ENTRY 13822 20180818 14431382200000001 SUBENT 13822001 20180818 14431382200100001 BIB 14 56 1382200100002 INSTITUTE (1USAANL) 1382200100003 REFERENCE (J,PR,132,1640,1963) 1382200100004 AUTHOR (L.M.Bollinger,R.E.Cote,R.T.Carpenter,J.P.Marion) 1382200100005 TITLE Distribution of Partial Radiation Widths 1382200100006 FACILITY (CHOPF,1USAANL) Rotor speed of 15,000 rpm determined 1382200100007 a burst width of about 1.5 microsec. 1382200100008 INC-SOURCE (REAC) Argonne research reactor CP-5. 1382200100009 SAMPLE Large elemental slab mounted with normal to its 1382200100010 surface at an angle of about 70 degrees with respect 1382200100011 to the direction of the incident beam. Target 1382200100012 separated from scintillator by 1/4 in. of lead and 1382200100013 thick wall of a neutron-absorbing material. 1382200100014 DETECTOR (NAICR) Scintillation spectrometer with a single large 1382200100015 (15x20 cm) NaI(Tl) scintillator; resolution width 1382200100016 about 8.5% for 137Cs gamma rays and about 3.5% for 1382200100017 8-MeV gamma rays. 1382200100018 METHOD Measured high-energy (E1) gamma transitions. 1382200100019 In addition to singles spectra, spectra associated 1382200100020 with coincident pulses in two large scintillators 1382200100021 were recorded for some of the targets and used to 1382200100022 give auxiliary information of various kinds. 1382200100023 (TOF) The over-all resolution of the system about 1382200100024 0.10 microsec/m with a 25-m flight path. 1382200100025 Measured difference in time between neutron burst at 1382200100026 chopper and detection of a capture gamma ray by 1382200100027 scintillator. Pulse height and TOF spectra 1382200100028 simultaneously recorded for spectral analysis in a 1382200100029 three-parameter pulse analyzer. 1382200100030 ANALYSIS For the most elementary complex spectra, in which the 1382200100031 position and shape of each contributing line is known,1382200100032 the intensities of a transition from initial to final 1382200100033 states were determined by making a linear least- 1382200100034 squares fit of the experimentally measured pulse- 1382200100035 height spectrum. 1382200100036 Line positions determined by finding the set of line 1382200100037 positions that results in the minimum value of chi2. 1382200100038 CORRECTION Corrected for: 1382200100039 . background spectrum at any given resonance 1382200100040 . distortion of spectra by addition of pulses from 1382200100041 more than one gamma ray; corrected both for pile up 1382200100042 of pulses from independent sources and for summing 1382200100043 of pulses from cascade of gamma rays produced by 1382200100044 capture of a single neutron. 1382200100045 ERR-ANALYS (ERR-S) Statistical errors given. 1382200100046 For intensities of the few low-energy (well isolated) 1382200100047 states, the principal sources of systematic error 1382200100048 resulted from uncertainties in the true line shapes 1382200100049 and in the background corrections. 1382200100050 These uncertainties make it difficult to determine the 1382200100051 intensities of weak transitions, which are very 1382200100052 frequent in a population governed by a chi2 1382200100053 distribution with one degree of freedom. 1382200100054 STATUS (TABLE) Data taken from Table I,II,III and IV of 1382200100055 reference. 1382200100056 HISTORY (20020206C) IS 1382200100057 (20180807A) OS. REACTION codes corrected 1382200100058 ENDBIB 56 0 1382200100059 NOCOMMON 0 0 1382200100060 ENDSUBENT 59 0 1382200199999 SUBENT 13822002 20180818 14431382200200001 BIB 5 18 1382200200002 REACTION (80-HG-199(N,G)80-HG-200,,SPC,,REL/RES) 1382200200003 SAMPLE HgS sample; thickness 1.4 g/cm2. 1382200200004 ANALYSIS Contribution from sum pulses determined by making 1382200200005 two runs with different solid angles. 