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Update of the evaluation of the cross sections for the neutron-dosimetry reactions {sup 19}F(n,2n){sup 18}F and {sup 93}Nb(n,2n){sup 92m}Nb

Technical Report:

Abstract

The excitation functions for the reactions {sup 19}F(n,2n){sup 18}F and {sup 93}Nb(n,2n){sup 92m}Nb, which are included in the International Reactor Dosimetry File (IRDF-90), were re-evaluated taking into account very recent experimental data. In the case of the reaction {sup 19}F(n,2n){sup 18}F the new measurements served to extend the neutron energy range beyond 20 MeV; for the {sup 93}Nb(n,2n){sup 92m}Nb reaction the new information concerning the energy region just above the threshold (9.0 - 10.6 MeV) substantially modified the results of the evaluation and thus the recommended cross sections in this energy region. The cross sections and their uncertainties were evaluated in energy groups with widths of 0.2 MeV to 2.0 MeV, and relative correlation matrices of the evaluated cross sections at the different energies were calculated. The results of the evaluation are compared with those given in the IRDF-90 and, in the case of {sup 93}Nb(n,2n){sup 92m}Nb, with a model calculation carried out by Strohmaier. The results of this work are intended to replace the corresponding data given in Physics Data 13-5 and the recommended cross sections for these two reactions in the IRDF-90. (author). 23 refs, figs and tabs.
Authors:
Wagner, M [1] 
  1. Vienna Univ. (Austria). Inst. fuer Radiumforschung und Kernphysik
Publication Date:
Oct 01, 1991
Product Type:
Technical Report
Report Number:
INDC(AUS)-014/L
Reference Number:
SCA: 663430; PA: AIX-23:015566; SN: 92000647161
Resource Relation:
Other Information: PBD: Oct 1991
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; FLUORINE 19 TARGET; NEUTRON REACTIONS; CROSS SECTIONS; NIOBIUM 93 TARGET; DATA COVARIANCES; EVALUATED DATA; EXCITATION FUNCTIONS; FLUORINE 18; MEV RANGE 01-10; MEV RANGE 10-100; NEUTRONS; NIOBIUM 92; 663430; NUCLEON-INDUCED REACTIONS AND SCATTERING
OSTI ID:
10113390
Research Organizations:
International Atomic Energy Agency, Vienna (Austria). International Nuclear Data Committee
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ON: DE92615323; TRN: XA9230366015566
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
INIS
Size:
32 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Wagner, M. Update of the evaluation of the cross sections for the neutron-dosimetry reactions {sup 19}F(n,2n){sup 18}F and {sup 93}Nb(n,2n){sup 92m}Nb. IAEA: N. p., 1991. Web.
Wagner, M. Update of the evaluation of the cross sections for the neutron-dosimetry reactions {sup 19}F(n,2n){sup 18}F and {sup 93}Nb(n,2n){sup 92m}Nb. IAEA.
Wagner, M. 1991. "Update of the evaluation of the cross sections for the neutron-dosimetry reactions {sup 19}F(n,2n){sup 18}F and {sup 93}Nb(n,2n){sup 92m}Nb." IAEA.
@misc{etde_10113390,
title = {Update of the evaluation of the cross sections for the neutron-dosimetry reactions {sup 19}F(n,2n){sup 18}F and {sup 93}Nb(n,2n){sup 92m}Nb}
author = {Wagner, M}
abstractNote = {The excitation functions for the reactions {sup 19}F(n,2n){sup 18}F and {sup 93}Nb(n,2n){sup 92m}Nb, which are included in the International Reactor Dosimetry File (IRDF-90), were re-evaluated taking into account very recent experimental data. In the case of the reaction {sup 19}F(n,2n){sup 18}F the new measurements served to extend the neutron energy range beyond 20 MeV; for the {sup 93}Nb(n,2n){sup 92m}Nb reaction the new information concerning the energy region just above the threshold (9.0 - 10.6 MeV) substantially modified the results of the evaluation and thus the recommended cross sections in this energy region. The cross sections and their uncertainties were evaluated in energy groups with widths of 0.2 MeV to 2.0 MeV, and relative correlation matrices of the evaluated cross sections at the different energies were calculated. The results of the evaluation are compared with those given in the IRDF-90 and, in the case of {sup 93}Nb(n,2n){sup 92m}Nb, with a model calculation carried out by Strohmaier. The results of this work are intended to replace the corresponding data given in Physics Data 13-5 and the recommended cross sections for these two reactions in the IRDF-90. (author). 23 refs, figs and tabs.}
place = {IAEA}
year = {1991}
month = {Oct}
}