ENTRY 14120 20061120 13421412000000001 SUBENT 14120001 20061120 13421412000100001 BIB 11 33 1412000100002 INSTITUTE (1USADNS,1USAORL,1USAKTY) 1412000100003 REFERENCE (J,AAA,171,9,1987) 1412000100004 AUTHOR (R.R.Winters,R.L.Macklin,R.L.Hershberger) 1412000100005 TITLE The Os-189(n, gamma) cross section and implications 1412000100006 for the duration of stellar nucleosynthesis 1412000100007 FACILITY (ACCEL,1USAORL) ORELA 1412000100008 INC-SOURCE (SPALL) 1412000100009 DETECTOR (SCIN) Capture gamma rays are detected by a pair of 1412000100010 nonhydrogeneous liquid scintillators 1412000100011 SAMPLE Enriched osmium sample as eight thin disks of hot 1412000100012 pressed metal powder. Disks were 13 mm in diamter and 1412000100013 about 0.7 mm thick. Total weight, which largely 1412000100014 determines the average capture cross section, was 1412000100015 9.960g. The 8 disks were suspended face-on to the 1412000100016 neutron beam in a pattern two disks wide by four 1412000100017 high, held in place by 6 micro-thick mylar foil. 1412000100018 Isotope mass Isotopic Abundance 1412000100019 186 <0.0005 1412000100020 187 0.0010 1412000100021 188 0.0088 1412000100022 189 0.9541 1412000100023 190 0.0328 1412000100024 192 0.0133 1412000100025 METHOD (TOF) 40 meter station 1412000100026 Analysis with Breit Wigner formula 1412000100027 If Gn is approx. equal to Gg, value of gGn were 1412000100028 obtained from the capture kernel by assuming 1412000100029 Gg = 80 meV 1412000100030 MONITOR Thin 6Li glass scintillator used as a neutron-flux 1412000100031 monitor. 1412000100032 The TOF energy scale is calibrated with sharp 1412000100033 aluminum resonances at 5.903 keV and 1094 keV. 1412000100034 HISTORY (20061120C) DR 1412000100035 ENDBIB 33 0 1412000100036 NOCOMMON 0 0 1412000100037 ENDSUBENT 36 0 1412000199999 SUBENT 14120002 20061120 13421412000200001 BIB 3 4 1412000200002 REACTION (76-OS-189(N,G)76-OS-190,,SIG) 1412000200003 ERR-ANALYS (ERR-SYS) Systematic uncertainties 1412000200004 Statistical error less than 2 % 1412000200005 STATUS (CURVE) Data taken from Fig. 1 1412000200006 ENDBIB 4 0 1412000200007 COMMON 1 3 1412000200008 ERR-SYS 1412000200009 PER-CENT 1412000200010 4. 1412000200011 ENDCOMMON 3 0 1412000200012 DATA 2 128 1412000200013 EN DATA 1412000200014 EV B 1412000200015 266.743 1.835 1412000200016 266.919 0.834 1412000200017 267.022 2.002 1412000200018 267.110 2.502 1412000200019 267.271 2.336 1412000200020 267.315 3.837 1412000200021 267.490 4.504 1412000200022 267.578 6.673 1412000200023 267.680 7.841 1412000200024 267.782 12.178 1412000200025 267.914 16.516 1412000200026 268.030 22.688 1412000200027 268.087 33.866 1412000200028 268.203 47.045 1412000200029 268.317 68.732 1412000200030 268.402 88.918 1412000200031 268.531 112.941 