O. Dragoun

A new method of valence state determination based on measurements of internal conversion electrons

Abstract The valence states of 99m Tc in technetium species deposited on solid surfaces were determined from the energy shifts of the M 4 and M 5 conversion electron lines of the 2.17 keV E3 transition in 99 Tc measured with electrostatic spectrometers. The total amount of Tc in one sample was of the order of 10 −11 g.

Internal conversion of high-multipolarity transitions in109Ag and113In

AbstractThe internal conversion coefficients were measured for the 88.032 keVE3 transition in109Ag using the 4π pressurized proportional counter, the windowless 4π scintillation counter and the double-focusing magnetic spectrometer. The results are:αT=26.4±0.4,αK=11.4±0.3,

SEARCH FOR AN ADMIXTURE OF HEAVY NEUTRINOS IN THE BETA -DECAY OF 241PU

\alpha _{L_1 } = 0.63 \pm 0.13, \alpha _{L_2 } = 5.48 \pm 0.18, \alpha _{L_3 } = 6.11 \pm 0.20, \alpha _M = 2.40 \pm 0.08, \alpha _{N\underset{\raise0.3em\hbox{

Oxidation states of 99mTc in technetium chelates studied by the ICES method

\smash{\scriptscriptstyle-}

TheKLL Auger spectrum of manganese

}}{O} } = 0.405 \pm 0.021

Low-energy transition depopulating the isomeric 8+ level in 208Po

. The theoretical conversion coefficients were calculated for this transition and for the 391.69 keV M4 transition in113In and were found to be in agreement with the experiment.

A full proton-neutron multiplet confirmed in odd-odd 204Bi

The internal conversion coefficients were calculated for the transitions in199Hg using both Hartree-Fock and Hartree-Fock-Slater atomic models. The relative conversion line intensities were measured with the magnetic spectrometers in Prague and Heidelberg. The multipolarities were determined to be:M1+(0.20±0.03)%E2, pure E2 and M 1+ (13.4 ±0.4)%E2 for the 50, 158 and 208 keV transitions, respectively. Allowing for the nuclear structure effect in M1 component we obtained: M1+(0.15±0.03) %E2,λ = 2.4±1.0 for the 50 keV and M1+ (10.9±0.7)% E2, λ=3.8±0.5 for the 208 keV transitions. Very good agreement was found between theory and experiment for the atomic subshells,K, L1−3,M1−5,N, andO + P.

Some nuclear and atomic properties of201Hg determined by conversion electron spectroscopy

The -spectrum of 241Pu with the endpoint energy of 20.8 keV was measured in the energy range from 0.2 to 9.2 keV. The spectra were recorded during 5700 h with an electrostatic spectrometer set to a resolution of E/E = 0.011. Electron energy losses within the radioactive source were treated by means of extensive Monte Carlo simulations of individual elastic and inelastic electron collisions. The upper limit for the admixture of hypothetical neutrinos with the rest masses between 14 and 17 keV/c2 was derived to be less than 0.40% (the lowest limit being 0.10% for the 16 keV/c2 mass) at the 95% C.L., independently of any free phenomenological parameter.