Investigation of the heavy nuclei fission with anomalously high values of the fission fragments total kinetic energy
Binary fission of 232Th and 238U induced by fast neutrons were under intent investigation in the IPPE during recent years. These measurements were performed with a twin ionization chamber with Frisch grids. Signals from the detector were digitized for further processing with a specially developed so...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2018-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://doi.org/10.1051/epjconf/201816900011 |
| _version_ | 1818622078114332672 |
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| author | Khryachkov Vitaly Goverdovskii Andrei Ketlerov Vladimir Mitrofanov Vecheslav Sergachev Alexei |
| author_facet | Khryachkov Vitaly Goverdovskii Andrei Ketlerov Vladimir Mitrofanov Vecheslav Sergachev Alexei |
| author_sort | Khryachkov Vitaly |
| collection | DOAJ |
| description | Binary fission of 232Th and 238U induced by fast neutrons were under intent investigation in the IPPE during recent years. These measurements were performed with a twin ionization chamber with Frisch grids. Signals from the detector were digitized for further processing with a specially developed software. It results in information of kinetic energies, masses, directions and Bragg curves of registered fission fragments. Total statistics of a few million fission events were collected during each experiment. It was discovered that for several combinations of fission fragment masses their total kinetic energy was very close to total free energy of the fissioning system. The probability of such fission events for the fast neutron induced fission was found to be much higher than for spontaneous fission of 252Cf and thermal neutron induced fission of 235U. For experiments with 238U target the energy of incident neutrons were 5 MeV and 6.5 MeV. Close analysis of dependence of fission fragment distribution on compound nucleus excitation energy gave us some explanation of the phenomenon. It could be a process in highly excited compound nucleus which leads the fissioning system from the scission point into the fusion valley with high probability. |
| first_indexed | 2024-12-16T18:19:27Z |
| format | Article |
| id | doaj.art-59f0882ee5794af797953b2010553589 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-16T18:19:27Z |
| publishDate | 2018-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-59f0882ee5794af797953b20105535892022-12-21T22:21:36ZengEDP SciencesEPJ Web of Conferences2100-014X2018-01-011690001110.1051/epjconf/201816900011epjconf_theory42018_00011Investigation of the heavy nuclei fission with anomalously high values of the fission fragments total kinetic energyKhryachkov VitalyGoverdovskii AndreiKetlerov VladimirMitrofanov VecheslavSergachev AlexeiBinary fission of 232Th and 238U induced by fast neutrons were under intent investigation in the IPPE during recent years. These measurements were performed with a twin ionization chamber with Frisch grids. Signals from the detector were digitized for further processing with a specially developed software. It results in information of kinetic energies, masses, directions and Bragg curves of registered fission fragments. Total statistics of a few million fission events were collected during each experiment. It was discovered that for several combinations of fission fragment masses their total kinetic energy was very close to total free energy of the fissioning system. The probability of such fission events for the fast neutron induced fission was found to be much higher than for spontaneous fission of 252Cf and thermal neutron induced fission of 235U. For experiments with 238U target the energy of incident neutrons were 5 MeV and 6.5 MeV. Close analysis of dependence of fission fragment distribution on compound nucleus excitation energy gave us some explanation of the phenomenon. It could be a process in highly excited compound nucleus which leads the fissioning system from the scission point into the fusion valley with high probability.https://doi.org/10.1051/epjconf/201816900011 |
| spellingShingle | Khryachkov Vitaly Goverdovskii Andrei Ketlerov Vladimir Mitrofanov Vecheslav Sergachev Alexei Investigation of the heavy nuclei fission with anomalously high values of the fission fragments total kinetic energy EPJ Web of Conferences |
| title | Investigation of the heavy nuclei fission with anomalously high values of the fission fragments total kinetic energy |
| title_full | Investigation of the heavy nuclei fission with anomalously high values of the fission fragments total kinetic energy |
| title_fullStr | Investigation of the heavy nuclei fission with anomalously high values of the fission fragments total kinetic energy |
| title_full_unstemmed | Investigation of the heavy nuclei fission with anomalously high values of the fission fragments total kinetic energy |
| title_short | Investigation of the heavy nuclei fission with anomalously high values of the fission fragments total kinetic energy |
| title_sort | investigation of the heavy nuclei fission with anomalously high values of the fission fragments total kinetic energy |
| url | https://doi.org/10.1051/epjconf/201816900011 |
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