Some neutron activation cross-sections at 1478 MeV

Fast neutron activation cross-sections have been measured at 14·78 MeV relative to the ⁵⁶Fe(n,p)⁵⁶Mn cross-section. The following cross-sections (in millibarns) have been determined: ¹⁴N(n, 2n)¹³N 7·45 ± 0·4, ¹⁹F(n, 2n)¹⁸F 47·9 ± 1·4, ⁶⁵Cu(n, 2n)⁶⁴Cu 1043 ± 37·7, ¹⁶⁰Gd(n, 2n)¹⁵⁹Gd 1456 ± 44, ¹⁹⁸Pt(n, 2n)¹⁹⁷Pt 2091 ±113, ²⁷Al(n, α)²⁴Na 115·5 ± 3, ³⁰Si(n, α)³⁰Mg 90 ± 11, ³⁴S(n, α) ³¹Si 194 ± 5·9, ⁵¹V(n, α)⁴⁸Sc 19·5 ± 1·2, ⁵⁹Co(n, α)⁵⁶Mn 32·3 ± 1·1, ²⁴Mg(n,p)²⁴Na 179·7 ± 5, ²⁷Al(n,p)²⁷Mg 68 ± 2·3, ²⁸Si(n,p)²⁸Al 265 ± 7·5, ²⁹Si(n,p)²⁹Al 131 ± 13·6, ³¹P(n,p)³¹Si 85·6 ± 2·6 ³²S(n, p)³²P 219 ± 7·1, ⁵¹V(n,p)⁵¹Ti 31 ± 1·3, ⁶⁵Cu(n,p)⁶⁵Ni 26 ± 1. The samples were in the form of thin foils and the activities produced after irradiation were determined using absolute 4πβ-γ coincidence counting techniques. The Value of the ⁵⁶Fe(n, p)⁵⁶Mn cross-section used as the standard was 109·8 ± 2·9 mb. The results are compared with those of other authors and show that by considering the ratio of individual cross-sections it is possible to determine if a single cross-section is grossly in error or not.