ENTRY 20139 19831102 00002013900000001 SUBENT 20139001 19831102 00002013900100001 BIB 17 56 2013900100002 INSTITUTE (2ZZZGEL) 2013900100003 REFERENCE (C,66PARIS,2,135,6610) 2013900100004 AUTHOR (K.H.BOECKHOFF, A.DE KEYSER, H.HORSTMANN, W.KOLAR, 2013900100005 H.MARTIN) 2013900100006 TITLE -MEASUREMENT OF THE NEUTRON TOTAL CROSS-SECTION 2013900100007 OF PU-240.- 2013900100008 FACILITY (LINAC) 60 MEV ELECTRON LINEAR ACCELERATOR OF CBNM. 2013900100009 INC-SOURCE .PHOTO ELECTRONS FROM A NATURAL URANIUM 2013900100010 TARGET MODERATED BY A POLYETHYLENE SLAB. 2013900100011 INC-SPECT .NOMINAL RESOLUTION, 2013900100012 FROM 20 EV TO 210 EV 6. NANOSEC/M, 2013900100013 FROM 210 EV TO 310 EV 1.8 NANOSEC/M, 2013900100014 FROM 310 EV TO 800 EV 0.9 NANOSEC/M, 2013900100015 FROM 800 EV TO 5000 EV 0.9 NANOSEC/M, 2013900100016 SAMPLE .METALLIC SAMPLE. 2013900100017 .THREE DISCS OF DIAMETER 7.62+-0.013 CM AND TOTAL 2013900100018 THICKNESS 0.675+-0.002 G/CM2. 2013900100019 .PU ALLOYED WITH 1.15 WEIGHT PER-CENT 2013900100020 ALUMINIUM. 2013900100021 .ISOTOPIC COMPOSITION IN PER-CENT, 2013900100022 PU-238 0.004 +- 0.002, PU-239 1.43 +- 0.02 , 2013900100023 PU-240 97.92 +- 0.04 , PU-241 0.52 +- 0.03 , 2013900100024 PU-242 0.12 +- 0.01. 2013900100025 METHOD (TOF) TIME OF FLIGHT, FLIGHT PATH = 100 M. 2013900100026 .TRANSMISSION MEASUREMENT. 2013900100027 DETECTOR .SLAB OF B-10 POWDER (11*11*2 CM) VIEWED BY 2013900100028 4 NA-I CRYSTALS (4 INCH DIAM. * 3 INCH) AND XP 1040 2013900100029 PHOTOMULTIPLIERS, HEAVILY SHIELDED AGAINST NEUTRONS 2013900100030 AND GAMMA S 2013900100031 PART-DET (N) NEUTRONS. 2013900100032 ANALYSIS (SHAPE) GAMMA AND GAMMA(N)L=0 RESULTED FROM THE 2013900100033 SHAPE ANALYSIS PROGRAMME OF ATTA AND HARVEY, 2013900100034 ORNL-3205 (1961). 2013900100035 .AS ONLY PREDOMINANT RESONANCES COULD BE ANALYSED THEY 2013900100036 ARE SUPPOSED TO BE S-WAVE RESONANCES. 2013900100037 .RESONANCES COULD BE ANALYSED UP TO 700 EV, ABOVE THIS 2013900100038 ENERGY UP TO 5000 EV ONLY RESONANCE ENERGIES ARE GIVEN2013900100039 CORRECTION .DUE TO B-10 OVERLAP FILTERS THE REACTION RATE DUE TO 2013900100040 OVERLAP NEUTRONS WAS LESS THAN 1 PER-CENT. 2013900100041 .RESONANCE PARAMETERS CORRECTED FOR DOPPLER AND 2013900100042 RESOLUTION BROADENING. 2013900100043 .THE DOPPLER CONSTANT HAS BEEN CALCULATED FOR AN 2013900100044 EFFECTIVE TEMPERATURE EQUAL TO ROOM TEMPERATURE. 2013900100045 ERR-ANALYS .GAMMA(N) ARE MORE RELIABLE THAN GAMMA BECAUSE THE 2013900100046 DOPPLER AND RESOLUTION WIDTHS ARE GREATER THAN THE 2013900100047 NATURAL WIDTHS. 2013900100048 .THE ERRORS ARE BASED ON AN UNCERTAINTY OF 15 PER-CENT 2013900100049 IN THE RESOLUTION FUNCTION DUE TO UNCERTAINTIES IN 2013900100050 MODERATION TIME AND BURST WIDTH. 