The fragmentation of 44 MeV/u 40Ar projectiles on a 166 mg/cm2 lslTa target was used to search for extremely neutron-rich nuclei a t the the neutron drip line. The =C isotope (T, = + 5 ) is identified for the first time and the recent observations of "B and =N are confirmed.
* * *One of us (SDH) wishes to thank the U.K. Science and Engineering Research Council for support and members of the IPN Orsay-GANIL collaboration for their kind hospitality.
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