Measurement of the 236U(n,f) cross section as a function of the neutron energy

Cyriel Wagemans; Liesbeth De Smet; Sofie Vermote; Jan Heyse; Olivier Serot; Jaak Van Gils; Jan Wagemans

Measurement of the 236U(n,f) cross section as a function of the neutron energy

Cyriel Wagemans, Liesbeth De Smet, Sofie Vermote, Jan Heyse, Olivier Serot, Jaak Van Gils, Jan Wagemans

Research output › peer-review

Abstract

The 236U(n,f) cross section has been measured in the neutron energy region from 0.5 eV to 25 keV at the GELINA neutron facility of the IRMM in Geel, Belgium. A highly enriched 236U sample was mounted back-to-back with a 10B sample in the centre of a Frisch-gridded ionisation chamber; a control measurement was performed with a 235U sample in the same configuration. Besides a dominant resonance at 5.45 eV, for which a resonance analysis was performed, the next resonance (cluster) only occurs at about 1.3 keV. It is demonstrated that the fission resonance integral and the thermal fission cross section adopted in all commonly used evaluated data libraries are too large by two orders of magnitude.

Original language	English
Title of host publication	Proceedings of the International Conference on Nuclear Data for Science and Technology, April 22-27, 2007, Nice, France, editors O.Bersillon, F.Gunsing, E.Bauge, R.Jacqmin, and S.Leray
Place of Publication	Les Ulis, France
Pages	487-490
Volume	2
State	Published - 21 May 2008
Event	2007 International Conference on Nuclear Data for Science and Technology - CEA/OECD NEA, Nice Duration: 22 Apr 2007 → 27 Apr 2007

Conference

Conference	2007 International Conference on Nuclear Data for Science and Technology
Country/Territory	France
City	Nice
Period	2007-04-22 → 2007-04-27

Cite this

Wagemans, C., De Smet, L., Vermote, S., Heyse, J., Serot, O., Van Gils, J., & Wagemans, J. (2008). Measurement of the 236U(n,f) cross section as a function of the neutron energy. In Proceedings of the International Conference on Nuclear Data for Science and Technology, April 22-27, 2007, Nice, France, editors O.Bersillon, F.Gunsing, E.Bauge, R.Jacqmin, and S.Leray (Vol. 2, pp. 487-490).

Wagemans, Cyriel ; De Smet, Liesbeth ; Vermote, Sofie et al. / Measurement of the 236U(n,f) cross section as a function of the neutron energy. Proceedings of the International Conference on Nuclear Data for Science and Technology, April 22-27, 2007, Nice, France, editors O.Bersillon, F.Gunsing, E.Bauge, R.Jacqmin, and S.Leray. Vol. 2 Les Ulis, France, 2008. pp. 487-490

@inproceedings{68734b7acf8a4438a9b977b3c19e9666,

title = "Measurement of the 236U(n,f) cross section as a function of the neutron energy",

abstract = "The 236U(n,f) cross section has been measured in the neutron energy region from 0.5 eV to 25 keV at the GELINA neutron facility of the IRMM in Geel, Belgium. A highly enriched 236U sample was mounted back-to-back with a 10B sample in the centre of a Frisch-gridded ionisation chamber; a control measurement was performed with a 235U sample in the same configuration. Besides a dominant resonance at 5.45 eV, for which a resonance analysis was performed, the next resonance (cluster) only occurs at about 1.3 keV. It is demonstrated that the fission resonance integral and the thermal fission cross section adopted in all commonly used evaluated data libraries are too large by two orders of magnitude.",

keywords = "nuclear reactions, neutron, cross section, measurement, fission, (n, f), 236U, time-of-flight, resonance, IRMM, GELINA, 235U, 10B, En=0.5eV-25keV",

author = "Cyriel Wagemans and {De Smet}, Liesbeth and Sofie Vermote and Jan Heyse and Olivier Serot and {Van Gils}, Jaak and Jan Wagemans",

note = "Score = 1; 2007 International Conference on Nuclear Data for Science and Technology ; Conference date: 22-04-2007 Through 27-04-2007",

year = "2008",

month = may,

day = "21",

language = "English",

isbn = "978-2-7598-0090-2",

volume = "2",

pages = "487--490",

booktitle = "Proceedings of the International Conference on Nuclear Data for Science and Technology, April 22-27, 2007, Nice, France, editors O.Bersillon, F.Gunsing, E.Bauge, R.Jacqmin, and S.Leray",

