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A novel radiation pressure acceleration (RPA) regime of heavy ion beams fromlaser-irradiated ultrathin foils is proposed by self-consistently taking intoaccount the ionization dynamics. In this regime, the laser intensity isrequired to match with the large ionization energy gap when the successiveionization of high-Z atoms passing the noble gas configurations [such asremoving an electron from the helium-like charge state $(\text{Z}-2)^+$ to$(\text{Z}-1)^+$]. While the target ions in the laser wing region are ionizedto low charge states and undergo rapid dispersions due to instabilities, aself-organized, stable RPA of highly-charged heavy ion beam near the laser axisis achieved. It is also found that a large supplement of electrons producedfrom ionization helps preserving stable acceleration. Two-dimensionalparticle-in-cell simulations show that a monoenergetic $\text{Al}^{13+}$ beamwith peak energy $1\ \text{GeV}$ and energy spread of $5\%$ is obtained bylasers at intensity $7\times10^{20}\ \text{W}/\text{cm}^2$.

Generation of high-energy monoenergetic heavy ion beams by radiation pressure acceleration of ultra-intense laser pulses