ENTRY 41689 20200622 418841689 0 1 SUBENT 41689001 20200622 418841689 1 1 BIB 10 71 41689 1 2 INSTITUTE (4RUSFEI) 41689 1 3 REFERENCE (J,YF,25,723,1977) Issue 4. Figures only. 41689 1 4 (J,SNP,25,385,1977) Engl.transl.of YF,25,723,1977 41689 1 5 AUTHOR (V.M.Piksaykin,P.P.Dyachenko,L.S.Kutsaeva) 41689 1 6 TITLE Number and spectra of neutrons for fixed fragments at 41689 1 7 spontaneous fission of 252Cf 41689 1 8 SAMPLE Layer of Cf-252,diameter 7.mm, activity 1.E+5 fis/sec,41689 1 9 on Al backing of 30 mug/cm2 thickness. Weight 1.5 mug. 41689 1 10 METHOD (COINC) Cyclic measurements with coincidence: 41689 1 11 fission fragment-neutron (calibration) - 41689 1 12 3.28E+5 coincidences at 1st series, 41689 1 13 1.43E+5 coincidences at 2nd series, 41689 1 14 fission fragment-fission fragment - 41689 1 15 1.80E+5 coincidences at 1st series, 41689 1 16 1.47E+5 coincidences at 2nd series, 41689 1 17 fission fragment-fission fragment-neutron- 41689 1 18 1.02E+6 coincidences at 1st series, 41689 1 19 6.00E+5 coincidences at 2nd series. 41689 1 20 DETECTOR (SIBAR) Two Si surface-barrier detectors of 2 cm 41689 1 21 diameter - for FF registration. 41689 1 22 (SCIN) Stilbene crystal with FEU-13 photomultiplier, 41689 1 23 placed at 50 cm distance from sample - for neutrons. 41689 1 24 Neutron detector was placed: 41689 1 25 1st series - at 8.7 deg angle between neutron and 41689 1 26 fission fragment motion, measurement time 200 hr; 41689 1 27 2nd series - 90 deg angle between neutron and fission 41689 1 28 fragment motion, measurement time 550 hr. 41689 1 29 . Detection efficiency was measured by standard Cf-252 41689 1 30 source (3.E+3 n/sec). 41689 1 31 ASSUMED (ASSUM,98-CF-252(0,F),PR,NU) 41689 1 32 Nu=3.76 prt/fis and T=1.43 MeV 41689 1 33 were used as parameters of Maxwellian spectrum 41689 1 34 for calibration purpose. 41689 1 35 ADD-RES Data of Fig.3 of Yad.Fiz.,v.25,p.723,1977 were 41689 1 36 digitized: 41689 1 37 TKE,MeV KEn,MeV Stat.err,MeV 41689 1 38 156.25 1.302 0.119 41689 1 39 160.15 1.329 0.123 41689 1 40 164.32 1.418 41689 1 41 168.23 1.467 41689 1 42 172.23 1.432 41689 1 43 176.41 1.499 41689 1 44 180.41 1.491 41689 1 45 184.23 1.514 0.092 41689 1 46 188.32 1.427 41689 1 47 192.33 1.366 41689 1 48 196.51 1.354 41689 1 49 200.42 1.324 41689 1 50 204.51 1.333 41689 1 51 208.53 1.044 0.101 41689 1 52 212.53 1.027 0.127 41689 1 53 These data were compared with data of 41689 1 54 H.Bowman+,J,PR,126,2120,1962, EXFOR 14065001. 41689 1 55 ------ 41689 1 56 TKE,MeV KE isotropic component,MeV 41689 1 57 156.14 1.451 +- 0.079 41689 1 58 160.13 1.597 +- 0.070 41689 1 59 164.13 1.673 +- 41689 1 60 168.21 1.717 +- 41689 1 61 172.30 1.744 +- 41689 1 62 176.31 1.631 +- 41689 1 63 180.31 1.658 +- 41689 1 64 184.31 1.619 +- 0.088 41689 1 65 188.31 1.572 +- 41689 1 66 192.49 1.559 +- 41689 1 67 196.41 1.490 +- 41689 1 68 200.41 1.460 +- 41689 1 69 204.51 1.368 +- 41689 1 70 207.53 