American Nuclear Society

Home / Store / Journals / Electronic Articles / Nuclear Science and Engineering / Volume 91 / Number 2

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

R. Wölfle, S. Sudár, S. M. Qaim

Nuclear Science and Engineering

Volume 91 / Number 2 / October 1985 / Pages 162-172


Member Price:$27.00
Member Savings:$3.00

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.

Questions or comments about the site? Contact the ANS Webmaster.