ENTRY 14269 20110113 13701426900000001 SUBENT 14269001 20110113 13701426900100001 BIB 11 33 1426900100002 TITLE Total neutron cross-sections for rare isotopes using a 1426900100003 digital-signal-processing technique: Case study 48Ca 1426900100004 AUTHOR (R.Shane, R.J.Charity, J.M.Elson, L.G.Sobotka, 1426900100005 M.Devlin, N.Fotiades, J.M.O'Donnell) 1426900100006 INSTITUTE (1USAWAS,1USALAS) 1426900100007 REFERENCE (J,NIM/A,614,468,2010) 1426900100008 FACILITY (LINAC,1USALAS) WNR facility, Los Alamos Neutron 1426900100009 Science Center (LANSCE) 1426900100010 DETECTOR (SCIN) Thin (1/4in.) and thick (2in.) fast-plastic 1426900100011 scintillators BC-408 served as the stop detectors. 1426900100012 The thin detector had a single photomultiplier tube 1426900100013 (PMT) while for the thick one, two 2 in.-diameter PMTs1426900100014 (RCA8575) were connected on opposite ends of the 1426900100015 scintillator. 1426900100016 Signal digitization was performed using 8-bit Acqiris 1426900100017 model DC265 cPCI-based digitizer boards with 2 Mb or 1426900100018 256 kb on-board memory. 1426900100019 METHOD (TOF) Incident neutron energy was determined with 1426900100020 time-of-flight method 1426900100021 INC-SOURCE (SPALL) A proton beam with energy of 800 MeV with an 1426900100022 average intensity of 2 mA bombarded a tungsten target 1426900100023 producing a white (i.e. continuous energy) source of 1426900100024 neutrons. 1426900100025 The proton pulses (referred to as micropulses) are less1426900100026 than 1 ns in width and were repeated at 1.8 mu-s 1426900100027 intervals for a period for 625 or 725 ms (referred to 1426900100028 as a macropulse). 1426900100029 The macropulse was repeated at 60 Hz, or every 16.7 ms.1426900100030 CORRECTION Dead time correction: Less than 2% below 25 MeV, 1426900100031 increased to as much as 18% at 250 MeV 1426900100032 STATUS (APRVD) Rebecca Shane (2011-01-13) 1426900100033 HISTORY (20100505C) Compiled by S.H. 1426900100034 (20110113A) On. STATUS updated 1426900100035 ENDBIB 33 0 1426900100036 NOCOMMON 0 0 1426900100037 ENDSUBENT 36 0 1426900199999 SUBENT 14269002 20110113 13701426900200001 BIB 5 9 1426900200002 REACTION 1(6-C-0(N,TOT),,SIG) 1426900200003 2(6-C-0(N,TOT),,SIG) 1426900200004 SAMPLE Natural C sample 1426900200005 1 5.3407 g, 12.69 mm(diam.)x25.42 mm(length), 4.72 b/at1426900200006 2 2.6697 g, 12.70 mm(diam.)x12.71 mm(length), 9.46 b/at1426900200007 ERR-ANALYS (ERR-S) Counting statistics 1426900200008 STATUS (TABLE) Data from authors 1426900200009 HISTORY (20110112R) On. Received from Rebecca Shane 1426900200010 (20110113A) On. Numerical data inserted 1426900200011 ENDBIB 9 0 1426900200012 NOCOMMON 0 0 1426900200013 DATA 5 42 1426900200014 EN DATA 1ERR-S 1DATA 2ERR-S 2 1426900200015 MEV B B B B 1426900200016 15.87 1.4478 0.0026 1.4595 0.0050 1426900200017 17.00 1.4599 0.0025 1.4742 0.0048 1426900200018 18.22 1.4067 0.0024 1.4105 0.0047 1426900200019 19.52 1.4765 0.0024 1.4868 0.0046 1426900200020 20.92 1.4827 0.0024 1.4931 0.0046 1426900200021 22.42 1.4111 0.0024 1.4189 0.0046 1426900200022 24.02 1.4104 0.0024 1.4162 0.0045 1426900200023 25.74 1.4023 0.0023 1.4171 0.0045 1426900200024 27.58 1.3751 0.0023 1.3884 0.0044 1426900200025 29.56 1.3375 0.0022 1.3481 0.0042 1426900200026 31.67 1.2884 0.0021 1.3017 0.0041 1426900200027 33.94 1.2464 0.0021 1.2437 0.0040 1426900200028 36.37 1.2057 0.0020 1.2125 0.0039 1426900200029 38.97 1.1591 0.0020 1.1638 0.0038 1426900200030 41.76 1.1072 0.0019 1.1115 0.0038 1426900200031 44.75 1.0538 0.0019 1.0493 0.0037 1426900200032 47.95 0.9986 0.0019 