ENTRY 21412 20230315 231621412 0 1 SUBENT 21412001 20230315 231621412 1 1 BIB 12 25 21412 1 2 TITLE Mass distribution in the fission of Np-237 with 21412 1 3 epi-cadmium neutrons 21412 1 4 AUTHOR (R.Stella,L.G.Moretto,V.Maxia,M.Di Casa,V.Crespi, 21412 1 5 M.A.Rollier) 21412 1 6 INSTITUTE (2ITYPAV) Radio chemistry lab. 21412 1 7 REFERENCE (J,JIN,31,3739,1969) 21412 1 8 (J,RIC,37,357,1967) - part of data. 21412 1 9 FACILITY (REAC,2ITYPAV) 21412 1 10 INC-SOURCE (REAC) Reactor neutrons. 21412 1 11 INC-SPECT The reactor spectrum has a thermal flux of 21412 1 12 1.0E+13 n/sec and a cadmium ratio for gold of about 2.21412 1 13 The sample of Np-237 was shielded by 2 mm cadmium to 21412 1 14 eliminate thermal capture. 21412 1 15 SAMPLE Neptunium dioxide from O.R.N.L. 10 mg NpO2 and 0.6 mg 21412 1 16 of 93% enriched uranium 235. Fission products 21412 1 17 were chemically separated by precipitation and 21412 1 18 solvent extraction procedures before counting. 21412 1 19 METHOD (ACTIV) 21412 1 20 DETECTOR (NAICR) NaI(Tl) crystal, 3 by 3 inch. 21412 1 21 ERR-ANALYS (DATA-ERR) Uncertainties are one standard deviation 21412 1 22 from average of several independent measurements. 21412 1 23 HISTORY (19800304C) 21412 1 24 (20211224A) SD:Updated to new date formats,lower case. 21412 1 25 Corrections in all Subents. 21412 1 26 (20230315U) SD: Ref. RIC,37,357 added. 21412 1 27 ENDBIB 25 0 21412 1 28 COMMON 1 3 21412 1 29 EN-MIN 21412 1 30 EV 21412 1 31 6.3000E-01 21412 1 32 ENDCOMMON 3 0 21412 1 33 ENDSUBENT 32 0 21412 199999 SUBENT 21412002 20211224 230621412 2 1 BIB 5 23 21412 2 2 REACTION (93-NP-237(N,F)ELEM/MASS,CUM,FY,,EPI) 21412 2 3 DECAY-DATA (39-Y-93-G,10.00HR,DG) 21412 2 4 (40-ZR-95,65.00D,DG) 21412 2 5 (40-ZR-97,17.00HR,DG) 21412 2 6 (42-MO-99,66.00HR,DG) 21412 2 7 (47-AG-111-G,7.50D,DG) 21412 2 8 (48-CD-115-G,2.30D,DG) 21412 2 9 (53-I-131,8.06D,DG) 21412 2 10 (52-TE-132,78.00HR,DG) 21412 2 11 (53-I-133-G,20.80HR,DG) 21412 2 12 (54-XE-135-G,9.20HR,DG) 21412 2 13 (57-LA-140,40.00HR,DG,1600.) 21412 2 14 (58-CE-141,32.50D,DG) 21412 2 15 (58-CE-143,33.40HR,DG) 21412 2 16 (58-CE-144,284.00D,DG) 21412 2 17 (60-ND-147,11.10D,DG) 21412 2 18 (61-PM-149,53.00HR,DG) 21412 2 19 (61-PM-151,28.40HR,DG) 21412 2 20 (62-SM-153,47.00HR,DG) 21412 2 21 MONITOR (93-NP-237(N,F)57-LA-140,CUM,FY,,SPA) 21412 2 22 STATUS (TABLE) Tbl.1 from J.Inorg.Nucl.Chem.,31(1969)3739 21412 2 23 HISTORY (20211224A) SD: SP8=SPA -> EPI in REACTION code. 21412 2 24 STATUS updated. 