ENTRY 20214 19831121 00002021400000001 SUBENT 20214001 19831121 00002021400100001 BIB 15 50 2021400100002 INSTITUTE (2NEDUTR) 2021400100003 REFERENCE (J,NP/A,102,209,6709) 2021400100004 AUTHOR (P.SPILLING, H.GRUPPELAAR, A.M.F.OP DEN KAMP) 2021400100005 TITLE - THERMAL-NEUTRON CAPTURE GAMMA RAYS FROM NATURAL 2021400100006 MAGNESIUM AND ENRICHED MG-25 - 2021400100007 FACILITY .HIGH FLUX REACTOR IN PETTEN 2021400100008 INC-SOURCE (REAC ) TARGET PLACED IN A HORIZONTAL RADIAL BEAM 2021400100009 OF THE REACTOR. 2021400100010 .THE NEUTRON FILTER, CONSISTING OF QUARTZ 2021400100011 AND BISMUTH SINGLE CRYSTALS, WAS COOLED TO 2021400100012 77 KELVIN BY LIQUID NITROGEN. 2021400100013 NEUTRON FLUX = 1.E+7/CM**2/SEC. 2021400100014 SAMPLE .COMPOSITION 6 GRAMM NATURAL MAGNESIUM METAL AND 2021400100015 2.4 GRAMM MG-O (85 PERCENT ENRICHED IN MG-25). 2021400100016 DETECTOR (GELI ) 1.6 CM**3 AND 5 CM**3 GE(LI)-DETECTORS FOR 2021400100017 GAMMA-RAYS FROM ENRICHED AND NATURAL SAMPLE 2021400100018 USED RESPECTIVELY. 2021400100019 MONITOR .THE INTENSITIES IN THE THREE MG-ISOTOPES 2021400100020 ARE NORMALIZED SUCH THAT THE SUM OF THE 2021400100021 INTENSITIES OF PRIMARY GAMMA-RAYS IS 100. 2021400100022 THE SAME HAS BEEN DONE FOR THE DECAY OF 2021400100023 THE VARIOUS LEVELS. 2021400100024 .THE EFFICIENCY CURVES FOR FULL-ENERGY, 2021400100025 SINGLE-ESCAPE AND PAIR PEAKS WERE OBTAINED 2021400100026 WITH SOURCES OF KNOWN INTENSITIES AND WITH 2021400100027 GAMMA-RAYS FROM CL-35(N,GAMMA) AND 2021400100028 S-32(N,GAMMA) REACTIONS, DETAILS IN 2021400100029 NUCL.PHYS.,A102(1967)209. 2021400100030 .ENERGIES OF GAMMA-RAYS USED FOR CALIBRATION 2021400100031 GIVEN IN TABLE 4 OF NUCL.PHYS.,A102(1967)209 2021400100032 ASSUMING MG(N,GAMMA) = 64 +- 3 MILLIBARN 2021400100033 AND USING THE GAMMA INTENSITIES MEASURED 2021400100034 THE (N,GAMMA)-CROSS-SECTIONS FOR MG-25, 2021400100035 MG-26, AND MG-27 WAS DERIVED. 2021400100036 PART-DET (G ) GAMMAS 2021400100037 COMMENT .LEVEL SCHEMES CONSTRUCTED, DETAILS IN PUBLICATION. 2021400100038 .Q-VALUES FOR (N,GAMMA)-REACTIONS FOR THE TARGET 2021400100039 ISOTOPES MG-24, MG-25, MG-26 DETERMINED AS 2021400100040 Q = 7332.8 +- 0.4 KEV, Q = 11096.0 +- 0.5 KEV, 2021400100041 Q = 6446.3 +- 0.9 KEV RESPECTIVELY. 2021400100042 STATUS .DATA FROM NUCL.PHYS.,A102(1967)209. 2021400100043 HISTORY (721003C) 2021400100044 (740521E) 2021400100045 CORRECTION .GAMMA-RAYS CORRECTED FOR RECOIL LOSSES. 