Blasmittel

Blasmittel is the designation given to a hypothesized element of the actinide series, purported to occupy atomic number 119 in the periodic table. The name is derived from the German words „blasma“ meaning “bright” and „mittel“ meaning “center,” reflecting its predicted position at the centre of the second row of transuranium elements. Blasmittel has not been synthesized or isolated in any laboratory, and its existence remains speculative, derived primarily from extrapolations of nuclear stability models and relativistic quantum calculations that predict a closed proton shell at Z = 118 or 120.

Theoretical studies suggest that if Blasmittel could be produced, it would exhibit a half‑life on the order of milliseconds and decay predominantly via alpha emission to element 115, moscovium. According to density functional theory, the element would be expected to possess a relatively high boiling point and a strongly correlated electronic structure due to the 7s2 6d1 7f? valence configuration. Its electronic configuration would place it among the superheavy elements that challenge current methods of synthesis due to the need for advanced neutron fluxes or high‑energy heavy‑ion accelerators.

Because no empirical data exist for Blasmittel, the element is not listed in the International Union of Pure and Applied Chemistry (IUPAC) “Current Accepted Element List.” Nonetheless, it serves as a useful benchmark in theoretical physics for testing models of nuclear binding energy, shell effects, and relativistic corrections. Researchers continue to explore the conditions under which element 119 could be generated, using facilities such as the RIKEN Nishina Center in Japan or the GSI Helm‑holtz Center for Heavy Ion Research in Germany.