ENTRY 33035 20110609 31513303500000001 SUBENT 33035001 20110609 31513303500100001 BIB 10 44 3303500100002 TITLE Prompt neutron emission spectra and multiplicities in 3303500100003 thermal neutron inducted fission of U-235 3303500100004 AUTHOR (M.S.Samant, R.P.Anand, R.K.Choudhury, S.S.Kapoor, 3303500100005 K.Kumar, D.M.Nadkarni, A.Saxena) 3303500100006 INSTITUTE (3INDTRM) Nuclear Physics Division 3303500100007 REFERENCE (J,PRM,40,(4),299,1993) 3303500100008 FACILITY (REAC,3INDTRM) CIRUS reactor 3303500100009 SAMPLE 100 mu-g/cm2 electro-deposited on 160 mu-g/cm2 Ni 3303500100010 backing 3303500100011 DETECTOR (SCIN) Used in the 1st experiment: 3303500100012 A 5 cm x 5 cm NE213 scintillation neutron detector 3303500100013 was placed collinear to the two fragment detectors at 3303500100014 a distance of 66.8 cm from the 235-U target. 3303500100015 The neutron detector was well shielded with 7 cm of 3303500100016 lead surrounded by 50 cm of borated paraffin in a 3303500100017 cylindrical geometry to reduce the background. 3303500100018 (SIBAR) Used in the 1st experiment: 3303500100019 The surface barrier detectors were located at 3303500100020 2.5 cm x 3.5 cm on either side of the target, which 3303500100021 ensured that both the fragments were detected in 3303500100022 coincidence without any bias due to loss of 3303500100023 collinearity of the two fragments from the extended 3303500100024 source and due to neutron emission effects. 3303500100025 (IOCH) Used in the 2nd experiment: 3303500100026 A back to back gridded ionization chamber was used to 3303500100027 measure the energy and angle of both the fission 3303500100028 fragments. 3303500100029 The chamber consisted of a central cathode and two 3303500100030 parallel plate ionization chambers with frisch grids 3303500100031 in a back to back geometry. 3303500100032 The distance between the anode and the grid was 0.7 cm 3303500100033 and between the cathode and grid it was 3.0 cm. 3303500100034 METHOD (TOF) The neutron time of flight was derived with the 3303500100035 start signal taken from the common cathode of the 3303500100036 ion-chamber and the stop signal taken from the 3303500100037 neutron detector. 3303500100038 The pulse heights of the signals from the collectors, 3303500100039 the grids, the pulse shape and energy signals of the 3303500100040 neutron detector and neutron time of flight were 3303500100041 recorded in list mode for further offline analysis. 3303500100042 (COINC) Two fission fragments detected in coincidence 3303500100043 ADD-RES (N-SPC) Neutron c.m spectra for fragment mass groups 3303500100044 HISTORY (20110405C) Y.Santhi sheela Manipal University, Manipal3303500100045 (20110609A) On. Finalized 3303500100046 ENDBIB 44 0 3303500100047 NOCOMMON 0 0 3303500100048 ENDSUBENT 47 0 3303500199999 SUBENT 33035002 20110609 31513303500200001 BIB 4 8 3303500200002 REACTION (92-U-235(N,F)MASS,PR,NU,,MSC) 3303500200003 Neutron multiplicity as the function of total kinetic 3303500200004 energy for typical fragment masses 3303500200005 EN-SEC (E,LF+HF) Total kinetic energy 3303500200006 ERR-ANALYS (E-ERR-DIG) Digitizing error 3303500200007 (ERR-DIG) Digitizing error 3303500200008 (DATA-ERR) No information on source of uncertainty 3303500200009 STATUS (CURVE) Fig.4 of Pramana 40(1993)299 3303500200010 ENDBIB 8 0 3303500200011 COMMON 3 3 3303500200012 EN-DUMMY E-ERR-DIG ERR-DIG 3303500200013 EV MEV PRT/FIS 3303500200014 0.0253 0.1 0.01 3303500200015 ENDCOMMON 3 0 3303500200016 DATA 5 104 3303500200017 MASS-MIN MASS-MAX E DATA DATA-ERR 3303500200018 NO-DIM NO-DIM MEV PRT/FIS PRT/FIS 3303500200019 86. 87. 145.0 1.82 0.16 3303500200020 86. 87. 150.2 1.68 0.11 3303500200021 86. 87. 155.0 1.34 0.11 3303500200022 86. 87. 160.2 1.20 0.11 3303500200023 86. 87. 165.1 1.04 0.16 3303500200024 86. 87. 170.3 0.86 0.23 3303500200025 90. 91. 145.1 1.84 0.30 3303500200026 90. 91. 