1382200200006 MONITOR Reference line shape for single gamma-ray energies 1382200200007 from 7 to 8 MeV determined relative to 7.64-MeV gamma 1382200200008 from neutron capture in iron. For other enrgies, 1382200200009 the Iron 9.32-MeV gamma, or the 96-eV resonance of 1382200200010 198Pt with a strong line at ~5.48 MeV and a weaker 1382200200011 line at ~4.46 MeV were used. 1382200200012 Intensities normalized relative to a gamma-ray 1382200200013 intensity believed to be approximately proportional 1382200200014 to the number of neutrons captured. This assumes 1382200200015 that the multiplicity and gross features of the 1382200200016 capture gamma-ray spectra of the given nuclide are 1382200200017 approximately the same for all resonances of a 1382200200018 particular spin and parity. 1382200200019 HISTORY (20180807A) REACTION SF4 added 1382200200020 ENDBIB 18 0 1382200200021 NOCOMMON 0 0 1382200200022 DATA 4 15 1382200200023 EN-RES E-LVL DATA ERR-S 1382200200024 EV MEV ARB-UNITS ARB-UNITS 1382200200025 34. 0. 1779. 28. 1382200200026 34. 0.368 106. 31. 1382200200027 34. 0.948 61. 43. 1382200200028 34. 1.050 -45. 32. 1382200200029 34. 1.267 543. 38. 1382200200030 175. 0. 79. 22. 1382200200031 175. 0.368 683. 53. 1382200200032 175. 0.948 188. 119. 1382200200033 175. 1.050 755. 103. 1382200200034 175. 1.267 65. 110. 1382200200035 264. 0. 1142. 64. 1382200200036 264. 0.368 888. 102. 1382200200037 264. 0.948 465. 224. 1382200200038 264. 1.050 110. 191. 1382200200039 264. 1.267 1480. 228. 1382200200040 ENDDATA 17 0 1382200200041 ENDSUBENT 40 0 1382200299999 SUBENT 13822003 20180818 14431382200300001 BIB 5 19 1382200300002 REACTION (78-PT-195(N,G)78-PT-196,,SPC,,REL/RES) 1382200300003 SAMPLE 2.3-g/cm2-thick platinum metal. 1382200300004 MONITOR Reference line shape for single gamma-ray energies 1382200300005 from 7 to 8 MeV determined relative to 7.64-MeV gamma 1382200300006 from neutron capture in iron. For other enrgies, 1382200300007 the Iron 9.32-MeV gamma, or the 96-eV resonance of 1382200300008 198Pt with a strong line at ~5.48 MeV and a weaker 1382200300009 line at ~4.46 MeV were used. 1382200300010 Spectra normalized using data of Moxon and Rae, 1382200300011 by comparing the intensity of gamma rays giving 1382200300012 pulses in NaI greater than 2 MeV with the rate 1382200300013 of neutron capture. 1382200300014 ERR-ANALYS Comparing the spectra recorded with different solid 1382200300015 angles revealed that the errors from pile up and from 1382200300016 sum pulses were undetectably small. 1382200300017 The principal uncertainties considered, were those that1382200300018 result from imperfect resolution in the neutron time 1382200300019 of flight. 1382200300020 HISTORY (20180807A) REACTION SF4 added 1382200300021 ENDBIB 19 0 1382200300022 NOCOMMON 0 0 1382200300023 DATA 4 24 1382200300024 EN-RES E-LVL DATA ERR-S 1382200300025 EV MEV ARB-UNITS ARB-UNITS 1382200300026 12. 0. 2355. 24. 1382200300027 12. 0.354 214. 26. 1382200300028 12. 0.686 39. 26. 1382200300029 19. 0. 433. 8. 1382200300030 19. 0.354 210. 10. 1382200300031 19. 0.686 226. 12. 1382200300032 67.4 0. 2019. 52. 1382200300033 67.4 0.354 1782. 73. 1382200300034 67.4 0.686 97. 71. 1382200300035 112. 0. 556. 25. 1382200300036 112. 0.354 676. 40. 1382200300037 112. 0.686 353. 44. 1382200300038 120. 0. 1413. 33. 1382200300039 120. 0.354 122. 36. 1382200300040 120. 0.686 452. 42. 1382200300041 140. 0. 275. 17. 1382200300042 140. 0.354 225. 28. 1382200300043 140. 0.686 2495. 54. 1382200300044 151. 0. 246. 28. 1382200300045 151. 0.354 71. 37. 1382200300046 151. 0.686 75. 41. 1382200300047 189. 0. 703. 42. 1382200300048 189. 0.354 115. 55. 1382200300049 189. 0.686 943. 77. 1382200300050 ENDDATA 26 0 1382200300051 ENDSUBENT 50 0 1382200399999 SUBENT 13822004 20180818 14431382200400001 BIB 6 22 1382200400002 REACTION (74-W-183(N,G)74-W-184,,SPC,,REL/RES) 1382200400003 SAMPLE Tungsten metal; thickness 1.9 g/cm2. 