Measurement of the 236U(n,f) Cross Section in the Neutron Energy Range from 0.5 eV up to 25 keV

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

Measurement of the 236U(n,f) Cross Section in the Neutron Energy Range from 0.5 eV up to 25 keV

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

Research output › peer-review

Abstract

The 236U(n,f) cross section has been measured in the energy range from 0.5 eV to 25 keV at the Geel Electron Linear Accelerator neutron time-of-flight facility of the Institute for Reference Materials and Measurements in Geel, Belgium. A highly enriched 236U sample was mounted back-to-back with a 10B sample in the center of a Frisch-gridded ionization chamber, hence realizing a 2pi detection geometry. A 235U(n,f) cross-section control measurement was performed in the same experimental conditions. Special attention has been given to the fission resonance integral I_f and to the strongest resonance at 5.45 eV, for which a resonance analysis has been performed yielding Gamma_f = 1.7 µeV. Both values are highly overestimated in the literature.

Original language	English
Pages (from-to)	200-206
Journal	Nuclear Science and Engineering
Volume	160
Issue number	2
State	Published - 1 Oct 2008

Cite this

@article{198c4dfa474441778ae83e33bb205f15,

title = "Measurement of the 236U(n,f) Cross Section in the Neutron Energy Range from 0.5 eV up to 25 keV",

abstract = "The 236U(n,f) cross section has been measured in the energy range from 0.5 eV to 25 keV at the Geel Electron Linear Accelerator neutron time-of-flight facility of the Institute for Reference Materials and Measurements in Geel, Belgium. A highly enriched 236U sample was mounted back-to-back with a 10B sample in the center of a Frisch-gridded ionization chamber, hence realizing a 2pi detection geometry. A 235U(n,f) cross-section control measurement was performed in the same experimental conditions. Special attention has been given to the fission resonance integral I\_f and to the strongest resonance at 5.45 eV, for which a resonance analysis has been performed yielding Gamma\_f = 1.7 µeV. Both values are highly overestimated in the literature.",

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 \{Van Gils\}, Jaak and Olivier Serot and Jan Wagemans",

note = "Score = 10",

year = "2008",

month = oct,

day = "1",

language = "English",

volume = "160",

pages = "200--206",

journal = "Nuclear Science and Engineering",

issn = "0029-5639",

publisher = "Taylor and Francis Ltd.",

number = "2",

}

TY - JOUR

T1 - Measurement of the 236U(n,f) Cross Section in the Neutron Energy Range from 0.5 eV up to 25 keV

AU - Wagemans, Cyriel

AU - De Smet, Liesbeth

AU - Vermote, Sofie

AU - Heyse, Jan

AU - Van Gils, Jaak

AU - Serot, Olivier

A2 - Wagemans, Jan

N1 - Score = 10

PY - 2008/10/1

Y1 - 2008/10/1

N2 - The 236U(n,f) cross section has been measured in the energy range from 0.5 eV to 25 keV at the Geel Electron Linear Accelerator neutron time-of-flight facility of the Institute for Reference Materials and Measurements in Geel, Belgium. A highly enriched 236U sample was mounted back-to-back with a 10B sample in the center of a Frisch-gridded ionization chamber, hence realizing a 2pi detection geometry. A 235U(n,f) cross-section control measurement was performed in the same experimental conditions. Special attention has been given to the fission resonance integral I_f and to the strongest resonance at 5.45 eV, for which a resonance analysis has been performed yielding Gamma_f = 1.7 µeV. Both values are highly overestimated in the literature.

AB - The 236U(n,f) cross section has been measured in the energy range from 0.5 eV to 25 keV at the Geel Electron Linear Accelerator neutron time-of-flight facility of the Institute for Reference Materials and Measurements in Geel, Belgium. A highly enriched 236U sample was mounted back-to-back with a 10B sample in the center of a Frisch-gridded ionization chamber, hence realizing a 2pi detection geometry. A 235U(n,f) cross-section control measurement was performed in the same experimental conditions. Special attention has been given to the fission resonance integral I_f and to the strongest resonance at 5.45 eV, for which a resonance analysis has been performed yielding Gamma_f = 1.7 µeV. Both values are highly overestimated in the literature.

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

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_92931

UR - http://knowledgecentre.sckcen.be/so2/bibref/5359

M3 - Article

SN - 0029-5639

VL - 160

SP - 200

EP - 206

JO - Nuclear Science and Engineering

JF - Nuclear Science and Engineering

IS - 2

ER -