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arXiv · 1707.09375

The $^{12}$C(n, 2n)$^{11}$C cross section from threshold to 26.5 MeV

M. Yuly·T. Eckert·G. Hartshaw·S. J. Padalino·D. N. Polsin·M. Russ·A. T. Simone·C. R. Brune·T. N. Massey·C. E. Parker·R. Fitzgerald·T. C. Sangster·S. P. Regan
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Abstract

The $^{12}$C(n, 2n)$^{11}$C cross section was measured from just below threshold to 26.5 MeV using the Pelletron accelerator at Ohio University. Monoenergetic neutrons, produced via the $^3$H(d,n)$^4$He reaction, were allowed to strike targets of polyethylene and graphite. Activation of both targets was measured by counting positron annihilations resulting from the $\beta^+$ decay of $^{11}$C. Annihilation gamma rays were detected, both in coincidence and singly, using back-to-back NaI detectors. The incident neutron flux was determined indirectly via $^{1}$H(n,p) protons elastically scattered from the polyethylene target. Previous measurements fall into upper and lower bands, the results of the present measurement are consistent with the upper band.

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M. Yuly, T. Eckert, G. Hartshaw, S. J. Padalino, D. N. Polsin, M. Russ, A. T. Simone, C. R. Brune, T. N. Massey, C. E. Parker, R. Fitzgerald, T. C. Sangster, S. P. Regan. 2017-07-28. The $^{12}$C(n, 2n)$^{11}$C cross section from threshold to 26.5 MeV. https://doi.org/10.1103/physrevc.97.024613

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