ENTRY 13821 20020207 00001382100000001 SUBENT 13821001 20020207 00001382100100001 BIB 14 65 1382100100002 INSTITUTE (1USAANL) 1382100100003 REFERENCE (J,PR,183,927,196907) 1382100100004 AUTHOR (A.P.MAGRUDER,R.K.SMITHER) 1382100100005 TITLE 73Ge(n,g)74Ge Gamma-Ray Spectrum and Energy Levels 1382100100006 of Ge74. 1382100100007 FACILITY (REAC,1USAANL) Internal-target facility installed at 1382100100008 CP-5 research reactor. 1382100100009 INC-SOURCE (REAC) Reactor core with a thermal-neutron flux ~3.E+131382100100010 neutrons/cm2/s at the sample position. 1382100100011 SAMPLE Two samples of used (contained in graphite holders) 1382100100012 . natural-abundance Ge02 powder sample (1.43 g Ge 1382100100013 fraction), 1382100100014 . 0.189 g of metallic Ge powder enriched to 84.1% 73Ge.1382100100015 METHOD 73Ge(n,gamma)74Ge transitions identified by ratio 1382100100016 R=0.65(15) of enriched-sample intensity to natural- 1382100100017 sample intensity. 1382100100018 In the low-energy region, both double-escape and 1382100100019 full-energy peaks were considered. 1382100100020 DETECTOR (GELI) Disk-shaped Ge(Li) crystal with active volume 1382100100021 of 4 cm3 used as principal gamma-ray detection device.1382100100022 In an auxiliary experiment two NaI detectors used with 1382100100023 the Ge(Li) detector in pair-spectrometer mode to 1382100100024 distinguish double-escape peaks from single-escape 1382100100025 and full-energy peaks. 1382100100026 MONITOR ((MONIT1)6-C-12(N,G)6-C-13,,SIG,,MXW) 1382100100027 ((MONIT2)32-GE-73(N,G)32-GE-74,,SIG,,MXW) 1382100100028 Absolute intensities of 69 and 31 (gammas/100 neutron 1382100100029 captures) of 4.946 and 3.684 MeV gammas, respectively,1382100100030 from 12C(n,gamma)13C used for normalization. 1382100100031 Energy calibrated using annihilation radiation at 1382100100032 511.006(2) keV, 12C(n,gamma)13C line at 4946.0(10) 1382100100033 keV, and 14N(n,gamma)15N line at 10830.0(10) keV. 1382100100034 Intensity calibrated using relative efficiency of 1382100100035 Ge(Li) detector crystal obtained as a function of 1382100100036 gamma-ray energy using: 1382100100037 1) small irradiated sample of 179Hf for very low 1382100100038 energy end of the spectrum, 1382100100039 2) 113Cd(n,gamma)114Cd reaction for determining 1382100100040 full-energy-peak efficiency curve in the region 1382100100041 0.558-1.660 MeV by comparing with measurements from 1382100100042 bent-crystal spectrometer at ANL. 1382100100043 60Co radioactive source and gamma rays from beryllium, 1382100100044 nitrogen, and carbon sources employed to obtain 1382100100045 double-escape efficiency curve. 1382100100046 ERR-ANALYS (E-ERR) Uncertainties in gamma-ray energies including: 1382100100047 . 0.6-keV error due to variation in pulser calibration1382100100048 curve, 1382100100049 . errors in peak position relative to secondary 1382100100050 calibration lines, 1382100100051 . systematic error from error in primary calibration 1382100100052 lines. 