ENTRY 22094 19890530 00002209400000001 SUBENT 22094001 19890530 00002209400100001 BIB 13 65 2209400100002 REFERENCE (C,88MITO,1021,88) 2209400100003 TITLE -MEASUREMENT OF AL-27(N,P)MG-27 ACTIVATION CROSS 2209400100004 SECTION. 2209400100005 AUTHOR (K.KUDO,T.KINOSHITA,Y.HINO,A.FUKUDA,Y.KAWADA, 2209400100006 K.TAKEUCHI,A.IWAHARA) 2209400100007 INSTITUTE (2JPNTSU) 2209400100008 (2JPNSHR) K.T. 2209400100009 (3BZLBZL) A.I. 2209400100010 FACILITY (VDG) A 4 MV VAN DE GRAAFF ACCELERATOR WAS USED FOR 2209400100011 PRODUCING NEUTRONS OF ENERGIES IN THE RANGE 5 - 19.9 2209400100012 MEV. 2209400100013 (CCW) A COCKCROFT-WALTON ACCELERATOR WAS USED FOR PRO- 2209400100014 DUCING NEUTRONS OF 14.6 MEV ENERGY. 2209400100015 INC-SOURCE (D-T) THE TRITIUM TARGET WAS ABSORBED IN A 0.4 MG/CM2 2209400100016 THICK TITANIUM LAYER, EVAPORATED ON A 0.25 MM THICK 2209400100017 COPPER BACKING. THIS TARGET WAS USED TO PRODUCE 2209400100018 NEUTRONS FROM 14.6 TO 19.9 MEV. 2209400100019 (D-D) A SIMILAR DEUTERIUM TARGET WAS USED TO PRODUCE 2209400100020 5 MEV NEUTRONS. 2209400100021 METHOD (ACTIV) 2209400100022 DETECTOR (HPGE) THE ACTIVITIES WERE MEASURED WITH A CALIBRATED 2209400100023 PURE GERMANIUM DETECTOR, OR BY 2209400100024 (D4PI) A 4PI-BETA-GAMMA SPECTROMETER. 2209400100025 SAMPLE .ALUMINIUM FOILS OF PURITY EXCEEDING 99.99 PERCENT AND 2209400100026 WITH THICKNESSES RANGING FROM 0.05 TO 0.5 MM WITH THE 2209400100027 DIAMETER 25.4 MM WERE USED. THE SAMPLES WERE 2209400100028 IRRADIATED FOR ABOUT 30 MIN WITH A DEUTERIUM BEAM 2209400100029 CURRENT OF 3 - 10 MICROAMPS. FOR THE MEASUREMENTS AT 2209400100030 14.6 MEV THE SAMPLES WERE PLACED AT AN ANGLE OF 45 2209400100031 DEGREES WITH RESPECT TO THE DEUTERON BEAM, WHILE AT 2209400100032 THE OTHER ENERGIES THE SAMPLES WERE PLACED AT 0 2209400100033 DEGREES. THE DISTANCE FROM THE SOURCE TO THE SAMPLES 2209400100034 WAS 50 TO 100 MM. 2209400100035 CORRECTION .THE DATA WERE CORRECTED FOR CONTRIBUTIONS FROM THE 2209400100036 D+D NEUTRONS IN THE D+T NEUTRON FIELD, AND FOR BACK- 2209400100037 GROUND NEUTRONS FROM THE TARGET ASSEMBLY AND THE ROOM.2209400100038 ERR-ANALYS (DATA-ERR) THE ERRORS WERE COMPOSED OF THE FOLLOWING 2209400100039 CONTRIBUTIONS 2209400100040 X 2209400100041 ERROR SOURCE ERROR, PERCENT 2209400100042 X 2209400100043 AL-27(N,A) MEASUREMENTS 2209400100044 AL-27(N,A) CROSS SECTION 1.7 - 4.0 2209400100045 BACKGROUND SUBTRACTION IN GAMMA-RAY 2209400100046 