Pre- and post-scission neutron emission in the reaction180Hf(40Ar, fission) atE lab=216 MeV

Кузнецов, А. В.; Rubchenya, V. A.; Вахтин, Д. Н.; Lyapin, V. G.; Alkhazov, I. D.; Khlebnikov, S. V.; Osetrov, O. I.; Tiourin, G. P.; Trzaska, W. H.; Äystö, J.

doi:10.1007/bf02769528

Cited by 1 publication

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“…The neutron energy determination was also based on TOF technique. Each of the seven PSNDs [24,25] surrounding the chamber consisted of a 100 cm long quartz tube with a diameter of 6 cm filled with 2.3 l of NE-213 liquid scintillator, and enclosed by two photo-multipliers coupled directly to each end of the scintillator. The time resolution of PSND was measured with a collimated 60 Co g-source to be 1.4 ns.…”

Section: Methodsmentioning

confidence: 99%

Neutron and fragment yields in proton-induced fission of 238U at intermediate energies

Rubchenya

Вахтин

Äystö

et al. 2001

Nuclear Instruments and Methods in Physics Research Section A:

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The primary fission fragment mass and kinetic energy distributions, and neutron multiplicities as function of fragment mass have been measured in the proton-induced fission of 238 U at energies E p ¼ 20, 35, 50 and 60 MeV using time-of-flight technique. Pre-scission and post-scission neutron multiplicities have been extracted from double differential distributions. The fragment mass dependence of the post-scission neutron multiplicities reveals the gross nuclear shell structure effect even at the higher proton energies we measured. The yields of neutron-rich fission products in the fission of 238 U by 25 MeV protons were measured using an ion guide-based isotope separator technique. The results indicate enhancement for superasymmetric mass division at intermediate excitation energy of the fissioning nucleus. The experimental results have been analysed in the framework of a time-dependent statistical model with inclusion of nuclear friction effects in the fission process. #

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Section: Methodsmentioning

confidence: 99%