ENTRY 41537 20100317 41494153700000001 SUBENT 41537001 20100317 41494153700100001 BIB 13 40 4153700100002 TITLE The investigation of scission neutron parameters from 4153700100003 N-N angular correlations. 4153700100004 AUTHOR (I.S.Guseva, A.M.Gagarskiy, V.E.Sokolov, G.V.Val'skiy, 4153700100005 G.A.Petrov, D.O.Krinitzin,D.V.Nikolaev,T.A.Zavarukhina,4153700100006 V.I.Petrova) 4153700100007 INSTITUTE (4RUSLIN) 4153700100008 REFERENCE (S,ISINN-15,266,2008) First author I.Guseva. 4153700100009 (J,IZV,72,(6),820,2008) First author A.Gagarskiy. 4153700100010 (J,BAS,72,(6),773,2008) Engl. translation of J,IZV. 4153700100011 #doi:10.3103/S1062873808060130 4153700100012 (W,Guseva,20100317) Data and comments. 4153700100013 SAMPLE Cf-252 layer on stainless steel backing of 20 mm 4153700100014 diameter, 0.2 mm thickness.Cf-252 layer spot size 4153700100015 about 5 mm, intensity about 1.E+5 fis/sec . 4153700100016 DETECTOR Two detectors , placed at 40-70 cm from Cf source 4153700100017 at variable angle between detectors and variable 4153700100018 distances. Each detector was made on the base of 4153700100019 stilbene crystal of about 60 mm diameter, 4153700100020 about 40 mm thickness and FEU Hamamatsu R1307, 4153700100021 protected by 40 mm lead and 40 mm polyethylene. 4153700100022 METHOD (PSD) Pulse shape - to split neutrons from gammas. 4153700100023 (TOF) Every TOF spectrum consists of gamma-gamma, n-n 4153700100024 and gamma-n components. 4153700100025 (COINC) N-N coincidences were used. 4153700100026 Energy scale was graduated by standard sources of Na-224153700100027 Co-60, Cs-137, Bi-207. 4153700100028 CORRECTIONS For detection efficiency decreasing at increasing of 4153700100029 distance of Cf source - detector from 40 to 70 cm, 4153700100030 at angles 20-40 degrees. 4153700100031 ASSUMED (ASSUM,98-CF-252(0,F),PR,NU) Used at MC calculations. 4153700100032 ADD-RES (COMP) Monte-Carlo predictions of n-n angular 4153700100033 distribution. 4153700100034 About (10-11)% of neutrons could be probably attribute4153700100035 to scission neutrons. 4153700100036 STATUS (PRELM) Data are preliminary. 4153700100037 (TABLE) Received 17.03.2010 from I.Guseva. 4153700100038 ERR-ANALYS (DATA-ERR) Total errors. 4153700100039 ANG-RSL - angular resolution, depends from size of 4153700100040 crystals. 4153700100041 HISTORY (20100317C) M.M. 4153700100042 ENDBIB 40 0 4153700100043 COMMON 2 3 4153700100044 ANG-RSL ASSUM 4153700100045 ADEG PRT/FIS 4153700100046 7. 3.76 4153700100047 ENDCOMMON 3 0 4153700100048 ENDSUBENT 47 0 4153700199999 SUBENT 41537002 20091204 41494153700200001 BIB 4 13 4153700200002 REACTION (98-CF-252(0,F),PR/PAR,NU/DA,,MSC) 4153700200003 Neutron-neutron angular distribution normalized to 1. 4153700200004 at 90 degrees, for different neutron energy threshold. 4153700200005 N-N coincidence count rate in arbitrary units. 