1.373 +- 0.092 41689 1 71 212.60 1.247 +- 0.070 41689 1 72 HISTORY (20200622C) M.M. 41689 1 73 ENDBIB 71 0 41689 1 74 COMMON 1 3 41689 1 75 ASSUM 41689 1 76 PRT/FIS 41689 1 77 3.76 41689 1 78 ENDCOMMON 3 0 41689 1 79 ENDSUBENT 78 0 41689 199999 SUBENT 41689002 20200622 418841689 2 1 BIB 5 24 41689 2 2 REACTION (98-CF-252(0,F),PR,NU/DE,,RRE/REL) 41689 2 3 N(E)/sqrt(E) 41689 2 4 REL-REF (A,40472003,G.V.Kotel'nikova+,R,FEI-575,1975) 41689 2 5 (A,,G.C.Hanna+,J,REA,74,3,1969) 41689 2 6 ADD-RES E,MeV Isotropic component (digitized): 41689 2 7 0.710 8.50E+04 41689 2 8 0.921 7.97E+04 41689 2 9 1.167 7.00E+04 41689 2 10 1.379 5.49E+04 41689 2 11 1.556 4.17E+04 41689 2 12 1.767 3.38E+04 41689 2 13 1.944 2.65E+04 41689 2 14 2.121 2.02E+04 41689 2 15 2.333 1.53E+04 41689 2 16 2.544 1.26E+04 41689 2 17 2.720 1.09E+04 41689 2 18 2.932 8.56E+03 41689 2 19 3.143 6.94E+03 41689 2 20 3.320 5.02E+03 41689 2 21 3.497 3.88E+03 41689 2 22 3.709 2.80E+03 41689 2 23 ERR-ANALYS Quantization error ( 1/2 pixel): 41689 2 24 scale X - 0.018 MeV, scale Y - 0.35 %. 41689 2 25 STATUS (CURVE) Fig.1 of Yad.Fiz.,v.25,p.723,1977 41689 2 26 ENDBIB 24 0 41689 2 27 COMMON 2 3 41689 2 28 E-ERR-DIG ERR-DIG 41689 2 29 MEV PER-CENT 41689 2 30 0.013 0.80 41689 2 31 ENDCOMMON 3 0 41689 2 32 DATA 2 55 41689 2 33 E DATA 41689 2 34 MEV ARB-UNITS 41689 2 35 0.705 2.55E+05 41689 2 36 0.916 2.36E+05 41689 2 37 1.127 2.07E+05 41689 2 38 1.338 1.82E+05 41689 2 39 1.550 1.55E+05 41689 2 40 1.726 1.32E+05 41689 2 41 1.937 1.14E+05 41689 2 42 2.113 9.69E+04 41689 2 43 2.289 8.24E+04 41689 2 44 2.536 7.01E+04 41689 2 45 2.712 6.06E+04 41689 2 46 2.888 5.08E+04 41689 2 47 3.135 4.32E+04 41689 2 48 3.311 3.73E+04 41689 2 49 3.522 3.13E+04 41689 2 50 3.768 2.75E+04 41689 2 51 3.909 2.34E+04 41689 2 52 4.121 2.02E+04 41689 2 53 4.332 1.72E+04 41689 2 54 4.508 1.49E+04 41689 2 55 4.719 1.29E+04 41689 2 56 4.895 1.13E+04 41689 2 57 5.107 9.45E+03 41689 2 58 5.318 8.04E+03 41689 2 59 5.494 7.07E+03 41689 2 60 5.670 6.11E+03 41689 2 61 5.917 5.28E+03 41689 2 62 6.093 4.50E+03 41689 2 63 6.269 3.89E+03 41689 2 64 6.480 3.36E+03 41689 2 65 6.691 3.00E+03 41689 2 66 6.867 2.60E+03 41689 2 67 7.079 2.17E+03 41689 2 68 7.255 1.88E+03 41689 2 69 7.466 1.65E+03 41689 2 70 7.642 1.47E+03 41689 2 71 7.853 1.25E+03 41689 2 72 8.065 1.09E+03 41689 2 73 8.276 9.38E+02 41689 2 74 8.452 8.24E+02 41689 2 75 8.663 7.24E+02 41689 2 76 8.839 6.16E+02 41689 2 77 9.050 5.50E+02 41689 2 78 9.226 4.84E+02 41689 2 79 9.438 4.18E+02 41689 2 80 9.649 3.73E+02 41689 2 81 9.860 3.28E+02 41689 2 82 10.036 2.84E+02 41689 2 83 10.247 2.49E+02 41689 2 84 10.388 2.16E+02 41689 2 85 10.599 1.89E+02 41689 2 86 10.880 1.69E+02 41689 2 87 11.092 1.46E+02 41689 2 88 11.303 1.27E+02 41689 2 89 11.479 1.11E+02 41689 2 90 ENDDATA 57 0 41689 2 91 ENDSUBENT 90 0 41689 299999 SUBENT 41689003 20200622 418841689 3 1 BIB 3 6 41689 3 2 REACTION 1(98-CF-252(0,F),PR,NU) 41689 3 