Constraining statistical-model parameters using fusion and spallation reactions
The de-excitation of compound nuclei has been successfully described for several decades by means of statistical models. However, such models involve a large number of free parameters and ingredients that are often underconstrained by experimental data. We show how the degeneracy of the model ingre...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2011-10-01
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| Series: | EPJ Web of Conferences |
| Online Access: | http://dx.doi.org/10.1051/epjconf/20111710003 |
| _version_ | 1818650066636767232 |
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| author | Charity Robert J. Mancusi Davide Cugnon Joseph |
| author_facet | Charity Robert J. Mancusi Davide Cugnon Joseph |
| author_sort | Charity Robert J. |
| collection | DOAJ |
| description | The de-excitation of compound nuclei has been successfully described for several decades by means of statistical models. However, such models involve a large number of free parameters and ingredients that are often underconstrained by experimental data. We show how the degeneracy of the model ingredients can be partially lifted by studying different entrance channels for de-excitation, which populate different regions of the parameter space of the compound nucleus. Fusion reactions, in particular, play an important role in this strategy because they fix three out of four of the compound-nucleus parameters (mass, charge and total excitation energy). The present work focuses on fission and intermediate-mass-fragment emission cross sections. We prove how equivalent parameter sets for fusion-fission reactions can be resolved using another entrance channel, namely spallation reactions. Intermediate-mass-fragment emission can be constrained in a similar way. An interpretation of the best-fit IMF barriers in terms of the Wigner energies of the nascent fragments is discussed. |
| first_indexed | 2024-12-17T01:44:19Z |
| format | Article |
| id | doaj.art-966ce38e26324745ab496afb79ed1731 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-17T01:44:19Z |
| publishDate | 2011-10-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-966ce38e26324745ab496afb79ed17312022-12-21T22:08:14ZengEDP SciencesEPJ Web of Conferences2100-014X2011-10-01171000310.1051/epjconf/20111710003Constraining statistical-model parameters using fusion and spallation reactionsCharity Robert J.Mancusi DavideCugnon JosephThe de-excitation of compound nuclei has been successfully described for several decades by means of statistical models. However, such models involve a large number of free parameters and ingredients that are often underconstrained by experimental data. We show how the degeneracy of the model ingredients can be partially lifted by studying different entrance channels for de-excitation, which populate different regions of the parameter space of the compound nucleus. Fusion reactions, in particular, play an important role in this strategy because they fix three out of four of the compound-nucleus parameters (mass, charge and total excitation energy). The present work focuses on fission and intermediate-mass-fragment emission cross sections. We prove how equivalent parameter sets for fusion-fission reactions can be resolved using another entrance channel, namely spallation reactions. Intermediate-mass-fragment emission can be constrained in a similar way. An interpretation of the best-fit IMF barriers in terms of the Wigner energies of the nascent fragments is discussed.http://dx.doi.org/10.1051/epjconf/20111710003 |
| spellingShingle | Charity Robert J. Mancusi Davide Cugnon Joseph Constraining statistical-model parameters using fusion and spallation reactions EPJ Web of Conferences |
| title | Constraining statistical-model parameters using fusion and spallation reactions |
| title_full | Constraining statistical-model parameters using fusion and spallation reactions |
| title_fullStr | Constraining statistical-model parameters using fusion and spallation reactions |
| title_full_unstemmed | Constraining statistical-model parameters using fusion and spallation reactions |
| title_short | Constraining statistical-model parameters using fusion and spallation reactions |
| title_sort | constraining statistical model parameters using fusion and spallation reactions |
| url | http://dx.doi.org/10.1051/epjconf/20111710003 |
| work_keys_str_mv | AT charityrobertj constrainingstatisticalmodelparametersusingfusionandspallationreactions AT mancusidavide constrainingstatisticalmodelparametersusingfusionandspallationreactions AT cugnonjoseph constrainingstatisticalmodelparametersusingfusionandspallationreactions |