
  - excitation energies E_x,
- •
  - γ-ray branching ratios b(γ),
- •
  - γ-ray mixing ratios σ,
- •
  - lifetimes γ_m or widths Λ,
- •
  - neutron, proton, or α-particle resonances,
- •
  - partial widths,
- •
  - single-nucleon transfer reactions,
- •
  - beta-decay,
- •
  - arguments for spin and parity (J^π) and isospin (T) assignments.
For each nuclide a master table summarizing the “best” or adopted values for E_x, J^π; T and τ_m or Λ precedes the auxiliary tables listed above.
The review of each A-chain concludes with a discussion of isospin multiplets.
Figures are presented of the level schemes of all nuclei and, for each A-chain, an overview of the relative energies of the ground states and lowest analogue states of all nuclei in the chain.
Fusion calculations for the 6,7Li+16O systems
2002, Physical Review C - Nuclear Physics
Breakup vs fusion inhibition of Li-induced reactions at low energies
2001, Physical Review C - Nuclear Physics
Application of the statistical model to the light heavy-ion system6Li +6Li
1990, Zeitschrift für Physik A Atomic Nuclei

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Nuclear Physics A

Abstract

References (25)

Nucl. Phys.

Nucl. Phys.

Nucl. Phys.

Phys. Rev.

Nucl. Phys.

Phys. Rev.

Phys. Rev.

Riv. Nuovo Cim.

Ann. Rev. Nucl. Part. Sci.

Phys. Rev. Lett.

Phys. Rev. Lett.

Cited by (7)

Investigation of <sup>6</sup>Li + <sup>16</sup>O and <sup>7</sup>Li + <sup>16</sup>O reactions at low energies

Energy levels of light nuclei A = 18-19

Energy levels of A = 21-44 nuclei (VII)

Fusion calculations for the <sup>6,7</sup>Li+<sup>16</sup>O systems

Breakup vs fusion inhibition of Li-induced reactions at low energies

Application of the statistical model to the light heavy-ion system<sup>6</sup>Li +<sup>6</sup>Li

Study of the 6Li + 16O light heavy-ion system around the Coulomb barrier☆

Abstract

Nucl. Phys.

Nucl. Phys.

Nucl. Phys.

Phys. Rev.

Nucl. Phys.

Phys. Rev.

Phys. Rev.

Riv. Nuovo Cim.

Ann. Rev. Nucl. Part. Sci.

Phys. Rev. Lett.

Phys. Rev. Lett.

Study of the ⁶Li + ¹⁶O light heavy-ion system around the Coulomb barrier☆