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²⁰N is particle stable. Its atomic mass excess is 21.770 ± 0.050 MeV (1995AU04). It has been observed in heavy-ion transfer (1989OR03) and projectile fragmentation reactions (1987GI05, 1988DUZT, 1988MU08, 1990MU06, 1991OR01) and in target fragmentation reactions (1988WO09, 1991RE02, 1993WOZZ). See also the review (1988VIZP). Mass measurements were reported in (1987GI05, 1988WO09, 1989OR03, 1991OR01, 1993WOZZ). Nuclear matter rms radii have been derived from measurements of interaction cross sections of ²⁰N on carbon by (1995CH1X, 1996CH24, 1996KR1A). Measurements of beta-delayed neutron emission are described in (1988DUZT).

The half-life of ²⁰N is 70 ± 40 ms (1988DUZT), 100⁺³⁰_-20 ms (1988MU08, 1990MU06), 142 ± 19 ms (1991RE02).

The delayed neutron probability is 53⁺¹¹_-7% (1988MU08, 1990MU06), 66.1 ± 5.0% (1991RE02). See also (1987BAZI, 1987DE1O, 1987DUZU, 1987SIZX, 1989HU1E, 1993REZX).

A review of the production of nuclei far from stability is presented in (1989VOZM). Production mechanisms are discussed in (1988BAYZ). Predictions of beta-decay half-lives are described in (1990ST08). Results of shell model calculations related to exotic light nuclei are discussed in (1992WA22, 1993PO11). Bulk properties have been calculated with relativistic mean field theory in (1993PA14).