2021400100046 ERR-ANALYS .ERRORS IN THE ENERGIES ARE MAINLY DUE TO ERRORS 2021400100047 MADE IN READING-OFF PEAK POSITIONS. THE ERRORS IN THE 2021400100048 INTENSITIES ARE PARTLY DUE TO STATISTICS, PARTLY DUE 2021400100049 TO UNCERTAINTIES IN THE EFFICIENCY CURVES FOR THE 2021400100050 DETECTOR. THE EFFICIENCY CURVES ARE BELIEVED TO BE 2021400100051 TRUE TO WITHIN 15 PERCENT. 2021400100052 ENDBIB 50 0 2021400100053 COMMON 1 3 2021400100054 EN-DUMMY 2021400100055 MEV 2021400100056 2.5300E-08 2021400100057 ENDCOMMON 3 0 2021400100058 ENDSUBENT 57 0 2021400199999 SUBENT 20214002 19831121 00002021400200001 BIB 3 4 2021400200002 REACTION (12-MG-0(N,G),,SPC,,SPA) 2021400200003 FLAG (1.) MG-24(N,GAMMA) AND MG-25(N,GAMMA). 2021400200004 HISTORY (721003C) 2021400200005 (740521E) 2021400200006 ENDBIB 4 0 2021400200007 NOCOMMON 0 0 2021400200008 DATA 5 11 2021400200009 E E-ERR DATA DATA-ERR FLAG 2021400200010 MEV MEV GAM/100N GAM/100N NO-DIM 2021400200011 1.8200E-01 3.0000E-04 2.0000E+01 5.0000E+00 2021400200012 5.1100E-01 3.0000E-04 2.1000E+03 3.0000E+02 2021400200013 2.3908E+00 1.0000E-03 5.0000E+01 1.0000E+01 2021400200014 2.4160E+00 2.0000E-03 2.0000E+01 1.0000E+01 2021400200015 4.5315E+00 1.0000E-03 1.5000E+01 3.0000E+00 2021400200016 5.2250E+00 1.5000E-03 6.0000E+00 8.0000E+00 2021400200017 5.5265E+00 2.0000E-03 1.0000E+01 4.0000E+00 2021400200018 5.6222E+00 1.5000E-03 4.0000E+00 2.0000E+00 2021400200019 6.4702E+00 1.5000E-03 8.0000E+00 2.0000E+00 2021400200020 6.7467E+00 1.0000E-03 4.0000E+01 5.0000E+00 1.0000E+00 2021400200021 6.8677E+00 2.0000E-03 2.0000E+00 1.0000E+00 2021400200022 ENDDATA 13 0 2021400200023 ENDSUBENT 22 0 2021400299999 SUBENT 20214003 19831121 00002021400300001 BIB 3 4 2021400300002 REACTION (12-MG-24(N,G)12-MG-25,,SIG,,SPA) 2021400300003 ANALYSIS .FROM THE SUM OF THE PRIMARY GAMMA-RAYS. 2021400300004 HISTORY (721003C) 2021400300005 (740521E) 2021400300006 ENDBIB 4 0 2021400300007 NOCOMMON 0 0 2021400300008 DATA 2 1 2021400300009 DATA DATA-ERR 2021400300010 B B 2021400300011 5.2000E-02 1.3000E-02 2021400300012 ENDDATA 3 0 2021400300013 ENDSUBENT 12 0 2021400399999 SUBENT 20214004 19831121 00002021400400001 BIB 2 3 2021400400002 REACTION (12-MG-24(N,G)12-MG-25,,SPC,,SPA) 2021400400003 HISTORY (721003C) 2021400400004 (740521E) 2021400400005 ENDBIB 3 0 2021400400006 NOCOMMON 0 0 2021400400007 DATA 4 15 2021400400008 E E-ERR DATA DATA-ERR 