Emission of fast neutrons in deep-inelastic collisions of 16O on Ni

Gemmeke, H.; Netter, P.; Richter, A.; Lassen, L.; Lewandowski, Sławomir; Lücking, W.; Schreck, R.

doi:10.1016/0370-2693(80)90585-7

Cited by 23 publications

(4 citation statements)

References 14 publications

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“…This value is less accurate since at higher energies kinematics facilitates the discrimination between neutrons emitted from the two sources (PF, TF). The aforementioned evidence contradicts our earlier suggestion of preequilibrium neutron emission in the reaction 6 MeV/u 10 O + ~ 8, 64Ni [5]. Our former statement was mainly inferred from the strong increase of the PF-coincident neutron yield in forward direction being not consistent with statistical evaporation from fragments in thermal equilibrium.…”

Section: Discussioncontrasting

confidence: 72%

“…First experimental evidence for non-equilibrium neutron emission in DIC has been reported independently by Gemmeke etal. [5] (160+58'6~Ni at 6MeV/u) and by Gavron etal. [6] (160-I-93Nb at 12.75 MeV/u).…”

Section: Introductionmentioning

confidence: 94%

“…Also in DIC preequilibrium effects and direct reaction mechanisms are expected to become more and more important with increasing energy. In an attempt to see whether preequilibrium n emission sets in at higher energies we have extended our earlier investigation of the system 160+ 58'64Ni [5] at 3 MeV/u above the barrier to the energy range 4.7-9 MeV/u. Special effort was made to take neutron data in a sufficiently large angular range with good angular resolution in forward direction including the vicinity of the emission angle of the detected PF.…”

Section: Introductionmentioning

confidence: 98%

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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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Section: Discussioncontrasting

confidence: 72%

Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 98%

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

et al. 1985

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“…In accordance with this, it is possible that part of the forward directed particles with Z < 6 is also formed at the stage of interaction until the total dissipation of the initial kinetic energy occurs. Similar conclusions concerning the time of formation of the forward directed protons, e-particles and neutrons in other target-projectile combinations have been made, e.g., in [16][17][18][19].…”

Section: Angular Distributionsmentioning

confidence: 56%