[en] A method is described for controlling the emission and direction of gamma rays from excited nuclei contained in a sample source of suitable geometry having its major axis parallel to the proposed direction of gamma ray emission, comprising subjecting said sample source to thermal or dynamic polarization at temperatures approaching absolute zero in the presence of a strong magnetic field, and when a pulse of coherent gamma radiation is required along said major axis rotating the active nuclei through 90⁰ by employing a short pulse of radio frequency oscillations in an auxilliary coil around the sample source

No abstract available

[en] In a recent paper Santilli has suggested the possible stimulated decay of neutrons of stable or unstable nuclei by electromagnetic quanta with certain characteristic frequencies of the electron. Independently, this author has studied the possible induced (stimulated) decay of the neutron by the same or lower characteristic electromagnetic frequencies. This possibility is applied to the study of externally induced beta decay of the deuteron which is endothermic and arguable vanishingly rare but models neutron-proton pairs in exothermic beta decays of heavier nuclei. A possible laboratory source of the inducing frequencies is identified. Since the neutron releases energy in its beta decay, confirmation of either or both of these predictions would prove the existence of an exploitable source of sub-nuclear energy. 15 refs

[en] We present results of a 1D analysis demonstrating that electrons oscillating in a Penning trap may drain the energy stored in an adjacent active medium. Consequently, energy imparted by the active medium to the electrons allows them to leave the trap. A simplified configuration is analysed in a self-consistent way and its equilibrium conditions are characterized assuming continuous pumping of the medium.

[en] In this work we present phase-resolved measurements of the stimulated emission process in a quantum cascade laser emitting at 11.7 µm. In particular, we are focusing on the temperature performance of the intersubband gain in a spectrally broad region. We find that the gain turns into strong absorption at higher temperatures. We show that the phase information is mandatory to describe the correct relation between stimulated emission and absorption. Due to the importance of the correct phase estimation, we present an extended noise analysis of our optimized electro-optic sampling detection scheme. The dynamic range is >80 dB with signal components between 6 and 67 THz

[en] A method for differentially exciting a selected isotopic species in a mixture of isotopic species is described characterized in that almost the entire isotopic mixture is placed in an excited gaseous state; and a preselected isotopic species is then selectively de-excited through stimulated emission

[en] Based on the difference in the bleaching rate between IRSL and TL signals, a new method of assessing the bleaching of sedimentary feldspar is proposed. All measurements for De and the bleaching factor (normalized ratio of IRSL to TL) are carried out on the same grain. K-feldspar grains from two sediments, a marine and an alluvium, from Hong Kong were tested. Their bleaching factors indicate that bleaching of the marine sediment was not uniform, whereas the latter was relatively homogeneous. Furthermore, the relatively well-bleached grains in each sample were identified

[en] The process of recording and reproducing information in a three-level system using stimulated photon echo is studied as a function of the amount of information embedded in the first and second two-frequency object laser pulses. It is shown that two-frequency information recording leads to an increase in the power of the stimulated photon echo response on one frequency transition and to its reduction on the other. (laser applications and other topics in quantum electronics)

No abstract available

[en] A microscopical description of stimulated emission in the framework of the modified Lee model is given. Besides this, the exact solutions in all sectors (n photons + atom) are obtained in the proposed model. (author)