1382100100053 (DATA-ERR) Uncertainties in line intensities including 1382100100054 . error in proportionality factor between 1382100100055 observed peak areas and absolute intensity of carbon1382100100056 lines (11%), 1382100100057 . error due to uncertainty in neutron-capture 1382100100058 cross sections and to uncertainty in carbon holder 1382100100059 effective as a source for Ge(Li) detector (~17%), 1382100100060 . (raw intensity) error in the area under gamma peak. 1382100100061 Combination of first two contributions placed lower 1382100100062 limit of 20% on errors. 1382100100063 ADD-RES Energy of the capture state in the compound nucleus 1382100100064 (73Ge+n) found to be 10203.1(9) keV. 1382100100065 STATUS Data taken from Table III and Table IV of reference. 1382100100066 HISTORY (20020201C) IS + VM 1382100100067 ENDBIB 65 0 1382100100068 COMMON 5 3 1382100100069 EN-DUMMY MONIT1 MONIT1-ERR MONIT2 MONIT2-ERR 1382100100070 EV MB MB MB MB 1382100100071 0.0253 3.3 0.2 13.7 1.2 1382100100072 ENDCOMMON 3 0 1382100100073 ENDSUBENT 72 0 1382100199999 SUBENT 13821002 20020207 00001382100200001 BIB 1 1 1382100200002 REACTION (32-GE-73(N,G)32-GE-74,,SPC,,SPA) 1382100200003 ENDBIB 1 0 1382100200004 NOCOMMON 0 0 1382100200005 DATA 5 132 1382100200006 E E-ERR DATA DATA-ERR DATA-MAX 1382100200007 KEV KEV PC/REAC PC/REAC PC/REAC 1382100200008 289.2 2.5 0.40 0.12 1382100200009 468.4 1.2 0.73 0.11 1382100200010 493.0 0.8 5.36 0.59 1382100200011 530.9 1.1 0.39 0.09 1382100200012 542.3 1.4 0.20 0.09 1382100200013 558.4 1.4 0.42 0.10 1382100200014 596.3 0.4 49.9 5.0 1382100200015 608.6 0.4 12.2 1.3 1382100200016 638.6 1.2 0.30 0.10 1382100200017 653.4 1.4 0.35 0.10 1382100200018 702.2 0.8 3.15 0.34 1382100200019 732.6 1.2 0.20 0.09 1382100200020 738.8 1.2 0.33 0.09 1382100200021 771.2 1.2 0.70 0.12 1382100200022 787.0 1.2 0.48 0.10 1382100200023 809.8 0.8 0.61 0.10 1382100200024 869.9 0.8 26.8 2.7 1382100200025 882.2 1.2 1.03 1382100200026 941.4 0.8 1.30 0.14 1382100200027 956.4 1.2 0.43 0.09 1382100200028 963.5 0.8 6.07 0.65 1382100200029 982.8 1.2 0.10 0.07 1382100200030 1001.7 0.8 1.80 0.19 1382100200031 1057.2 1.2 0.21 0.05 1382100200032 1103.4 0.9 8.95 0.90 1382100200033 1108.9 1.2 2.05 0.21 1382100200034 1132.8 0.8 2.23 0.24 1382100200035 1204.9 0.6 6.34 0.63 1382100200036 1229.9 1.2 0.72 0.10 1382100200037 1335.3 1.6 0.51 0.09 1382100200038 1385.9 1.2 0.81 0.11 1382100200039 1473.5 0.9 3.71 0.30 1382100200040 1490.9 1.2 0.88 0.11 1382100200041 1511.8 1.2 1.67 0.18 1382100200042 1577.2 1.2 0.59 0.09 1382100200043 1604.3 2.2 0.11 0.05 1382100200044 1621.1 1.2 0.74 0.10 1382100200045 1635.8 1.7 1.07 0.13 1382100200046 1643.3 1.7 0.75 0.10 1382100200047 1678.7 1.7 0.56 0.09 1382100200048 1701.1 2.1 0.09 0.04 1382100200049 1714.0 2.1 0.40 0.16 1382100200050 1757.6 2.1 0.20 0.07 1382100200051 1780.2 2.1 0.61 0.07 1382100200052 1811.3 1.6 0.34 0.11 1382100200053 1832.6 1.2 0.33 0.08 1382100200054 1845.8 1.2 0.61 0.10 1382100200055 1876.0 1.2 0.28 0.08 1382100200056 1914.2 2.1 0.27 0.08 1382100200057 1943.4 1.0 2.01 0.25 