ENTRY 22095 19881216 00002209500000001 SUBENT 22095001 19881216 00002209500100001 BIB 13 46 2209500100002 REFERENCE (J,PR/C,38,(2),630,8808) 2209500100003 TITLE -ACTIVATION CROSS SECTION AND ISOMERIC CROSS-SECTION 2209500100004 RATIO FOR THE NB-93(N,A)Y-90M,G PROCESS. 2209500100005 AUTHOR (A.MANNAN,S.M.QAIM) 2209500100006 INSTITUTE (2GERJUL) 2209500100007 FACILITY (CYCLO) DEUTERONS WERE ACCELERATED TO 3.0 - 8.0 MEV 2209500100008 WITH A VARIABLE ENERGY COMPACT CYCLOTRON. 2209500100009 INC-SOURCE (D-D) NEUTRONS IN THE ENERGY RANGE 4.1 TO 10.6 MEV WERE2209500100010 PRODUCED WITH A DEUTERIUM GAS TARGET. THE MEAN NEUTRON2209500100011 FLUX DENSITIES RANGED BETWEEN 9.50E+06 AND 3.70E+07 2209500100012 N/CM2SEC. 2209500100013 METHOD (ACTIV) ACTIVATION TECHNIQUE IN COMBINATION WITH HIGH- 2209500100014 RESOLUTION GAMMA-RAY SPECTROSCOPY WAS USED TO MEASURE 2209500100015 THE ACTIVITY FROM THE Y-90M AND Y-92M PRODUCTS. 2209500100016 (CHSEP) THE Y-90G PRODUCT WAS RADIOCHEMICALLY SEPARATED2209500100017 AND THE BETA- ACTIVITY WAS COUNTED. THE CHEMICAL YIELD2209500100018 RANGED FROM 77 TO 94 PERCENT. 2209500100019 DETECTOR (GELI) A 35 CM3 GE(LI) DETECTOR WAS USED FOR THE GAMMA 2209500100020 MEASUREMENTS, WHILE BETA- RAY COUNTING WAS EMPLOYED 2209500100021 FOR THE BETA EMITTER Y-90G. THE LATTER MEASUREMENT WAS2209500100022 STARTED ABOUT 30 HOURS AFTER THE END OF THE 2209500100023 IRRADIATION, IN ORDER TO HAVE COMPLETE DECAY OF Y-90M.2209500100024 MONITOR (28-NI-58(N,P)27-CO-58,,SIG) 2209500100025 (26-FE-56(N,P)25-MN-56,,SIG) 2209500100026 THE CROSS SECTIONS FOR THESE REACTIONS WERE TAKEN FROM2209500100027 ENDF/B-V. 2209500100028 SAMPLE .THE SAMPLES CONSISTED OF ABOUT 5 G OF NIOBIUM POWDER 2209500100029 (CHEMICAL PURITY GREATER THAN 99.5 PERCENT) PACKED IN 2209500100030 A POLYETHYLENE TUBE, 1.1 CM DIAMETER AND 1.2 CM LONG. 2209500100031 NICKEL AND IRON FOILS WERE PLACED IN FRONT AND AT THE 2209500100032 BACK OF THE SAMPLE TO SERVE AS NEUTRON FLUX MONITORS. 2209500100033 THE SAMPLES WERE GENERALLY PLACED AT ABOUT 0.6 CM FROM2209500100034 THE BACK OF THE GAS TARGET BEAM STOP. IRRADIATIONS 2209500100035 WERE PERFORMED FOR 2.5 TO 3.0 HOURS. 2209500100036 CORRECTION .CORRECTIONS WERE APPLIED FOR BACKGROUND NEUTRONS FROM 2209500100037 THE TARGET CONSTRUCTION MATERIAL AND FROM THE D-D 2209500100038 BREAKUP REACTION. THE GAMMA COUNT RATES WERE CORRECTED2209500100039 FOR SELF-ABSORPTION, PILEUP, COINCIDENCE LOSS, 2209500100040 GEOMETRY, EFFICIENCY OF THE DETECTOR AND GAMMA-RAY 2209500100041 ABUNDANCE. CORRESPONDINGELY, THE BETA COUNT RATES WERE2209500100042 CORRECTED FOR CHEMICAL YIELD, ABSORPTION IN THE 2209500100043 COUNTER WINDOW, FINITE-SIZE GEOMETRY AND EFFICIENCY OF2209500100044 THE DETECTOR. 2209500100045 STATUS .DATA TAKEN FROM MAIN REF. 2209500100046 HISTORY (881102C) N.O. 2209500100047 (881216E) 2209500100048 ENDBIB 46 0 2209500100049 NOCOMMON 0 0 2209500100050 ENDSUBENT 49 0 2209500199999 SUBENT 22095002 19881216 00002209500200001 BIB 5 7 2209500200002 REACTION (41-NB-93(N,A)39-Y-90-M,,SIG) 2209500200003 DECAY-DATA (39-Y-90-M,3.19HR,DG,480.,.914) 2209500200004 ERR-ANALYS (DATA-ERR) TOTAL ERRORS, BEING THE COMBINATION OF 2209500200005 STATISTICAL AND SYSTEMATIC ERRORS. 