1412000200032 268.618 124.619 1412000200033 268.763 136.630 1412000200034 268.864 142.302 1412000200035 268.997 135.296 1412000200036 269.056 131.959 1412000200037 269.190 118.947 1412000200038 269.279 109.104 1412000200039 269.429 83.580 1412000200040 269.519 67.064 1412000200041 269.624 46.044 1412000200042 269.699 33.532 1412000200043 269.847 25.357 1412000200044 269.979 19.018 1412000200045 270.083 12.679 1412000200046 270.185 11.845 1412000200047 270.303 9.509 1412000200048 270.420 10.677 1412000200049 270.507 13.680 1412000200050 270.610 16.516 1412000200051 270.741 22.521 1412000200052 270.842 30.195 1412000200053 270.943 43.541 1412000200054 271.028 65.729 1412000200055 271.157 87.250 1412000200056 271.242 112.941 1412000200057 271.342 130.791 1412000200058 271.457 146.473 1412000200059 271.588 153.646 1412000200060 271.690 158.151 1412000200061 271.808 155.815 1412000200062 271.883 144.137 1412000200063 272.016 135.462 1412000200064 272.165 110.939 1412000200065 272.241 88.251 1412000200066 272.346 68.899 1412000200067 272.481 47.712 1412000200068 272.571 35.534 1412000200069 272.674 26.859 1412000200070 272.807 20.019 1412000200071 272.925 15.181 1412000200072 272.998 12.846 1412000200073 273.159 13.680 1412000200074 273.262 10.677 1412000200075 273.380 10.343 1412000200076 273.468 8.842 1412000200077 273.570 8.508 1412000200078 273.673 6.673 1412000200079 273.776 6.673 1412000200080 273.937 7.674 1412000200081 274.039 9.342 1412000200082 274.127 12.178 1412000200083 274.273 15.014 1412000200084 274.389 20.853 1412000200085 274.461 28.861 1412000200086 274.577 38.203 1412000200087 274.679 49.214 1412000200088 274.795 58.222 1412000200089 274.911 63.561 1412000200090 274.969 69.399 1412000200091 275.100 75.572 1412000200092 275.203 72.569 1412000200093 275.334 81.244 1412000200094 275.435 92.088 1412000200095 275.536 104.099 1412000200096 275.622 119.948 1412000200097 275.738 132.126 1412000200098 275.869 135.629 1412000200099 275.986 139.466 1412000200100 276.103 135.796 1412000200101 276.207 126.454 1412000200102 276.341 111.439 1412000200103 276.431 93.255 1412000200104 276.580 73.070 1412000200105 276.656 55.720 1412000200106 276.731 40.372 1412000200107 276.820 34.533 1412000200108 277.025 34.032 1412000200109 277.112 39.538 1412000200110 277.214 47.045 1412000200111 277.315 58.723 1412000200112 277.431 69.066 1412000200113 277.546 80.076 1412000200114 277.634 85.415 1412000200115 277.752 78.074 1412000200116 277.870 68.899 1412000200117 277.959 58.389 1412000200118 278.093 42.874 1412000200119 278.198 29.194 1412000200120 278.331 20.353 1412000200121 278.434 14.681 1412000200122 278.537 8.675 1412000200123 278.611 5.839 1412000200124 278.743 6.173 1412000200125 278.845 5.172 1412000200126 278.963 3.837 1412000200127 279.139 