ENTRY 20867 19840830 00002086700000001 SUBENT 20867001 19840830 00002086700100001 BIB 15 47 2086700100002 INSTITUTE (2UK NPL) 2086700100003 REFERENCE (J,JP/G,4,(11),1783,78) MAIN REFERENCE. 2086700100004 (J,MET,14,127,78) REFERENCE TO THE FE-56(N,P) 2086700100005 REACTION. 2086700100006 AUTHOR (T.B.RYVES,P.KOLKOWSKI,K.J.ZIEBA) 2086700100007 TITLE -CROSS SECTION MEASUREMENTS OF N-14(N,2N)N-13 , 2086700100008 F-19(N,2N)F-18 , FE-54(N,2N)FE-53 , AL-27(N,P)MG-27 2086700100009 AND AL-27(N,A)NA-24 BETWEEN 14.7 AND 19.0 MEV-. 2086700100010 FACILITY (VDG ) 3 MV VAN DER GRAAFF AND 130 KV SAMES 2086700100011 ACCELERATOR. 2086700100012 INC-SOURCE (D-T ) SOLID TI-T TARGET. 2086700100013 SAMPLE .NATURAL FE (75 MG/CM2). ISOTOPIC ABUNDANCE OF TARGET 2086700100014 91.68 PERCENT. 2086700100015 METHOD (ACTIV) ACTIVATION. 2086700100016 DETECTOR (COIN,PROPC,NAICR) A 4PI BETA GAS FLOW PROPORTIONAL 2086700100017 COUNTER IN COINCIDENCE WITH A NAI CRYSTAL. 2086700100018 (SOLST) USED AS NEUTRON SPECTROMETER MEASURING THE 2086700100019 ALPHA PARTICLES FROM THE SI-28(N,A) REACTION. 2086700100020 MONITOR (26-FE-56(N,P)25-MN-56,,SIG) 2086700100021 DECAY-MON (25-MN-56,2.578HR,B) 2086700100022 .ABSOLUTE BETA EFFICIENCY MEASURED TO 0.73 FOR THE 2086700100023 MN-56 ACTIVITY. 2086700100024 STATUS .DATA TAKEN FROM MAIN REFERENCE. 2086700100025 HISTORY (790404C) CN. 2086700100026 (790518E) 2086700100027 CORRECTION .CORRECTIONS WERE MADE FOR THE AVERAGE GEOMETRICAL 2086700100028 DISTANCE FROM FOILS TO TARGET,NEUTRON ENERGY SPREAD, 2086700100029 ANGULAR SPREAD BETWEEN FOILS AND TARGET,TIME 2086700100030 VARIATION OF NEUTRON FLUX,BUILD-UP OF LOW-ENERGY 2086700100031 NEUTRONS AND NEUTRON SCATTERING AND ATTENUATION 2086700100032 IN THE SAMPLES. 2086700100033 .THE COINCIDENCE DETECTOR COUNT RATE WERE CORRECTED 2086700100034 FOR DEAD-TIME BACKGROUND AND ACCIDENTAL COINCIDENCES. 2086700100035 ERR-ANALYS .UNCERTAINTIES IN THE CROSS SECTIONS WERE OBTAINED 2086700100036 BY SUMMING IN QUADRATURE THE RANDOM UNCERTAINTIES 2086700100037 AT 99 PERCENT CONFIDENCE LEVEL AND THE SYSTEMATIC 2086700100038 UNCERTAINTIES. 2086700100039 .SYSTEMATIC UNCERTAINTIES WERE, 2.5-5.0 PERCENT FOR 2086700100040 THE FE-56(N,P) CROSS SECTION, 1.0 PERCENT FOR BETA 2086700100041 EFFICIENCY DUE TO DECAY SCHEME AND EC, L.T. 0.5 2086700100042 PERCENT FOR BETA+ EFFICIENCY DUE TO POSITION OF 2086700100043 ANNIHILATION, 0-1 PERCENT FOR D-D NEUTRONS (2-5 PER- 2086700100044 CENT AL-27(N,P) AT 18-19 MEV), L.T. 0.8 PERCENT FOR 2086700100045 FOR HALF LIFE, L.T. 0.2 PERCENT FOR MASS, 0.5 PERCENT 2086700100046 FOR DETECTOR CORRECTION FACTOR K, L.T. 0.5 PERCENT 2086700100047 FOR FOIL COMPOSITION AND L.T. 0.3 PERCENT FOR NEUTRON 2086700100048 SCATTERING AND ATTENUATION IN SAMPLES. 