Nonadiabatic Transition of the Fissioning Nucleus at Scission:. the Time Scale
| hal.structure.identifier | Physique théorique [THEORIE] | |
| dc.contributor.author | CARJAN, N. | |
| hal.structure.identifier | Horia Hulubei National Institute of Physics and Nuclear Engineering [NIPNE] | |
| dc.contributor.author | RIZEA, M. | |
| dc.date.issued | 2012 | |
| dc.identifier.issn | 0218-3013 | |
| dc.description.abstractEn | A time-dependent approach to the scission process, i.e., to the transition from two fragments connected by a thin neck (deformation αi) to two separated fragments (deformation αf) is presented. This transition is supposed to take place in a very short time interval ΔT. Our approach follows the evolution from αi to αf 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 = 70 to AL = 118 (AL being the light fragment mass) taking into account all neutron states (Ω = 1/2, 3/2, ..., 11/2) that are bound in 236U at αi. ΔT is taken as parameter having values from 0.25×10-22 to 6×10-22 s. The resulting scission neutron multiplicities νsc and primary fragments' excitation energies E* sc are compared with those obtained in the frame of the sudden approximation (ΔT = 0). As expected, shorter is the transition time more excited are the fragments and more neutrons are emitted, the sudden approximation being an upper limit. For ΔT = 10-22 which is a realistic value, the time dependent results are 20% below this limit. For transition times longer than 6×10-22 s the adiabatic limit is reached: No scission neutrons are emitted anymore and the excitation energy at αf is negligible. | |
| dc.language.iso | en | |
| dc.publisher | World Scientific Publishing | |
| dc.subject.en | Low-energy nuclear fission | |
| dc.subject.en | scission properties | |
| dc.subject.en | bi-dimensional time-dependent Schrödinger equation | |
| dc.subject.en | time-dependent potential | |
| dc.subject.en | Ordinary and partial differential equations | |
| dc.subject.en | boundary value problems | |
| dc.subject.en | Finite-difference methods | |
| dc.subject.en | Neutron-induced fission | |
| dc.title.en | Nonadiabatic Transition of the Fissioning Nucleus at Scission:. the Time Scale | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1142/S0218301312500310 | |
| dc.subject.hal | Physique [physics]/Physique Nucléaire Théorique [nucl-th] | |
| bordeaux.journal | International Journal of Modern Physics E | |
| bordeaux.page | 1250031 | |
| bordeaux.volume | 21 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | in2p3-00712791 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Non spécifiée | |
| hal.origin.link | https://hal.archives-ouvertes.fr//in2p3-00712791v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=International%20Journal%20of%20Modern%20Physics%20E&rft.date=2012&rft.volume=21&rft.spage=1250031&rft.epage=1250031&rft.eissn=0218-3013&rft.issn=0218-3013&rft.au=CARJAN,%20N.&RIZEA,%20M.&rft.genre=article |
Files in this item
| Files | Size | Format | View |
|---|---|---|---|
|
There are no files associated with this item. |
|||