ENTRY 20782 20220218 23102078200000001 SUBENT 20782001 20220218 23102078200100001 BIB 15 28 2078200100002 TITLE Determination of the neutron binding energy of the 2078200100003 delayed neutron emitter Xe-137 2078200100004 AUTHOR (B.Fogelberg,W.Mampe) 2078200100005 REFERENCE (J,ZP/A,281,89,1977) 2078200100006 (W,FOGELBERG,19780428) 2078200100007 INSTITUTE (2FR ILL,2SWDSWR) 2078200100008 FACILITY (REAC,2FR ILL) ILL high flux reactor in Grenoble. 2078200100009 INC-SOURCE (REAC ) Very pure thermal beam with a flux of about 2078200100010 10**9 n/cm2.5, collimated to a 2cm diam. 2078200100011 SAMPLE Sample of Xe gas enriched to 91.2 pc in Xe-136, 2078200100012 contained in a 3x3x1 cm3 bubble made of 4 mg/cm2 2078200100013 Al foil and placed in the n-beam. 2078200100014 METHOD (SITA,TRN) 2078200100015 Transmission measurements. 2078200100016 Two background runs with empty gas containers made 2078200100017 as well as runs with natural Xe gas and energy 2078200100018 calibration runs using a Co-56 source. 2078200100019 DETECTOR (GELI ) The gas container was viewed by a 80 cm3 2078200100020 Ge(Li) detector through a 15 cm long lead collimator. 2078200100021 ANALYSIS Evaluation of gamma-ray spectra. 2078200100022 COMMENT Binding energy was deduced from the spectrum and 2078200100023 determined to 4025.2+-0.6 keV. 2078200100024 CORRECTION Data corrected for background. 2078200100025 ERR-ANALYS (DATA-ERR) No information about source of uncertainty 2078200100026 STATUS (TABLE) Tbl. I from Z.Physik A281(1977)89. 2078200100027 HISTORY (19780428C) 2078200100028 (20220218A) SD:Updated to new date formats,lower case. 2078200100029 Entry revised. Corrections in all Subents. 2078200100030 ENDBIB 28 0 2078200100031 COMMON 1 3 2078200100032 DATA-ERR 2078200100033 PER-CENT 2078200100034 10. 2078200100035 ENDCOMMON 3 0 2078200100036 ENDSUBENT 35 0 2078200199999 SUBENT 20782002 20220218 23102078200200001 BIB 5 12 2078200200002 REACTION (54-XE-136(N,G)54-XE-137,,SPC) 2078200200003 ANALYSIS An extra calibration point at low energy was provided 2078200200004 by the 455.490keV line following the decay of 137Xe. 2078200200005 This decay reaches equilibrium with the neutron 2078200200006 capture rate within a few minutes of irradiation. The 2078200200007 intensities of the neutron capture lines could thus 2078200200008 be normalized using the known intensity of 32%/decay 2078200200009 for the 455.490 keV line. 2078200200010 MONITOR (54-XE-136(N,G)54-XE-137,,SPC) 2078200200011 MONIT-REF (,M.J.Martin,R,ORNL-4923,1973) 2078200200012 HISTORY (20220218A) SD: MONITOR/REF added. Value at 455.490 keV2078200200013 moved to MONIT. NO-DIM -> PC/REAC. E-LVL -> E. 2078200200014 ENDBIB 12 0 2078200200015 COMMON 3 3 2078200200016 EN-DUMMY E-NRM MONIT 2078200200017 EV KEV PC/REAC 2078200200018 2.53E-02 4.5549E+02 0.32 2078200200019 ENDCOMMON 3 0 2078200200020 DATA 3 4 2078200200021 E E-ERR DATA 2078200200022 KEV KEV PC/REAC 2078200200023 601.0 0.2 0.94 2078200200024 1302.6 0.4 0.17 2078200200025 2184.2 0.4 0.094 2078200200026 3424.2 0.4 0.42 2078200200027 ENDDATA 6 0 2078200200028 ENDSUBENT 27 0 2078200299999 ENDENTRY 2 0 2078299999999