On the synthesis of element 105

Synthesis of the heaviest elements in 48Ca-induced reactions

“…The production cross section, the identification, as well as the decay properties of the Z = 112, 114 and now 116 were recently confirmed in several independent experiments [20][21][22]. Now we shall discuss the decay properties of the synthesized nuclei.…”

“…+ 22 Ne, 26 Mg and 36 S (5n), are presented in Fig. 2d [18][19][20][21][22][23][24] (the neutron number of the corresponding compound nuclei is shown on the horizontal axis). Since there is no significant hindrance for fusion in such mass-asymmetric reactions (Z P · Z T = 920-1500), the strong decrease in the cross section σ 4n is connected mainly with the survivability of the nu- clei.…”

“…Because of the high hindrance of spontaneous fission for the nuclei with odd number of protons (and neutrons) and relatively low T α the isotopes of elements 113 and 115 with N = 169-173 undergo α decay [19,20]. In the products of the sequential α decay of these nuclides the T SF values increase upon approaching to the shell N = 162.…”

TASISpec—A highly efficient multi-coincidence spectrometer for nuclear structure investigations of the heaviest nuclei

“…For instance, the discovery of element Z = 100 was published in the 1950's [1], Z = 105 in the 1970's [2], Z = 110 in the 1990's [3], and Z = 118 -the heaviest element claimed so far -in the 2000's [4].…”

The Transuranium Elements: From Neptunium and Plutonium to Element 112

“…reported in 1970 [38] that they had produced a 0.1-to 0.3-s a-emitter at the 300-cm Cyclotron at Dubna in the following reaction:…”