METHODS FOR SAMPLING AND
INORGANIC ANALYSIS OF COAL
U.S. Geological Survey
Bulletin 1823
Edited by D.W. Golightly and F.O. Simon
Table 10. Interferences in INAA due to neutron-induced fission of 235U (in m g of the elements (apparent) per m g of U)
| Isotope | Fission Yield | (h
,g ) Cross Section (barns) |
I (calc.)¦ | I (exp.)* | ||
| 95Zr | 6.5 | 0.08 | 7.5 | 11.5 | ± | 0.3 |
| 99Mo | 6.1 | 0.51 | 0.85 | 1.01 | ± | 0.13 |
| 140La | 6.3 | 8.9 | 0.020t | |||
| 14lCe | 5.9 | 0.6 | 0.27 | 0.29 | ± | 0.01 |
| 147Nd | 2.26 | 2 | 0.17 | 0.22 | ± | 0.01 |
| 153Sm | 0.16 | 210 | 0.00008 | |||
| *Error estimates are 70
percent confidence limits on the mean of four
determinations. t 6 days following irradiation. ¦ Calculation assumes that the cross section for fission of 235U is equal to 580 barns. |
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