Inadequacy of the statistical model: Some evidence for compound nuclei in the A 150 and Ex 100-200 MeV region
Light charged-particle multiplicities in the evaporation residue (ER) and fission (FF) channels from the reaction 200MeV 32 S + 100 Mo as well as ER and FF channel cross-sections have been measured and compared to the predictions of the statistical model (SM) to estimate the fission time scale. The...
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| creator | Vardaci, E. Di Nitto, A. Brondi, A. La Rana, G. Moro, R. Nadotchy, P. N. Trotta, M. Ordine, A. Boiano, A. Cinausero, M. Fioretto, E. Prete, G. Rizzi, V. Shetty, D. Barbui, M. Fabris, D. Lunardon, M. Montagnoli, G. Moretto, S. Viesti, G. Gelli, N. Lucarelli, F. Knyazheva, G. N. Kozulin, E. M. |
| description | Light charged-particle multiplicities in the evaporation residue (ER) and fission (FF) channels from the reaction 200MeV
32
S +
100
Mo as well as ER and FF channel cross-sections have been measured and compared to the predictions of the statistical model (SM) to estimate the fission time scale. The statistical model fails in reproducing the whole set of data and no convincing estimate is possible. In particular, while pre-scission multiplicities can be reproduced, the model strongly overestimates proton and alpha particle multiplicities in the ER channel, irrespective of the SM input parameters and prescriptions used for the level density and the transmission coefficients. Same calculations performed on data from literature in the
A
150 and excitation energy
E
x
100-200 MeV region, for the ER channel, provide similar conclusions. These findings repropose the problem of the reliability of the SM in describing the compound-nucleus decay and have a relevant impact on the extraction of the fission delay time through the use of the SM. |
| doi_str_mv | 10.1140/epja/i2009-10912-5 |
| format | Article |
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32
S +
100
Mo as well as ER and FF channel cross-sections have been measured and compared to the predictions of the statistical model (SM) to estimate the fission time scale. The statistical model fails in reproducing the whole set of data and no convincing estimate is possible. In particular, while pre-scission multiplicities can be reproduced, the model strongly overestimates proton and alpha particle multiplicities in the ER channel, irrespective of the SM input parameters and prescriptions used for the level density and the transmission coefficients. Same calculations performed on data from literature in the
A
150 and excitation energy
E
x
100-200 MeV region, for the ER channel, provide similar conclusions. These findings repropose the problem of the reliability of the SM in describing the compound-nucleus decay and have a relevant impact on the extraction of the fission delay time through the use of the SM.</description><identifier>ISSN: 1434-6001</identifier><identifier>EISSN: 1434-601X</identifier><identifier>DOI: 10.1140/epja/i2009-10912-5</identifier><language>eng ; rus</language><publisher>Berlin/Heidelberg: Springer-Verlag</publisher><subject>Hadrons ; Heavy Ions ; Letter ; Nuclear Fusion ; Nuclear Physics ; Particle and Nuclear Physics ; Physics ; Physics and Astronomy</subject><ispartof>The European physical journal. A, Hadrons and nuclei, 2010, Vol.43 (2), p.127-130</ispartof><rights>The Author(s) 2009. This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1140/epja/i2009-10912-5$$EPDF$$P50$$Gspringer$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1140/epja/i2009-10912-5$$EHTML$$P50$$Gspringer$$Hfree_for_read</linktohtml><link.rule.ids>314,780,784,4024,27923,27924,27925,41488,42557,51319</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=22469461$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Vardaci, E.</creatorcontrib><creatorcontrib>Di Nitto, A.</creatorcontrib><creatorcontrib>Brondi, A.</creatorcontrib><creatorcontrib>La Rana, G.</creatorcontrib><creatorcontrib>Moro, R.</creatorcontrib><creatorcontrib>Nadotchy, P. N.</creatorcontrib><creatorcontrib>Trotta, M.</creatorcontrib><creatorcontrib>Ordine, A.</creatorcontrib><creatorcontrib>Boiano, A.</creatorcontrib><creatorcontrib>Cinausero, M.</creatorcontrib><creatorcontrib>Fioretto, E.</creatorcontrib><creatorcontrib>Prete, G.</creatorcontrib><creatorcontrib>Rizzi, V.</creatorcontrib><creatorcontrib>Shetty, D.