ENTRY G4102 20230619 G410200000001 SUBENT G4102001 20230619 20240316 G410200100001 BIB 13 33 G410200100002 TITLE Structure of mass distributions of photofission G410200100003 product yields of 238U at 17.5 MeV bremsstrahlung G410200100004 energy G410200100005 AUTHOR (E.V.Oleynikov,O.O.Parlag,I.V.Pylypchynets, G410200100006 V.T.Maslyuk,O.I.Lengyel) G410200100007 INSTITUTE (4UKRIEP) G410200100008 REFERENCE (J,VAT/I,,(5/145),26,2023) G410200100009 #doi:10.46813/2023-145-026 G410200100010 FACILITY (MICRT,4UKRIEP) M-30 microtron G410200100011 INC-SOURCE (BRST) To generate bremsstrahlung, a Ta converter G410200100012 (thickness - 1 mm) was used, located at a distance G410200100013 of 22 mm from the output window (material - Ti, G410200100014 thickness - 50 mu-m) of the electron ejection unit. G410200100015 The filter for residual electrons and photoneutrons G410200100016 (B4C) was installed close to the Ta converter G410200100017 perpendicular to the beam axis. G410200100018 DETECTOR (HPGE,GELI) HPGe (ORTEC) and Ge(Li), whose volumes G410200100019 were 150 and 100 cm3 with an energy resolution of G410200100020 ~2.45 and ~3.5 keV (for the line 60Co 1332.5 keV) G410200100021 SAMPLE A rectangular plate of natural metal of 238U (side G410200100022 dimensions of - 11 and 18 mm, thickness - 0.4 mm). G410200100023 (92-U-238,NAT=0.992742) G410200100024 (92-U-235,NAT=0.007204) G410200100025 COMMENT Taken into account the contribution of reactions: G410200100026 235U(g,f)- 1.397%, 238U(e,f)- 1.2e-01%, G410200100027 235U(n,f) - 1.49e-04%, 238U(n,f) - 2.59e-03% of G410200100028 total fissions. G410200100029 METHOD (ACTIV) Induced beta-delayed gamma-activity measured. G410200100030 ADD-RES (COMP) Experimental data are compared with theoretical G410200100031 predictions calculated with GEF 2023/1.1 code. G410200100032 STATUS (APRVD) Approved by O.Parlag G410200100033 HISTORY (20230614C) UkrNDC G410200100034 (20230618R) Data received from O.Parlag G410200100035 ENDBIB 33 0 G410200100036 NOCOMMON 0 0 G410200100037 ENDSUBENT 36 0 G410200199999 SUBENT G4102002 20230619 20240316 G410200200001 BIB 6 57 G410200200002 REACTION 1((92-U-238(G,F)ELEM/MASS,CUM,FY,,BRA)/ G410200200003 (92-U-238(G,F)52-TE-132,CUM,FY,,BRA)) G410200200004 2(92-U-238(G,F)ELEM/MASS,CUM,FY,,BRA) G410200200005 DECAY-DATA ((1.)36-KR-85-M,4.48HR,DG,151.19,0.754) G410200200006 ((2.)36-KR-87,1.272HR,DG,402.6,0.496) G410200200007 ((3.)37-RB-88,0.296HR,DG,1836.0,0.227) G410200200008 ((4.)37-RB-89,0.2525HR,DG,1031.9,0.335) G410200200009 ((5.)38-SR-91,9.63HR,DG,749.8,0.236) G410200200010 ((6.)38-SR-91,9.63HR,DG,1024.3,0.335) G410200200011 ((7.)38-SR-92,2.71HR,DG,1383.93,0.900) G410200200012 ((8.)39-Y-93-G,10.18HR,DG,266.9,0.073) G410200200013 ((9.)40-ZR-95,1536.48HR,DG,756.7,0.545) G410200200014 ((10.)41-NB-97-G,1.202HR,DG,657.94,0.982) G410200200015 ((11.)40-ZR-97,16.91HR,DG,743.4,0.931) G410200200016 ((12.)42-MO-99,65.94HR,DG,739.5,0.122) G410200200017 ((13.)44-RU-103,942.24HR,DG,497.1,0.910) G410200200018 ((14.)44-RU-105,4.44HR,DG,724.4,0.473) G410200200019 ((15.)51-SB-129-G,4.32HR,DG,812.4,0.430) G410200200020 ((16.)53-I-131,192.48HR,DG,364.5,0.817) G410200200021 ((17.)52-TE-132,76.8HR,DG,228.1,0.880) G410200200022 ((18.)53-I-133-G,20.8HR,DG,529.9,0.870) G410200200023 ((19.)52-TE-134,0.697HR,DG,767.2,0.295) G410200200024 ((20.)53-I-134-G,0.875HR,DG,847.03,0.960) G410200200025 ((21.)53-I-134-G,0.875HR,DG,884.09,0.651) G410200200026 ((22.)53-I-135,6.57HR,DG,1260.4,0.289) G410200200027 ((23.)54-XE-138,0.2346HR,DG,434.56,0.203) G410200200028 ((24.)55-CS-138-G,0.5568HR,DG,1009.8,0.298) G410200200029 ((25.)56-BA-139,1.384HR,DG,165.9,0.237) G410200200030 ((26.)57-LA-140,40.285HR,DG,815.77,0.233) G410200200031 ((27.)58-CE-141,780.0HR,DG,145.4,0.483) G410200200032 ((28.)57-LA-142,1.518HR,DG,641.29,0.474) G410200200033 ((29.)58-CE-143,33.03HR,DG,293.3,0.428) G410200200034 ((30.)60-ND-147,263.52HR,DG,91.11,0.281) G410200200035 ((31.)60-ND-149,1.728HR,DG,211.3,0.259) G410200200036 MONITOR 2(92-U-238(G,F)52-TE-132,CUM,FY,,BRA) G410200200037 MONIT-REF 2(G0086003,M.Delarue+,J,NIM/A,1040,167259,2022) G410200200038 ERR-ANALYS (DATA-ERR) The total error of the product yields was G410200200039 estimated taking into account the statistical errors ofG410200200040 their gamma-lines intensities, analysis of time G410200200041 dependencies (irradiation, cooling, and measurements), G410200200042 scatter of values averaged over individual series of G410200200043 measurements, errors of interpolated efficiency values G410200200044 and nuclear spectrometric constants (energy and G410200200045 intensity of gamma-lines, half-lives of products and G410200200046 their precursors in the isobaric chain). The total G410200200047 error in determining the relative yields of fission G410200200048 products did not exceed 10%. G410200200049 (ERR-S,3.,5.) The statistical error of the measurementsG410200200050 of the intensity of the gamma-lines of the photofissionG410200200051 of 238U products did not exceed 3-5%. G410200200052 Systematic uncertainties: G410200200053 (ERR-1,,0.5) The irradiation, cooling, and measurement G410200200054 time errors G410200200055 (ERR-2,4.,5.) Detector efficiency calibration error G410200200056 Gamma-ray abundance errors ~2% G410200200057 Half-life of nuclides of fission product errors ~1%. G410200200058 STATUS (TABLE) Correspond to Fig.9 in J,VAT/I,,(5/145),26,2023G410200200059 ENDBIB 57 0 G410200200060 COMMON 2 3 G410200200061 EN-MAX MONIT 2 G410200200062 MEV PC/FIS G410200200063 17.5 4.71 G410200200064 ENDCOMMON 3 0 G410200200065 DATA 7 31 G410200200066 MASS ELEMENT ISOMER DATA 1DATA 2DATA-ERR 2G410200200067 DECAY-FLAG G410200200068 NO-DIM NO-DIM NO-DIM NO-DIM PC/FIS PC/FIS G410200200069 NO-DIM G410200200070 85. 36. 1. 0.270 1.29 0.127G410200200071 1. G410200200072 87. 36. 0.340 1.64 0.160G410200200073 2. G410200200074 88. 37. 0.468 2.21 0.220G410200200075 3. G410200200076 89. 37. 0.494 3.06 0.233G410200200077 4. G410200200078 91. 38. 1.007 4.76 0.474G410200200079 5. G410200200080 91. 38. 0.990 4.70 0.466G410200200081 6. G410200200082 92. 38. 0.938 4.43 0.441G410200200083 7. G410200200084 93. 39. 0. 0.931 4.50 0.439G410200200085 8. G410200200086 95. 40. 1.258 6.20 0.593G410200200087 9. G410200200088 97. 40. 1.254 5.93 0.591G410200200089 11. G410200200090 97. 41. 1.220 5.77 0.575G410200200091 10. G410200200092 99. 42. 1.314 6.48 0.619G410200200093 12. G410200200094 103. 44. 0.989 4.87 0.466G410200200095 13. G410200200096 105. 44. 0.543 2.57 0.256G410200200097 14. G410200200098 129. 51. 0. 0.267 1.26 0.126G410200200099 15. G410200200100 131. 53. 0.799 3.78 0.376G410200200101 16. G410200200102 132. 52. 1. 4.71 0.471G410200200103 17. G410200200104 133. 53. 0. 1.413 6.96 0.666G410200200105 18. G410200200106 134. 52. 1.269 6.00 0.598G410200200107 19. G410200200108 134. 53. 0. 1.235 7.66 0.582G410200200109 20. G410200200110 134. 53. 0. 1.185 7.34 0.558G410200200111 21. G410200200112 135. 53. 1.082 5.08 0.510G410200200113 22. G410200200114 138. 54. 1.465 9.08 0.690G410200200115 23. G410200200116 138. 55. 0. 1.205 7.47 0.568G410200200117 24. G410200200118 139. 56. 1.318 6.25 0.621G410200200119 25. G410200200120 140. 57. 1.158 5.98 0.545G410200200121 26. G410200200122 141. 58. 1.063 5.24 0.501G410200200123 27. G410200200124 142. 57. 0.855 5.30 0.403G410200200125 28. G410200200126 143. 58. 0.780 3.84 0.367G410200200127 29. G410200200128 147. 60. 0.489 2.41 0.230G410200200129 30. G410200200130 149. 60. 0.291 1.38 0.137G410200200131 31. G410200200132 ENDDATA 66 0 G410200200133 ENDSUBENT 132 0 G410200299999 ENDENTRY 2 0 G410299999999