2086700100049 ENDBIB 47 0 2086700100050 NOCOMMON 0 0 2086700100051 ENDSUBENT 50 0 2086700199999 SUBENT 20867002 19840227 00002086700200001 BIB 4 8 2086700200002 REACTION (7-N-14(N,2N)7-N-13,,SIG) 2086700200003 SAMPLE .MELAMINE C3H6N6 (35 MG/CM2) EVAPORATED ON AU (150 2086700200004 MG/CM2) AND COVERED WITH AU-VYNS FILM. ISOTOPIC 2086700200005 ABUNDANCE OF TARGET 99.64 PERCENT. 2086700200006 DECAY-DATA (7-N-13,9.97MIN,B) 2086700200007 .ABSOLUTE BETA EFFICIENCY MEASURED TO 0.59. 2086700200008 STATUS .SAMPLE AND DECAY DATA TAKEN FROM TABLE 1 AND CROSS 2086700200009 SECTION DATA FROM TABLE 2. 2086700200010 ENDBIB 8 0 2086700200011 NOCOMMON 0 0 2086700200012 DATA 6 5 2086700200013 EN EN-RSL DATA DATA-ERR MONIT MONIT-ERR 2086700200014 MEV MEV MB MB MB MB 2086700200015 1.4650E+01 1.0000E-01 7.2000E+00 3.0000E-01 1.0820E+02 2.7000E+002086700200016 1.6510E+01 2.5000E-01 9.6000E+00 1.0000E+00 8.0700E+01 2.4000E+002086700200017 1.7350E+01 2.0000E-01 1.1600E+01 8.0000E-01 6.8000E+01 2.0000E+002086700200018 1.8060E+01 1.9000E-01 1.0600E+01 1.2000E+00 6.1000E+01 1.7000E+002086700200019 1.9000E+01 1.9000E-01 1.0500E+01 8.0000E-01 5.2900E+01 2.5000E+002086700200020 ENDDATA 7 0 2086700200021 ENDSUBENT 20 0 2086700299999 SUBENT 20867003 19840227 00002086700300001 BIB 4 9 2086700300002 REACTION (9-F-19(N,2N)9-F-18,,SIG) 2086700300003 SAMPLE .PFTE (CF2)N (28 MG/CM2) COVERED WITH AU-VYNS FILM 2086700300004 FOR BETA COUNTING. ISOTOPIC ABUNDANCE OF TARGET 2086700300005 100 PERCENT. 2086700300006 DECAY-DATA (9-F-18,1.828HR,B) 2086700300007 .ABSOLUTE BETA EFFICIENCY MEASURED TO 0.71. 2086700300008 .ELECTRON CONVERTION 3.0 PERCENT. 2086700300009 STATUS .SAMPLE AND DECAY DATA TAKEN FROM TABLE 1 AND CROSS 2086700300010 SECTION DATA FROM TABLE 2. 2086700300011 ENDBIB 9 0 2086700300012 NOCOMMON 0 0 2086700300013 DATA 6 6 2086700300014 EN EN-RSL DATA DATA-ERR MONIT MONIT-ERR 2086700300015 MEV MEV MB MB MB MB 2086700300016 1.4650E+01 1.0000E-01 4.6900E+01 1.6000E+00 1.0820E+02 2.7000E+002086700300017 1.6060E+01 3.0000E-01 6.4600E+01 2.1000E+00 8.8200E+01 2.4000E+002086700300018 1.6510E+01 2.5000E-01 6.9200E+01 2.2000E+00 8.0700E+01 2.4000E+002086700300019 1.7350E+01 2.0000E-01 7.6000E+01 2.5000E+00 6.8000E+01 2.0000E+002086700300020 1.8060E+01 1.9000E-01 8.1500E+01 2.5000E+00 6.1000E+01 1.7000E+002086700300021 1.9000E+01 1.9000E-01 8.2800E+01 4.0000E+00 5.2900E+01 2.5000E+002086700300022 ENDDATA 8 0 2086700300023 ENDSUBENT 22 0 2086700399999 SUBENT 20867004 19840830 00002086700400001 BIB 4 7 2086700400002 REACTION (26-FE-54(N,2N)26-FE-53,,SIG) 2086700400003 SAMPLE .ISOTOPICALLY ENRICHED (95.6 PERCENT) FE (17 MG/CM2). 2086700400004 DECAY-DATA (26-FE-53-G,8.62MIN,B) 2086700400005 .ABSOLUTE BETA EFFICIENCY MEASURED TO 0.99. 2086700400006 .ELECTRON CONVERTION 2.0 PERCENT. 2086700400007 STATUS .SAMPLE AND DECAY DATA TAKEN FROM TABLE 1 AND CROSS 2086700400008 SECTION DATA FROM TABLE 2. 