</creatorcontrib><creatorcontrib>Barbui, M.</creatorcontrib><creatorcontrib>Fabris, D.</creatorcontrib><creatorcontrib>Lunardon, M.</creatorcontrib><creatorcontrib>Montagnoli, G.</creatorcontrib><creatorcontrib>Moretto, S.</creatorcontrib><creatorcontrib>Viesti, G.</creatorcontrib><creatorcontrib>Gelli, N.</creatorcontrib><creatorcontrib>Lucarelli, F.</creatorcontrib><creatorcontrib>Knyazheva, G. N.</creatorcontrib><creatorcontrib>Kozulin, E. M.</creatorcontrib><title>Inadequacy of the statistical model: Some evidence for compound nuclei in the A 150 and Ex 100-200 MeV region</title><title>The European physical journal. A, Hadrons and nuclei</title><addtitle>Eur. Phys. J. A</addtitle><description>Light charged-particle multiplicities in the evaporation residue (ER) and fission (FF) channels from the reaction 200MeV
32
S +
100
Mo as well as ER and FF channel cross-sections have been measured and compared to the predictions of the statistical model (SM) to estimate the fission time scale. The statistical model fails in reproducing the whole set of data and no convincing estimate is possible. In particular, while pre-scission multiplicities can be reproduced, the model strongly overestimates proton and alpha particle multiplicities in the ER channel, irrespective of the SM input parameters and prescriptions used for the level density and the transmission coefficients. Same calculations performed on data from literature in the
A
150 and excitation energy
E
x
100-200 MeV region, for the ER channel, provide similar conclusions. These findings repropose the problem of the reliability of the SM in describing the compound-nucleus decay and have a relevant impact on the extraction of the fission delay time through the use of the SM.</description><subject>Hadrons</subject><subject>Heavy Ions</subject><subject>Letter</subject><subject>Nuclear Fusion</subject><subject>Nuclear Physics</subject><subject>Particle and Nuclear Physics</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><issn>1434-6001</issn><issn>1434-601X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>C6C</sourceid><recordid>eNo9kE1PwzAMhisEEmPwBzjlwrHMTtOUcpsmPiYNceBD3KI0cUamNi39QOzf022Ii23Zr63XTxRdIlwjCphRs9EzzwHyGCFHHqdH0QRFImIJ-HH8XwOeRmddtwEAwXM5iapl0Ja-Bm22rHas_yTW9br3Xe-NLllVWypv2UtdEaNvbykYYq5umamrph6CZWEwJXnmw353zjAFpsf-3Q9DgHi0xJ7onbW09nU4j06cLju6-MvT6O3-7nXxGK-eH5aL-SpuUIg0znNhtOEFkUmyIrM5OOfSzKIRWeJuMuSWTGpJpmkGVhYWZFLIMSB3BeYmmUZXh7uN7sY3XKuD8Z1qWl_pdqs4FzIXEkddctB14yisqVWbemjDaE0hqB1ZtSOr9mTVnqxKk18utmuk</recordid><startdate>2010</startdate><enddate>2010</enddate><creator>Vardaci, E.</creator><creator>Di Nitto, A.</creator><creator>Brondi, A.</creator><creator>La Rana, G.</creator><creator>Moro, R.</creator><creator>Nadotchy, P. 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32
S +
100
Mo as well as ER and FF channel cross-sections have been measured and compared to the predictions of the statistical model (SM) to estimate the fission time scale. The statistical model fails in reproducing the whole set of data and no convincing estimate is possible. In particular, while pre-scission multiplicities can be reproduced, the model strongly overestimates proton and alpha particle multiplicities in the ER channel, irrespective of the SM input parameters and prescriptions used for the level density and the transmission coefficients. Same calculations performed on data from literature in the
A
150 and excitation energy
E
x
100-200 MeV region, for the ER channel, provide similar conclusions. These findings repropose the problem of the reliability of the SM in describing the compound-nucleus decay and have a relevant impact on the extraction of the fission delay time through the use of the SM.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer-Verlag</pub><doi>10.1140/epja/i2009-10912-5</doi><tpages>4</tpages><oa>free_for_read</oa></addata></record> |
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| language | eng ; rus |
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| source | SpringerNature Journals |
| subjects | Hadrons Heavy Ions Letter Nuclear Fusion Nuclear Physics Particle and Nuclear Physics Physics Physics and Astronomy |
| title | Inadequacy of the statistical model: Some evidence for compound nuclei in the A 150 and Ex 100-200 MeV region |
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