5.005 1412000200128 279.300 5.172 1412000200129 279.432 3.337 1412000200130 279.578 2.502 1412000200131 279.710 2.502 1412000200132 279.886 3.837 1412000200133 279.989 2.669 1412000200134 280.106 2.002 1412000200135 280.282 1.335 1412000200136 280.370 2.002 1412000200137 280.575 1.501 1412000200138 280.751 1.501 1412000200139 280.853 2.669 1412000200140 281.000 1.668 1412000200141 281.161 1.668 1412000200142 281.263 1.668 1412000200143 ENDDATA 130 0 1412000200144 ENDSUBENT 143 0 1412000299999 SUBENT 14120003 20061120 13421412000300001 BIB 3 4 1412000300002 REACTION (76-OS-189(N,G)76-OS-190,,SIG,,AV) 1412000300003 ERR-ANALYS (ERR-SYS) Systematic uncertainties 1412000300004 Statistical error less than 2 % 1412000300005 STATUS (TABLE) Data taken from Table 3 1412000300006 ENDBIB 4 0 1412000300007 COMMON 1 3 1412000300008 ERR-SYS 1412000300009 PER-CENT 1412000300010 4. 1412000300011 ENDCOMMON 3 0 1412000300012 DATA 3 16 1412000300013 EN-MIN EN-MAX DATA 1412000300014 KEV KEV MB 1412000300015 3. 4. 5901. 1412000300016 4. 6. 4246. 1412000300017 6. 8. 3344. 1412000300018 8. 10. 2697. 1412000300019 10. 15. 2080. 1412000300020 15. 20. 1655. 1412000300021 20. 30. 1296. 1412000300022 30. 40. 1030. 1412000300023 40. 60. 808. 1412000300024 60. 80. 641. 1412000300025 80. 100. 519. 1412000300026 100. 150. 409. 1412000300027 150. 200. 341. 1412000300028 200. 300. 261. 1412000300029 300. 400. 190. 1412000300030 400. 500. 156. 1412000300031 ENDDATA 18 0 1412000300032 ENDSUBENT 31 0 1412000399999 SUBENT 14120004 20061120 13421412000400001 BIB 3 7 1412000400002 REACTION (76-OS-189(N,G)76-OS-190,,SIG,,MXW) 1412000400003 ERR-ANALYS (ERR-SYS) Systematic uncertainties 1412000400004 (ERR-T) Uncertainty estimates quoted include 1412000400005 only those associated with counting statistics 1412000400006 (negligible) and the strength function (+/- 30%) 1412000400007 used in extrapolating the cross section below 2.5 keV.1412000400008 STATUS (TABLE) Data taken from Table 4 1412000400009 ENDBIB 7 0 1412000400010 COMMON 1 3 1412000400011 ERR-SYS 1412000400012 PER-CENT 1412000400013 4. 1412000400014 ENDCOMMON 3 0 1412000400015 DATA 3 14 1412000400016 KT DATA ERR-T 1412000400017 KEV MB MB 1412000400018 5. 4390. 252. 1412000400019 10. 2599. 71. 1412000400020 15. 1928. 33. 1412000400021 20. 1564. 19. 1412000400022 25. 1332. 13. 1412000400023 30. 1168. 9. 1412000400024 35. 1046. 7. 1412000400025 40. 951. 5. 1412000400026 45. 874. 4. 1412000400027 50. 811. 3. 1412000400028 60. 712. 2. 1412000400029 70. 638. 2. 1412000400030 85. 555. 1. 1412000400031 100. 494. 1. 