[en] Within the framework of the manifestly left-right symmetric model SU(2)_LxSU(2)_RxU(1) we have made an analysis of the complete experiment in beta-decay, which includes: the data on neutron half life, on beta decay asymmetry correlation coefficient, on beta and neutrino asymmetry coefficients from polarized neutron decay, on the antineutrino polarization, estimated from cross section of the inverse beta-decay on proton, and on the positron polarization in beta-transitions of nuclei. The information on the right-handed currents is connected with three parameters: the ratio of squared masses of two W_LR-bosons, the mixing angle and the magnitude of the axial constant renormalization, which in the absence of the right-handed currents should recover the known constant λ = g_A/g_V. The joint treatment of the whole set of the above mentioned experiments yields the following bounds on these parameters

[en] A cluster model employing a local, effective cluster-core potential is used to investigate exotic decay from heavy nuclei as a quantum tunneling phenomenon within a semiclassical approximation. Excellent agreement with all reported experimental measurements of the decay widths for /sup 14/C and /sup 24/Ne emission is obtained. As an added bonus, the width for alpha particle emission from /sup 212/Po is also calculated in good agreement with experiment

[en] According to the Dirac theory, the double β-decay is accompanied by the simultaneous emission of two neutrinos. Indirect evidences exist for the occurence of any type of double β-decay in nature. A time projection chamber (TPC) experiment is described that yields a direct evidence of the double β-decay. The sample is selenium enriched to 97% in ⁸²Se. Several ββ (2 ν) events were detected in the TPC, a half life of 1.1x10²⁰ year was obtained. (R.P.) 9 refs.; 4 figs

[en] The O(6) limit of IBA-I is applied to the calculation of E2/M1 mixing ratios. The extended E2 transition operator and the complete second order M1 transition operator are used. It is shown that a satisfactory description of M1 admixtures can be obtained with the extended operators used in the present work. (orig.)

[en] The spontaneous Λ⁰ emission as a natural strange radioactivity is investigated in detail by using the Optical theorem for the inclusive decay processes. (authors)

[en] The reduced alpha widths of even-even nuclei with N≥84,Z≤84 display a systematic behavior with only few anomalies. The widths were deduced from the known alpha-decay half-lives and branching ratios, with penetration factors calculated from realistic cluster wave functions. Predictions are reported for the half-lives of naturally occurring long-lived nuclei as well as the half-lives and branching ratios of short-lived proton-rich nuclei away from the line of beta stability

[en] Nuclear emulsions were irradiated in the presence of ²⁵²Cf source at a total spontaneous fission number of 9.66* 10⁶. Upper limits for pion emission in the range 10^-7, depending on the pion energy, were derived. (authors)

[en] This chapter presents the main features of the physics of radioactivity, structure of the atom, ionizing radiation, concepts in radioactivity. Properties of radiations and interactions with matter are discussed. (U.K.)

[en] The microcanonical Metropolis sampling method is used to simulate the nuclear fragmentation at excitation energies between ∼10 MeV and 2 GeV. Contrary to the usual canonical description of compound nucleus decay the total energy, momentum, mass and charge of the system are strictly conserved quantities. No artificial heat bath is needed. The calculated mass distribution, charge dispersion and energy-spectra are in good agreement with the data of nuclear fragmentations induced by highly energetic protons. The possible characteristics of the statistical decay of the exotic nucleus are discussed

[en] The decay properties of ⁶¹Cu produced by ⁵⁹Co (α, 2n) reaction is investigated with a 100 cc Ge(Li) detector. The present study confirms the presence of 215.5, 625.5, 947.3 and 1014.4 keV gamma transitions reported by Meyer et al. A new 117.5 keV gamma transition is also observed in the present studies. Evidence for the existence of 701.1 and 2120 keV gamma transitions is found. There is no indication for the other new gamma-rays reported by Meyer et al. The rest of the decay scheme agrees with that of earlier investigations