Abstract
The gamma ray and conversion electron spectra of the 22.5keV M1 + E2 nuclear transition depopulating the first excited level 5/2− in 149Sm were investigated in detail. A substantially improved value of 22500.2 ± 0.8 eV for the transition energy was determined that opens a possibility to establish an electron energy standard for the keV region based on the conversion electron lines of this transition. The E2 admixture parameter |δ(E2/M1)| = 0.0784 ± 0.0009 and the nuclear structure parameter λ = − 2 ± 10 were derived. The |δ(E2/M1)| and λ parameters were also obtained for all available experimental data and their mutual combination.
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References
Balraj Singh, Nucl. Data Sheets 102, 1 (2004).
R.A. Meyer, J.W.T. Meadows, E.S. Macias, J. Phys. G 8, 1413 (1982).
S. Antman, H. Pettersson, Z. Zehlev, I. Adam, Z. Phys. 237, 285 (1970).
R. Röhlsberger, K.W. Quast, T.S. Toellner, Phys. Rev. Lett. 87, 047601 (2001).
S. Kitao, T. Mitsumi, M. Seto, J. Phys. Soc. Jpn. 69, 683 (2000).
D. Venos, M. Zbořil, J. Kašpar, O. Dragoun, J. Bonn, A. Kovalík, O. Lebeda, N.A. Lebedev, M. Ryšavý, K. Schlosser, A. Spalek, Ch. Weinheimer, Meas. Tech. 53, 573 (2010).
A.Kh. Inoyatov, I. Adam, D.V. Filosofov et al., Proceedings of the 56th International Conference on Nuclear Spectroscopy and Nuclear Structure “Nucleus 2009” (15–19 June 2009, Cheboksary, Russia) (Saint Petersburg 71, 2009).
A.Kh. Inoyatov, V.M. Gorozhankin, A. Kovalík et al., Proceedings of the 57th International Conference on Nuclear Spectroscopy and Nuclear Structure “Nucleus 2010” (6–9 June 2010, Saint Petersburg, Russia) (Saint Petersburg 86, 2010).
J. Frána, Radioanal. Nucl. Chem. 257, 583 (2003).
R.B. Firestone, V.S. Shirley, Tables of Isotopes, 8th edition (Wiley, New York, 1996) Appendix C-3.
Ch. Briançon, B. Legrand, R.J. Walen et al., Nucl. Instrum. Methods 221, 547 (1984).
G.L. Borchert, W. Scheck, K.P. Wieder, Z. Naturf. A 30, 274 (1975).
M. Lederer, V.S. Shirley, Tables of Isotopes, 7th edition (Wiley, New York, 1978) Appendix 3.
K.D. Sevier, At. Data Nucl. Data Tabl. 24, 323 (1979).
V.S. Shirley, Nucl. Data Sheets 64, 505 (1991).
I.M. Band, At. Data Nucl. Data Tabl. 81, 1 (2002) http://physics.anu.edu.au/nuclear/bricc/
A. Inoyatov, D.V. Filosofov, V.M. Gorozhankin et al., J. Elect. Spec. Relat. Phenom. 160, 54 (2007).
H.C. Pauli, Helv. Phys. Acta 40, 713 (1967).
O. Dragoun, Adv. Electron. Electron Phys. 60, 1 (1983).
M. Ryšavý, O. Dragoun, Comput. Phys. Commun. 19, 93 (1980).
M. Ryšavý, O. Dragoun, M. Vinduška, Czech. J. Phys. B 27, 538 (1977).
O. Dragoun, V. Brabec, M. Ryšavý, A. Spalek, Z. Phys. A 281, 347 (1977).
C.C. Lu, T.A. Carlson, F.B. Malik et al., At. Data 3, 1 (1971).
R.S. Hager, E.C. Seltzer, Nucl. Data Tabl. A 6, 1 (1969).
K.P. Artamonova, N.B. Grachev, E.P. Grigorev et al., Izv. Akad. Nauk SSSR Ser. Fiz. 45, 108 (1981).
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Communicated by A.A. Korsheninnikov
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Inoyatov, A.K., Filosofov, D.V., Gorozhankin, V.M. et al. Improved characteristics of the 22.5 keV (M1 + E2) nuclear transition in 149Sm. Eur. Phys. J. A 47, 64 (2011). https://doi.org/10.1140/epja/i2011-11064-9
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DOI: https://doi.org/10.1140/epja/i2011-11064-9