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Measurement of the neutron induced fission of 245Cm in the resolved resonance region and its resonance analysis

Olivier Serot, Cyrillus Wagemans UGent, Sofie Vermote UGent and Jaak Van Gils (2011) JOURNAL OF THE KOREAN PHYSICAL SOCIETY. 59(2). p.1896-1899
abstract
In order to improve the prediction of heavy actinide concentration in reactor fuel elements and to study the reduction of the long-term nuclear waste radiotoxicity by using transmutation, cross sections for neutron induced reactions are highly required by nuclear industry for many minor actinides. In this context, a new measurement of the Cm-245(n,f) cross section has been performed at the GELINA neutron facility of the Institute for Reference Materials and Measurements (IRMM) in Gee], Belgium. This measurement was motivated by the fact that in the thermal region a strong dispersion between measurements is observed and in the resolved resonance region, only a few old measurements exist with in some cases a poor energy resolution. The energy of the neutrons is determined applying the time of flight method using a flight path length of about 9 m. In the present work, the incident neutron energy covers the resolved and unresolved resonance regions up to a few keV. A highly enriched Cm-245 sample (98.48%) was mounted back-to-back with a B-10 sample in the centre of a vacuum chamber together with two surface barrier detectors positioned outside the neutron beam. One detector measured the B-10(n,alpha)Li-7 reaction products for the neutron flux determination, while the second one registered the Cm-245(n,f) fragments. In this way, the neutron flux can be determined simultaneously with the fission fragments. A control measurement has been performed replacing the Cm-245 sample with a U-235 sample in order to check that the well-known U-235(n,f) cross section can be reproduced. In comparison with previous Cm-245 fission cross section measurements, our results show a nice improvement of the energy resolution, in particular below 20 eV. A new set of resonance parameters is determined using the evaluation code CONRAD which was recently developed by CEA-Cadarache.
Please use this url to cite or link to this publication:
author
organization
alternative title
Measurement of the neutron induced fission of Cm-245 in the resolved resonance region and its resonance analysis
year
type
journalArticle (original)
publication status
published
subject
keyword
fission, neutron induced cross section, 245Curium, resonance
journal title
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
J. Korean Phys. Soc.
volume
59
issue
2
pages
1896 - 1899
Web of Science type
Article
Web of Science id
000294080700107
JCR category
PHYSICS, MULTIDISCIPLINARY
JCR impact factor
0.447 (2011)
JCR rank
64/82 (2011)
JCR quartile
4 (2011)
ISSN
0374-4884
DOI
10.3938/jkps.59.1896
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1891849
handle
http://hdl.handle.net/1854/LU-1891849
date created
2011-08-23 16:12:06
date last changed
2016-12-19 15:42:00
@article{1891849,
  abstract     = {In order to improve the prediction of heavy actinide concentration in reactor fuel elements and to study the reduction of the long-term nuclear waste radiotoxicity by using transmutation, cross sections for neutron induced reactions are highly required by nuclear industry for many minor actinides. In this context, a new measurement of the Cm-245(n,f) cross section has been performed at the GELINA neutron facility of the Institute for Reference Materials and Measurements (IRMM) in Gee], Belgium. This measurement was motivated by the fact that in the thermal region a strong dispersion between measurements is observed and in the resolved resonance region, only a few old measurements exist with in some cases a poor energy resolution. The energy of the neutrons is determined applying the time of flight method using a flight path length of about 9 m. In the present work, the incident neutron energy covers the resolved and unresolved resonance regions up to a few keV. A highly enriched Cm-245 sample (98.48\%) was mounted back-to-back with a B-10 sample in the centre of a vacuum chamber together with two surface barrier detectors positioned outside the neutron beam. One detector measured the B-10(n,alpha)Li-7 reaction products for the neutron flux determination, while the second one registered the Cm-245(n,f) fragments. In this way, the neutron flux can be determined simultaneously with the fission fragments. A control measurement has been performed replacing the Cm-245 sample with a U-235 sample in order to check that the well-known U-235(n,f) cross section can be reproduced. In comparison with previous Cm-245 fission cross section measurements, our results show a nice improvement of the energy resolution, in particular below 20 eV. A new set of resonance parameters is determined using the evaluation code CONRAD which was recently developed by CEA-Cadarache.},
  author       = {Serot, Olivier and Wagemans, Cyrillus and Vermote, Sofie and Van Gils, Jaak},
  issn         = {0374-4884},
  journal      = {JOURNAL OF THE KOREAN PHYSICAL SOCIETY},
  keyword      = {fission,neutron induced cross section,245Curium,resonance},
  language     = {eng},
  number       = {2},
  pages        = {1896--1899},
  title        = {Measurement of the neutron induced fission of 245Cm in the resolved resonance region and its resonance analysis},
  url          = {http://dx.doi.org/10.3938/jkps.59.1896},
  volume       = {59},
  year         = {2011},
}

Chicago
Serot, Olivier, Cyrillus Wagemans, Sofie Vermote, and Jaak Van Gils. 2011. “Measurement of the Neutron Induced Fission of 245Cm in the Resolved Resonance Region and Its Resonance Analysis.” Journal of the Korean Physical Society 59 (2): 1896–1899.
APA
Serot, O., Wagemans, C., Vermote, S., & Van Gils, J. (2011). Measurement of the neutron induced fission of 245Cm in the resolved resonance region and its resonance analysis. JOURNAL OF THE KOREAN PHYSICAL SOCIETY, 59(2), 1896–1899.
Vancouver
1.
Serot O, Wagemans C, Vermote S, Van Gils J. Measurement of the neutron induced fission of 245Cm in the resolved resonance region and its resonance analysis. JOURNAL OF THE KOREAN PHYSICAL SOCIETY. 2011;59(2):1896–9.
MLA
Serot, Olivier, Cyrillus Wagemans, Sofie Vermote, et al. “Measurement of the Neutron Induced Fission of 245Cm in the Resolved Resonance Region and Its Resonance Analysis.” JOURNAL OF THE KOREAN PHYSICAL SOCIETY 59.2 (2011): 1896–1899. Print.