[en] The theory of the problem of the direct effect of intense laser field on nuclear gamma and beta decays is briefly summarized. The laser-assisted internal conversion process and electronic-bridge mechanism, which seem to be candidate processes where the intense field can modify nuclear transitions, are treated in one model. As their characteristics near the threshold and near a resonance have special interest they are investigated in more detail. The recent results on laser-assisted alpha decay are also discussed. (author) 38 refs

[en] It is experimentally ascertained that massive nuclear-unstable fragments, occurring in ²³⁸U nucleus splittings by 1 GeV energy protons, overcome multibody decay. The most probable quantity of charged particles produced therewith equals to 8+-1

[en] Based on the decay scheme, the formulas for calculating the correction factors of the γ-ray coincidence summing effects are deduced. The corrections for the coincidence of γ-rays with X-rays (from electron capture or internal conversation) and with annihilation quanta from positron decay are also discussed. The full energy-peak efficiency of the HPGe detector at different source-to-detector distance is calibrated by using the multi-γ-ray sources calibration method combined with the distance variation method with several single-γ-ray sources. The error of the efficiency is less than 3% at the energy range of 60-1116 keV. The peak-to-total ratio is determined for the single-γ-ray sources. The coincidence summing correction factors for Eu, Co and Na are calculated

[en] The model of antiproton annihilation on light nuclei is suggested. Comparison to vast experimental data on multiplicities, inclusive spectra and angular correlations obtained in the annihilation of antiprotons on helium nuclei is carried out. The model is shown to describe well experimental data. Possibiliies of experimental observation of nontrivial antiproton annihilation mechanism on helium nuclei are descussed

[en] It is more and more difficult to synthesis and study new nuclei along the proton drip-line by using on-line isotope separator because of its low efficiency. A specific method of 'p-γ' coincidence measurement, using the known low-lying '2⁺→0⁺ (ground state)' γ transition of the 'daughter' nucleus in coincidence with its β-delayed proton, could increase the detection sensitivity effectively and was used to identify and study the precursors, new nuclei ¹³⁵Gd and ¹²¹Ce with a He-jet recoil fast tape transport system at HIRFL in China. It is prospected to synthesis and study more nuclei along the proton drip-line of Z =3D 0.743 N + 11.6 in the rare-earth region by this technique

[en] A high-resolution HPGe detector was used to determine the K-capture probabilities in the decay of ¹⁵²Eu. The P_K values leading to 1529 keV. 1233 keV. 1085 keV levels in the daughter nucleus were determined by the sum peak method. The P_K value leading to the level at 1085 keV is determined for the first time. P_L values for the three levels are deduced using the present experimental P_K values and theoretical P_L/P_K ratios. The dependence of P_K values on the Q value is also tested

[en] Short communications only

[en] A brief review of evaluation works on nuclear structure data in Japan through 1965 is given chronologically. Main activities in Japan are as follows: (1) contribution to ENSDF through 1979 by the JNDC-ENSDF working group, (2) evaluation of the decay data for estimation of decay heat of the shutdown nuclear reactor, and (3) prediction of band-structure in excited states of non-rotational nuclei. (author)

[en] Short communication

[en] The authors report that the new heavy neutron-rich isotope ²³⁹Pa has been observed for the first time and its half life has been determined to be 106 +- 30 min