ENTRY 13837 20020606 00001383700000001 SUBENT 13837001 20020606 00001383700100001 BIB 12 32 1383700100002 INSTITUTE (1USAANL) 1383700100003 REFERENCE (J,PR/C,6,1322,197210) 1383700100004 AUTHOR (L.M.Bollinger,G.E.Thomas) 1383700100005 TITLE 238U(n,gamma)239U and States of 239U 1383700100006 FACILITY (REAC,1USAANL) Reactor CP-5, internal-target facility. 1383700100007 INC-SOURCE (REAC) Reactor core. 1383700100008 SAMPLE Two uranium metal samples, 1.27 cm diam. and 0.132 cm 1383700100009 thick. Isotopic impurities for: 1383700100010 . 2.9 sample - 2 ppm 234U, 2 ppm 235U, 2 ppm 236U; 1383700100011 . 3.0 g sample - 3 ppm 234U, 400 ppm 235U, <1 ppm 236U.1383700100012 Samples mounted in helium-filled through-tube. 1383700100013 DETECTOR (GELI) Annihilation-pair spectrometer having energy 1383700100014 resolution of 3.1 keV at 3.7 MeV and a large signal- 1383700100015 to-background ratio for thermal capture. 1383700100016 ANALYSIS Energies and intensities of observed lines obtained by 1383700100017 fitting spectra with a shape determined from strong 1383700100018 isolated lines. 1383700100019 Impurity lines identified by measuring and 1383700100020 quantitatively comparing line intensities in spectra 1383700100021 for two samples from different sources with different 1383700100022 percentage of impurities. 1383700100023 ADD-RES The neutron binding energy in 238U determined to be 1383700100024 4806.4(4) keV. Parities and spins of the observed 1383700100025 levels established by using average resonance-capture 1383700100026 spectra. 1383700100027 REL-REF (D,,R.K.Sheline+,J,PR,151,1011,1966) 1383700100028 Intensity values obtained are about 35% smaller than 1383700100029 those reported by Sheline et al. The reliability 1383700100030 of values presented was established by obtaining 1383700100031 consistent results in three independent measurements 1383700100032 with different samples. 1383700100033 HISTORY (20020520C) IS + VM 1383700100034 ENDBIB 32 0 1383700100035 COMMON 1 3 1383700100036 EN-DUMMY 1383700100037 EV 1383700100038 0.0253 1383700100039 ENDCOMMON 3 0 1383700100040 ENDSUBENT 39 0 1383700199999 SUBENT 13837002 20020606 00001383700200001 BIB 6 26 1383700200002 REACTION (92-U-238(N,G)92-U-239,,SPC,,SPA) 1383700200003 MONITOR Absolute energies determined relative to 3677.7 (25) 1383700200004 and 5269.2(35) keV lines from 14N(n,gamma)15N. 1383700200005 ((MONIT1)6-C-12(N,G)6-C-13,,SIG,,MXW) 1383700200006 ((MONIT2)7-N-14(N,G)7-N-15,,SIG,,MXW) 1383700200007 ((MONIT3)82-PB-207(N,G)82-PB-208,,SIG,,MXW) 1383700200008 ((MONIT4)92-U-238(N,G)92-U-239,,SIG,,MXW) 1383700200009 Relative intensities determined by comparing observed 1383700200010 intensities with intensities of lines from thermal- 1383700200011 neutron capture in 12C, 14N, and 207Pb. 1383700200012 Absolute intensities determined using uranium-Melamine 1383700200013 (14N) comparisons to establish a normalizing constant.1383700200014 MONIT-REF (,G.E.THOMAS+,J,NIM,56,325,1967) Source of absolute 1383700200015 intensities for 12C(n,gamma) and 14N(n,gamma). 1383700200016 (,M.A.J.MARISCOTTI+,R,BNL-16119,1971) Source of 1383700200017 absolute intensities for 207Pb(n,gamma). 1383700200018 CORRECTION Spectra corrected for lines of graphite sample holder 1383700200019 and traces of nitrogen in helium-filled through-tube. 1383700200020 ERR-ANALYS (DATA-ERR) Uncertainties of absolute line intensities. 