Energy Of Excited Levels Research Articles

Testing the modified dependence of the radiative strength function on different excitation energies in the light nucleus 28Al

Abstract The spectrum of random functions of level density as well as radiative strength functions of dipole E1- and M1-transitions of 28Al were determined. Obtained functions can reproduce very precisely the intensity of the two-step cascade following the radiative capture of thermal neutrons for a given energy of the primary transitions. The density of the observed intermediate levels can be reproduced correctly using the mean value of these functions. In this work we proposed a new hypothesis about the dependence of radiative strength functions for gamma-transitions in heated nucleus on the energy of excited levels. The results provide a solid basis that this new hypothesis allows to get realistic estimation on the parameters of nuclear structure in any nucleus, including the light ones.

Thermal Neutron Capture Investigation of the 172Yb and 174Yb Level Structures

The energies and intensities of gamma radiation from thermal neutron capture in 171Yb and 173Yb have been determined by means of a Ge(Li) pair and anti-Compton spectrometer. Internal reactor targets have been used. The reaction Q-values, energies of excited levels and decay schemes of 172Yb and 174Yb have been deduced. The positions of the Kπ = 0-, 1- octupole vibrational states in 172Yb are discussed.

Eine Anordnung f�r Experimente zur Elektronenstreuung unterhalb 60 MeV

The facilities for electron scattering experiments at the Darmstadt electron linear accelerator (60 MeV at zero current) are described. They include an energy analyzing system with three 40° magnets and a 120° double focussing (n=0.5) magnetic spectrometer. Spectra of electrons scattered inelastically from carbon are presented up to 20 MeV excitation energy. For the scattering peaks, total half widths down to about 100 keV are obtainable at 52 MeV. Energies of excited levels can be measured with an accuracy of ±10 keV in favourable cases.