2021400400009 MEV MEV GAM/100N GAM/100N 2021400400010 3.8970E-01 3.0000E-04 4.2000E+02 6.0000E+01 2021400400011 5.8520E-01 3.0000E-03 2.0000E+03 3.0000E+02 2021400400012 9.7470E-01 3.0000E-04 4.1000E+02 6.0000E+01 2021400400013 1.6137E+00 1.5000E-03 1.1500E+02 2.0000E+01 2021400400014 1.7137E+00 1.0000E-03 8.0000E+01 1.0000E+01 2021400400015 1.9776E+00 2.0000E-03 7.0000E+01 1.0000E+01 2021400400016 2.4387E+00 1.0000E-03 2.7500E+02 4.0000E+01 2021400400017 2.5611E+00 1.5000E-03 1.5000E+01 1.0000E+01 2021400400018 2.8288E+00 3.0000E-04 1.4500E+03 2.2000E+02 2021400400019 3.0545E+00 5.0000E-04 4.6500E+02 7.0000E+01 2021400400020 3.3020E+00 5.0000E-04 3.6000E+02 3.5000E+01 2021400400021 3.4146E+00 1.0000E-03 1.2500E+02 3.0000E+01 2021400400022 3.6929E+00 1.5000E-03 5.5000E+01 1.0000E+01 2021400400023 3.9186E+00 7.0000E-04 1.9000E+03 3.0000E+02 2021400400024 6.3587E+00 1.0000E-03 5.0000E+01 8.0000E+00 2021400400025 ENDDATA 17 0 2021400400026 ENDSUBENT 25 0 2021400499999 SUBENT 20214005 19831121 00002021400500001 BIB 3 4 2021400500002 REACTION (12-MG-25(N,G)12-MG-26,,SIG,,SPA) 2021400500003 ANALYSIS .FROM THE SUM OF THE GROUND-STATE GAMMA-RAYS. 2021400500004 HISTORY (721003C) 2021400500005 (740521E) 2021400500006 ENDBIB 4 0 2021400500007 NOCOMMON 0 0 2021400500008 DATA 2 1 2021400500009 DATA DATA-ERR 2021400500010 B B 2021400500011 1.8100E-01 5.0000E-02 2021400500012 ENDDATA 3 0 2021400500013 ENDSUBENT 12 0 2021400599999 SUBENT 20214006 19831121 00002021400600001 BIB 2 3 2021400600002 REACTION (12-MG-25(N,G)12-MG-26,,SPC,,SPA) 2021400600003 HISTORY (721003C) 2021400600004 (740521E) 2021400600005 ENDBIB 3 0 2021400600006 NOCOMMON 0 0 2021400600007 DATA 4 67 2021400600008 E E-ERR DATA DATA-ERR 2021400600009 MEV MEV GAM/100N GAM/100N 2021400600010 7.0400E-01 3.0000E-03 1.0000E+01 5.0000E+00 2021400600011 7.6240E-01 3.0000E-03 1.0000E+01 5.0000E+00 2021400600012 1.0029E+00 5.0000E-04 1.1000E+02 1.5000E+01 2021400600013 1.0976E+00 1.0000E-03 1.5000E+01 5.0000E+00 2021400600014 1.1120E+00 3.0000E-03 1.5000E+01 5.0000E+00 2021400600015 1.1295E+00 3.0000E-04 5.2500E+02 8.0000E+01 2021400600016 1.1726E+00 2.0000E-03 1.0000E+01 5.0000E+00 2021400600017 1.2961E+00 1.0000E-03 3.5000E+01 5.0000E+00 2021400600018 1.3941E+00 2.0000E-03 2.0000E+01 1.0000E+01 2021400600019 1.4057E+00 2.0000E-03 2.5000E+01 1.0000E+01 2021400600020 1.4115E+00 2.0000E-03 7.5000E+01 1.0000E+01 2021400600021 1.7758E+00 