0.9924 0.0036 1426900200033 51.38 0.9394 0.0018 0.9335 0.0036 1426900200034 55.05 0.8823 0.0018 0.8850 0.0035 1426900200035 58.99 0.8295 0.0018 0.8276 0.0035 1426900200036 63.21 0.7725 0.0018 0.7771 0.0035 1426900200037 67.74 0.7234 0.0018 0.7279 0.0035 1426900200038 72.58 0.6775 0.0018 0.6785 0.0035 1426900200039 77.78 0.6314 0.0018 0.6300 0.0035 1426900200040 83.34 0.5862 0.0018 0.5843 0.0035 1426900200041 89.31 0.5452 0.0018 0.5446 0.0035 1426900200042 95.70 0.5091 0.0018 0.5045 0.0035 1426900200043 102.54 0.4730 0.0018 0.4773 0.0035 1426900200044 109.88 0.4335 0.0018 0.4379 0.0036 1426900200045 117.74 0.4066 0.0018 0.4039 0.0036 1426900200046 126.17 0.3849 0.0018 0.3860 0.0036 1426900200047 135.20 0.3636 0.0018 0.3603 0.0036 1426900200048 144.87 0.3446 0.0018 0.3444 0.0036 1426900200049 155.24 0.3239 0.0018 0.3244 0.0037 1426900200050 166.34 0.3145 0.0019 0.3150 0.0037 1426900200051 178.25 0.3037 0.0019 0.3065 0.0037 1426900200052 191.00 0.2963 0.0019 0.2949 0.0037 1426900200053 204.67 0.2818 0.0019 0.2885 0.0038 1426900200054 219.31 0.2838 0.0019 0.2894 0.0038 1426900200055 235.00 0.2807 0.0019 0.2873 0.0038 1426900200056 251.82 0.2751 0.0019 0.2776 0.0038 1426900200057 269.84 0.2717 0.0019 0.2727 0.0038 1426900200058 ENDDATA 44 0 1426900200059 ENDSUBENT 58 0 1426900299999 SUBENT 14269003 20110113 13701426900300001 BIB 5 10 1426900300002 REACTION (20-CA-48(N,TOT),,SIG) 1426900300003 SAMPLE Enriched 48Ca sample 1426900300004 2.7170 g, 12.7 mm (diam.)x11.94 mm (length), 34.8 b/at1426900300005 (20-CA-48,ENR=0.923) 1426900300006 (20-CA-40,ENR=0.07) 1426900300007 ERR-ANALYS (DATA-ERR) Counting statistics and systematic 1426900300008 uncertainty due to oxidation of sample (up to 1.5%) 1426900300009 STATUS (TABLE) Data from authors 1426900300010 HISTORY (20110112R) On. Received from Rebecca Shane 1426900300011 (20110113A) On. Numerical data inserted 1426900300012 ENDBIB 10 0 1426900300013 NOCOMMON 0 0 1426900300014 DATA 3 69 1426900300015 EN DATA DATA-ERR 1426900300016 MEV B B 1426900300017 12.04 2.685 0.070 1426900300018 12.60 2.621 0.053 1426900300019 13.20 2.565 0.047 1426900300020 13.82 2.463 0.043 1426900300021 14.47 2.351 0.041 1426900300022 15.15 2.323 0.041 1426900300023 15.87 2.310 0.039 1426900300024 16.62 2.255 0.038 1426900300025 17.40 2.220 0.038 1426900300026 18.22 2.219 0.037 1426900300027 19.08 2.187 0.037 1426900300028 19.98 2.245 0.037 1426900300029 20.92 2.245 0.038 1426900300030 21.91 2.222 0.038 1426900300031 22.94 2.256 0.037 1426900300032 24.02 2.213 0.037 1426900300033 25.16 2.315 0.037 1426900300034 26.34 2.357 0.036 1426900300035 27.58 2.312 0.036 1426900300036 28.88 2.380 0.035 1426900300037 30.25 2.391 0.034 1426900300038 31.67 2.393 0.034 1426900300039 33.17 2.403 0.034 1426900300040 34.73 2.455 0.033 1426900300041 36.37 2.471 0.032 1426900300042 38.08 2.497 0.032 1426900300043 39.88 2.440 0.031 1426900300044 41.76 2.496 0.031 1426900300045 43.73 2.462 0.030 1426900300046 45.79 2.434 0.030 1426900300047 47.95 2.399 0.029 1426900300048 50.21 2.392 0.028 1426900300049 52.58 2.322 0.028 1426900300050 55.05 2.294 0.027 1426900300051 57.65 2.253 0.027 1426900300052 60.37 2.256 0.026 1426900300053 63.21 2.123 0.026 1426900300054 66.19 2.093 0.025 1426900300055 69.32 2.070 0.025 1426900300056 72.58 2.016 0.024 1426900300057 76.01 1.929 0.024 1426900300058 79.59 1.893 0.024 1426900300059 83.34 1.787 0.023 1426900300060 87.27 1.721 0.023 1426900300061 91.39 1.634 0.023 1426900300062 95.70 1.595 0.022 1426900300063 100.21 1.504 0.022 1426900300064 104.93 1.474 0.022 1426900300065 109.88 1.386 0.021 