4153700200006 EN-SEC (E-MIN,N) Neutron energy threshold, obtained in 4153700200007 corresponding TOF spectrum fitting., especially by 4153700200008 scopes of gamma-n component. 4153700200009 ANG-RL - angle between two neutrons. 4153700200010 STATUS (TABLE) Data received from I.Guseva. 4153700200011 Fig.6 of S,ISINN-15,266,2008. 4153700200012 Fig.7 of J,IZV,72,(6),820,2008. 4153700200013 REL-REF (N,,J.S.Pringle+,J,PRL,35,563,1975) 4153700200014 Data are compared with exp. data of J.Pringle+ . 4153700200015 ENDBIB 13 0 4153700200016 NOCOMMON 0 0 4153700200017 DATA 4 203 4153700200018 E-MIN ANG-RL DATA DATA-ERR 4153700200019 KEV ADEG ARB-UNITS ARB-UNITS 4153700200020 425. 20. 1.61026 0.03144 4153700200021 425. 22.5 1.54847 0.0362 4153700200022 425. 25. 1.62305 0.03315 4153700200023 425. 27.5 1.49963 0.04038 4153700200024 425. 30. 1.43134 0.0338 4153700200025 425. 32.5 1.45982 0.04034 4153700200026 425. 36.25 1.34203 0.02985 4153700200027 425. 40. 1.26707 0.01975 4153700200028 425. 42.5 1.3047 0.0323 4153700200029 425. 45. 1.21959 0.02134 4153700200030 425. 50. 1.18863 0.02121 4153700200031 425. 55. 1.2112 0.02333 4153700200032 425. 60. 1.0856 0.01871 4153700200033 425. 63.75 1.06956 0.01911 4153700200034 425. 70. 1.0153 0.02238 4153700200035 425. 75. 1.00709 0.02424 4153700200036 425. 82.5 0.99654 0.01666 4153700200037 425. 90. 0.98932 0.01731 4153700200038 425. 95. 1.01497 0.01843 4153700200039 425. 100. 1.0061 0.02045 4153700200040 425. 105. 1.1004 0.04006 4153700200041 425. 110. 1.09291 0.01884 4153700200042 425. 115. 1.12852 0.02427 4153700200043 425. 120. 1.1995 0.02441 4153700200044 425. 127.5 1.28704 0.02233 4153700200045 425. 135. 1.38943 0.0276 4153700200046 425. 140. 1.37991 0.02347 4153700200047 425. 145. 1.5013 0.05049 4153700200048 425. 150. 1.51773 0.02974 4153700200049 425. 155. 1.53323 0.02628 4153700200050 425. 160. 1.59751 0.02993 4153700200051 425. 165. 1.63204 0.02713 4153700200052 425. 167.5 1.62703 0.03356 4153700200053 425. 170. 1.64548 0.02934 4153700200054 425. 173.75 1.69618 0.02737 4153700200055 425. 177.5 1.66185 0.03774 4153700200056 425. 180. 1.69524 0.02773 4153700200057 550. 20. 1.66825 0.03477 4153700200058 550. 22.5 1.6021 0.04112 4153700200059 550. 25. 1.64679 0.03653 4153700200060 550. 27.5 1.55933 0.04679 4153700200061 550. 30. 1.44342 0.03798 4153700200062 550. 32.5 1.49693 0.04633 4153700200063 550. 36.25 1.37544 0.03346 4153700200064 550. 40. 1.25861 0.01987 4153700200065 550. 42.5 1.31633 0.03589 4153700200066 550. 45. 1.22446 0.02238 4153700200067 550. 50. 1.18731 0.0223 4153700200068 550. 55. 1.18419 0.0243 4153700200069 550. 60. 1.09187 0.01959 4153700200070 550. 63.75 1.052 0.01988 4153700200071 550. 70. 1.02273 0.02454 4153700200072 550. 75. 1.01125 0.02685 4153700200073 550. 82.5 0.98112 0.01697 4153700200074 550. 90. 1.00738 0.01835 4153700200075 550. 95. 1.00633 0.0192 4153700200076 550. 100. 1.01892 0.02227 4153700200077 550. 105. 1.04595 0.0433 4153700200078 550. 110. 1.08924 0.01953 4153700200079 550. 