https://doi.org/10.1140/epjd/e2012-20562-2
Regular Article
The first experimental investigation of the KLL Auger spectrum of Ni generated in the electron capture decay of radioactive 64Cu in a solid state matrix
1
Laboratory of Nuclear Problems, JINR, 141980 Dubna, Moscow Region, Russian
Federation
2
Institute of Applied Physics, National University,
Taskent,
Republic of Uzbekistan
3
Nuclear Physics Institute of the ASCR,
Řež near Prague,
Czech Republic
a
e-mail: inoyatov@jinr.ru
Received:
30
September
2011
Received in final form:
28
May
2012
Published online:
6
September
2012
The KLL Auger spectrum of Ni generated in the electron capture decay of radioactive
64Cu in a solid state matrix was measured for the first time using a combined
electrostatic electron spectrometer adjusted to a 7 eV instrumental resolution. Energies
and relative intensities of the all nine basic spectrum components were determined and
compared with data obtained from X-ray induced spectra of metallic Ni and with theoretical
results as well. Absolute energy of 6562.5 ± 1.3 eV (related to the Fermi level)
measured for the dominant KL2L
D2)
spectrum line was found to be higher by 3.5 eV (2.5σ) than a value
obtained from the X-ray induced spectra which is probably caused by the effects of
chemical bonding and physico-chemical environment. Moreover, it is higher by 20.4 eV
(16σ) than a prediction of the semi-empirical calculations by Larkins
which indicates an influence of the “atomic structure effect” on absolute energies of the
Auger transitions following the electron capture decay and, possibly, some imperfections
in the calculations. Good agreement of the measured and predicted
KL1L
P0/1P1)
transition intensity ratios indicates perceptible influence of the relativistic effects on
the KLL Auger spectrum even at Z = 28.
Key words: Atomic Physics
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2012