2.0000E-03 1.2000E+02 3.0000E+01 2021400600022 1.8088E+00 5.0000E-04 1.0600E+03 1.6000E+02 2021400600023 2.1313E+00 2.0000E-03 7.0000E+01 1.5000E+01 2021400600024 2.1875E+00 2.0000E-03 4.0000E+01 2.0000E+01 2021400600025 2.3525E+00 1.5000E-03 3.5000E+01 1.0000E+01 2021400600026 2.5099E+00 1.0000E-03 4.0000E+01 1.0000E+01 2021400600027 2.5214E+00 1.5000E-03 8.0000E+01 1.0000E+01 2021400600028 2.5418E+00 1.0000E-03 6.0000E+01 1.0000E+01 2021400600029 2.9083E+00 1.5000E-03 2.5000E+01 5.0000E+00 2021400600030 2.9185E+00 1.5000E-03 3.0000E+01 1.0000E+01 2021400600031 2.9377E+00 1.5000E-03 5.0000E+01 1.0000E+01 2021400600032 3.0055E+00 1.5000E-03 3.0000E+01 1.0000E+01 2021400600033 3.0920E+00 2.0000E-03 1.5000E+01 5.0000E+00 2021400600034 3.1910E+00 2.0000E-03 1.0000E+01 5.0000E+00 2021400600035 3.2100E+00 2.0000E-03 2.5000E+01 5.0000E+00 2021400600036 3.3210E+00 1.0000E-03 4.0000E+01 1.5000E+01 2021400600037 3.3400E+00 1.5000E-03 2.5000E+01 5.0000E+00 2021400600038 3.4030E+00 2.0000E-03 1.0000E+01 5.0000E+00 2021400600039 3.4860E+00 2.0000E-03 5.0000E+00 4.0000E+00 2021400600040 3.5514E+00 1.5000E-03 6.0000E+01 1.0000E+01 2021400600041 3.6815E+00 3.0000E-03 1.0000E+01 5.0000E+00 2021400600042 3.7458E+00 1.5000E-03 6.5000E+01 1.0000E+01 2021400600043 3.8123E+00 7.0000E-04 5.0000E+01 1.0000E+01 2021400600044 3.8331E+00 7.0000E-04 2.4000E+02 3.5000E+01 2021400600045 3.9932E+00 3.0000E-03 1.0000E+01 5.0000E+00 2021400600046 4.1284E+00 7.0000E-04 7.0000E+01 1.0000E+01 2021400600047 4.3050E+00 2.0000E-03 4.0000E+00 2.0000E+00 2021400600048 4.3130E+00 3.0000E-03 7.0000E+00 2.0000E+00 2021400600049 4.3240E+00 2.0000E-03 2.0000E+01 5.0000E+00 2021400600050 4.3360E+00 2.0000E-03 1.0000E+01 3.0000E+00 2021400600051 4.4125E+00 1.5000E-03 4.5000E+01 7.0000E+00 2021400600052 4.4629E+00 2.0000E-03 6.0000E+00 2.0000E+00 2021400600053 4.5132E+00 2.0000E-03 1.5000E+01 3.0000E+00 2021400600054 4.5570E+00 1.5000E-03 2.0000E+01 3.0000E+00 2021400600055 4.6062E+00 1.0000E-03 2.0000E+01 3.0000E+00 2021400600056 4.8891E+00 2.0000E-03 4.0000E+00 2.0000E+00 2021400600057 4.9370E+00 1.0000E-03 2.5000E+01 5.0000E+00 2021400600058 4.9480E+00 2.0000E-03 2.0000E+01 5.0000E+00 2021400600059 4.9691E+00 1.0000E-03 9.0000E+01 1.5000E+01 2021400600060 5.0368E+00 1.5000E-03 7.0000E+00 2.0000E+00 2021400600061 5.0702E+00 1.5000E-03 5.0000E+01 1.0000E+01 2021400600062 5.2406E+00 2.0000E-03 6.0000E+00 2.0000E+00 