2209500200006 STATUS .DATA TAKEN FROM MAIN REF. 2209500200007 HISTORY (881102C) N.O. 2209500200008 (881216E) 2209500200009 ENDBIB 7 0 2209500200010 NOCOMMON 0 0 2209500200011 DATA 4 13 2209500200012 EN EN-RSL DATA DATA-ERR 2209500200013 MEV MEV MB MB 2209500200014 4.1500E+00 1.5000E-01 4.0000E-02 4.0000E-03 2209500200015 4.9800E+00 1.6000E-01 1.1000E-01 1.2000E-02 2209500200016 5.5100E+00 1.6000E-01 1.7000E-01 1.5000E-02 2209500200017 6.0900E+00 1.6000E-01 3.5000E-01 3.0000E-02 2209500200018 6.6200E+00 1.7000E-01 4.9000E-01 5.0000E-02 2209500200019 7.1500E+00 1.7000E-01 6.5000E-01 5.0000E-02 2209500200020 7.6500E+00 1.8000E-01 7.9000E-01 6.0000E-02 2209500200021 8.1600E+00 1.9000E-01 1.0100E+00 8.0000E-02 2209500200022 8.6500E+00 2.0000E-01 1.0600E+00 8.0000E-02 2209500200023 9.0900E+00 2.2000E-01 1.4100E+00 1.1000E-01 2209500200024 9.6700E+00 2.3000E-01 1.8700E+00 1.6000E-01 2209500200025 1.0210E+01 2.3000E-01 1.9600E+00 1.9000E-01 2209500200026 1.0610E+01 2.4000E-01 2.6300E+00 3.1000E-01 2209500200027 ENDDATA 15 0 2209500200028 ENDSUBENT 27 0 2209500299999 SUBENT 22095003 19881216 00002209500300001 BIB 5 8 2209500300002 REACTION (41-NB-93(N,A)39-Y-90,,SIG) 2209500300003 DECAY-DATA (39-Y-90-M,3.19HR,DG,480.,.914) 2209500300004 (39-Y-90-G,64.1HR,B-,2300.,.99) 2209500300005 ERR-ANALYS (DATA-ERR) TOTAL ERRORS, BEING THE COMBINATION OF 2209500300006 STATISTICAL AND SYSTEMATIC ERRORS. 2209500300007 STATUS .DATA TAKEN FROM MAIN REF. 2209500300008 HISTORY (881102C) N.O. 2209500300009 (881216E) 2209500300010 ENDBIB 8 0 2209500300011 NOCOMMON 0 0 2209500300012 DATA 4 13 2209500300013 EN EN-RSL DATA DATA-ERR 2209500300014 MEV MEV MB MB 2209500300015 4.1500E+00 1.5000E-01 1.0000E-01 1.0000E-02 2209500300016 4.9800E+00 1.6000E-01 3.4000E-01 3.0000E-02 2209500300017 5.5100E+00 1.6000E-01 3.7000E-01 3.0000E-02 2209500300018 6.0900E+00 1.6000E-01 6.4000E-01 6.0000E-02 2209500300019 6.6200E+00 1.7000E-01 8.7000E-01 7.0000E-02 2209500300020 7.1500E+00 1.7000E-01 1.2900E+00 1.1000E-01 2209500300021 7.6500E+00 1.8000E-01 1.3300E+00 1.1000E-01 2209500300022 8.1600E+00 1.9000E-01 1.6800E+00 1.3000E-01 2209500300023 8.6500E+00 2.0000E-01 1.7000E+00 1.3000E-01 2209500300024 9.0900E+00 2.2000E-01 1.9000E+00 1.5000E-01 2209500300025 9.6700E+00 2.3000E-01 2.8800E+00 2.5000E-01 2209500300026 1.0210E+01 2.3000E-01 2.8300E+00 2.8000E-01 2209500300027 1.0610E+01 2.4000E-01 3.8900E+00 4.5000E-01 2209500300028 ENDDATA 15 0 2209500300029 ENDSUBENT 28 0 2209500399999 SUBENT 22095004 19881216 00002209500400001 BIB 5 7 2209500400002 REACTION (41-NB-93(N,2N)41-NB-92-M,,SIG) 2209500400003 DECAY-DATA (41-NB-92-M,10.15D,DG,934.,.992) 2209500400004 ERR-ANALYS (DATA-ERR) TOTAL ERRORS, BEING THE COMBINATION OF 2209500400005 STATISTICAL AND SYSTEMATIC ERRORS. 2209500400006 STATUS .DATA TAKEN FROM MAIN REF. 2209500400007 HISTORY (881102C) N.O. 2209500400008 (881216E) 2209500400009 ENDBIB 7 0 2209500400010 NOCOMMON 0 0 2209500400011 DATA 4 4 2209500400012 EN EN-RSL DATA DATA-ERR 2209500400013 MEV MEV MB MB 2209500400014 9.0900E+00 2.2000E-01 1.2000E+00 1.0000E-01 2209500400015 9.6700E+00 2.3000E-01 1.7000E+01 1.5000E+00 2209500400016 1.0210E+01 2.3000E-01 8.6500E+01 8.7000E+00 2209500400017 1.0610E+01 2.4000E-01 1.6300E+02 1.9000E+01 2209500400018 ENDDATA 6 0 2209500400019 ENDSUBENT 18 0 2209500499999 SUBENT 22095005 19881216 00002209500500001 BIB 5 6 2209500500002 REACTION (41-NB-93(N,N+A)39-Y-89-M,,SIG) 2209500500003 DECAY-DATA (39-Y-89-M,16.SEC) 2209500500004 ERR-ANALYS .NO ERRORS GIVEN. 2209500500005 STATUS .DATA TAKEN FROM MAIN REF. 2209500500006 HISTORY (881102C) N.O. 2209500500007 (881216E) 2209500500008 ENDBIB 6 0 2209500500009 NOCOMMON 0 0 2209500500010 DATA 3 2 2209500500011 EN EN-RSL DATA-MAX 2209500500012 MEV MEV MB 2209500500013 1.0210E+01 2.3000E-01 1.0000E-01 2209500500014 1.0610E+01 2.4000E-01 1.0000E-01 2209500500015 ENDDATA 4 0 2209500500016 ENDSUBENT 15 0 2209500599999 ENDENTRY 5 0 2209599999999