The phrase "after attainment of" is correct and usable in written English.
It can be used in contexts where you want to indicate that something occurs following the achievement or reaching of a particular goal or milestone.
Example: "After attainment of the required qualifications, she was promoted to a managerial position."
Alternatives: "upon achieving" or "after achieving".
A more appropriate measure is probably life expectancy after attainment of adulthood.
The cells were harvested after attainment of 75-80% confluence using trypsin (0.025%) and EDTA (0.52 mM) in phosphate buffered saline (PBS).
The extent and onset of coalescence after attainment of minimum particle size in the initial region of the screw in reactive nylon 6/SAN blends was found to be strongly dependent on the screw speed and configuration.
Height undoubtedly changes more dramatically than other bone sites after attainment of peak bone mass.
After attainment of Cmax, plasma concentrations decreased slowly.
Fatigue and reduced physical condition are frequently expressed complaints by patients, even after attainment of remission.
Further whipping after the attainment of the maximum swelling capacity resulted in a decrease in swelling capacity.
The solution was taken in conical flak, treated with 0.5 g of the adsorbent and after the attainment of equilibrium, the final concentration of Cd II) was determined.
One important result of these experiments, which may have important implications in modeling ice impacts, involves the post "peak-stress" behavior of the ice in that the ice samples do not catastrophically lose their load carrying capacity even after the attainment of peak stress during dynamic compression.
Other Sautrāntikas, such as Vasumitra, content that in effect a subtle form of consciousness continues even after the attainment of cessation, for to assume otherwise would be equivalent to claiming that life can continue without consciousness (an untenable position for the Buddhist).
The Vaibhāṣika rebuttal to the notion that some subtle form consciousness persists even after the attainment of cessation points to the tripartite nature of the dependently arising cognitive phenomena: cognitive awareness, being inherently intentional, is always directed toward an object, and whenever there is contact with such an object there is feeling and apperception.