1412000400032 ENDDATA 16 0 1412000400033 ENDSUBENT 32 0 1412000499999 SUBENT 14120005 20061120 13421412000500001 BIB 5 11 1412000500002 REACTION 1(76-OS-189(N,0),,EN) 1412000500003 2(76-OS-189(N,G),,WID/STR,,FCT) The measured area is 1412000500004 gGnGg/G 1412000500005 3(76-OS-189(N,EL),,WID,,G) 1412000500006 ERR-ANALYS (ERR-SYS) The overall systematic uncertainty for 1412000500007 all area and width is 4 % 1412000500008 (DATA-ERR) All uncertainties quoted unclude counting 1412000500009 statistics and fitting uncertainties only 1412000500010 FLAG (1.) gGn from REL-REF 1412000500011 REL-REF (C,12756001,R.R.Winters+,J,PR/C,34,840,1986) 1412000500012 STATUS (TABLE) Data taken from Table 2 1412000500013 ENDBIB 11 0 1412000500014 COMMON 1 3 1412000500015 ERR-SYS 1412000500016 PER-CENT 1412000500017 4. 1412000500018 ENDCOMMON 3 0 1412000500019 DATA 6 88 1412000500020 DATA 1DATA 2DATA-ERR 2DATA 3DATA-ERR 3FLAG 1412000500021 KEV MILLI-EV MILLI-EV MILLI-EV MILLI-EV NO-DIM 1412000500022 202.36 21.6 0.2 37.90 0.5 1412000500023 204.17 17.5 0.1 27.00 0.3 1412000500024 205.50 0.2 0.1 0.2 0.1 1412000500025 208.19 15.3 0.1 22.00 0.3 1412000500026 209.50 0.3 0.1 0.26 0.1 1412000500027 216.62 7.3 0.1 8.50 0.1 1412000500028 218.00 0.7 0.1 0.72 0.1 1412000500029 218.71 6.9 0.1 9.01 0.2 1412000500030 219.39 6.8 0.1 7.82 0.1 1412000500031 220.00 1.9 0.1 1.99 0.1 1412000500032 221.01 0.6 0.1 0.62 0.1 1412000500033 223.18 0.5 0.1 0.54 0.1 1412000500034 229.22 13.0 0.1 17.70 0.1 1412000500035 230.06 3.0 0.1 3.38 0.1 1412000500036 232.27 0.7 0.1 0.70 0.1 1412000500037 239.29 12.9 0.1 17.40 0.1 1412000500038 246.37 2.3 0.1 2.44 0.1 1412000500039 247.44 0.9 0.1 0.91 0.1 1412000500040 254.25 1.5 0.1 1.53 0.1 1412000500041 256.15 1.3 0.1 1.33 0.1 1412000500042 260.21 3.7 0.1 4.02 0.1 1412000500043 268.97 23.6 0.2 52.00 1. 1412000500044 271.80 26.2 0.2 50.00 1. 1412000500045 275.00 3.4 0.1 3.59 0.1 1412000500046 276.06 19.3 0.2 37.50 1. 1412000500047 277.73 5.9 0.1 7.35 0.1 1412000500048 290.20 8.6 0.1 10.40 0.1 1412000500049 297.59 12.6 0.1 16.90 0.1 1412000500050 300.90 27.9 0.3 69.00 1. 1412000500051 303.27 15.3 0.1 22.00 0.2 1412000500052 305.08 4.7 0.1 5.24 0.1 1412000500053 310.31 10.1 0.1 12.60 0.1 1412000500054 314.83 12.7 0.1 17.00 0.2 1412000500055 317.00 1.1 0.1 1.16 0.1 1412000500056 318.09 13.4 0.1 18.30 0.2 1412000500057 322.13 10.3 0.1 13.00 0.1 1412000500058 326.36 9.7 0.1 12.10 0.1 1412000500059 327.56 6.0 0.1 6.88 0.1 1412000500060 328.90 6.3 0.1 8.02 0.1 1412000500061 330.81 0.7 0.1 0.71 0.1 1412000500062 336.36 1.8 0.1 19.20 0.1 1412000500063 341.63 15.7 0.2 30.00 3. 