Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

The 12C(n,2n)11C Cross Section from Threshold to 26.5 MeV



Ryan P. Fitzgerald, 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, T. C. Sangster, S P. Regan


The 12C(n, 2n)11C cross section was measured from just below threshold to 26.5 MeV using the pelletron accelerator at Ohio University. Monoenergetic neutrons, produced via the 3H(d,n)4He reaction, were allowed to strike targets of polyethylene and graphite. Activation of both targets was measured by counting positron annihilations resulting from the β+ decay of 11C. Annihilation gamma rays were detected, both in coincidence and singly, using back-to-back NaI detectors. The incident neutron flux was determined indirectly via 1H(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.
Physical Review C (Nuclear Physics)


12C, 11C, cross section, neutron, fusion


Fitzgerald, R. , Yuly, M. , Eckert, T. , Hartshaw, G. , Padalino, S. , Polsin, D. , Russ, M. , Simone, A. , Brune, C. , Massey, T. , Parker, C. , Sangster, T. and Regan, S. (2018), The 12C(n,2n)11C Cross Section from Threshold to 26.5 MeV, Physical Review C (Nuclear Physics), [online], (Accessed June 25, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created February 20, 2018, Updated November 10, 2018