ENTRY 22225 19961016 00002222500000001 SUBENT 22225001 19961016 00002222500100001 BIB 13 57 2222500100002 INSTITUTE (2UK NPL) 2222500100003 REFERENCE (J,ANE,17,(12),657,90) 2222500100004 AUTHOR (T.B.RYVES,P.KOLKOWSKI) 2222500100005 TITLE -THE DIFFERENTIAL CROSS SECTION FOR NEUTRON-PROTON 2222500100006 SCATTERING AT 14.5 MEV. 2222500100007 FACILITY .SAMES ACCELERATOR OF NPL. 2222500100008 INC-SOURCE (D-T ) A 150 KEV DEUTERON BEAM OF UP TO 5 MICROAMPS, 2222500100009 COLLIMATED TO 8 MM DIAMETER, WAS DIRECTED ONTO A SOLID2222500100010 TI-T TARGET, 4 CI, 1 MG/CM2. THE TITANIUM WAS EVAPORA-2222500100011 TED ON A PURE ALUMINUM BACKING, 0.5 MM THICK AND 4.1 2222500100012 CM DIAMETER. THE TARGET WAS INCLINED 45 DEGREES WITH 2222500100013 RESPECT TO THE BEAM, AND WAS COOLED WITH A JET OF AIR.2222500100014 METHOD (ASSOP) THE NEUTRON FLUENCE WAS DETERMINED WITH THE 2222500100015 ASSOCIATED PARTICLE TECHNIQUES, BY DETECTING THE ALPHA2222500100016 PARTICLES. 2222500100017 (COINC) A PROTON RECOIL TELESCOPE WAS USED TO DETERMINE2222500100018 THE N-P SCATTERING CROSS SECTIONS. 2222500100019 MONITOR . ABSOLUTE MEASUREMENTS 2222500100020 DETECTOR (SOLST) THE ASSOCIATED ALPHA PARTICLES WERE DETECTED 2222500100021 WITH A SILICON DETECTOR, HAVING A 4 MM DIAMETER APER- 2222500100022 TURE, MOUNTED ABOUT 1 M FROM THE TARGET, AND AT AN 2222500100023 ANGLE OF 90 DEGREES WITH RESPECT TO THE BEAM. 2222500100024 (LONGC) IN ADDITION, A LONGCOUNTER, SITUATED AT 5 M 2222500100025 FROM THE TARGET, WAS USED TO MONITOR THE FLUX STABILI-2222500100026 TY AND TARGET QUALITY. 2222500100027 (TELES,SOLST,PROPC) THE PROTON RECOIL TELESCOPE HAD A 2222500100028 24.322 MG/CM2 CH2 RADIATOR, 1.125 CM IN RADIUS, AND 2222500100029 CONTAINING 2.088E+21 ATOMS OF HYDROGEN/CM2. THE DETEC-2222500100030 TOR APERTURE HAD A RADIUS OF 0.75015 CM, AND WAS SITU-2222500100031 ATED 12.666 CM FROM THE RADIATOR. THE DETECTOR SYSTEM 2222500100032 CONSISTED OF PROPORTIONAL COUNTERS AND A SILICON SAND-2222500100033 WICH DETECTOR. THE PROPORTIONAL COUNTERS WERE OPERATED2222500100034 WITH A CONTINUOUS FLOW OF 95 PER-CENT AR AND 5 PER- 2222500100035 CENT CO2 GAS AT PRESSURES OF 760 AND 400 TORR FOR THE 2222500100036 0 AND 35 DEGREE MEASUREMENTS. THE SILICON SANDWICH DE-2222500100037 TECTOR CONSISTED OF TWO FULLY DEPLETED SURFACE BARRIER2222500100038 DELTA-E DETECTORS, 100 AND 250 MICROMETERS THICK, 2222500100039 WORKING IN COINCIDENCE MODE. THE TELESCOPE WAS POSI- 2222500100040 TIONED NORMAL TO THE TARGET AT A DISTANCE OF ABOUT 20 2222500100041 CM, AND COULD BE ROTATED AROUND A VERTICAL AXIS 2222500100042 THROUGH THE RADIATOR, FOR MEASUREMENTS AT DIFFERENT 2222500100043 ANGLES. 10 MEASUREMENTS WERE MADE AT EACH OF 0 AND 2222500100044 +/- 35 DEGREES SCATTERING ANGLE. 