1412000500064 345.34 1.1 0.1 1.18 0.1 1412000500065 346.27 10.5 0.1 13.30 0.1 1412000500066 350.28 8.3 0.2 11.50 0.3 1412000500067 350.58 7.2 0.3 8.36 0.4 1412000500068 351.15 8.8 0.1 10.70 0.2 1412000500069 358.84 10.1 0.1 12.70 0.1 1412000500070 361.92 22.9 0.1 42.20 0.4 1412000500071 365.71 16.6 0.1 24.80 0.2 1412000500072 367.83 12.4 0.1 21.10 0.3 1412000500073 384.67 3.5 0.1 3.78 0.1 1412000500074 386.09 0.8 0.1 0.81 0.1 1412000500075 388.41 0.4 0.1 0.43 0.1 1412000500076 392.07 1.0 0.1 1.05 0.1 1412000500077 396.89 3.1 0.1 3.36 0.1 1412000500078 400.13 3.0 0.1 3.18 0.1 1412000500079 402.50 20.6 0.1 35.10 0.4 1412000500080 405.26 8.6 0.1 12.00 0.2 1412000500081 410.35 19.0 0.1 30.70 0.3 1412000500082 413.29 11.1 0.1 17.50 0.2 1412000500083 417.00 0.2 0.1 0.20 0.1 1412000500084 417.76 12.6 0.1 16.90 0.2 1412000500085 418.50 1.0 0.1 1.02 0.1 1412000500086 423.71 12.9 0.1 22.80 0.2 1412000500087 430.41 24.4 0.2 47.70 0.6 1412000500088 431.46 11.1 0.2 14.30 0.3 1412000500089 436.90 31.1 0.2 82.50 1.6 1412000500090 438.88 31.1 0.7 81.00 8.1 1412000500091 440.71 28.0 0.6 71.00 7.1 1412000500092 443.08 12.9 0.2 17.40 0.3 1412000500093 449.17 5.5 0.2 6.21 0.2 1412000500094 449.80 3.5 0.1 3.80 0.1 1412000500095 454.69 40.5 0.6 130.0 13.0 1412000500096 459.93 12.9 0.1 17.40 0.2 1412000500097 465.30 24.9 0.4 66.00 6.6 1412000500098 470.90 8.4 0.1 10.10 0.1 1412000500099 472.15 6.7 0.1 9.01 0.1 1412000500100 475.77 5.6 0.1 6.33 0.1 1412000500101 478.62 0.3 0.1 0.29 0.1 1412000500102 480.18 5.7 0.1 6.38 0.1 1412000500103 482.14 21.9 0.1 45.40 0.4 1412000500104 483.00 0.2 0.1 0.20 0.1 1412000500105 486.97 14.8 0.1 21.00 0.2 1412000500106 490.27 15.6 0.2 29.00 2.9 1412000500107 492.95 5.4 0.1 6.05 0.1 1412000500108 497.01 38.4 0.4 113.0 11.3 1412000500109 498.87 3.5 0.1 3.94 0.1 1412000500110 ENDDATA 90 0 1412000500111 ENDSUBENT 110 0 1412000599999 SUBENT 14120006 20061120 13421412000600001 BIB 3 8 1412000600002 REACTION 1(76-OS-189(N,0),,EN) 1412000600003 2(76-OS-189(N,0),,J) 1412000600004 3(76-OS-189(N,G),,WID) 1412000600005 ERR-ANALYS (ERR-SYS) The overall systematic uncertainty for 1412000600006 all area and width is 4 % 1412000600007 (DATA-ERR) All uncertainties quoted unclude counting 1412000600008 statistics and fitting uncertainties only 1412000600009 STATUS (TABLE) Data taken from Table 2 1412000600010 ENDBIB 8 0 1412000600011 COMMON 1 3 1412000600012 ERR-SYS 1412000600013 PER-CENT 1412000600014 4. 1412000600015 ENDCOMMON 3 0 1412000600016 DATA 4 15 1412000600017 DATA 1DATA 2DATA 3DATA-ERR 3 1412000600018 KEV NO-DIM MILLI-EV MILLI-EV 1412000600019 268.97 2. 68.9 1.2 1412000600020 271.80 2. 87.8 1.0 1412000600021 276.06 1. 106.3 2.4 1412000600022 300.90 2. 74.9 7.5 1412000600023 341.63 1. 87.3 2.2 1412000600024 402.50 2. 79.8 1.5 1412000600025 410.35 2. 79.8 1.6 1412000600026 438.88 2. 80.9 8.1 1412000600027 440.71 1. 123.0 12.3 1412000600028 454.69 1. 94.0 1.9 1412000600029 465.30 1. 63.9 1.6 1412000600030 472.15 68.0 10.2 1412000600031 482.14 2. 68.0 10.2 1412000600032 490.27 2. 54.2 5.4 1412000600033 497.01 2. 93.2 9.3 1412000600034 ENDDATA 17 0 1412000600035 ENDSUBENT 34 0 1412000699999 ENDENTRY 6 0 1412099999999