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|Title:||Studies of fission fragment yields via high-resolution gamma-ray spectroscopy|
|Authors:||WILSON J. N.; LEBOIS M.; QI LIQIANG; AMADOR CELDRAN PEDRO; BLEUEL D. L.; BRIZ J. A.; CARROLL R.; CATFORD W.; DE WITTE H.; DOHERTY D.; ELOIRDI RACHEL; GEORGIEV G.; GOTTARDO A.; GOASDUFF A.; HADYNSKE-KLEK K.; HAUSCHILD K.; HESS M.; INGEBERG V.; KONSTANTINOPOULOS T.; LJUNGVALL J.; LOPEZ-MARTENS A.; LORUSSO G.; LOZEVA R.; LUTTER R.; MARINI P.; MATEA I.; MATERNA T.; MATHIEU L.; OBERSTEDT A.; OBERSTEDT STEPHAN; PANEBIANCO S.; PODOLYAK Z.; PORTA A.; REGAN P. H,; REITER P.; REZYNKINA K.; ROSE S. J.; SAHIN E.; SEIDLITZ M.; SEROT O.; SHEARMAN R.; SIEBECK B.; SIEM S.; SMITH A. G.; TVETEN G. M.; VERNEY D.; WARR N.; ZEISER F.; ZIELINSKA M.|
|Citation:||EPJ Web of Conferences vol. 169 p. 00030|
|Type:||Articles in periodicals and books|
|Abstract:||Precise spectroscopic information on the fast neutron induced fission of the 238U(n,f) reaction was recently gained using a new technique which involved coupling of the Miniball high resolution γ-ray spectrometer and the LICORNE directional neutron source. The experiment allowed measurement of the isotopic fission yields for around 40 even-even nuclei at an incident neutron energy of around 2 MeV where yield data are very sparse. In addition spectroscopic information on very neutron-rich fission products was obtained. Results were compared to models, both the JEFF-3.1.1 data base and the GEF code, and large discrepancies for the S1 fission mode in the Sn/Mo isotope pair were discovered. This suggests that current models are overestimating the role played by spherical shell effects in fast neutron induced fission. In late 2017 and 2018 the nu-ball hybrid spectrometer will be constructed at the IPN Orsay to perform further experimental investigations with directional neutrons coupled to a powerful hybrid Ge/LaBr3 detector array. This will open up new possibilities for measurements of fission yields for fast-neutron-induced fission using the spectroscopic technique and will be complimentary to other methods being developed.|
|JRC Directorate:||Nuclear Safety and Security|
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