Neutron emission from projectile-like and target-like fragments in the18O+48Ti reaction atE(18O)=116 MeV

Chambon, B.; Drain, D.; Pastor, C.; Dauchy, A.; Giorni, A.; Morand, C.

doi:10.1007/bf01411670

Cited by 6 publications

(2 citation statements)

References 7 publications

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“…7.5 degrees. These structures originate in decays of discrete low-lying excited states of the projectile-like fragment, as already reported for coincidence measurements between neutrons and light projectile-like nuclei [16,17]. This phenomenon can be clearly seen from Fig.…”

Section: Data Evaluationmentioning

confidence: 59%

Evidence for an absorption effect in neutron emission in the20Ne +58Ni reaction at 30 MeV per nucleon

Cheynis

Chambon

Drain

et al. 1990

Z. Physik A - Atomic Nuclei

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Neutron energy spectra were analysed at various angles in coincidence with projectile-like fragments in the reaction ZONe+ 58Ni at 30 MeV per nucleon. The data have been parametrized with a three moving source fit, taking into account the emission from discrete excited states of the coincident light fragments and the recoil effect due to the emission of neutrons by light nuclei. A nucleon-nucleon scattering description of the intermediate velocity source gives good fits to the data. However the necessity of introducing a reabsorption effect in the projectile-like and target-like nuclei for the nucleons from that source is demonstrated by testing the momentum and energy balances in the fitting procedure. The mean free path of nucleons in nuclear matter is determined. A good agreement is then obtained for the lowest momentum transfers where single scattering dominates. For the largest momentum transfer another mechanism such as double scattering or one-body friction must be introduced in order to reproduce the data.

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Section: Data Evaluationmentioning

confidence: 59%

Evidence for an absorption effect in neutron emission in the20Ne +58Ni reaction at 30 MeV per nucleon

Cheynis

Chambon

Drain

et al. 1990

Z. Physik A - Atomic Nuclei

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“…Indications of sequential PF breakup were recently also found in an investigation of the 6.5 MeV/u 180+48Ti reaction by Chambon etal. [7]. Furthermore, Tserruya et al [8] reported evidence for preequilibrium n emission in DIC of 11.9 MeV/u a6Kr on 166Er.…”

Section: Introductionmentioning

confidence: 94%

Sequential emission of neutrons in the reaction16O+64Ni at 7.5?12 MeV per nucleon

et al. 1985

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Neutron energy and angular distributions have been studied in coincidence with projectilelike fragments (PF) for quasielastic and deeply inelastic collisions of 160 on 64Ni at 7.5-12 MeV/u bombarding energy. The neutron yield can be explained assuming only two isotropically emitting sources: i) sequential emission from fully accelerated PF and ii) evaporation from fully accelerated targetlike fragments (TF). For Z=6 and Z=8 ejectiles known excited states in 13C and 170 could be identified. For oxygen, this suggests a direct excitation process, n pickup from the target. No significant evidence for preequilibrium neutron emission was found even at the highest bombarding energy. The TF temperatures and neutron multiplicities are consistent with the assumption that thermal equilibrium was reached during the binary reaction.

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Excitation of discrete particle-unbound states in heavy-ion collisions

et al. 1987

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Neutron emission from projectile-like and target-like fragments in the18O+48Ti reaction atE(18O)=116 MeV

Cited by 6 publications

References 7 publications

Evidence for an absorption effect in neutron emission in the20Ne +58Ni reaction at 30 MeV per nucleon

Evidence for an absorption effect in neutron emission in the20Ne +58Ni reaction at 30 MeV per nucleon

Sequential emission of neutrons in the reaction16O+64Ni at 7.5?12 MeV per nucleon

Excitation of discrete particle-unbound states in heavy-ion collisions

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