Cluster radioactivity of Th isotopes in the mean-field HFB theory

Cluster radioactivity is described as a very mass asymmetric fission process. The reflection symmetry breaking octupole moment has been used in a mean field HFB theory as leading coordinate instead of the quadrupole moment usually used in standard fission calculations. The procedure has been applied to the study of the ``very mass asymmetric fission barrier'' of several even-even Thorium isotopes. The masses of the emitted clusters as well as the corresponding half-lives have been evaluated on those cases where experimental data exist.Comment: Contribution to XIV Nuclear Physics Workshop at Kazimierz Dolny, Poland, Sept. 26-29, 200

Pengaruh Pemberian Limbah Sereh Wangi Hasil Penyulingan Minyak Atsiri Sebagai Pakan Ternak Terhadap Penampilan Induk Sapi Bali

Research conducted at  Gowa Experimental Field  in Pa'bentengang Village, Bajeng District, Gowa South Sulawesi. The aim of research to determine the effect  of Addition Citronella Waste (Cymbopogon nardus L.) Essential Oil Refining Results as Forage Against Bali Cattle Appearance. This study was designed in a  Completely Randomized Design (CRD)  using 18 breeding Bali cattle aged 36 months-48 months divided into 3 treatment feed: A (elephant grass 100% + distillates citronella waste 0% + concentrate of 2 kg / head / day), B (elephant grass 80% distillates citronella waste 20% + concentrate of 2 kg / head / day), C (elephant grass 60% + distillates citronella waste 40% + concentrate of 2 kg / head / day ). The results showed that the 1 ha area planted with citronella, the carrying capacity of the waste citronella distillates based on dry matter (DM) in the first and second year in a row is 4:07 UT and UT 12.5. Average consumption of dry matter (DM) during the study is 5.35; 5.28; 5 in a row for treatments A, B, C, whereas daily weight gain in the treatment of a maximum of 0.26 kg / head / day, perlakuam B at 0:24 kg / head / day and treatment C of 0.20 kg / head / day.Key word : Waste, citronella, feed, cattl

Fission modes of mercury isotopes

Background: Recent experiments on beta-delayed fission in the mercury-lead region and the discovery of asym- metric fission in 180 Hg [1] have stimulated theoretical interest in the mechanism of fission in heavy nuclei. Purpose: We study fission modes and fusion valleys in 180 Hg and 198 Hg to reveal the role of shell effects in pre-scission region and explain the experimentally observed fragment mass asymmetry and its variation with A. Methods: We use the self-consistent nuclear density functional theory employing Skyrme and Gogny energy density functionals. Results: The potential energy surfaces in multi-dimensional space of collective coordinates, including elongation, triaxiality, reflection-asymmetry, and necking, are calculated for 180 Hg and 198 Hg. The asymmetric fission valleys - well separated from fusion valleys associated with nearly spherical fragments - are found in in both cases. The density distributions at scission configurations are studied and related to the experimentally observed mass splits. Conclusions: The energy density functionals SkM\ast and D1S give a very consistent description of the fission process in 180 Hg and 198 Hg. We predict a transition from asymmetric fission in 180 Hg towards more symmetric distribution of fission fragments in 198 Hg. For 180 Hg, both models yield 100 Ru/80 Kr as the most probable split. For 198 Hg, the most likely split is 108 Ru/90 Kr in HFB-D1S and 110 Ru/88 Kr in HFB-SkM\ast.Comment: 6 pages, 5 figures, to be published in Physical Review

Cluster radioactivity in superheavy nuclei

Cluster radioactivity is an exotic nuclear decay observed in actinides where a light nucleus is emitted while the remaining heavy mass residue is the doubly magic Pb208 or a nucleus in its neighborhood. We have investigated this type of decay in heavier nuclei up to Lv (Z=116) within a microscopic theory. It has been found that the cluster radioactivity known in the light actinides may become the dominant decay channel in some superheavy nuclei. This superasymmetric fission channel is distinct from typical asymmetric fission in actinides. We predict a sharp fission fragment mass distribution with the heavy fragment close to Pb208.This work was partly supported by the Polish National Science Centre under Contracts No. 2016/21/B/ST2/01227 and No. 2017/24/T/ST2/00396. The work of L.M.R. was supported by Spanish Grants No. FPA2015-65929-P MINECO and No. FIS2015-63770-P MINEC