An attempt has been made to calculate the critical angular momentum ( ? _(crit )) from the experimentally measured total ER cross-sections and are compared with Bass model predictions (using PACE-2). A comparison between experimentally measured and theoretically calculated critical angular momentum for the systems ~(16) O + ~(45) Sc and ~(16) O + ~(74) g e has been done. In case of ~(16) O + ~(45) Sc system, it is found that the experimentally measured ? _(crit) values are slightly lower than the theoretically calculated values at projectile energies from 66 to 114 MeV. t he low values of ? _(crit) associated with IC f -channels for this system suggests that at these projectile energies, IC f may not be strictly associated with peripheral collision. Instead there appears to be deeper penetration of the projectile with the target at these beam energies. But for the system ~(16) O + ~(74) g e at projectile energies from 65 to 112 MeV, the experimentally measured ?_( crit) -values are consistent with theoretically calculated values. t his shows that ? _(crit) -values associated with IC f channels for this system suggests that at these projectile energies, IC f may be associated with peripheral collision.
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