The decay of 214Pb and other 226Ra daughters

214Po: A ?-? and ??(?) Coincidence study

“…5, was about 300 h. The system had a detection limit of ~0.0002% for 7 rays with energies above 2 MeV. The 7-ray intensities for lines with energies above 3 MeV are given in Table 2; previous results [5,6] are listed for comparison. Features A and B of Fig.…”

“…Although we have not observed any of these transitions in our experiments, we have been able to extract upper limits to the intensities for most of them. Coincidence measurements [5] withdrawn (see Table 1) ** y ray reported in I-5] unless otherwise stated *** The type of experiment is indicated in parentheses; y-singles; 7 y-coincidence a From Ref. 8 From Ref.…”

“…Energies and intensities of about 200 ~) transitions and placements of about 120 y rays have been gleaned from past experiments. Recent high resolution y-ray studies have provided vital information on selected transitions [3][4][5][6][7][8][9]. In spite of this effort, about 80 y rays with intensities < 0.2% were still not placed in the level scheme, according to the review by Toth [2] and many details of the scheme required an independent confirmation.…”

Evaluation of decay data of radium-226 and its daughters

“…Some measurements of X-ray data were be found in the literature for Ra-226 [6,17,29], Pb-214 [4,6] and Bi-214 [6]. In the case of Ra-226 (table 5), the recommended data and de Pinho values [29] are significantly greater than those measured by Delgado [17] and Schötzig [6].…”

“…The recommended values for the relative gamma-ray emission intensities are the weighted means of the data sets found in the literature dating from 1969 to 2004 [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], calculated using the LWEIGHT computer code [19]. When necessary the uncertainties quoted by the authors were increased to achieve The transition probabilities for all gamma-rays were calculated using the absolute gamma-ray emission intensities and the relevant internal conversion coefficients (ICCs).…”