149.8 1.88 0.23 3303500200027 90. 91. 155.1 1.82 0.15 3303500200028 90. 91. 159.7 1.61 0.11 3303500200029 90. 91. 165.1 1.46 0.13 3303500200030 90. 91. 170.0 1.27 0.11 3303500200031 90. 91. 175.0 0.94 0.24 3303500200032 90. 91. 180.0 0.66 0.21 3303500200033 94. 95. 145.3 2.36 0.14 3303500200034 94. 95. 150.8 2.44 0.16 3303500200035 94. 95. 155.1 2.26 0.18 3303500200036 94. 95. 160.2 2.06 0.10 3303500200037 94. 95. 165.3 1.87 0.14 3303500200038 94. 95. 170.0 1.65 0.14 3303500200039 94. 95. 175.1 1.37 0.12 3303500200040 94. 95. 180.1 1.05 0.14 3303500200041 94. 95. 184.8 0.63 0.14 3303500200042 98. 99. 145.4 2.60 0.11 3303500200043 98. 99. 150.5 2.42 0.11 3303500200044 98. 99. 155.3 2.29 0.11 3303500200045 98. 99. 160.0 2.07 0.13 3303500200046 98. 99. 165.1 1.86 0.09 3303500200047 98. 99. 170.2 1.66 0.11 3303500200048 98. 99. 174.9 1.39 0.13 3303500200049 98. 99. 180.0 1.14 0.13 3303500200050 98. 99. 185.4 0.90 0.11 3303500200051 98. 99. 190.5 0.65 0.13 3303500200052 102. 103. 145.0 2.61 0.21 3303500200053 102. 103. 150.2 2.59 0.14 3303500200054 102. 103. 155.1 2.45 0.11 3303500200055 102. 103. 160.3 2.25 0.12 3303500200056 102. 103. 165.5 2.07 0.12 3303500200057 102. 103. 170.6 1.82 0.12 3303500200058 102. 103. 175.8 1.52 0.12 3303500200059 102. 103. 180.3 1.33 0.12 3303500200060 102. 103. 185.5 1.08 0.14 3303500200061 102. 103. 190.0 0.81 0.14 3303500200062 106. 107. 145.3 2.36 0.14 3303500200063 106. 107. 150.8 2.44 0.16 3303500200064 106. 107. 155.1 2.26 0.18 3303500200065 106. 107. 160.2 2.06 0.10 3303500200066 106. 107. 165.3 1.87 0.14 3303500200067 106. 107. 170.0 1.65 0.14 3303500200068 106. 107. 175.1 1.37 0.12 3303500200069 106. 107. 180.1 1.05 0.14 3303500200070 106. 107. 184.8 0.63 0.14 3303500200071 130. 131. 144.8 1.21 0.23 3303500200072 130. 131. 150.3 1.19 0.23 3303500200073 130. 131. 155.0 1.26 0.25 3303500200074 130. 131. 160.2 1.01 0.18 3303500200075 130. 131. 164.9 0.91 0.14 3303500200076 130. 131. 170.0 0.62 0.20 3303500200077 130. 131. 175.2 0.53 0.12 3303500200078 130. 131. 179.9 0.41 0.12 3303500200079 130. 131. 185.0 0.35 0.12 3303500200080 130. 131. 190.2 0.27 0.11 3303500200081 134. 135. 145.3 1.56 0.16 3303500200082 134. 135. 150.0 1.36 0.14 3303500200083 134. 135. 155.0 1.31 0.14 3303500200084 134. 135. 159.7 1.19 0.12 3303500200085 134. 135. 164.7 1.10 0.11 3303500200086 134. 135. 169.8 0.94 0.11 3303500200087 134. 135. 174.8 0.80 0.12 3303500200088 134. 135. 179.8 0.71 0.12 3303500200089 134. 135. 184.8 0.61 0.11 3303500200090 134. 135. 190.2 0.56 0.11 3303500200091 138. 139. 144.8 1.73 0.12 3303500200092 138. 139. 149.7 1.52 0.12 3303500200093 138. 139. 154.9 1.38 0.10 3303500200094 138. 139. 160.2 1.22 0.10 3303500200095 138. 139. 165.0 1.11 0.09 3303500200096 138. 139. 170.3 1.02 0.09 3303500200097 138. 139. 175.2 0.93 0.09 3303500200098 138. 139. 180.1 0.86 0.12 3303500200099 138. 139. 184.9 0.77 0.10 3303500200100 142. 143. 144.7 1.90 0.24 3303500200101 142. 143. 149.6 1.57 0.16 3303500200102 142. 143. 154.9 1.45 0.16 3303500200103 142. 143. 159.9 1.27 0.12 3303500200104 142. 143. 164.9 1.15 0.14 3303500200105 142. 143. 169.8 0.98 0.09 3303500200106 142. 143. 174.8 0.89 0.10 3303500200107 142. 143. 180.1 0.82 0.10 3303500200108 142. 143. 185.4 0.75 0.12 3303500200109 146. 147. 145.0 1.77 0.21 3303500200110 146. 147. 150.0 1.63 0.19 3303500200111 146. 147. 154.7 1.42 0.14 3303500200112 146. 147. 160.2 1.23 0.14 3303500200113 146. 147. 164.9 1.07 0.14 3303500200114 146. 147. 170.0 0.95 0.14 3303500200115 146. 147. 175.4 0.93 0.16 3303500200116 146. 147. 180.1 0.84 0.12 3303500200117 150. 151. 146.0 1.62 0.19 3303500200118 150. 151. 150.7 1.60 0.16 3303500200119 150. 151. 155.3 1.39 0.11 3303500200120 150. 151. 159.6 1.25 0.14 3303500200121 150. 151. 165.0 1.11 0.16 3303500200122 150. 151. 170.3 1.04 0.21 3303500200123 ENDDATA 106 0 3303500200124 ENDSUBENT 123 0 3303500299999 ENDENTRY 2 0 3303599999999