Eur. Phys. J. A (2011) 47: 84
https://doi.org/10.1140/epja/i2011-11084-5

Regular Article - Experimental Physics

Experimental investigation of ligand effects on the conversion electron spectrum of the 22.5 keV M1 + E2 nuclear transition in ¹⁴⁹Sm

¹ Laboratory of Nuclear Problems, JINR, Dubna, Moscow Region, Russian Federation
² Institute of Applied Physics, National University, Tashkent, Republic of Uzbekistan
³ Nuclear Physics Institute of the ASCR, Řež Prague, Czech Republic

^* e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Received: 2 April 2011
Revised: 11 June 2011
Accepted: 20 June 2011
Published online: 15 July 2011

Abstract

The conversion electron spectrum of the 22.5keV M1 + E2 nuclear transition in ¹⁴⁹Sm from the electron capture decay of ¹⁴⁹Eu was experimentally studied for the “Eu₂O₃” and “EuF₃” compounds in which ¹⁴⁹Eu ions have the same assumed oxidation number +3 . While the energies of the L, M, N, O, and P₁ conversion lines for “EuF₃” were lower, on average, by 1.7(1), 2.7(2), 2.3(3), 4.1(2), and 5.7(9)eV, respectively, than those for “Eu₂O₃”, no changes between the two ligand complexes were observed for relative intensities of the conversion lines and their natural widths within the error limits.