[en] Investigations of the nucleus ⁸²Sr are considered particularly interesting, where very different configurations changing with spin and excitation energy may be observed. The present report describes the high spin band structure of ⁸²Sr deduced from an in-beam study. The experiments presented were carried out at the Niels Bohr Institute tandem accelerator laboratory. High-spin states in ⁸²Sr are populated using the ⁵⁸Ni(²⁸Si,4p)⁸²Sr reaction at a beam energy of 128 MeV. A stacked target of two self-supporting ⁵⁸Ni foils with a thickness of 0.34 mg/cm² is used. Gamma rays are detected in the NORDBALL array of 20 Compton suppressed germanium detector. Neutrons are also measured. Analysis is made of the gamma ray spectrum obtained by summing up spectra in coincidence with gamma rays in the negative parity band, in the odd spin band, in the ground band, or in the yrast band. An energy level scheme of ⁸²Sr is proposed and discussed. The kinematical moment of inertia is calculated and discussed as a function of rotational frequency for the rotational bands in ⁸²Sr. The quantum number K=0 is used in calculating the moment of inertia of the side bands. (N.K.)

[en] ¹⁵⁵Gd was produced in the ¹⁵⁰Nd(¹²C,α3n) reaction at 65 MeV. A partial level scheme constructed from γ-γ coincidence measurements is shown, and rotational bands are labeled. The ground-state rotational band in ¹⁵⁶Gd is also presented

[en] Published in summary form only

[en] The neutron deficient isotope ⁷⁹Y has been firstly identified and the decay properties were studied from β-decay measurements in the reaction of ⁵⁴Fe(²⁸Si, p 2n) at 92 MeV. Three γ rays of 152.5, 177.4, and 1106 keV were observed concerning the β decay. The half life and Q_EC value were determined to be 14.9±0.6 s and 7.12±0.45 MeV, respectively. The decay scheme including spin-parity is discussed, and 5/2⁺ assignment for the ground state is proposed. (orig.)

[en] The level structure of ⁸⁷Nb has been studied through β-decay of ⁸⁷Mo activity produced by the ⁵⁸Ni(³²S, 2pn) reaction and through in-beam γ-ray measurements in the ⁵⁸Ni(³²S, 3pγ)⁸⁷Nb reaction. In the β-decay study, the decay scheme of ⁸⁷Mo is constructed firstly from γ-ray energies, intensities of γ-rays and conversion electrons, and γγ-, βγ- and γ(ce)-coincidence relations. Spins and parities of the low-lying states of ⁸⁷Nb and ⁸⁷Zr were also investigated. In the in-beam study, intensities, coincidence relations and angular distributions of γ-rays were measured in coincidence with charged particles evaporated from the compound nuclei. Then high-spin states of J^π ≤ (33/2⁺) in ⁸⁷Nb were established in this study. Systematic behavior in the level structures of N=46 isotones, and the comparison between those of ⁸⁵Y and ⁸⁷Nb, are discussed. (orig.)

[en] The high-spin states of ¹⁴³Nd have been studied in ¹³⁰Te(¹⁸O, 5n) reaction at a beam energy of 80 MeV. Based on delayed γ-γ coincidence, γ ray angular distribution, and γ ray linear polarization measurements, a high-spin isomer in ¹⁴³Nd was identified for the first time with a measured half-life of (35 +- 8) ns and J^π = 49/2⁺. The characteristic of the high-spin isomer in ¹⁴³Nd was stressed with a deformed independent particle model. The model assigned a stretched configuration of [ν(f_7/2h_9/2i_13/2)π(h_11/2²)] to the 49/2⁺ isomer in ¹⁴³Nd As the isomers in the N = 83 heavier isotones, the occurrence of the 49/2⁺ isomer in ¹⁴³Nd can be interpreted to be caused by the sudden change in nuclear shape along the yrast line

[en] The high-spin states of ¹⁴³Nd have been studied in the ¹³⁰Te(¹⁸O, 5n)¹⁴³Nd reaction at a beam energy of 80 MeV using techniques of in-beam γ-ray spectroscopy. Measurements of γ-γ-t coincidences, γ-ray angular distributions, and γ-ray linear polarizations were performed. A level scheme of ¹⁴³Nd with spin and parity assignments up to 53/2⁺ is proposed. While a weak coupling model can explain the level structure up to the J^π = 39/2^- state, this model can not reproduce the higher-lying states. Additionally, a new low-lying non-yrast level sequence in ¹⁴³Nd was observed in the present work, which can be well described by the weak coupling the an i_13/2 neutron to the ¹⁴²Nd core nucleus

[en] The studies of nuclear high-spin physics in IMP have been reviewed with an emphasis on the level structure studies of ¹⁴³Nd and ²⁰⁶At. In the past years the research works at IMP have been centered in the mass regions of 130, 160 and 190. The level structures of ¹¹⁷Xe, ¹¹⁷Cs, ¹⁴³Nd, ¹⁴⁷Eu, ¹⁶²Lu, ¹⁶'9^,170Ta, ^197,198Bi, ²⁰⁶At, and ²⁰⁹Fr have been studied by the gamma group in IMP