[en] With the help of quantum group SU_q(2) the energy bands of deformed and superdeformed nuclei has been calculated and their comparison with the experimental data has been made. For illustration calculation were made for ¹⁹⁴Pb and ¹⁶²Dy nuclei

[en] A program is currently in progress to produce a new edition of the original gamma-ray spectrum catalogs designed for presentation in electronic format. The incentive to expand and update the content and format of the spectrum catalogs resulted from the development of large-volume germanium detectors and a need for additional classes of spectral data to support new applications of gamma-ray spectrometry. Recent developments in information technology offer an opportunity to greatly enhance presentation of scientific material. The objective of this effort is to produce new, enhanced versions of germanium and NaI editions of the catalogs in CD-ROM format and to offer them as a resource on the Internet from the Gamma-Ray Spectrometry Center Web Site at Idaho National Engineering Laboratory (INEL). The major objective of this paper is to outline the technical approach being applied to produce the new versions of the spectrum catalogs, enhanced by the technology currently available for data processing, fullcolor display, and electronic publishing. Database technology, hypertext linking, and an advanced graphic user interface (GUI) will be incorporated to provide capabilities for specialized data retrieval

[en] The spectra analysis of temporal harmonics due to modulations of pumping RF or static magnetic fields under the excitation of gamma magnetic resonance is carried out. Coherent features of harmonics promoted to the enhancement of gamma radiation are considered. A special place is occupied by the study of in homogenous broadening effects. The consideration has shown that the analysis of harmonic spectra may be used for reconstruction of the hyperfine field distribution function in irregular solids. (author)

[en] The multilevel scheme of the gamma generation is proposed. The scheme is based on the use of X-ray emission of the laser driven plasma to pump the laser transition from the long living isomeric state. It is shown that the X-ray emission of the laser plasma can be effectively used for spectroscopy of the low-energy nuclear transition. The feasibility of excitation of isomeric state E = 1.56 keV (1/2^-) in ²⁰¹ Hg by the X-ray emission of the laser plasma is discussed. (authors)

[en] The ²H(d,γ)⁴He reaction is expected to be dominated by electric quadrupole (E2) s-wave (ell = 0) capture to the D-state (ell = 2) of ⁴He below E_d (lab) = 500 keV, where the centrifugal barrier should suppress the electric quadrupole (E2) d-wave (ell = 2) capture to the S-state (ell = 0). Enhancement of the total cross section below E_d (lab) = 500 keV has been attributed to this mechanism, although no direct evidence exists to support this claim. To investigate this issue, the author has measured the vector and tensor analyzing powers of the ²H(d,γ)⁴He reaction using an 80 keV beam of polarized deuterons. Results are presented for the vector and tensor analyzing powers A_y(θ) and A_yy(θ) and the differential cross section σ(θ)/A₀ for E_d(lab) = 80 - 0 keV at θ_c.m. = 0 degrees, 45 degrees, and 82 degrees. A model-independent transition matrix element analysis of the data finds that a major portion of the capture strength results from electric dipole (E1) and magnetic quadrupole (M2) p-wave capture (ell = 1). The data are also compared to a recent microscopic coupled-channel resonating group model calculation which includes electric quadrupole (E2), electric dipole (E1), magnetic quadrupole (M2), and magnetic dipole (M1) transitions and the coupled deuteron-deuteron, proton-triton, and neutron-³He channels. The model produces fair agreement with the experimental data when a semi-realistic force is used

[en] Simple analytical expressions for energies, transition density, reduced probabilities of transitions, amplitudes of vibrations, mass and stiffness parameters are obtained

[en] The decay of long-lived states created by an alternating radiation and especially terminating incident beam is investigated. For the case of recoilless interaction the population law of the scatterer differs from the Lorentzian one and hence the mode of decay is not an exponent. It is shown that for scattering and transmission the detected intensity consists of two terms - one for excited states and a second one accounting for states formed after the opening of the shutter. The contribution of each term is calculated. In addition the line broadening in transmission spectra is shown. 20 refs., 9 figs. (author)

[en] Results are presented obtained comparing the previously calculated theoretically accessible regions of relative probabilities of E2-transitions and the average values of electric quardupole moments of high-momentum excited states in the phenomenological collective model with last years experiments. Good agreement is found between the predictions and the available data

[en] Calculations of internal conversion coefficients (ICC) are performed by Dirac-Fock method for five nuclear transitions with minor energies to the ground states, including ¹⁰³Ru, M1+E2, E_γ=2.5 keV; ¹¹⁰Ag, E1, E_γ=1.09 keV; ¹⁴²Pr, M3+E4, E_γ=3.7 keV; ¹⁹³Pt, M1+E2, E_γ=1.63 keV; ²⁰¹Hg, M1+E2, E_γ=1.5 keV. ICC calculations are conducted for all the shells of the above mentioned atoms. Electron wave functions of the continuous spectrum are calculated in the frozen frame field with a vacancy in the shell, where conversion has taken place. Transition surface current pattern for a nucleus is used. The electron bridge contribution to ICC is small (<10^-4) in all cases. 3 refs.; 1 tab

[en] The influence of two-level tunnelling systems and ''bosonic peak'' on the second-order Doppler displacement of Moessbauer γ-radiation in disordered materials is investigated. It is shown, that the Moessbauer frequency temperature displacement at temperatures 10^-4 K < T < ω_mℎ/k_B is determined by ''bosonic peak'' and at T < 10^-4 K by two-level tunnelling systems. (orig.)