1426900300066 115.06 1.301 0.021 1426900300067 120.49 1.280 0.021 1426900300068 126.17 1.273 0.021 1426900300069 132.12 1.161 0.021 1426900300070 138.35 1.176 0.020 1426900300071 144.87 1.102 0.020 1426900300072 151.70 1.031 0.020 1426900300073 158.85 1.028 0.020 1426900300074 166.34 1.040 0.020 1426900300075 174.19 1.018 0.020 1426900300076 182.40 0.957 0.020 1426900300077 191.00 0.949 0.020 1426900300078 200.01 0.940 0.020 1426900300079 209.44 0.924 0.020 1426900300080 219.31 0.899 0.020 1426900300081 229.65 0.907 0.020 1426900300082 240.48 0.878 0.020 1426900300083 251.82 0.882 0.020 1426900300084 263.69 0.872 0.020 1426900300085 276.13 0.852 0.019 1426900300086 ENDDATA 71 0 1426900300087 ENDSUBENT 86 0 1426900399999 SUBENT 14269004 20110113 13701426900400001 BIB 5 7 1426900400002 REACTION (20-CA-40(N,TOT),,SIG) 1426900400003 SAMPLE Natural Ca sample 1426900400004 2.742 g, 12.7 mm (diam.)x14.46 mm (length), 30.7 b/at 1426900400005 ERR-ANALYS (ERR-S) Counting statistics 1426900400006 STATUS (TABLE) Data from authors 1426900400007 HISTORY (20110112R) On. Received from Rebecca Shane 1426900400008 (20110113C) On 1426900400009 ENDBIB 7 0 1426900400010 NOCOMMON 0 0 1426900400011 DATA 3 69 1426900400012 EN DATA ERR-S 1426900400013 MEV B B 1426900400014 12.04 2.491 0.045 1426900400015 12.60 2.385 0.033 1426900400016 13.20 2.278 0.026 1426900400017 13.82 2.194 0.023 1426900400018 14.47 2.151 0.021 1426900400019 15.15 2.152 0.020 1426900400020 15.87 2.108 0.019 1426900400021 16.62 2.093 0.019 1426900400022 17.40 2.067 0.018 1426900400023 18.22 2.099 0.018 1426900400024 19.08 2.086 0.018 1426900400025 19.98 2.127 0.018 1426900400026 20.92 2.145 0.018 1426900400027 21.91 2.132 0.018 1426900400028 22.94 2.160 0.018 1426900400029 24.02 2.194 0.017 1426900400030 25.16 2.230 0.017 1426900400031 26.34 2.274 0.017 1426900400032 27.58 2.255 0.017 1426900400033 28.88 2.283 0.016 1426900400034 30.25 2.278 0.016 1426900400035 31.67 2.269 0.016 1426900400036 33.17 2.284 0.015 1426900400037 34.73 2.343 0.015 1426900400038 36.37 2.318 0.015 1426900400039 38.08 2.323 0.015 1426900400040 39.88 2.317 0.015 1426900400041 41.76 2.319 0.014 1426900400042 43.73 2.287 0.014 1426900400043 45.79 2.260 0.014 1426900400044 47.95 2.217 0.014 1426900400045 50.21 2.206 0.014 1426900400046 52.58 2.160 0.014 1426900400047 55.05 2.122 0.013 1426900400048 57.65 2.077 0.013 1426900400049 60.37 2.061 0.013 1426900400050 63.21 1.984 0.013 1426900400051 66.19 1.953 0.013 1426900400052 69.32 1.890 0.013 1426900400053 72.58 1.869 0.013 1426900400054 76.01 1.786 0.013 1426900400055 79.59 1.736 0.013 1426900400056 83.34 1.635 0.013 1426900400057 87.27 1.593 0.013 1426900400058 91.39 1.532 0.013 1426900400059 95.70 1.460 0.013 1426900400060 100.21 1.407 0.013 1426900400061 104.93 1.329 0.013 1426900400062 109.88 1.263 0.013 1426900400063 115.06 1.194 0.013 1426900400064 120.49 1.144 0.013 1426900400065 126.17 1.119 0.013 1426900400066 132.12 1.083 0.013 1426900400067 138.35 1.058 0.013 1426900400068 144.87 0.977 0.013 1426900400069 151.70 0.907 0.013 1426900400070 158.85 0.949 0.013 1426900400071 166.34 0.896 0.013 1426900400072 174.19 0.872 0.013 1426900400073 182.40 0.843 0.013 1426900400074 191.00 0.848 0.013 1426900400075 200.01 0.837 0.014 1426900400076 209.44 0.828 0.014 1426900400077 219.31 0.835 0.014 1426900400078 229.65 0.818 0.014 1426900400079 240.48 0.801 0.014 1426900400080 251.82 0.792 0.014 1426900400081 263.69 0.788 0.014 1426900400082 276.13 0.792 0.014 1426900400083 ENDDATA 71 0 1426900400084 ENDSUBENT 83 0 1426900499999 ENDENTRY 4 0 1426999999999