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The Decay of 207 Bi and the Energy Levels of 207 Pb

1954; IOP Publishing; Volume: 67; Issue: 6 Linguagem: Inglês

10.1088/0370-1298/67/6/308

1747-3829

J. R. V. Prescott,

Neutrino Physics Research

The electron-capture decay of 207Bi has been studied by scintillation counter coincidence techniques. Gamma-rays of energy 0.57, 1.07, 1.76 and 2.47 MeV were found in the relative abundances 1.57: 1: 0.16: 0.0072. `Prompt' coincidences were observed between the three former and the K-capture x-ray. The following percentages of the gamma-rays were prompt: 0.57: 19%; 1.07:6%; 1.76:7%. There is some evidence for a prompt gamma-ray of 1.46 MeV. The 1.76 and 1.07 MeV gamma-rays are in coincidence with the 0.57 MeV gamma-ray. The results are discussed in relation to the level scheme of 207Pb.