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Wagemans, C, De Smet, L, Vermote, S, Heyse, J, Serot, O, Van Gils, J & Wagemans, J 2008, Measurement of the 236U(n,f) cross section as a function of the neutron energy. in Proceedings of the International Conference on Nuclear Data for Science and Technology, April 22-27, 2007, Nice, France, editors O.Bersillon, F.Gunsing, E.Bauge, R.Jacqmin, and S.Leray. vol. 2, Les Ulis, France, pp. 487-490, 2007 International Conference on Nuclear Data for Science and Technology, Nice, France, 2007-04-22.

Measurement of the 236U(n,f) cross section as a function of the neutron energy. / Wagemans, Cyriel; De Smet, Liesbeth; Vermote, Sofie et al.
Proceedings of the International Conference on Nuclear Data for Science and Technology, April 22-27, 2007, Nice, France, editors O.Bersillon, F.Gunsing, E.Bauge, R.Jacqmin, and S.Leray. Vol. 2 Les Ulis, France, 2008. p. 487-490.

Research output › peer-review

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AU - Wagemans, Cyriel

AU - De Smet, Liesbeth

AU - Vermote, Sofie

AU - Heyse, Jan

AU - Serot, Olivier

AU - Van Gils, Jaak

A2 - Wagemans, Jan

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N2 - The 236U(n,f) cross section has been measured in the neutron energy region from 0.5 eV to 25 keV at the GELINA neutron facility of the IRMM in Geel, Belgium. A highly enriched 236U sample was mounted back-to-back with a 10B sample in the centre of a Frisch-gridded ionisation chamber; a control measurement was performed with a 235U sample in the same configuration. Besides a dominant resonance at 5.45 eV, for which a resonance analysis was performed, the next resonance (cluster) only occurs at about 1.3 keV. It is demonstrated that the fission resonance integral and the thermal fission cross section adopted in all commonly used evaluated data libraries are too large by two orders of magnitude.

AB - The 236U(n,f) cross section has been measured in the neutron energy region from 0.5 eV to 25 keV at the GELINA neutron facility of the IRMM in Geel, Belgium. A highly enriched 236U sample was mounted back-to-back with a 10B sample in the centre of a Frisch-gridded ionisation chamber; a control measurement was performed with a 235U sample in the same configuration. Besides a dominant resonance at 5.45 eV, for which a resonance analysis was performed, the next resonance (cluster) only occurs at about 1.3 keV. It is demonstrated that the fission resonance integral and the thermal fission cross section adopted in all commonly used evaluated data libraries are too large by two orders of magnitude.

KW - nuclear reactions

KW - neutron

KW - cross section

KW - measurement

KW - fission

KW - (n

KW - f)

KW - 236U

KW - time-of-flight

KW - resonance

KW - IRMM

KW - GELINA

KW - 235U

KW - 10B

KW - En=0.5eV-25keV

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UR - http://knowledgecentre.sckcen.be/so2/bibref/5362

M3 - In-proceedings paper

SN - 978-2-7598-0090-2

VL - 2

SP - 487

EP - 490

BT - Proceedings of the International Conference on Nuclear Data for Science and Technology, April 22-27, 2007, Nice, France, editors O.Bersillon, F.Gunsing, E.Bauge, R.Jacqmin, and S.Leray

CY - Les Ulis, France

T2 - 2007 International Conference on Nuclear Data for Science and Technology

Y2 - 22 April 2007 through 27 April 2007

ER -

Wagemans C, De Smet L, Vermote S, Heyse J, Serot O, Van Gils J et al. Measurement of the 236U(n,f) cross section as a function of the neutron energy. In Proceedings of the International Conference on Nuclear Data for Science and Technology, April 22-27, 2007, Nice, France, editors O.Bersillon, F.Gunsing, E.Bauge, R.Jacqmin, and S.Leray. Vol. 2. Les Ulis, France. 2008. p. 487-490