Study of the 10,11B+10,11B reactions up to E/A≈5 MeV

Coimbra, M.M.; Anjos, R. M.; Added, N.; Filho, N. Carlin; Fante, L.; Figueira, M. C. S.; Ramirez, G.; Szanto, E.M.; Toledo, A. Szanto de

doi:10.1016/0375-9474(91)90521-7

Cited by 18 publications

(3 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Strongly energy damped yields have been investigated in the 10,11 B+ 10,11 B reactions simultaneously with fusion-evaporation residue yields [82]. For the 10,11 B + 11 B channels, the observed energy spectra and excitation functions of the evaporation residues are consistent with the general fusion systematics in this mass range.…”

Section: System-by-system Discussionmentioning

confidence: 53%

“…At least part of the missing flux may be directed to strongly energy damped decay yields in the Z=5 channel, which are found to be strongly enhanced. These yields demonstrate binary characteristics according to their velocity distributions (which are peaked at higher velocities than expected for evaporation residues) and isotropic angular distributions [82]. A similar enhancement in the 11 B channel is not observed in either the 10,11 B+ 11 B or the 9 Be+ 10,11 B reactions up to E lab /A= 4 MeV.…”

Section: System-by-system Discussionmentioning

confidence: 63%

See 1 more Smart Citation

Binary decay of light nuclear systems

1999

View full text Add to dashboard Cite

A review of the characteristic features found in fully energy-damped, binarydecay yields from light heavy-ion reactions with 20 ≤ A target + A projectile ≤ 80 is presented. The different aspects of these yields that have been used to support models of compound-nucleus (CN) fission and deep-inelastic dinucleus orbiting are highlighted. Cross section calculations based on the statistical phase space at different stages of the reaction are presented and compared to the experimental results. Although the statistical models are found to reproduce most of the observed experimental behaviors, an additional reaction component corresponding to a heavy-ion resonance or orbiting mechanism is also evident in certain systems. The system dependence of this second component is discussed. The extent to which the binary yields in very light systems (A CN ≤ 32) can be viewed as resulting from a fusion-fission mechanism is explored. A number of unresolved questions, such as whether the different observed behaviors reflect characteristically different reaction times, are discussed. I. INTRODUCTIONAs the interaction energy for a heavy-ion reaction increases above the Coulomb barrier, the reaction grazing angle moves to more forward angles so that, by a value of about 20% above the barrier, very small quasielastic and single-nucleon transfer reaction yields are expected at larger scattering angles. Instead, the incident flux that might be expected to scatter to larger angles, corresponding to smaller impact parameters, is trapped by the formation of a compound nucleus. For lighter systems, this compound system subsequently decays by light particle and γ-ray emission, with a very small heavy-fragment (A > 4) emission component. The experimental observation of significant large-angle, elastic-scattering cross sections at energies well above the Coulomb barrier has therefore been viewed with Calculation of fission cross sections in the statistical models is based on the Hauser-Feshbach formalism. For a compound nucleus of spin J that is populated with a partial fusion cross section of σ J , the partial fission cross section is given in terms of the ratio of the fission decay width Γ f is J to the total decay width for this spin Γ tot J , with

show abstract

Section: System-by-system Discussionmentioning

confidence: 53%

Section: System-by-system Discussionmentioning

confidence: 63%

Binary decay of light nuclear systems

1999

View full text Add to dashboard Cite

show abstract

“…On the other hand, in cases where halo nuclei are used as projectiles in light heavy ion collisions, exotic features lead to an enhancement of the fusion cross section. Another interesting feature associated with light heavy-ion reactions is the observation of the break up of dinuclear system resulting to strongly damped inelastic processes [3]. Concerning the limitation of the fusion cross section and the collision dynamics responsible for it, contradictory results have been reported in several light heavy-ion systems.…”

Section: Introductionmentioning

confidence: 99%

Statistical model calculations of the 7Li +11 Β reaction

Tsabaris¹,

Papadopoulos²,

Vlastou³

et al. 2019

hnps

View full text Add to dashboard Cite

The 7Li + 11 Β reaction has been studied in the energy range from a little below to about three times the Coulomb barrier by measuring the cross section of the 7- ray transitions in the residual nuclei produced. Statistical compound nucleus calculations have been performed in order to interpret the experimental data as well as to extract cross sections of the individual exit channels. The statistical compound nucleus theory can reproduce rather well the absolute j - ray and the various reaction channel excitation functions.

show abstract