1382200400004 ANALYSIS The spectra of two resonances of 183W , at 7 and 27 eV,1382200400005 have characteristics that permitted an accurate 1382200400006 determination of the position as well as the shape of 1382200400007 the reference line. 1382200400008 MONITOR Reference line shape for single gamma-ray energies 1382200400009 from 7 to 8 MeV determined relative to 7.64-MeV gamma 1382200400010 from neutron capture in iron. For other enrgies, 1382200400011 the Iron 9.32-MeV gamma, or the 96-eV resonance of 1382200400012 198Pt with a strong line at ~5.48 MeV and a weaker 1382200400013 line at ~4.46 MeV were used. 1382200400014 Intensities normalized relative to a gamma-ray 1382200400015 intensity believed to be approximately proportional 1382200400016 to the number of neutrons captured. This assumes 1382200400017 that the multiplicity and gross features of the 1382200400018 capture gamma-ray spectra of the given nuclide are 1382200400019 approximately the same for all resonances of a 1382200400020 particular spin and parity. 1382200400021 CORRECTION Corrected for sum pulses, which were determined by 1382200400022 a sum-coincidence measurement. 1382200400023 HISTORY (20180807A) REACTION SF4 added 1382200400024 ENDBIB 22 0 1382200400025 NOCOMMON 0 0 1382200400026 DATA 4 30 1382200400027 EN-RES E-LVL DATA ERR-S 1382200400028 EV MEV ARB-UNITS ARB-UNITS 1382200400029 7. 0. 2775. 132. 1382200400030 7. 0.111 86. 132. 1382200400031 7. 0.690 119. 46. 1382200400032 7. 0.904 129. 86. 1382200400033 7. 1.001 2019. 119. 1382200400034 7. 1.150 1511. 81. 1382200400035 27. 0. 63. 95. 1382200400036 27. 0.111 1580. 95. 1382200400037 27. 0.690 -56. 26. 1382200400038 27. 0.904 691. 44. 1382200400039 27. 1.001 321. 56. 1382200400040 27. 1.150 338. 34. 1382200400041 41. 0. 89. 90. 1382200400042 41. 0.111 730. 90. 1382200400043 41. 0.690 49. 56. 1382200400044 41. 0.904 162. 95. 1382200400045 41. 1.001 561. 129. 1382200400046 41. 1.150 387. 84. 1382200400047 46. 0. 1063. 90. 1382200400048 46. 0.111 420. 90. 1382200400049 46. 0.690 46. 25. 1382200400050 46. 0.904 6. 40. 1382200400051 46. 1.001 965. 56. 1382200400052 46. 1.150 89. 33. 1382200400053 65. 0. 1005. 144. 1382200400054 65. 0.111 1502. 150. 1382200400055 65. 0.690 -29. 127. 1382200400056 65. 0.904 -324. 196. 1382200400057 65. 1.001 821. 288. 1382200400058 65. 1.150 2196. 196. 1382200400059 ENDDATA 32 0 1382200400060 ENDSUBENT 59 0 1382200499999 SUBENT 13822005 20180818 14431382200500001 BIB 6 20 1382200500002 REACTION (34-SE-77(N,G)34-SE-78,,SPC,,REL/RES) 1382200500003 SAMPLE Selenium metal powder; thickness 5.0-g/cm2. 1382200500004 MONITOR Basic line shape was determined relative to 9.30-MeV 1382200500005 line in iorn thermal capture gamma-ray spectrum and 1382200500006 from intense line at 9.88 MeV in spectrum of the 1382200500007 340-eV resonance of Se77. 1382200500008 Intensities normalized relative to a gamma-ray 1382200500009 intensity believed to be approximately proportional 1382200500010 to the number of neutrons captured. This assumes 1382200500011 that the multiplicity and gross features of the 1382200500012 capture gamma-ray spectra of the given nuclide are 1382200500013 approximately the same for all resonances of a 1382200500014 particular spin and parity. 1382200500015 CORRECTION Large correction for sum pulses, made with accuracy 1382200500016 from sum-coincidence data. 1382200500017 ERR-ANALYS Systematic uncertainties for the normalizing constant 1382200500018 of 77Se spectra estimated to be about 20%, which is 1382200500019 not significant compared to fluctuations that partial 1382200500020 radiation widths exhibit. 1382200500021 HISTORY (20180807A) REACTION SF4 added 1382200500022 ENDBIB 20 0 1382200500023 NOCOMMON 0 0 1382200500024 DATA 4 12 1382200500025 EN-RES E-LVL DATA ERR-S 1382200500026 EV MEV ARB-UNITS ARB-UNITS 1382200500027 113. 0. 36. 14. 1382200500028 113. 0.615 38. 22. 1382200500029 113. 1.307 319. 48. 1382200500030 290. 0. 142. 25. 1382200500031 290. 0.615 552. 48. 1382200500032 290. 1.307 -50. 68. 1382200500033 340. 0. 83. 14. 1382200500034 340. 0.615 2281. 40. 1382200500035 340. 1.307 -68. 55. 1382200500036 475. 0. 376. 82. 1382200500037 475. 0.615 1129. 153. 1382200500038 475. 1.307 20. 162. 1382200500039 ENDDATA 14 0 1382200500040 ENDSUBENT 39 0 1382200599999 ENDENTRY 5 0 1382299999999