ENTRY 20141 19831102 00002014100000001 SUBENT 20141001 19831102 00002014100100001 BIB 13 27 2014100100002 INSTITUTE (2ZZZGEL) 2014100100003 REFERENCE (C,68WASH,1,491,6803) 2014100100004 AUTHOR (A.J.DERUYTTER, J.SPAEPEN, P.PELFER) 2014100100005 TITLE -PRECISE 2200 M/S FISSION CROSS-SECTION OF U-235.- 2014100100006 FACILITY .BELGIAN BR2 HIGH FLUX REACTOR. 2014100100007 (CHOPS) SLOW CHOPPER, BURST WIDTH 25 MU-SEC, 184 HZ.2014100100008 INC-SOURCE (REAC) THE SLOW CHOPPER WAS INSTALLED AT THE 2014100100009 TANGENTIAL BEAM TUBE T-7 OF THE BR2-REACTOR. 2014100100010 SAMPLE .FOUR SAMPLES OF EVAPORATED U-F(4) LAYERS 2014100100011 .ISOTOPIC COMPOSITION IN PERCENT, 2014100100012 U-234 1.0812+-0.0020, U-235 93.336+-0.010, 2014100100013 U-236 0.2027+-0.0006, U-238 5.380+-0.005. 2014100100014 METHOD (TOF) TIME OF FLIGHT, FLIGHT PATH = 2003.6+-0.2 MM2014100100015 DETECTOR (SOLST) ONE LARGE AU-SI SURFACE BARRIER DETECTOR WAS2014100100016 USED FOR THE DETECTION OF BOTH FISSION FRAGMENTS AND 2014100100017 ALPHA PARTICLES FROM B-10(N,ALPHA) REACTION FROM 2014100100018 NATURAL BORON SAMPLES USED AS STANDARD. 2014100100019 MONITOR (5-B-10(N,A)3-LI-7,,SIG) 2014100100020 = 3834+-5 BARN AT 2200 M/SEC EVALUATED FROM 2014100100021 LITTERATURE BETWEEN 1960 AND 1967. 2014100100022 STATUS .TAKEN FROM 1968 WASHINGTON CONF.,VOL.1,P.491. 2014100100023 (SPSDD) SUPERSEDED BY 1970 HELSINKI CONFERENCE, 2014100100024 VOL.1, P.117. (SUBENTRY 20143.002). 2014100100025 HISTORY (720821C) 2014100100026 (730309E) 2014100100027 ERR-ANALYS .THE TOTAL ERROR IS 0.60 PER-CENT. ITS COMPOSITION 2014100100028 IS GIVEN IN TABLE 3 OF REFERENCE. 2014100100029 ENDBIB 27 0 2014100100030 COMMON 1 3 2014100100031 EN 2014100100032 MEV 2014100100033 2.5300E-08 2014100100034 ENDCOMMON 3 0 2014100100035 ENDSUBENT 34 0 2014100199999 SUBENT 20141002 19831102 00002014100200001 BIB 6 13 2014100200002 REACTION (92-U-235(N,F),,SIG) 2014100200003 2200 M/SEC CROSS-SECTION. 2014100200004 ANALYSIS .LINEAR FIT FROM 20 CHANNELS BETWEEN 0.014 2014100200005 AND 0.063 EV. 2014100200006 PART-DET (FF) FISSION FRAGMENTS. 2014100200007 COMMENT .A VALUE OF 581.0+-5.4 BARN IS OBTAINED USING A HALF- 2014100200008 LIFE OF (2.470+-0.020)*1.E+5 YEAR, EVALUATED FROM 2014100200009 LITTERATURE. 2014100200010 HISTORY (720821C) 2014100200011 (730309E) 2014100200012 CORRECTION .U-234 ALPHA BACKGROUND SUBTRACTED ASSUMING A HALF- 2014100200013 LIFE OF (2.443+-0.005)*1.E+5 YEAR, (SPERNOL AND LAUER,2014100200014 CBNM PRIVATE COMMUNICATION) 2014100200015 ENDBIB 13 0 2014100200016 NOCOMMON 0 0 2014100200017 NODATA 0 0 2014100200018 ENDSUBENT 17 0 2014100299999 SUBENT 20141003 19831102 00002014100300001 BIB 6 11 2014100300002 REACTION (92-U-235(N,F),,SIG) 2014100300003 2200 M/SEC CROSS-SECTION. 2014100300004 ANALYSIS .LINEAR FIT FROM 5 CHANNELS BETWEEN 0.0213 2014100300005 AND 0.0302 EV. 2014100300006 PART-DET (FF) FISSION FRAGMENTS. 2014100300007 HISTORY (720821C) 2014100300008 (730309E) 2014100300009 CORRECTION .U-234 ALPHA BACKGROUND SUBTRACTED ASSUMING A HALF- 2014100300010 LIFE OF (2.443+-0.005)*1.E+5 YEAR, (SPERNOL AND LAUER,2014100300011 CBNM PRIVATE COMMUNICATION) 2014100300012 ERR-ANALYS .THE STATISTICAL ERROR COMPONENT IS 0.56 PER-CENT HERE.2014100300013 ENDBIB 11 0 2014100300014 NOCOMMON 0 0 2014100300015 NODATA 0 0 2014100300016 ENDSUBENT 15 0 2014100399999 ENDENTRY 3 0 2014199999999