1383700200021 (E-ERR) Random error in gamma-ray energies. 1383700200022 Systematic error in gamma-ray energies 0.3 keV. 1383700200023 The main components of error believed to be the 1383700200024 uncertainty in the determination of the line position 1383700200025 and the uncertainty in the energies of the reference 1383700200026 lines. 1383700200027 STATUS Data taken from Table 2 of reference. 1383700200028 ENDBIB 26 0 1383700200029 COMMON 8 6 1383700200030 MONIT1 MONIT1 MONIT2 MONIT2 MONIT3 MONIT3 1383700200031 MONIT4 MONIT4-ERR 1383700200032 MB MB MB MB MB MB 1383700200033 MB MB 1383700200034 3.4 0.2 78. 2. 709. 10. 1383700200035 2.73 0.04 1383700200036 ENDCOMMON 6 0 1383700200037 DATA 6 59 1383700200038 E E-ERR DATA DATA-ERR DATA-APRX DATA-MAX 1383700200039 KEV KEV PRT/INC PRT/INC PRT/INC PRT/INC 1383700200040 4806.4 1.5 7. -051383700200041 4672.6 0.2 59. -05 6. -05 1383700200042 4660.7 0.2 171. -05 15. -05 1383700200043 4612.5 0.2 156. -05 14. -05 1383700200044 4118.7 0.2 75. -05 7. -05 1383700200045 4090.7 0.2 74. -05 7. -05 1383700200046 4080.4 0.2 62. -05 6. -05 1383700200047 4071.7 0.7 7. -05 2. -05 1383700200048 4067.2 0.2 372. -05 10. -05 1383700200049 4060.5 0.2 7300. -05 1383700200050 4049.7 0.5 15. -05 3. -05 1383700200051 3991.4 0.2 1220. -05 30. -05 1383700200052 3982.8 0.2 1315. -05 33. -05 1383700200053 3953.4 0.3 26. -05 4. -05 1383700200054 3918.2 1.0 10. -05 4. -05 1383700200055 3913.1 2.0 4. -05 1383700200056 3873.9 0.2 134. -05 6. -05 1383700200057 3844.5 0.2 345. -05 17. -05 1383700200058 3840.8 0.4 101. -05 5. -05 1383700200059 3817.9 0.5 64. -05 4. -05 1383700200060 3815.9 0.5 84. -05 5. -05 1383700200061 3800.7 0.5 9. -05 3. -05 1383700200062 3744.0 0.2 7. -05 3. -05 1383700200063 3739.8 0.6 191. -05 10. -05 1383700200064 3656.9 0.5 73. -05 8. -05 1383700200065 3653.9 0.8 99. -05 15. -05 1383700200066 3651.6 0.3 352. -05 20. -05 1383700200067 3638.9 0.2 619. -05 30. -05 1383700200068 3611.9 0.2 742. -05 35. -05 1383700200069 3583.1 0.2 2145. -05 99. -05 1383700200070 3574.4 0.7 35. -05 8. -05 1383700200071 3571.2 0.5 58. -05 12. -05 1383700200072 3568.7 0.7 21. -05 6. -05 1383700200073 3564.0 0.5 213. -05 15. -05 1383700200074 3546.1 0.3 47. -05 9. -05 1383700200075 3541.1 0.8 27. -05 7. -05 1383700200076 3535.8 0.5 33. -05 7. -05 1383700200077 3529.6 0.2 83. -05 5. -05 1383700200078 3500.8 0.3 43. -05 4. -05 1383700200079 3488.2 0.3 139. -05 7. -05 1383700200080 3485.9 0.7 40. -05 9. -05 1383700200081 3481.8 0.3 42. -05 5. -05 1383700200082 3445.4 0.2 228. -05 11. -05 1383700200083 3438.4 0.2 117. -05 6. -05 1383700200084 3422.9 0.4 11. -05 4. -05 1383700200085 3406.9 0.8 4. -051383700200086 3401.9 0.2 126. -05 7. -05 1383700200087 3389.5 0.6 7. -05 3. -05 1383700200088 3369.6 0.2 46. -05 5. -05 1383700200089 3360.6 0.2 78. -05 6. -05 1383700200090 3343.9 0.3 21. -05 3. -05 1383700200091 3326.9 0.5 12. -05 4. -05 1383700200092 3324.9 0.2 76. -05 6. -05 1383700200093 3312.8 0.6 204. -05 50. -05 1383700200094 3311.5 0.6 186. -05 50. -05 1383700200095 3301.9 0.3 76. -05 7. -05 1383700200096 3296.5 0.3 354. -05 18. -05 1383700200097 3293.5 1.5 14. -05 5. -05 1383700200098 3286.1 0.2 202. -05 10. -05 1383700200099 ENDDATA 61 0 1383700200100 ENDSUBENT 99 0 1383700299999 ENDENTRY 2 0 1383799999999