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Towards the definition of the optimum height of voluminous cylindrical sources in gamma-ray spectroscopy
(Applied Radiation and Isotopes, 1999)
We show that for cylindrical voluminous sources in gamma-ray spectroscopy the relative error of the spectral intensity of a low-energy spectral line, as the height of the source increases, saturates faster than the spectral ...
Some observations on mechanical activation of the CeO2-ZrO2-SiO2 system
(Journal of Alloys and Compounds, 1999)
Mechanical activation of CeO2-ZrO2-SiO2 mixtures was performed in a high energetic vibratory mill with WC lining and grinding media. It was shown that in air atmosphere the reduction of Ce4+ into Ce3+ took place at 1400 ...
Minimal residual, disease in CML patients submitted to stem cell transplantation
(Bone Marrow Transplantation, 1999)
Fully relativistic description of extraordinary and quasilongitudinal waves propagating in plasmas
(Plasma Physics and Controlled Fusion, 1999)
Extraordinary and quasilongitudinal waves propagating at an arbitrary angle with respect to the steady magnetic field are investigated within the fully relativistic theory. The results of the present paper complement the ...
Prefission neutron multiplicities and the fission modes of Th-226
(Europhysics Letters / EPL, 1999)
The neutron spectra associated to the two fission modes of Th-226 have been measured in coincidence with the fragment yields of the O-18 + Pb-208 reaction at E-lab = 78 MeV. The pre- and post-fission multiplicities and ...
Extraction of thallium with butyl acetate
(Separation Science and Technology, 1999)
Experimentally obtained extraction isotherms of the system thallium-sulfuric acid-sodium chloride-butyl acetate are presented. The influence of the sulfuric acid and chloride anion concentrations on the extraction equilibria ...
The nuclear quadrupole interaction of Ta-181 in the intermetallic compound Hf2Rh
(Journal of Physics: Condensed Matter, 1999)
The time differential perturbed angular correlation technique has been used to measure the electric field gradient at Ta-181 impurities in the intermetallic compound Hf2Rh. The results of the measurements show the presence ...
Far-infrared study of impurity local modes in gallium-doped PbTe
(Infrared Physics and Technology, 1999)
We present far-infrared reflection spectra and results of galvanomagnetic measurements of PbTe single crystals doped with gallium between 10 and 300 K. The analysis of the far-infrared reflection spectra was made by a ...
Ultrafast rotational anisotropy measurements: unidirectional detection
(Journal of Physical Chemistry. Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory, 1999)
Unidirectional signal detection in time-resolved rotational anisotropy experiments has been known to affect the time zero and time infinity (persistent alignment) values because these measurements can overestimate the ...
Beam orbit simulation in the central region of the RIKEN AVF cyclotron
(Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 1999)
This paper describes the modification design of the central region for h = 2 mode of acceleration in the RIKEN AVF cyclotron. we made a small modification to the electrode shape in the central region for optimization of ...