2086700400009 ENDBIB 7 0 2086700400010 COMMON 1 3 2086700400011 HL 2086700400012 MIN 2086700400013 8.6200E+00 2086700400014 ENDCOMMON 3 0 2086700400015 DATA 6 6 2086700400016 EN EN-RSL DATA DATA-ERR MONIT MONIT-ERR 2086700400017 MEV MEV MB MB MB MB 2086700400018 1.4650E+01 1.0000E-01 1.1900E+01 3.0000E-01 1.0820E+02 2.7000E+002086700400019 1.6060E+01 3.0000E-01 4.4700E+01 2.3000E+00 8.8200E+01 2.4000E+002086700400020 1.6510E+01 2.5000E-01 5.6000E+01 3.7000E+00 8.0700E+01 2.4000E+002086700400021 1.7350E+01 2.0000E-01 7.3100E+01 2.9000E+00 6.8000E+01 2.0000E+002086700400022 1.8060E+01 1.9000E-01 8.7100E+01 4.3000E+00 6.1000E+01 1.7000E+002086700400023 1.9000E+01 1.9000E-01 9.8700E+01 5.9000E+00 5.2900E+01 2.5000E+002086700400024 ENDDATA 8 0 2086700400025 ENDSUBENT 24 0 2086700499999 SUBENT 20867005 19840227 00002086700500001 BIB 4 8 2086700500002 REACTION (13-AL-27(N,P)12-MG-27,,SIG) 2086700500003 SAMPLE .NATURAL AL (160 MG/CM2). 2086700500004 DECAY-DATA (12-MG-27,9.48MIN,B) 2086700500005 .ABSOLUTE BETA EFFICIENCY MEASURED TO 0.62. 2086700500006 .COINCIDENCE GATE SET ON 0.842 AND 1.073 MEV GAMMA 2086700500007 ENERGY. 2086700500008 STATUS .SAMPLE AND DECAY DATA TAKEN FROM TABLE 1 AND CROSS 2086700500009 SECTION DATA FROM TABLE 2. 2086700500010 ENDBIB 8 0 2086700500011 NOCOMMON 0 0 2086700500012 DATA 6 6 2086700500013 EN EN-RSL DATA DATA-ERR MONIT MONIT-ERR 2086700500014 MEV MEV MB MB MB MB 2086700500015 1.4650E+01 1.0000E-01 6.7300E+01 2.0000E+00 1.0820E+02 2.7000E+002086700500016 1.6060E+01 3.0000E-01 8.8200E+01 2.4000E+002086700500017 1.6510E+01 2.5000E-01 8.0700E+01 2.4000E+002086700500018 1.7350E+01 2.0000E-01 4.4300E+01 2.9000E+00 6.8000E+01 2.0000E+002086700500019 1.8060E+01 1.9000E-01 3.8000E+01 2.4000E+00 6.1000E+01 1.7000E+002086700500020 1.9000E+01 1.9000E-01 4.0700E+01 4.1000E+00 5.2900E+01 2.5000E+002086700500021 ENDDATA 8 0 2086700500022 ENDSUBENT 21 0 2086700599999 SUBENT 20867006 19840227 00002086700600001 BIB 4 6 2086700600002 REACTION (13-AL-27(N,A)11-NA-24,,SIG) 2086700600003 SAMPLE .NATURAL AL (160 MG/CM2). 2086700600004 DECAY-DATA (11-NA-24,15.00HR,B) 2086700600005 .ABSOLUTE BETA EFFICIENCY MEASURED TO 0.54. 2086700600006 STATUS .SAMPLE AND DECAY DATA TAKEN FROM TABLE 1 AND CROSS 2086700600007 SECTION DATA FROM TABLE 2. 2086700600008 ENDBIB 6 0 2086700600009 NOCOMMON 0 0 2086700600010 DATA 6 6 2086700600011 EN EN-RSL DATA DATA-ERR MONIT MONIT-ERR 2086700600012 MEV MEV MB MB MB MB 2086700600013 1.4650E+01 1.0000E-01 1.1240E+02 3.1000E+00 1.0820E+02 2.7000E+002086700600014 1.6060E+01 3.0000E-01 8.8200E+01 2.4000E+002086700600015 1.6510E+01 2.5000E-01 8.0700E+01 2.4000E+002086700600016 1.7350E+01 2.0000E-01 7.0700E+01 2.4000E+00 6.8000E+01 2.0000E+002086700600017 1.8060E+01 1.9000E-01 6.2100E+01 2.5000E+00 6.1000E+01 1.7000E+002086700600018 1.9000E+01 1.9000E-01 4.7500E+01 2.4000E+00 5.2900E+01 2.5000E+002086700600019 ENDDATA 8 0 2086700600020 ENDSUBENT 19 0 2086700699999 ENDENTRY 6 0 2086799999999