[en] Relativistic fragmentation of ²⁰⁸Pb has been used to produce excited states in neutron-rich nuclei with N ∼ 126. Spectroscopic information for a range of nuclei has been obtained through observing delayed γ -ray emissions from isomeric states. Preliminary results for ^203,204Pt nuclei are presented. For the first time, excited states have been observed in ²⁰³Pt and ²⁰⁴Pt. The yrast structure of ²⁰⁴Pt up to spin-parity, I^π =(10⁺) has been tentatively inferred from the internal decay of two isomeric states (author)

[en] Evaluated nuclear structure and decay data for all nuclei within the A = 203 mass chain are presented. This work supersedes the earlier evaluation by S. Rab (1993Ra11), published in Nuclear Data Sheets 70, 173 (1993)

[en] The multinucleon transfer reaction of ${}_{136}\text{Xe}+{}^{198}\text{Pt}$ at $E_{\mathrm{lab}}=7.98\text{MeV/nucleon}$ is investigated by using the improved quantum molecular dynamics model. The quasielastic, deep-inelastic, and quasifission collision mechanisms are studied via analyzing the angular distributions of fragments and the energy dissipation processes during the collisions. The measured isotope production cross sections of projectile-like fragments are reasonably well reproduced by the calculation of the ImQMD model together with the GEMINI code. The isotope production cross sections for the target-like fragments and double differential cross sections of ¹⁹⁹Pt, ²⁰³Pt, and ²⁰⁸Pt are calculated. It is shown that about 50 new neutron-rich heavy nuclei can be produced via deep-inelastic collision mechanism, where the production cross sections are from ${10}^{-3}$ to ${10}^{-6}\text{mb}$. The corresponding emission angle and the kinetic energy for these new neutron-rich nuclei locate at ${40}^{\circ }\text{–}{60}^{\circ }$ and 100–200 MeV, respectively.

[en] Heavy neutron-rich nuclei were populated via the fragmentation of a E/A=1 GeV ²⁰⁸₈₂Pb beam. Secondary fragments were separated and identified and subsequently implanted in a passive stopper. By the detection of delayed γ rays, isomeric decays associated with these nuclei have been identified. A total of 49 isomers were detected, with the majority of them observed for the first time. The newly discovered isomers are in ^204,205₈₀Hg, ^{201,202,204,205}₇₉Au, ^197,203,204₇₈Pt, ^195,199-203₇₇Ir, ^193,197-199₇₆Os, ¹⁹⁶₇₅Re, ^190,191₇₄W, and ¹⁸⁹₇₃Ta. Possible level schemes are constructed and the structure of the nuclei discussed. To aid the interpretation, shell-model as well as BCS calculations were performed.