[en] Experimental details are given of the re-determination of the half-lives of ¹⁰⁹Pd and ¹¹²Pd. The weighted mean half-life for ¹⁰⁹Pd is 13.427 +- 0.014 hours. The half-life for ¹¹²Pd is 21.045 -0.065 +0.029 hours. The value for ¹⁰⁹Pd agrees well with the value of 13.46 +- 0.02 hours adopted in Nuclear Data Sheets, but the value for ¹¹²Pd does not agree well with the value of 20.12 +-0.06 hours adopted in Nuclear Data Sheets. (U.K.)

[en] High spin sates have been established using γγ, x - x, x - γ, and γ γ γ coincidence techniques following the spontaneous fission of ²⁵²Cf. Data from a series of three different experiments conducted viz., with the early implementation of gammasphere at LBL, with the Compton-suppressed Ge-array at ORNL and x-γ setup of INEL, was used to establish the high spin structures. In ¹¹²Pd yrast levels with energies of 349, 883, 1550, 2318, 3050, 3598 and 4205 keV connected by E2 transitions have been identified. In ¹¹⁴Pd yrast levels with energies of 333, 852, 1500, 2216, 2860, 3443, 4147 and 5011 and in ¹¹⁶Pd levels with energies of 341, 878, 1560, 2344, 3092, 3684, 4395 and 5244 decaying through a cascade of E2 transitions have been established. Also γ-bands with energies of 737, 1096, 1362, 1759, 2002, 2483 and 2691 keV in ¹¹⁴Pd; 695, 1012, 1320, 1631, 1984, 2290, 2655, 2906, 3338 and 3504 keV in ¹¹⁴Pd; and 7838, 1067, 1374, 1719, 2101, 2493, 2931, 3256, and 3807 keV have been identified. In addition two negative parity bands with enerigies of 2183(5^-), 2599(7^-), 3105(9^-), 3738(11^-), 4473(13^-) and 5256(15^-) keV in ¹¹⁴Pd and 1984(5^-), 2437(7^-), 2972(9^-), 3632(11^-), and 4417(13^-) keV have been established. The systematics of the yrast bands in these nuclei will be discussed

[en] Studies of even-even nuclei in the A ∼ 100 transitional mass region within the framework of the interacting boson model-1 (IBM-1) have been expanded down to "9"8Pd nuclei to compare the calculation with new experimental results from measurements obtained at the Institute of Nuclear Physics in Cologne. The low-lying energy levels and the E2 transition rates of "9"8"-"1"0"0Pd nuclei are investigated and their geometric structures are described in the present work. We have also focused on the new B(E2:2_1"+ → 0_1"+) values of "1"1"2","1"1"4Pd nuclei to compare with previously calculated values. It is shown that the new results for the B(E2:2_1"+ → 0_1"+) values of "1"1"2","1"1"4Pd nuclei are more closer to the calculated ones than the earlier experimental data

[en] The current status and outlook for the Doppler-effect based lifetime measurements program at the National Superconducting Cyclotron Laboratory is presented, including the impact of the Digital Data Acquisition System which provides gamma-ray tracking capabilities for the Segmented Germanium Array. (author)

[en] The radiochemical method is for the first time used to measure the cumulative fission yield of ¹¹⁴Pd in ²⁵²Cf spontaneous fission. A value of (2.50 +- 0.11)% is obtained. In order to solve the discrepancy on the existence of fine structure in the mass distribution of ²⁵²Cf spontaneous fission, the cumulative yields of ¹¹²Pd and ¹¹³Ag^g are also measured. All these results and other available data are re-corrected and evaluated using the latest nuclear data. It is shown that there exists a fine structure peak on the mass distribution curve at A = 113

[en] Neutron-rich nuclei populated in spontaneous fission are providing new tests for microscopic models. The neutron-rich ^104-108Mo, ^108-114Ru and ^112-116Pd exhibit a variety of rapidly changing collective band structures to high spins. The first evidence for chiral band doublets in any even-even nucleus are reported

[en] Short communication. 1 ref., 1 fig

[en] The charge distribution in the alpha particle induced fission of ²⁰⁹Bi has been studied at alpha particle energy of 55.7 MeV and 58.6 MeV. The fractional cumulative yields of ⁹⁷Zr, ⁹⁹Mo, ¹⁰¹Mo and ¹¹²Pd have been determined using gamma ray spectrometry. The charge distribution have been found to be broad. (author). 4 refs., 1 ta b

[en] Transitions among high-spin states in ¹¹²,¹¹⁴,¹¹⁶Pd are observed through prompt γ-ray spectroscopy following the spontaneous fission of ²⁵²Cf. Spins and parities are assigned to many newly observed levels based on angular correlation analysis and comparison with known spins and parities of less neutron-rich Pd nuclides. The γ-band structures are significantly extended. New rotational band structures are observed for the first time, and tentatively assigned negative parity. IBA-1 model calculations are performed for the ground state and γ-bands. (author)

No abstract available