Final mass fractions of select radioactivities in the peak temperature–density plane for the exponential profile at Y _e = 0.48. The white colored space corresponds to values below the color scale shown. From left to right, the first row corresponds to ²⁶Al _m, ⁴¹Ca, and ⁴⁴Ti, the second row corresponds to ⁵³Mn, ⁶⁰Fe, and ⁷⁹Se, and the third row corresponds to ⁹²Nb, ⁹³Zr, and ⁹⁷Tc. The α-rich and α n-rich freeze-out regions are labeled on the temperature–density plane for ⁴¹Ca.