Nuclear Data Evaluation for 217Po

Authors: Sherif S. Nafee, Amir K. Al-Ramady, Salem S. Shaheen

Abstract:

Evaluated nuclear decay data for the 217Po nuclide is presented in the present work. These data include recommended values for the half-life T1/2, α-, β-- and γ-ray emission energies and probabilities. Decay data from 221Rn α and 217Bi β—decays are presented. Q(α) has been updated based on the recent published work of the Atomic Mass Evaluation AME2012. In addition, the logft values were calculated using the Logft program from the ENSDF evaluation package. Moreover, the total internal conversion electrons and the K-shell to L-shell and L-shell to M-shell and to N-shell conversion electrons ratios K/L, L/M and L/N have been calculated using Bricc program. Meanwhile, recommendation values or the multi-polarities have been assigned based on recently measurement yield a better intensity balance at the 254 keV and 264 keV gamma transitions.

Keywords: Atomic Mass Evaluation, Nuclear Data Evaluation, Total Electron Conversion Electrons.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1100000

References:

[1] A. Akovali, “Nuclear Data Sheets for A = 217,” Nucl.Data Sheets, vol. 100, pp. 141, 2003.
[2] C. F. Liang, P. Paris, R. K. Sheline, “Level Structure of 217Po and the Spin of the Previously Proposed 213Pb Ground State,” Phys.Rev. C, vol. 56, pp. 2324, 1997.
[3] Izv. Akad. Nauk SSSR, “The Decay of 221Rn,” Ser.Fiz. vol. 41, pp. 1635, 1977.
[4] A.I.Morales, G.Benzoni, A.Gottardo, J.J.Valiente-Dobon, N.Blasi, A.Bracco, et al., “β-decay studies of neutron-rich Tl, Pb, and Bi isotopes,” Phys. Rev. C, vol. 89, pp. 014324, 2014.
[5] J.Kurpeta, A.Plochocki, A.N.Andreyev, J.Aysto, A.De Smet, H.De Witte, A.-H.Evensen, et al., “The decay of the new neutron-rich isotope 217Bi,” Eur.Phys.J. A, vol. 18, pp. 5, 2003.
[6] S. Pietrietal., “Recent results in fragmentation isomer spectroscopy with rising,” Nucl. Instrum.Methods B, vol. 261, pp. 179, 2007.
[7] J. Lettry, R. Catherall, P. Drumm, P. Van Duppen, A.H.M. Evensen, G.J. Focker, A. Jokinen, O.C. Jonsson, E. Kugler, H. Ravn, ISOLDE Collaboration, Nucl. Instrum. Methods B, vol. 126, pp. 130, 1997.
[8] N. A. Golovkov, K. Ya. Gromov, Yu. N. Denisov, et al., OIYaI R12- 3340, Dubna, 1967.
[9] T. Kibedi, T. W. Burrows, M. B. Trzhaskovskaya, P. M. Davidson, C. W. Nestor, Jr. “Evaluation of theoretical conversion coefficients using BrIcc,” Nucl. Instrum. Methods Phys. Res. A, vol. 589, pp. 202 2008.
[10] M. Wang, G. Audi, A. H. Wapstra, F. G. Kondev, M. MacCormick, X.Xu, B. Pfeiffer, “The AME2012 atomic mass evaluation (II). Tables, graphs and references,” Chin.Phys.C, vol. 36, pp. 1603, 2012.
[11] C. F. Liang, P. Paris, R. K. Sheline, P. Alexa, “Alpha decay of 221Rn and 217Po; level structure of 217Po and the 213Pb ground state,” Czech.J.Phys. vol. 54, pp.189, 2004.