Determination of Excitation Function of Triton Emission Reaction on Aluminum from Threshold up to 30 MeV via Activation in Diverse Neutron Fields and Unfolding Code Calculations

1 October 1985

journal article
research article
Published by Taylor & Francis in Nuclear Science and Engineering

Vol. 91 (2) , 162-172
https://doi.org/10.13182/nse85-a27439

Abstract

Aluminum samples, together with sets of 12 flux monitor foils having different reaction thresholds, were irradiated in 6 different deuteron/beryllium neutron fields (Ed = 17.5 to 30 MeV). The shapes of the neutron spectra were determined by spectrum unfolding, using the known excitation functions of the monitor nuclides and their measured activities. In a second calculational step, the excitation function for the f(n, t)+(n, tn)] process on 27Al was obtained from the neutron flux distributions and the measured tritium activities. At both calculational stages the iterative code SAND-II and the generalized least-squares unfolding code were applied, the latter yielding additionally the error covariance matrix. The excitation function thus obtained has a maximum cross-section value of ∼8 mb at 25.5 MeV and compares well with the values obtained using monoenergetic neutrons in the region of 14 to 19 MeV.

Keywords

This publication has 14 references indexed in Scilit:

Triton-emission cross sections with 30 MeV d(Be) break-up neutrons
Nuclear Physics A, 1984
Excitation functions of ( $n$ , $t$ ) reactions on ${}^{27}{Al}$ , ${}^{59}{Co}$ , and ${}^{93}{Nb}$
Physical Review C, 1982
Statistical model analysis of cross sections of ( $n, t$ ) and ( $n$ , ${}^{3}{He}$ ) reactions induced by 14.6 MeV neutrons on target nuclei with $A = 27 to 59$
Physical Review C, 1980
Triton emission in the interactions of fast neutrons with nuclei
Nuclear Physics A, 1978
Investigation of (n,t) reactions at 14.6 MeV and an analysis of some systematic trends in the cross-section data
Nuclear Physics A, 1976
Investigations of (n, t) cross sections at 14·7 MeV
Journal of Inorganic and Nuclear Chemistry, 1975
Cross sections for ( $n, xn$ ) reactions between 7.5 and 28 MeV
Physical Review C, 1975
Fast neutron induced [(n,t) + (n,n′t)] reaction cross-sections in the medium and heavy mass regions
Journal of Inorganic and Nuclear Chemistry, 1974
A systematic investigation of (n,t) reactions at 14–15 MeV on medium and heavy mass nuclei
Journal of Inorganic and Nuclear Chemistry, 1973
EXCITATION CURVES FOR THE (n, 2n), (n, p), AND (n, nα) REACTIONS OF ⁶⁵Cu
Canadian Journal of Physics, 1966