2013900100051 COMMENT .THE TOTAL CROSS-SECTION HAS BEEN EVALUATED BETWEEN 2013900100052 20 EV TO 800 EV, ABOVE 800 EV ONLY SAMPLE-IN 2013900100053 MEASUREMENTS WERE PERFORMED. 2013900100054 STATUS (SPSDD) SUPERSEDED BY J.NUCL.EN.,22(1968)299, 2013900100055 (ENTRY 20117) 2013900100056 HISTORY (720823C) 2013900100057 (730309E) 2013900100058 ENDBIB 56 0 2013900100059 NOCOMMON 0 0 2013900100060 ENDSUBENT 59 0 2013900199999 SUBENT 20139002 19831102 00002013900200001 BIB 3 6 2013900200002 REACTION (94-PU-240(N,TOT),,SIG) 2013900200003 STATUS (UNOBT) UNOBTAINABLE BECAUSE DATA HAS BEEN 2013900200004 REMEASURED WITH MUCH HIGHER RESOLUTION, J.NUCL.EN. 2013900200005 22(1968)299 (ENTRY 20117) 2013900200006 HISTORY (720823C) 2013900200007 (730309E) 2013900200008 ENDBIB 6 0 2013900200009 NOCOMMON 0 0 2013900200010 NODATA 0 0 2013900200011 ENDSUBENT 10 0 2013900299999 SUBENT 20139003 19831102 00002013900300001 BIB 3 5 2013900300002 REACTION (94-PU-240(N,EL),,WID) 2013900300003 STATUS .PUBLISHED IN TABLE 2 OF PARIS CONF. 1966, 2013900300004 VOL.2, P.135. 2013900300005 HISTORY (720823C) 2013900300006 (730309E) 2013900300007 ENDBIB 5 0 2013900300008 NOCOMMON 0 0 2013900300009 NODATA 0 0 2013900300010 ENDSUBENT 9 0 2013900399999 SUBENT 20139004 19831102 00002013900400001 BIB 3 6 2013900400002 REACTION (94-PU-240(N,EL),,WID/RED) 2013900400003 GAMMA(N)L=0. 2013900400004 STATUS .PUBLISHED IN TABLE 2 OF PARIS CONF. 1966, 2013900400005 VOL.2, P.135. 2013900400006 HISTORY (720823C) 2013900400007 (730309E) 2013900400008 ENDBIB 6 0 2013900400009 COMMON 1 3 2013900400010 MOMENTUM L 2013900400011 NO-DIM 2013900400012 0.0000E+00 2013900400013 ENDCOMMON 3 0 2013900400014 NODATA 0 0 2013900400015 ENDSUBENT 14 0 2013900499999 SUBENT 20139005 19831102 00002013900500001 BIB 3 5 2013900500002 REACTION (94-PU-240(N,TOT),,WID) 2013900500003 STATUS .PUBLISHED IN TABLE 2 OF PARIS CONF. 1966, 2013900500004 VOL.2, P.135. 2013900500005 HISTORY (720823C) 2013900500006 (730309E) 2013900500007 ENDBIB 5 0 2013900500008 NOCOMMON 0 0 2013900500009 NODATA 0 0 2013900500010 ENDSUBENT 9 0 2013900599999 SUBENT 20139006 19831102 00002013900600001 BIB 4 6 2013900600002 REACTION (94-PU-240(N,0),,EN) 2013900600003 COMMENT .WEAK RESONANCES. 2013900600004 STATUS .PUBLISHED IN TABLE 2 OF PARIS CONF. 1966, 2013900600005 VOL.2, P.135. 2013900600006 HISTORY (720823C) 2013900600007 (730309E) 2013900600008 ENDBIB 6 0 2013900600009 NOCOMMON 0 0 2013900600010 NODATA 0 0 2013900600011 ENDSUBENT 10 0 2013900699999 SUBENT 20139007 19831102 00002013900700001 BIB 3 5 2013900700002 REACTION (94-PU-240(N,0),,EN) 2013900700003 STATUS .PUBLISHED IN TABLE 3 OF PARIS CONF. 1966, 2013900700004 VOL.2, P.135. 2013900700005 HISTORY (720823C) 2013900700006 (730309E) 2013900700007 ENDBIB 5 0 2013900700008 NOCOMMON 0 0 2013900700009 NODATA 0 0 2013900700010 ENDSUBENT 9 0 2013900799999 ENDENTRY 7 0 2013999999999