2222500100045 CORRECTION .CORRECTIONS WERE MADE FOR DEAD-TIME LOSSES IN THE AL- 2222500100046 PHA COUNTING, BACKGROUND FROM CARBON IN THE RADIATOR, 2222500100047 TARGET-SCATTERED NEUTRONS, PROTONS SCATTERED IN THE 2222500100048 PRT APERTURE, PROTON REACTIONS IN SILICON, AND DEAD- 2222500100049 TIME IN THE PRT ELECTRONICS. THE CALCULATED PRT EFFI- 2222500100050 CIENCY WAS CONSIDERED TO BE EXACT. 2222500100051 ERR-ANALYS (ERR-T) THE 180 DEGREE CROSS SECTION AND 2222500100052 THE 110/180 DEGREE CROSS SECTION RATIO HAS 2222500100053 THE ERRORS CONTRIBUTIONS GIVEN IN PROPER SUBENTS 2222500100054 STATUS .DATA OBTAINED FROM MAIN REF. 2222500100055 HISTORY (921212C) N.O. 2222500100056 (930329E) 2222500100057 (961016A) + + ENTRY CORRECTED BY S. MAEV 2222500100058 INCIDENT NEUTRON ENERGY PUT IN SAN 001 2222500100059 ENDBIB 57 0 2222500100060 COMMON 1 3 2222500100061 EN 2222500100062 MEV 2222500100063 1.4470E+01 2222500100064 ENDCOMMON 3 0 2222500100065 ENDSUBENT 64 0 2222500199999 SUBENT 22225002 19961016 00002222500200001 BIB 5 22 2222500200002 REACTION 1(1-H-1(N,EL)1-H-1,,DA) 2222500200003 2(1-H-1(N,EL)1-H-1,,DA) 2222500200004 PART-DET (P ) 2222500200005 ANALYSIS 1 ENDF/B-V USED TO CALCULATE THE PRT EFFICIENCY. 2222500200006 2 ENDF/B-VI USED TO CALCULATE THE PRT EFFICIENCY. 2222500200007 HISTORY (961016U) POINTER FORMALISM USED INSTEAD OF FLAGS 2222500200008 ENERGY TRNSFERRED IN SUBENT 001. 2222500200009 ERROR STRUCTURE GIVEN 2222500200010 ERR-ANALYS (ERR-S) STATISTICAL ERROR 0.4 2222500200011 (ERR-1) DEAD-TIME ERROR 0.1 2222500200012 (ERR-2) RADIATOR COMPOSITION, CH2 ERROR 0.1 2222500200013 (ERR-3) PRT INTERNAL GEOMETRY ERROR 0.5 2222500200014 (ERR-4) DISTANCE TO TARGET ERROR 0.4 2222500200015 (ERR-5) ATTENUATION OF NEUTRONS ERROR 0.2 2222500200016 (ERR-6) PEAK ANALYSIS, INCL SCATTERING ERROR 0.5 2222500200017 (ERR-7) LOST COUNTS IN PHA ERROR 0.2 2222500200018 (ERR-8) P LOSS IN COUNTER WIRES ERROR 0.1 2222500200019 (ERR-9) P LOSS IN SI REACTIONS ERROR 0.2 2222500200020 (ERR-10) NEUTRON FLUENCE FROM ASSOP ERROR 1.0 2222500200021 -------------------------------------------- 2222500200022 TOTAL 1.4 2222500200023 . 2222500200024 ENDBIB 22 0 2222500200025 COMMON 12 6 2222500200026 ERR-S ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 2222500200027 ERR-6 ERR-7 ERR-8 ERR-9 ERR-10 ERR-T 2222500200028 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2222500200029 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2222500200030 0.4 0.1 0.1 0.5 0.4 0.2 2222500200031 0.5 0.2 0.1 0.2 1.0 1.4 2222500200032 ENDCOMMON 6 0 2222500200033 DATA 5 1 2222500200034 ANG-CM DATA 1ERR-T 1DATA 2ERR-T 2 2222500200035 ADEG MB/SR MB/SR MB/SR MB/SR 2222500200036 1.8000E+02 5.7200E+01 8.0000E-01 5.7100E+01 8.0000E-01 2222500200037 ENDDATA 3 0 2222500200038 ENDSUBENT 37 0 2222500299999 SUBENT 22225003 19961016 00002222500300001 