Th²³² (n,2n)Th²³¹ CROSS SECTION FROM THRESHOLD TO 20.4 MEV

1 March 1961

journal article
Published by Canadian Science Publishing in Canadian Journal of Chemistry

Vol. 39 (3) , 689-696
https://doi.org/10.1139/v61-083

Abstract

The excitation curve for the reaction Th²³² (n,2n) Th²³¹ has been measured by the activation method from the threshold energy, 6.34 Mev, to 20.4 Mev, relative to the known cross section for the S³² (n,p)P³² reaction. Monoenergetic neutrons were obtained from the D (d,n) He³ and T (d,n) He⁴ reactions employing a Tandem Van de Graaff accelerator. From threshold to 9.0 Mev, the (n,2n) cross section rises rapidly, reaching its maximum value of 1.88 ± 0.09 barns in the region of 9.5 to 11.0 Mev. Above 11.5 Mev the (n,2n) cross section decreases due to competition of the (n,3n) and (n,2nf) reactions and at 20.4 Mev it has a value of 0.225 ± 0.01₅ barns.

Keywords

CROSS SECTION

This publication has 7 references indexed in Scilit:

THE THERMAL NEUTRON CAPTURE CROSS SECTION AND THE RESONANCE ABSORPTION INTEGRAL OF Th²³⁰ (IONIUM)
Canadian Journal of Physics, 1958
$T (d, n) {He}^{4}$ Reaction
Physical Review B, 1957
Cross Sections for the $S^{32} (n, p) P^{32}$ and the $S^{34} (n, α) {Si}^{31}$ Reactions
Physical Review B, 1957
Neutrons from the D-D Reactions
Physical Review B, 1956
Monoenergetic Neutron Techniques in the 10- to 30-Mev Range
Reviews of Modern Physics, 1956
Tritium Gas Target for Neutron Production
Review of Scientific Instruments, 1956
Threshold for Photoneutron Reaction inTh232
Physical Review B, 1951

Th232 (n,2n)Th231 CROSS SECTION FROM THRESHOLD TO 20.4 MEV

Abstract

Keywords

Th²³² (n,2n)Th²³¹ CROSS SECTION FROM THRESHOLD TO 20.4 MEV