21412 2 25 ENDBIB 23 0 21412 2 26 COMMON 1 3 21412 2 27 MONIT 21412 2 28 PC/FIS 21412 2 29 6.35 21412 2 30 ENDCOMMON 3 0 21412 2 31 DATA 4 17 21412 2 32 ELEMENT MASS DATA DATA-ERR 21412 2 33 NO-DIM NO-DIM PC/FIS PC/FIS 21412 2 34 39. 93. 5.72 0.08 21412 2 35 40. 95. 5.70 0.12 21412 2 36 40. 97. 6.04 0.11 21412 2 37 42. 99. 6.78 0.24 21412 2 38 47. 111. 0.122 0.007 21412 2 39 48. 115. 0.053 0.003 21412 2 40 52. 132. 6.72 0.22 21412 2 41 53. 131. 3.47 0.28 21412 2 42 53. 133. 6.42 0.58 21412 2 43 54. 135. 5.35 0.13 21412 2 44 58. 141. 6.67 0.11 21412 2 45 58. 143. 5.54 0.12 21412 2 46 58. 144. 5.07 0.17 21412 2 47 60. 147. 3.21 0.15 21412 2 48 61. 149. 1.88 0.14 21412 2 49 61. 151. 1.07 0.05 21412 2 50 62. 153. 0.44 0.07 21412 2 51 ENDDATA 19 0 21412 2 52 ENDSUBENT 51 0 21412 299999 SUBENT 21412003 20211224 230621412 3 1 BIB 5 11 21412 3 2 REACTION (93-NP-237(N,F)ELEM/MASS,CUM,FY,,EPI/FCT) 21412 3 3 ANALYSIS Relative yields in table 1 were converted to absolute 21412 3 4 values by normalizing the area under the fission yield21412 3 5 curve to 200%. 21412 3 6 MONITOR (92-U-235(N,F)56-BA-140,CUM,FY) Value taken 21412 3 7 as 5.60 pc/fis, and assumed to be the same for both 21412 3 8 U-235 thermal fission and Np-237 epi-cadmium fission. 21412 3 9 STATUS (TABLE) Tbl.2 from J.Inorg.Nucl.Chem.,31(1969)3739 21412 3 10 (DEP,21412002) 21412 3 11 HISTORY (20211224A) SD: SP8=SPA -> EPI/FCT in REACTION code. 21412 3 12 STATUS updated. 21412 3 13 ENDBIB 11 0 21412 3 14 COMMON 1 3 21412 3 15 MONIT 21412 3 16 PC/FIS 21412 3 17 5.6 21412 3 18 ENDCOMMON 3 0 21412 3 19 DATA 4 17 21412 3 20 ELEMENT MASS DATA DATA-ERR 21412 3 21 NO-DIM NO-DIM PC/FIS PC/FIS 21412 3 22 39. 93. 5.15 0.07 21412 3 23 40. 95. 5.13 0.10 21412 3 24 40. 97. 5.44 0.10 21412 3 25 42. 99. 6.11 0.21 21412 3 26 47. 111. 0.11 0.006 21412 3 27 48. 115. 0.045 0.003 21412 3 28 52. 132. 5.92 0.19 21412 3 29 53. 131. 3.06 0.25 21412 3 30 53. 133. 5.66 0.51 21412 3 31 54. 135. 4.71 0.11 21412 3 32 58. 141. 5.88 0.10 21412 3 33 58. 143. 4.88 0.11 21412 3 34 58. 144. 4.47 0.15 21412 3 35 60. 147. 2.83 0.13 21412 3 36 61. 149. 1.66 0.12 21412 3 37 61. 151. 0.94 0.04 21412 3 38 62. 153. 0.39 0.04 21412 3 39 ENDDATA 19 0 21412 3 40 ENDSUBENT 39 0 21412 399999 ENDENTRY 3 0 2141299999999