Dynamical scission model
| hal.structure.identifier | Horia Hulubei National Institute of Physics and Nuclear Engineering [NIPNE] | |
| dc.contributor.author | RIZEA, M. | |
| hal.structure.identifier | Physique théorique [THEORIE] | |
| dc.contributor.author | CARJAN, N. | |
| dc.date.issued | 2013 | |
| dc.identifier.issn | 0375-9474 | |
| dc.description.abstractEn | A time-dependent microscopic approach to the scission process, i.e., the transition from two fragments connected by a thin neck (αiαi) to two separated fragments (αfαf), which takes place in a short time interval ΔT, is presented. We follow the evolution from αiαi to αfαf of all occupied neutron states by solving numerically the two-dimensional time-dependent Schrödinger equation with time-dependent potential. Calculations are performed for mass divisions from AL=70AL=70 to AL=118AL=118 (ALAL being the light-fragment mass). The duration of the neck rupture ΔT is taken as parameter having values from 0.25×10−220.25×10−22 to 6×10−22 s6×10−22 s. The resulting scission-neutron multiplicities νscνsc and primary fragment excitation energies View the MathML sourceEsc⁎ are compared with those obtained in the frame of the sudden approximation (ΔT=0ΔT=0). As expected, the sudden approximation is an upper limit. For ΔT=10−22 sΔT=10−22 s, which is a realistic value, the time-dependent results are 15%15% to 20%20% below this limit. For transition times longer than 6×10−22 s6×10−22 s the adiabatic limit is reached. The probability and current densities of the unbound neutrons at scission are also calculated. They provide a detailed picture of the emission mechanism and a hint for the angular distribution of the scission neutrons with respect to the fission axis. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject.en | Probability and current densities of the scission neutrons | |
| dc.subject.en | Bi-dimensional time-dependent Schrödinger equation | |
| dc.subject.en | Time-dependent potential | |
| dc.subject.en | Low-energy nuclear fission | |
| dc.subject.en | Scission properties | |
| dc.subject.en | Partition of the excitation energy between the fission fragments | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.nuclphysa.2013.04.014 | |
| dc.subject.hal | Physique [physics]/Physique Nucléaire Théorique [nucl-th] | |
| bordeaux.journal | Nuclear Physics A | |
| bordeaux.page | 50-68 | |
| bordeaux.volume | 909 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | in2p3-00845856 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Non spécifiée | |
| dc.title.it | Dynamical scission model | |
| hal.origin.link | https://hal.archives-ouvertes.fr//in2p3-00845856v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Nuclear%20Physics%20A&rft.date=2013&rft.volume=909&rft.spage=50-68&rft.epage=50-68&rft.eissn=0375-9474&rft.issn=0375-9474&rft.au=RIZEA,%20M.&CARJAN,%20N.&rft.genre=article |
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