Element 122 has never been synthesized; the only direct attempt on record (1972) produced no atoms, and no modern fusion–evaporation experiment has been carried out. This paper asks one quantitative question: what beam intensity would the fusion reaction 54Cr+249Cf demand to produce element 122 at a detectable rate? Rather than assert a cross section, the value is propagated from sourced anchors — the measured48Ca+249Cf→294Og and 50Ti+244Pu→290Lv cross sections and the full published spread of element-120 predictions, which ranges from ≈1 fb (fusion-by-diffusion) to ≈24 fb (modified fusion-by-diffusion) — using a transparent semi-empirical scaling with Monte-Carlo uncertainty. The propagation yields a median evaporation-residue cross section of ≈ 1.3 fb (90% interval ≈ 0.14–12 fb). At a realistic luminosity this implies arequired beam intensity of ≈ 110 particle-𝜇A of 54Cr for one detected atom per month (90% interval ≈ 12–1000 pμA) — roughly an order of magnitude above the design intensity, and forty times the achieved chromium intensity, of the world’s leading facility — corresponding to ≈ 30 kW of beam power on a target rated for ≈ 2.5 kW. The binding constraint is therefore identified as target survival, not ion-source current. Thework is explicitly a semi-empirical estimate, not the output of a validated reaction-dynamics code, and is presented as a calibration target for such a calculation.
Yen Amy (Sat,) studied this question.