ENTRY 33014 20080826 31303301400000001 SUBENT 33014001 20080826 31303301400100001 BIB 12 44 3301400100002 TITLE Mass yields in 229-Th(n,f) 3301400100003 AUTHOR (C.Agarwal,A.Goswami,P.C.Kalsi,S.Singh,A.Mhatre, 3301400100004 A.Ramaswami) 3301400100005 INSTITUTE (3INDTRM) 3301400100006 REFERENCE (J,JRN,275,445,2008) 3301400100007 FACILITY (REAC,3INDTRM) 3301400100008 SAMPLE 229-Th used in this work was obtained by milking of 3301400100009 sample of 233-U. The stock was sufficiently old so 3301400100010 that 228-Th (half life~1.9 year)practically 3301400100011 decayed. The target 229-Th(~10 micro gram)was made by 3301400100012 electro deposition from an aqueous 0.001 M nitric acid3301400100013 solution on a 6.75 mg/cm*2 super pure aluminium foil. 3301400100014 Amount of 229-Th in each target was determined from 3301400100015 the electro deposition efficiency. 3301400100016 DETECTOR (TRD,HPGE) In order to determine the absolute 3301400100017 yields of the fission products, a lexan track 3301400100018 detector was taken in dilute solution of known 3301400100019 concentration of 229-Th in a sealed polypropylene tube.3301400100020 HPGe detector connected to a PC based 4K MCA was used 3301400100021 for gamma ray counting of fission products. 3301400100022 METHOD (ABSFY,GSPEC) 3301400100023 Cumulative yields of 27 fission products have been 3301400100024 determined in 229-Th(n,f) by using recoil cather 3301400100025 technique follwed by gama ray spectrometry. 3301400100026 Absolute fission tields were arrived at from the 3301400100027 fission rate measured by track etch counting method. 3301400100028 ANALYSIS The activities of different radionuclides at 3301400100029 the end of irradiation were calculated from the peak 3301400100030 areas of their characteristics gamma rays after 3301400100031 correcting for the detection efficiency, gamma ray 3301400100032 abundance and cooling times. 3301400100033 The cumulative yield of the fission products were 3301400100034 calculated from the gamma ray activity at the end of 3301400100035 irradiation using the standard activation equation. 3301400100036 ERR-ANALYS (ERR-S)Errors given on the yields are due to counting 3301400100037 statistics only. 3301400100038 STATUS (APRVD) Entry approved by Dr. Sarbjit Singh 3301400100039 HISTORY (20080408C) 3301400100040 Compiled by Paresh Prajpati from The M.S.University of 3301400100041 Baroda, Dr. Sarbjit Singh and Dr. H. Naik from 3301400100042 Radiochemistry Division, B.A.R.C 3301400100043 (20080826A) SD,NO. Energy changed from 0.5eV to 1.9MeV 3301400100044 and put in subent 001, in Subent 002,003 added FIS in 3301400100045 reaction code and delete EN. 3301400100046 ENDBIB 44 0 3301400100047 COMMON 1 3 3301400100048 EN 3301400100049 MEV 3301400100050 1.9 3301400100051 ENDCOMMON 3 0 3301400100052 ENDSUBENT 51 0 3301400199999 SUBENT 33014002 20080826 31303301400200001 BIB 2 3 3301400200002 REACTION (90-TH-229(N,F)MASS,CHN,FY,,FIS) 3301400200003 STATUS (TABLE) Data is taken from table 3 of the paper 3301400200004 Mass yields (in %) 3301400200005 ENDBIB 3 0 3301400200006 NOCOMMON 0 0 3301400200007 DATA 3 27 3301400200008 MASS DATA ERR-S 3301400200009 NO-DIM PC/FIS PC/FIS 3301400200010 83. 5.62 0.18 3301400200011 84. 10.19 0.25 3301400200012 85. 10.43 0.09 3301400200013 87. 7.78 0.25 3301400200014 88. 9.27 0.58 3301400200015 89. 9.35 0.27 3301400200016 91. 7.05 0.22 3301400200017 92. 6.55 0.33 3301400200018 93. 5.38 0.19 3301400200019 94. 3.2 0.08 3301400200020 95. 2.87 0.37 3301400200021 97. 0.94 0.02 3301400200022 99. 0.27 0.02 3301400200023 103. 0.08 0.01 3301400200024 131. 0.67 0.05 3301400200025 132. 1.59 0.09 3301400200026 133. 3.32 0.07 3301400200027 134. 6.03 0.09 3301400200028 135. 6.07 0.21 3301400200029 138. 7.05 0.28 3301400200030 139. 10.98 0.32 3301400200031 140. 8.24 0.20 3301400200032 141. 7.6 0.23 3301400200033 143. 8.72 0.08 3301400200034 144. 10.64 0.31 3301400200035 146. 2.99 0.46 3301400200036 147. 2.68 0.27 3301400200037 ENDDATA 29 0 3301400200038 ENDSUBENT 37 0 3301400299999 SUBENT 33014003 20080826 31303301400300001 BIB 2 3 3301400300002 REACTION (90-TH-229(N,F)ELEM/MASS,CUM,FY,,FIS) 3301400300003 STATUS (TABLE) Data is taken from table 2. Cumulative yields 3301400300004 determined in the present work 3301400300005 ENDBIB 3 0 3301400300006 NOCOMMON 0 0 3301400300007 DATA 4 27 3301400300008 ELEMENT MASS DATA ERR-S 3301400300009 NO-DIM NO-DIM PC/FIS PC/FIS 3301400300010 34. 83. 5.25 0.12 3301400300011 35. 84. 10.18 0.18 3301400300012 36. 85. 10.42 0.05 3301400300013 36. 87. 7.58 0.17 3301400300014 36. 88. 8.45 0.3 3301400300015 37. 89. 9.35 0.23 3301400300016 38. 91. 7.03 0.13 3301400300017 38. 92. 6.23 0.18 3301400300018 39. 93. 5.37 0.11 3301400300019 39. 94. 3.19 0.06 3301400300020 40. 95. 2.87 0.36 3301400300021 40. 97. 0.9 0.01 3301400300022 42. 99. 0.27 0.01 3301400300023 44. 103. 0.08 0.01 3301400300024 52. 132. 1.5 0.05 3301400300025 52. 134. 5.11 0.05 3301400300026 53. 131. 0.67 0.03 3301400300027 53. 133. 3.31 0.04 3301400300028 53. 135. 5.95 0.12 3301400300029 54. 138. 7.04 0.19 3301400300030 56. 139. 10.97 0.23 3301400300031 56. 140. 8.25 0.11 3301400300032 58. 141. 7.6 0.13 3301400300033 58. 143. 8.71 0.04 3301400300034 58. 144. 10.64 0.31 3301400300035 58. 146. 2.88 0.32 3301400300036 60. 147. 2.68 0.27 3301400300037 ENDDATA 29 0 3301400300038 ENDSUBENT 37 0 3301400399999 ENDENTRY 3 0 3301499999999