ENTRY 22257 20220212 23092225700000001 SUBENT 22257001 20220212 23092225700100001 BIB 11 44 2225700100002 TITLE Discovery of neutron-rich Co and Fe isotopes in 2225700100003 Pu-239(n,f), yields and half-lives 2225700100004 AUTHOR (M.Bernas,P.Armbruster,S.Czajkowski,H.Faust, 2225700100005 J.P.Bocquet,R.Brissot) 2225700100006 REFERENCE (J,PRL,67,3661,1991) 2225700100007 (R,IPNO-DRE-90-20,1990) - same data 2225700100008 (C,92BERNKAST,,557,1992) 2225700100009 INSTITUTE (2FR PAR) M.Bernas, S.Czajkowski 2225700100010 (2FR ILL) p.Armbruster, H.Faust, and experimental site.2225700100011 (2FR GRE) J.P.Bocquet, r.Brissot 2225700100012 FACILITY (REAC,2FR ILL) The high flux reactor at ILL. 2225700100013 (OLMS,2FR ILL) The recoil spectrometer lohengrin 2225700100014 at ILL, which has a resolving power in A/Q of 800. 2225700100015 a 3 mm wide slit corresponding to this resolving 2225700100016 power, allows a full transmission. 2225700100017 INC-SOURCE (REAC) 2225700100018 INC-SPECT Thermal neutron spectrum, with a flux of 5.0E+14 2225700100019 neutrons/cm2/sec. 2225700100020 SAMPLE A 0.10 mg/cm2 target of Pu-239, enriched to 99.99% 2225700100021 was used. It was covered with a 0.25 mg/cm2 2225700100022 nickel foil to reduce Pu sputtering. 2225700100023 METHOD (OLMS) The fission fragments were focused on lines of 2225700100024 a given A/Q ratio. 2225700100025 (REC) 2225700100026 (RELFY) The mass and elemental yields were determined 2225700100027 with reference to the well-known A=82 mass yield. 2225700100028 DETECTOR (IOCH) The energy of the fission fragments were 2225700100029 measured with a two-stage ionization chamber with a 2225700100030 1% accuracy, providing unambiguously the ionic 2225700100031 charge and mass number. In the first stage of the 2225700100032 chamber an energy-loss measurement gave the atomic 2225700100033 number of the fragments. 2225700100034 (SI) At the end of the fragment trajectories the 2225700100035 fragments were implanted into one of eight planar 2225700100036 Si-detectors of 10 x 10 x 0.5 mm3, where the residual 2225700100037 energy of the fragments and the energy-loss signals of2225700100038 the subsequent beta-decay were measured. From this the2225700100039 half-lives could Be determined. 2225700100040 HISTORY (19940123C) N.O. 2225700100041 (19951128U) SM: FACILITY code and free text specified.2225700100042 ERR-ANALYS keyword information corrected. 2225700100043 (20220212A) SD:Updated to new date formats,lower case. 2225700100044 Corrections in all Subents. Refs IPNO-DRE-90-20, 2225700100045 92BERNKAST added. 2225700100046 ENDBIB 44 0 2225700100047 COMMON 1 3 2225700100048 EN 2225700100049 EV 2225700100050 2.53E-02 2225700100051 ENDCOMMON 3 0 2225700100052 ENDSUBENT 51 0 2225700199999 SUBENT 22257002 20220212 23092225700200001 BIB 4 4 2225700200002 REACTION (94-PU-239(N,F)MASS,CHN,FY) 2225700200003 ERR-ANALYS (DATA-ERR) No information about source of uncertainty 2225700200004 STATUS (TABLE) Table I from Phys.Rev.Lett.,67(1991)3661 2225700200005 HISTORY (20220212U) SD: STATUS updated. 2225700200006 ENDBIB 4 0 2225700200007 NOCOMMON 0 0 2225700200008 DATA 3 3 2225700200009 MASS DATA DATA-ERR 2225700200010 NO-DIM PC/FIS PC/FIS 2225700200011 68. 6.60E-06 1.30E-06 2225700200012 69. 1.10E-05 2.00E-06 2225700200013 73. 1.50E-04 3.00E-05 2225700200014 ENDDATA 5 0 2225700200015 ENDSUBENT 14 0 2225700299999 SUBENT 22257003 20220212 23092225700300001 BIB 4 10 2225700300002 REACTION (94-PU-239(N,F)ELEM/MASS,IND,FY,,FRC) 2225700300003 DECAY-DATA (26-FE-68,0.1SEC) 2225700300004 (27-CO-68,0.18SEC) 2225700300005 (27-CO-69,0.27SEC) 2225700300006 STATUS (TABLE) Table I Phys.Rev.Lett.,67(1991)3661. Half-lives2225700300007 taken from table II of Phys.Rev.Lett.,67(1991)3661 2225700300008 HISTORY (19961128U) * * Reaction code structure corrected 2225700300009 keyword 'result' added * * 2225700300010 (20220212A) SD: REACTION code and STATUS updated. 2225700300011 HALF-LIFE -> DECAY-DATA. 2225700300012 ENDBIB 10 0 2225700300013 COMMON 3 3 2225700300014 HL1-ERR HL2-ERR HL3-ERR 2225700300015 SEC SEC SEC 2225700300016 0.06 0.1 0.05 2225700300017 ENDCOMMON 3 0 2225700300018 DATA 3 8 2225700300019 MASS ELEMENT DATA 2225700300020 NO-DIM NO-DIM NO-DIM 2225700300021 68. 26. 0.038 2225700300022 68. 27. 0.107 2225700300023 68. 28. 0.855 2225700300024 69. 27. 0.20 2225700300025 69. 28. 0.79 2225700300026 73. 28. 0.038 2225700300027 73. 29. 0.55 2225700300028 73. 30. 0.412 2225700300029 ENDDATA 10 0 2225700300030 ENDSUBENT 29 0 2225700399999 ENDENTRY 3 0 2225799999999