Thermal-neutron-capture γ rays from the reaction Pb207(n,γ)Pb208
The thermal-neutron-capture γ-ray spectra from natural Pb and enriched Pb207 have been studied with a 20-cm3 Ge(Li) detector. A careful comparison of these spectra reveals the existence of two weak γ-ray cascades (intensity ≅ 10-3 times the intensity of the primary transition to the Pb208 ground sta...
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| Autores principales: | , , |
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| Formato: | JOUR |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_05562813_v5_n1_p178_Mariscotti |
| Aporte de: |
| Sumario: | The thermal-neutron-capture γ-ray spectra from natural Pb and enriched Pb207 have been studied with a 20-cm3 Ge(Li) detector. A careful comparison of these spectra reveals the existence of two weak γ-ray cascades (intensity ≅ 10-3 times the intensity of the primary transition to the Pb208 ground state) from the neutron-capture state to the Pb208 ground state. These cascades have energies 4753.7-2614.0 keV and 3283.3-4086.0 keV and pass through the first excited 3- state at 2614.0 keV and a 2+ state at 4086.0 keV, respectively. The neutron separation energy of Pb208 was measured to be 7367.7 ± 0.7 keV. © 1972 The American Physical Society. |
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