1382100200058 2016.8 1.3 0.53 0.09 1382100200059 2040.3 2.1 0.1 1382100200060 2075.3 1.3 0.91 0.12 1382100200061 2099.2 1.3 0.27 0.10 1382100200062 2155.4 3.0 0.2 1382100200063 2174.0 1.3 0.35 0.10 1382100200064 2187.2 2.2 0.2 1382100200065 2200.0 1.3 0.21 0.09 1382100200066 2214.2 1.3 0.37 0.09 1382100200067 2236.7 3.0 0.4 1382100200068 2266.1 1.3 0.71 0.10 1382100200069 2282.0 3.0 0.24 1382100200070 2317.7 2.2 0.35 0.08 1382100200071 2332.4 1.3 0.45 0.08 1382100200072 2357.3 1.6 0.37 0.08 1382100200073 2368.8 1.3 0.36 0.08 1382100200074 2389.6 3.0 0.2 1382100200075 2455.7 2.2 0.21 0.06 1382100200076 2472.7 2.2 0.15 0.06 1382100200077 2512.9 1.3 0.15 0.06 1382100200078 2533.8 1.3 0.39 0.08 1382100200079 2569.9 1.6 0.23 0.07 1382100200080 2585.1 1.6 0.28 0.07 1382100200081 2621.8 2.2 0.08 0.04 1382100200082 2693.1 1.3 0.41 0.06 1382100200083 2700.7 1.7 0.36 0.06 1382100200084 2744.6 2.2 0.22 0.05 1382100200085 2755.1 2.2 0.13 0.05 1382100200086 2771.1 2.2 0.10 0.05 1382100200087 2788.1 1.3 0.61 0.07 1382100200088 2833.3 1.6 0.21 0.06 1382100200089 2880.6 1.3 0.33 0.03 1382100200090 2909.4 2.2 0.12 0.04 1382100200091 2953.6 2.2 0.11 0.04 1382100200092 2978.6 2.2 0.10 0.04 1382100200093 6131.6 2.2 0.062 0.011 1382100200094 6166.3 2.5 0.106 0.013 1382100200095 6173.8 2.2 0.368 0.038 1382100200096 6182.5 2.5 0.067 0.012 1382100200097 6188.7 2.5 0.097 0.012 1382100200098 6201.2 1.2 0.570 0.060 1382100200099 6243.5 1.5 0.066 0.010 1382100200100 6272.1 1.7 0.310 0.034 1382100200101 6280.6 2.2 0.047 0.009 1382100200102 6347.3 2.3 0.042 0.010 1382100200103 6363.7 1.2 0.548 0.056 1382100200104 6407.7 1.5 0.232 0.025 1382100200105 6466.9 2.8 0.040 0.008 1382100200106 6474.2 1.5 0.046 0.009 1382100200107 6490.3 1.5 0.218 0.024 1382100200108 6518.5 3.0 0.032 0.007 1382100200109 6545.5 1.3 0.246 0.028 1382100200110 6568.1 2.2 0.013 0.006 1382100200111 6682.1 1.2 0.478 0.044 1382100200112 6694.4 2.8 0.130 0.015 1382100200113 6719.4 1.4 0.585 0.059 1382100200114 6787.1 1.3 0.428 0.044 1382100200115 6804.8 1.7 0.035 0.009 1382100200116 6816.0 1.3 0.432 0.044 1382100200117 6841.6 2.2 0.028 0.006 1382100200118 6881.2 1.6 0.069 0.010 1382100200119 6926.7 1.4 0.278 0.029 1382100200120 6975.4 2.2 0.130 0.015 1382100200121 7021.8 1.2 0.288 0.030 1382100200122 7093.3 1.3 0.834 0.084 1382100200123 7116.4 1.4 0.101 0.012 1382100200124 7149.4 1.4 0.189 0.020 1382100200125 7163.6 1.4 0.128 0.014 1382100200126 7224.2 1.3 0.481 0.049 1382100200127 7262.3 1.3 1.49 0.15 1382100200128 7273.0 2.8 0.067 0.009 1382100200129 7369.1 1.4 0.311 0.032 1382100200130 7504.1 1.4 0.453 0.046 1382100200131 7528.9 1.8 0.060 0.009 1382100200132 7629.5 1.3 0.154 0.017 1382100200133 7664.9 1.8 0.030 0.005 1382100200134 8002.2 2.2 0.007 0.003 1382100200135 8034.5 1.4 0.624 0.063 1382100200136 8502.5 1.3 0.451 0.046 1382100200137 8736.4 1.3 0.574 0.058 1382100200138 8997.7 1.4 0.007 0.002 1382100200139 9606.0 1.7 0.036 0.004 1382100200140 ENDDATA 134 0 1382100200141 ENDSUBENT 140 0 1382100299999 ENDENTRY 2 0 1382199999999