3 2(98-CF-252(0,F),PR,KEM) 41689 3 4 ADD-RES Isotropic component is fitted by Maxwellian 41689 3 5 distribution by =0.78 n/fis, T=1.01 MeV. 41689 3 6 STATUS (TABLE) Text page 726 of Yad.Fiz.,v.25,p.723,1977 41689 3 7 (DEP,41689002) Measured spectrum 41689 3 8 ENDBIB 6 0 41689 3 9 NOCOMMON 0 0 3 41689 3 10 DATA 2 1 41689 3 11 DATA 1DATA 2 41689 3 12 PRT/FIS MEV 41689 3 13 3.92 1.35 41689 3 14 ENDDATA 3 0 41689 3 15 ENDSUBENT 14 0 41689 399999 SUBENT 41689004 20200622 418841689 4 1 BIB 5 28 41689 4 2 REACTION (98-CF-252(0,F)MASS,PRE/PR,NU) 41689 4 3 REL-REF (N,14065001,H.R.Bowman+,J,PR,126,2120,1962) 41689 4 4 Data used for comparison 41689 4 5 (N,,H.Nifenecker+,C,73ROCH,2,117,1973) STI/PUB/347 41689 4 6 Data used for comparison 41689 4 7 ADD-RES MASS,a.m.u. NU isotropic component (digitized),n/fis41689 4 8 92. 0.276 +- 0.073 41689 4 9 96. 0.261 +- 0.052 41689 4 10 100. 0.226 41689 4 11 104. 0.212 41689 4 12 108. 0.207 +- 0.052 41689 4 13 112. 0.182 41689 4 14 116. 0.126 41689 4 15 120. 0.174 41689 4 16 124. 0.201 41689 4 17 128. 0.207 +- 0.073 41689 4 18 132. 0.172 +- 0.042 41689 4 19 136. 0.136 41689 4 20 140. 0.215 41689 4 21 144. 0.253 +- 0.052 41689 4 22 148. 0.248 41689 4 23 152. 0.255 41689 4 24 156. 0.292 +- 0.062 41689 4 25 160. 0.308 +- 0.083 41689 4 26 ERR-ANALYS Quantization error ( 1/2 pixel): 41689 4 27 scale X - 0.053 a.m.u., scale Y - 0.0050 n/fis. 41689 4 28 (ERR-S) Statistical errors 41689 4 29 STATUS (CURVE) Fig.2 upper of Yad.Fiz.,v.25,p.723,1977 41689 4 30 ENDBIB 28 0 41689 4 31 COMMON 2 3 41689 4 32 MASS-ERR-D ERR-DIG 41689 4 33 NO-DIM PRT/FIS 41689 4 34 0.091 0.0054 41689 4 35 ENDCOMMON 3 0 41689 4 36 DATA 3 18 41689 4 37 MASS DATA ERR-S 41689 4 38 NO-DIM PRT/FIS PRT/FIS 41689 4 39 92. 1.241 0.104 41689 4 40 96. 1.392 0.062 41689 4 41 100. 1.502 41689 4 42 104. 1.643 41689 4 43 108. 2.095 0.062 41689 4 44 112. 2.506 0.062 41689 4 45 116. 3.093 41689 4 46 120. 3.234 41689 4 47 124. 2.317 0.125 41689 4 48 128. 0.923 0.093 41689 4 49 132. 0.805 0.083 41689 4 50 136. 1.495 41689 4 51 140. 1.688 41689 4 52 144. 1.798 0.062 41689 4 53 148. 1.908 41689 4 54 152. 2.091 41689 4 55 156. 2.180 0.093 41689 4 56 160. 2.145 0.104 41689 4 57 ENDDATA 20 0 41689 4 58 ENDSUBENT 57 0 41689 499999 SUBENT 41689005 20200622 418841689 5 1 BIB 5 28 41689 5 2 REACTION (98-CF-252(0,F)MASS,PRE/PR,KE,N) 41689 5 3 REL-REF (N,14065001,H.R.Bowman+,J,PR,126,2120,1962) 41689 5 4 Data used for comparison 41689 5 5 (N,,H.Nifenecker+,C,73ROCH,2,117,1973) STI/PUB/347 41689 5 6 Data used for comparison 41689 5 7 ADD-RES MASS,a.m.u. KE isotropic component (digitized),MeV 41689 5 8 92. 1.423 +- 0.062 41689 5 9 96. 1.526 +- 0.078 41689 5 10 100. 1.571 +- 41689 5 11 104. 1.627 +- 41689 5 12 108. 1.635 +- 0.099 41689 5 13 112. 1.644 +- 0.088 41689 5 14 116. 1.617 +- 41689 5 15 120. 1.667 +- 41689 5 16 124. 1.536 +- 0.057 41689 5 17 128. 1.534 +- 0.068 41689 5 18 132. 1.673 +- 0.078 41689 5 19 136. 