ENTRY 14564 20190731 14561456400000001 SUBENT 14564001 20190731 14561456400100001 BIB 11 23 1456400100002 TITLE Extension of the Fission-Product Region and Yields of 1456400100003 Heavy Products in the Neutron Fission of Plutonium-239 1456400100004 AUTHOR (L.R.Bunney,E.M.Scadden,J.O.Abriam,N.E.Ballou) 1456400100005 REFERENCE (C,58GENEVA,15,444,1958) 1456400100006 INSTITUTE (1USANRD) 1456400100007 FACILITY (REAC,1USAINL) Material testing reactor. 1456400100008 SAMPLE A 1-10 milligrams of PuO2 enclosed in in thin (0.0005 1456400100009 in) nickel foil to catch fission fragments. 1456400100010 DETECTOR (PROPC) Side-window, gas-flow, proportional counters. 1456400100011 METHOD (CHSEP,ACTIV) Three irradiations were performed at 1456400100012 thermal neutron flux of 10**14 n/cm**2/sec with 1 mg 1456400100013 sample. A fourth irradiation of approximately 10 mg 1456400100014 of PuO2 was performed at a flux of 1.5*10**13 1456400100015 n/cm**2/sec. After irradiation the capsules were 1456400100016 opened and nickel-wrapped samples were removed. The 1456400100017 samples, including the nickel foil, were dissolved in 1456400100018 hot HCl and then treated with HNO3. All counting was 1456400100019 done in proportional counters. The radiochemical 1456400100020 purity of each sample was determined by its decay 1456400100021 characteristics. 1456400100022 ANALYSIS (DECAY) 1456400100023 MONITOR (94-PU-239(N,F)42-MO-99,CUM,FY) 1456400100024 HISTORY (20190731C) BP 1456400100025 ENDBIB 23 0 1456400100026 COMMON 2 3 1456400100027 EN-DUMMY MONIT 1456400100028 EV PC/FIS 1456400100029 0.0253 6.1 1456400100030 ENDCOMMON 3 0 1456400100031 ENDSUBENT 30 0 1456400199999 SUBENT 14564002 20190731 14561456400200001 BIB 4 13 1456400200002 REACTION (94-PU-239(N,F)ELEM/MASS,CUM,FY) 1456400200003 CORRECTION The correction for neutron capture in 155Eu to form 1456400200004 156Eu was calculated to be less than 4% in the se 1456400200005 short irradiations (10 hr) . 1456400200006 DECAY-DATA ((1.)58-CE-144,280.0D) 1456400200007 ((2.)60-ND-147,11.1D) 1456400200008 ((3.)61-PM-149,53.0HR) 1456400200009 ((4.)62-SM-153,47.0HR) 1456400200010 ((5.)63-EU-156,15.4D) 1456400200011 ((6.)64-GD-159,18.0HR) 1456400200012 ((7.)65-TB-161,6.8D) 1456400200013 ((8.)66-DY-166,82.0HR) 1456400200014 STATUS (TABLE) Table 1, page 445. 1456400200015 ENDBIB 13 0 1456400200016 NOCOMMON 0 0 1456400200017 DATA 4 8 1456400200018 ELEMENT MASS DATA DECAY-FLAG 1456400200019 NO-DIM NO-DIM PC/FIS NO-DIM 1456400200020 58.0 144.0 3.6 1. 1456400200021 60.0 147.0 2.2 2. 1456400200022 61.0 149.0 1.4 3. 1456400200023 62.0 153.0 0.33 4. 1456400200024 63.0 156.0 0.10 5. 1456400200025 64.0 159.0 0.021 6. 1456400200026 65.0 161.0 0.0039 7. 1456400200027 66.0 166.0 0.000068 8. 1456400200028 ENDDATA 10 0 1456400200029 ENDSUBENT 28 0 1456400299999 ENDENTRY 2 0 1456499999999