ANALYSIS 0.5 2209400100047 CONTRIBUTION OF SECONDARY NEUTRONS 0.2 - 3.0 2209400100048 STATISTICS 0.4 2209400100049 X 2209400100050 AL-27(N,P) MEASUREMENTS 2209400100051 RELATIVE EFFICIENCY OF GAMMA-RAY 2209400100052 COUNTING 0.7 2209400100053 GAMMA-RAY INTENSITY 0.5 2209400100054 DECAY FACTORS 0.2 2209400100055 CONTRIBUTION OF SECONDARY NEUTRONS 0.2 - 4.0 2209400100056 STATISTICS 0.4 2209400100057 X 2209400100058 FOIL IRRADIATION 2209400100059 TARGET TO FOIL DISTANCE 0.4 - 0.7 2209400100060 TIME VARIATION OF FLUX 0.2 2209400100061 X 2209400100062 STATUS .DATA WERE TAKEN FROM THE MAIN REF. 2209400100063 HISTORY (881128C) N.O. 2209400100064 (881216E) 2209400100065 (890530U) IF. PAGE OF REFERENCE ADDED 2209400100066 (890919E) 2209400100067 ENDBIB 65 0 2209400100068 NOCOMMON 0 0 2209400100069 ENDSUBENT 68 0 2209400199999 SUBENT 22094002 19881216 00002209400200001 BIB 5 7 2209400200002 REACTION (13-AL-27(N,P)12-MG-27,,SIG) 2209400200003 DECAY-DATA (12-MG-27,9.462MIN,DG,844.,.718) 2209400200004 MONITOR (1-H-1(N,EL)1-H-1,,SIG) SURFACE BARRIER SILICON 2209400200005 DETECTOR WITH A 1 MM THICK POLYETHYLENE RADIATOR. 2209400200006 STATUS .DATA WERE TAKEN FROM THE MAIN REF. 2209400200007 HISTORY (881128C) N.O. 2209400200008 (881216E) 2209400200009 ENDBIB 7 0 2209400200010 NOCOMMON 0 0 2209400200011 DATA 4 1 2209400200012 EN EN-RSL DATA DATA-ERR 2209400200013 MEV MEV MB MB 2209400200014 4.9920E+00 5.4000E-02 2.1600E+01 5.0000E-01 2209400200015 ENDDATA 3 0 2209400200016 ENDSUBENT 15 0 2209400299999 SUBENT 22094003 19881216 00002209400300001 BIB 5 6 2209400300002 REACTION (13-AL-27(N,P)12-MG-27,,SIG) 2209400300003 DECAY-DATA (12-MG-27,9.462MIN,DG,844.,.718) 2209400300004 MONITOR (13-AL-27(N,A)11-NA-24,,SIG) 2209400300005 STATUS .DATA WERE TAKEN FROM THE MAIN REF. 2209400300006 HISTORY (881128C) N.O. 2209400300007 (881216E) 2209400300008 ENDBIB 6 0 2209400300009 NOCOMMON 0 0 2209400300010 DATA 4 6 2209400300011 EN EN-RSL DATA DATA-ERR 2209400300012 MEV MEV MB MB 2209400300013 1.4600E+01 4.0000E-02 6.9800E+01 1.6000E+00 2209400300014 1.5210E+01 4.0000E-02 6.4900E+01 1.8000E+00 2209400300015 1.5880E+01 5.0000E-02 5.6500E+01 1.6000E+00 2209400300016 1.6980E+01 8.0000E-02 4.7000E+01 1.6000E+00 2209400300017 1.8040E+01 8.0000E-02 4.2700E+01 1.8000E+00 2209400300018 1.9870E+01 8.0000E-02 3.3800E+01 2.3000E+00 2209400300019 ENDDATA 8 0 2209400300020 ENDSUBENT 19 0 2209400399999 ENDENTRY 3 0 2209499999999