115. 1.11208 0.02607 4153700200080 550. 120. 1.1849 0.02604 4153700200081 550. 127.5 1.28817 0.02333 4153700200082 550. 135. 1.36173 0.02906 4153700200083 550. 140. 1.40204 0.02466 4153700200084 550. 147.5 1.55759 0.03135 4153700200085 550. 155. 1.58116 0.02798 4153700200086 550. 160. 1.64749 0.03253 4153700200087 550. 165. 1.6955 0.02893 4153700200088 550. 167.5 1.70638 0.03731 4153700200089 550. 170. 1.7092 0.03173 4153700200090 550. 173.75 1.74012 0.02863 4153700200091 550. 177.5 1.68961 0.04181 4153700200092 550. 180. 1.74499 0.0292 4153700200093 750. 20. 1.79927 0.05799 4153700200094 750. 25. 1.6527 0.04927 4153700200095 750. 30. 1.56938 0.04968 4153700200096 750. 40. 1.36233 0.02542 4153700200097 750. 45. 1.28701 0.02791 4153700200098 750. 50. 1.24253 0.02523 4153700200099 750. 55. 1.14551 0.02378 4153700200100 750. 60. 1.11309 0.02707 4153700200101 750. 70. 1.02253 0.01969 4153700200102 750. 80. 1.00079 0.01899 4153700200103 750. 90. 0.96487 0.01763 4153700200104 750. 100. 0.99166 0.02257 4153700200105 750. 110. 1.07796 0.02264 4153700200106 750. 120. 1.208 0.02893 4153700200107 750. 130. 1.29526 0.03014 4153700200108 750. 140. 1.44883 0.02977 4153700200109 750. 145. 1.53126 0.0318 4153700200110 750. 150. 1.63749 0.02939 4153700200111 750. 160. 1.70433 0.02833 4153700200112 750. 165. 1.79279 0.03414 4153700200113 750. 170. 1.8421 0.03259 4153700200114 750. 175. 1.92065 0.03822 4153700200115 750. 180. 1.85922 0.0349 4153700200116 800. 20. 1.84865 0.04536 4153700200117 800. 22.5 1.69316 0.05371 4153700200118 800. 25. 1.76572 0.04713 4153700200119 800. 27.5 1.76083 0.06638 4153700200120 800. 31.25 1.55582 0.04291 4153700200121 800. 36.25 1.47317 0.04491 4153700200122 800. 40. 1.34305 0.02207 4153700200123 800. 42.5 1.34002 0.04747 4153700200124 800. 45. 1.31476 0.02715 4153700200125 800. 50. 1.22563 0.02652 4153700200126 800. 55. 1.24471 0.03064 4153700200127 800. 60. 1.12695 0.02286 4153700200128 800. 63.75 1.11946 0.02444 4153700200129 800. 70. 1.05167 0.03146 4153700200130 800. 75. 1.01908 0.03476 4153700200131 800. 82.5 0.99594 0.0192 4153700200132 800. 90. 0.98662 0.02081 4153700200133 800. 95. 1.02272 0.02283 4153700200134 800. 100. 1.05684 0.02806 4153700200135 800. 105. 1.06545 0.06041 4153700200136 800. 110. 1.11663 0.02271 4153700200137 800. 115. 1.1319 0.0335 4153700200138 800. 120. 1.23006 0.03304 4153700200139 800. 127.5 1.384 0.02833 4153700200140 800. 135. 1.467 0.03742 4153700200141 800. 140. 1.5182 0.0296 4153700200142 800. 147.5 1.67403 0.0397 4153700200143 800. 155. 1.72853 0.03393 4153700200144 800. 160. 1.79084 0.04102 4153700200145 800. 165. 1.88316 0.03487 4153700200146 800. 167.5 1.89683 0.04942 4153700200147 800. 170. 1.87783 0.03951 4153700200148 800. 173.75 1.93776 0.03398 4153700200149 800. 177.5 1.86362 0.05713 4153700200150 800. 180. 1.93871 0.03486 4153700200151 1200. 20. 2.03123 0.07111 4153700200152 1200. 23.75 1.91896 0.06181 4153700200153 1200. 