1.635 +- 41689 5 20 140. 1.654 +- 41689 5 21 144. 1.658 +- 0.099 41689 5 22 148. 1.656 +- 41689 5 23 152. 1.613 +- 41689 5 24 156. 1.559 +- 0.052 41689 5 25 160. 1.464 +- 0.062 41689 5 26 ERR-ANALYS Quantization error ( 1/2 pixel): 41689 5 27 scale X - 0.053 a.m.u., scale Y - 0.0030 MeV. 41689 5 28 (ERR-S) Statistical errors 41689 5 29 STATUS (CURVE) Fig.2 lower of Yad.Fiz.,v.25,p.723,1977 41689 5 30 ENDBIB 28 0 41689 5 31 COMMON 2 3 41689 5 32 MASS-ERR-D ERR-DIG 41689 5 33 NO-DIM MEV 41689 5 34 0.136 0.0028 41689 5 35 ENDCOMMON 3 0 41689 5 36 DATA 3 18 41689 5 37 MASS DATA ERR-S 41689 5 38 NO-DIM MEV MEV 41689 5 39 92. 1.075 0.099 41689 5 40 96. 1.115 0.094 41689 5 41 100. 1.212 41689 5 42 104. 1.284 41689 5 43 108. 1.438 0.083 41689 5 44 112. 1.566 0.083 41689 5 45 116. 1.736 41689 5 46 120. 1.802 41689 5 47 124. 1.442 0.109 41689 5 48 128. 1.321 0.099 41689 5 49 132. 1.429 0.104 41689 5 50 136. 1.837 41689 5 51 140. 1.425 41689 5 52 144. 1.304 0.093 41689 5 53 148. 1.277 41689 5 54 152. 1.281 41689 5 55 156. 1.258 0.109 41689 5 56 160. 1.174 0.12 41689 5 57 ENDDATA 20 0 41689 5 58 ENDSUBENT 57 0 41689 599999 SUBENT 41689006 20200622 418841689 6 1 BIB 5 26 41689 6 2 REACTION (98-CF-252(0,F),PR,NU/TKE) 41689 6 3 REL-REF (N,14065001,H.Bowman+,J,PR,126,2120,1962) 41689 6 4 Data used for comparison 41689 6 5 (N,,H.Nifenecker+,C,73ROCH,2,117,1973) STI/PUB/347 41689 6 6 Data used for comparison 41689 6 7 ADD-RES TKE,MeV NU isotropic component (digitized),n/fis 41689 6 8 156.05 3.7548 +- 0.5856 41689 6 9 160.12 3.1365 +- 0.5068 41689 6 10 164.32 2.1917 41689 6 11 168.39 1.6523 41689 6 12 172.34 1.3268 41689 6 13 176.41 0.9563 41689 6 14 180.47 0.8336 41689 6 15 184.41 0.6207 +- 0.0789 41689 6 16 188.36 0.5767 41689 6 17 192.41 0.5891 41689 6 18 196.47 0.4663 41689 6 19 200.41 0.4336 41689 6 20 204.47 0.3897 41689 6 21 208.52 0.5259 +- 0.1577 41689 6 22 212.58 0.5045 +- 0.1464 41689 6 23 ERR-ANALYS Quantization error ( 1/2 pixel): 41689 6 24 scale X - 0.058 MeV, scale Y - 0.0060 n/fis. 41689 6 25 (E-ERR-DIG) Digitizing error for TKE 41689 6 26 (ERR-S) Statistical errors 41689 6 27 STATUS (CURVE) Fig.3 of Yad.Fiz.,v.25,p.723,1977 41689 6 28 ENDBIB 26 0 41689 6 29 COMMON 2 3 41689 6 30 E-ERR-DIG ERR-DIG 41689 6 31 EV PRT/FIS 41689 6 32 0.037 0.0045 41689 6 33 ENDCOMMON 3 0 41689 6 34 DATA 3 16 41689 6 35 TKE DATA ERR-S 41689 6 36 MEV PRT/FIS PRT/FIS 41689 6 37 156.13 4.9034 0.1802 41689 6 38 160.41 5.2424 0.1802 41689 6 39 164.22 5.7165 41689 6 40 168.51 5.5037 41689 6 41 172.57 5.4822 41689 6 42 174.66 5.2801 41689 6 43 176.53 4.9315 41689 6 44 180.48 4.5272 41689 6 45 184.54 4.2243 0.1014 41689 6 46 188.61 3.8312 41689 6 47 192.68 3.3256 41689 6 48 196.86 3.0677 41689 6 49 200.92 2.6972 41689 6 50 204.87 2.4618 41689 6 51 208.83 1.8886 0.1126 41689 6 52 213.01 1.5406 0.1126 41689 6 53 ENDDATA 18 0 41689 6 54 ENDSUBENT 53 0 41689 699999 ENDENTRY 6 0 4168999999999