| Autor: |
P. Richards, T.H. Ku, D.E. Alburger |
| Rok vydání: |
1980 |
| Předmět: |
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| Zdroj: |
Physical Review C. 21:705-711 |
| ISSN: |
0556-2813 |
| DOI: |
10.1103/physrevc.21.705 |
| Popis: |
The emission of ..beta.. rays from 6.02-h /sup 99/Tc/sup m/ has been detected with an intermediate-image magnetic spectrometer. ..beta..-ray components with end-point energies of 434.8 +- 2.6 keV (..beta../sub 0/) to the /sup 99/Ru ground state and 346.7 +- 2.0 keV (..beta../sub 1/) to the 90-keV state were found with intensities per decay of (1.0 +- 0.3) x 10/sup -5/ for ..beta../sub 0/ and (2.6 +- 0.5) x 10/sup -5/ for ..beta../sub 1/. In the Kurie plot analysis the unique first-forbidden ''..cap alpha..'' shape was assumed for ..beta../sub 0/ and an allowed shape was assumed for ..beta../sub 1/. Values of log f/sub 1/t=9.39 +- 0.11 for ..beta../sub 0/ and log f/sub 0/t=8.66 +- 0.08 for ..beta../sub 1/ were derived. ..gamma.. rays of 322, 233, and 140 keV were observed in a calibrated Ge(Li) detector with relative source intensities of I/sub 322/:I/sub 233/:I/sub 140/= (1.13 +- 0.09) x 10/sup -6/:(0.95 +- 0.17) x 10/sup -7/:1.000. The total ..beta..-ray branching of 3.7 x 10/sup -5/ results in a negligible correction to dosage calculations in the use of /sup 99/Tc/sup m/ for diagnostic nuclear medicine. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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