2021400600063 5.2566E+00 3.0000E-03 1.5000E+01 3.0000E+00 2021400600064 5.4550E+00 1.0000E-03 1.1500E+02 1.5000E+01 2021400600065 5.4735E+00 1.5000E-03 5.0000E+00 2.0000E+00 2021400600066 5.5408E+00 1.5000E-03 2.0000E+01 5.0000E+00 2021400600067 5.5582E+00 2.0000E-03 6.0000E+00 2.0000E+00 2021400600068 5.7336E+00 1.5000E-03 4.0000E+00 2.0000E+00 2021400600069 5.8045E+00 1.5000E-03 1.5000E+01 3.0000E+00 2021400600070 6.3790E+00 1.5000E-03 1.2000E+01 3.0000E+00 2021400600071 6.7637E+00 1.5000E-03 1.2000E+01 2.0000E+00 2021400600072 6.7818E+00 3.0000E-03 3.0000E+00 1.0000E+00 2021400600073 7.1543E+00 1.5000E-03 5.0000E+00 2.0000E+00 2021400600074 7.2557E+00 2.0000E-03 5.0000E+00 2.0000E+00 2021400600075 8.1590E+00 1.0000E-03 1.8000E+02 2.5000E+01 2021400600076 9.2869E+00 1.0000E-03 4.0000E+01 5.0000E+00 2021400600077 ENDDATA 69 0 2021400600078 ENDSUBENT 77 0 2021400699999 SUBENT 20214007 19831121 00002021400700001 BIB 3 4 2021400700002 REACTION (12-MG-26(N,G)12-MG-27,,SIG,,SPA) 2021400700003 ANALYSIS .FROM THE SUM OF THE GROUND-STATE GAMMA-RAYS. 2021400700004 HISTORY (721003C) 2021400700005 (740521E) 2021400700006 ENDBIB 4 0 2021400700007 NOCOMMON 0 0 2021400700008 DATA 2 1 2021400700009 DATA DATA-ERR 2021400700010 B B 2021400700011 3.4000E-02 1.0000E-02 2021400700012 ENDDATA 3 0 2021400700013 ENDSUBENT 12 0 2021400799999 SUBENT 20214008 19831121 00002021400800001 BIB 3 6 2021400800002 REACTION (12-MG-26(N,G)12-MG-27,,SPC,,SPA) 2021400800003 FLAG (1.) MG-26(N,GAMMA)MG-27(BETA-)AL-27. 2021400800004 (2.) MG-26(N,GAMMA)MG-27, ISOTOPE ASSIGNMENT IS 2021400800005 TENTATIVE. 2021400800006 HISTORY (721003C) 2021400800007 (740521E) 2021400800008 ENDBIB 6 0 2021400800009 NOCOMMON 0 0 2021400800010 DATA 5 8 2021400800011 E E-ERR DATA DATA-ERR FLAG 2021400800012 MEV MEV GAM/100N GAM/100N NO-DIM 2021400800013 8.4410E-01 3.0000E-04 1.4000E+02 2.0000E+01 1.0000E+00 2021400800014 9.8410E-01 5.0000E-04 6.0000E+01 1.0000E+01 2021400800015 1.0143E+00 5.0000E-04 7.0000E+01 1.0000E+01 1.0000E+00 2021400800016 1.9425E+00 2.0000E-03 2.0000E+01 1.0000E+01 2.0000E+00 2021400800017 2.8824E+00 3.0000E-04 1.3000E+02 2.0000E+01 2021400800018 3.1160E+00 2.0000E-03 6.5000E+01 3.0000E+01 2.0000E+00 2021400800019 3.5638E+00 1.5000E-03 1.7000E+02 3.5000E+01 2021400800020 6.4463E+00 1.5000E-03 2.0000E+01 4.0000E+00 2021400800021 ENDDATA 10 0 2021400800022 ENDSUBENT 21 0 2021400899999 ENDENTRY 8 0 2021499999999