27.5 2.00435 0.12043 4153700200154 1200. 31.25 1.84078 0.07244 4153700200155 1200. 35. 1.77034 0.11928 4153700200156 1200. 37.5 1.55148 0.0973 4153700200157 1200. 40. 1.45416 0.02723 4153700200158 1200. 42.5 1.55083 0.08489 4153700200159 1200. 45. 1.49418 0.04108 4153700200160 1200. 50. 1.37491 0.04105 4153700200161 1200. 55. 1.29774 0.04686 4153700200162 1200. 60. 1.15293 0.03231 4153700200163 1200. 62.5 1.05907 0.10273 4153700200164 1200. 65. 1.15762 0.03671 4153700200165 1200. 70. 1.08793 0.05082 4153700200166 1200. 75. 0.99242 0.05597 4153700200167 1200. 82.5 1.0044 0.02572 4153700200168 1200. 90. 0.97305 0.02914 4153700200169 1200. 95. 1.04148 0.03329 4153700200170 1200. 100. 1.05869 0.04292 4153700200171 1200. 105. 1.02748 0.1017 4153700200172 1200. 110. 1.17668 0.03233 4153700200173 1200. 115. 1.15447 0.05368 4153700200174 1200. 120. 1.30976 0.05178 4153700200175 1200. 127.5 1.43052 0.03996 4153700200176 1200. 135. 1.48391 0.05776 4153700200177 1200. 140. 1.66317 0.04227 4153700200178 1200. 147.5 1.89594 0.06271 4153700200179 1200. 155. 1.94341 0.04964 4153700200180 1200. 160. 2.06833 0.06528 4153700200181 1200. 165. 2.15598 0.0497 4153700200182 1200. 167.5 2.17623 0.08125 4153700200183 1200. 170. 2.13006 0.05947 4153700200184 1200. 173.75 2.18599 0.04588 4153700200185 1200. 177.5 2.1594 0.09721 4153700200186 1200. 180. 2.26551 0.04932 4153700200187 1600. 20. 2.20465 0.10988 4153700200188 1600. 22.5 2.00661 0.13888 4153700200189 1600. 25. 2.11704 0.12114 4153700200190 1600. 27.5 2.1713 0.19607 4153700200191 1600. 30. 2.06741 0.15055 4153700200192 1600. 35. 1.81601 0.10745 4153700200193 1600. 40. 1.59345 0.03619 4153700200194 1600. 42.5 1.55584 0.1317 4153700200195 1600. 45. 1.58071 0.06085 4153700200196 1600. 50. 1.47308 0.0616 4153700200197 1600. 55. 1.40434 0.07422 4153700200198 1600. 60. 1.19516 0.04766 4153700200199 1600. 62.5 1.12492 0.16484 4153700200200 1600. 65. 1.06792 0.05264 4153700200201 1600. 70. 1.05438 0.10294 4153700200202 1600. 75. 1.03679 0.08864 4153700200203 1600. 82.5 1.01567 0.03657 4153700200204 1600. 90. 0.92669 0.04149 4153700200205 1600. 95. 1.06036 0.04968 4153700200206 1600. 100. 1.07785 0.06623 4153700200207 1600. 105. 1.00011 0.15497 4153700200208 1600. 110. 1.15072 0.04578 4153700200209 1600. 115. 1.13545 0.0826 4153700200210 1600. 120. 1.30149 0.07818 4153700200211 1600. 127.5 1.4089 0.05623 4153700200212 1600. 135. 1.47538 0.0884 4153700200213 1600. 140. 1.71117 0.0606 4153700200214 1600. 147.5 1.93484 0.09429 4153700200215 1600. 155. 2.06303 0.07247 4153700200216 1600. 160. 2.19576 0.09948 4153700200217 1600. 165. 2.37326 0.07238 4153700200218 1600. 167.5 2.54338 0.13373 4153700200219 1600. 170. 2.3749 0.09074 4153700200220 1600. 173.75 2.38613 0.06481 4153700200221 1600. 177.5 2.33321 0.15197 4153700200222 1600. 180. 2.49232 0.07038 4153700200223 ENDDATA 205 0 4153700200224 ENDSUBENT 223 0 4153700299999 ENDENTRY 2 0 4153799999999