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[en] A new radioactivity of Np was discovered by chemical separations from targets of 244Pu and 242Pu irradiated with 30--160 MeV neutrons. Five γ rays were identified with E/sub γ/, I/sub γ/: 159.1 keV, 32; 265.1 keV, 24; 785.7 keV, (100); 944.8 keV, 63; and 1104 keV, 0.6. The half-life is 5.5 +- 0.1 min and various cross bombardments established that the mass number is 242. I/sup r/ was assigned 6+ with the configuration 5/2+[642]/sub p/, 7/2+[624]/sub n/ and a decay scheme is proposed
Journal
Physical Review. C, Nuclear Physics; ISSN 0556-2813; 
; v. 23(5); p. 2234-2237
; v. 23(5); p. 2234-2237