BIB 3 12 2222500300002 REACTION ((1-H-1(N,SCT)1-H-1,,DA,P)//(1-H-1(N,SCT)1-H-1,,DA,P)) 2222500300003 HISTORY (961016U) REACTION SF7-'P' INTRODUCED.'EN' MOVED 2222500300004 IN SUBENT 001. ERROR STRUCTURE GIVEN 2222500300005 ERR-ANALYS (ERR-S) STATISTICAL ERROR 0.6 2222500300006 (ERR-1) DISTANCE TO TARGET ERROR 0.2 2222500300007 (ERR-2) ATTENUATION OF NEUTRONS ERROR 0.1 2222500300008 (ERR-3) PEAK ANALYSIS, INCL SCATTERING,ERROR 0.3 2222500300009 (ERR-4) P LOSS IN COUNTER WIRES ERROR 0.1 2222500300010 (ERR-5) P LOSS IN SI REACTIONS ERROR 0.2 2222500300011 -------------------------------------------- 2222500300012 TOTAL 0.7 2222500300013 . 2222500300014 ENDBIB 12 0 2222500300015 COMMON 6 3 2222500300016 ERR-S ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 2222500300017 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2222500300018 0.6 0.2 0.1 0.3 0.1 0.2 2222500300019 ENDCOMMON 3 0 2222500300020 DATA 5 1 2222500300021 ANG-NM ANG-DN DATA ERR-T ERR-T 2222500300022 ADEG ADEG NO-DIM NO-DIM PER-CENT 2222500300023 3.5000E+00 0.0000E+00 7.8900E-01 6.0000E-03 7.0000E-01 2222500300024 ENDDATA 3 0 2222500300025 ENDSUBENT 24 0 2222500399999 SUBENT 22225004 19961016 00002222500400001 BIB 3 17 2222500400002 REACTION ((1-H-1(N,SCT)1-H-1,,DA,P)//(1-H-1(N,SCT)1-H-1,,DA,P)) 2222500400003 ERR-ANALYS (ERR-S) STATISTICAL ERROR 0.4 2222500400004 (ERR-1) DEAD-TIME ERROR 0.1 2222500400005 (ERR-2) RADIATOR COMPOSITION, CH2 ERROR 0.1 2222500400006 (ERR-3) PRT INTERNAL GEOMETRY ERROR 0.5 2222500400007 (ERR-4) DISTANCE TO TARGET ERROR 0.4 2222500400008 (ERR-5) ATTENUATION OF NEUTRONS ERROR 0.2 2222500400009 (ERR-6) PEAK ANALYSIS, INCL SCATTERING ERROR 0.5 2222500400010 (ERR-7) LOST COUNTS IN PHA ERROR 0.2 2222500400011 (ERR-8) P LOSS IN COUNTER WIRES ERROR 0.1 2222500400012 (ERR-9) P LOSS IN SI REACTIONS ERROR 0.2 2222500400013 (ERR-10) NEUTRON FLUENCE FROM ASSOP ERROR 1.0 2222500400014 -------------------------------------------- 2222500400015 TOTAL 1.4 2222500400016 . 2222500400017 HISTORY (961016U) REACTION SF7='P' INTRODUCED. 2222500400018 EN MOVED IN SUBENT 001. ERROR STRUCTURE GIVEN 2222500400019 ENDBIB 17 0 2222500400020 COMMON 11 6 2222500400021 ERR-S ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 2222500400022 ERR-6 ERR-7 ERR-8 ERR-9 ERR-10 2222500400023 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2222500400024 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2222500400025 0.4 0.1 0.1 0.5 0.4 0.2 2222500400026 0.5 0.2 0.1 0.2 1.0 2222500400027 ENDCOMMON 6 0 2222500400028 DATA 5 1 2222500400029 ANG-NM ANG-DN DATA ERR-T ERR-T 2222500400030 ADEG ADEG NO-DIM NO-DIM PER-CENT 2222500400031 0.0000E+00 4.5000E+01 1.0530E+00 1.5000E-02 1.4000E-00 2222500400032 ENDDATA 3 0 2222500400033 ENDSUBENT 32 0 2222500499999 ENDENTRY 4 0 2222599999999