ENTRY 20813 19840208 00002081300000001 SUBENT 20813001 19840208 00002081300100001 BIB 15 41 2081300100002 INSTITUTE (2GERMUN) 2081300100003 REFERENCE (J,ZP/A,287,61,7806) 2081300100004 (C,78HARWELL,724,7809) 2081300100005 (P,NEANDC(E)-192,(5),78,7804) COHERENT SCATTERING LNTH 2081300100006 AUTHOR (L.KOESTER,K.KNOPF,W.WASCHKOWSKI) 2081300100007 TITLE -INTERACTIONS OF SLOW NEUTRONS WITH CHROMIUM ISOTOPES-.2081300100008 FACILITY (REAC ) FRM REACTOR,4MW THERMAL POWER 2081300100009 INC-SOURCE (REAC ) NEUTRON GUIDE TUBE 2081300100010 SAMPLE .POWDER MIXED WITH LIQUIDS FOR CHRISTIANSEN FILTER. 2081300100011 CRYSTALLINE CHROMIUM FOR TOTAL AND ABSORPTION 2081300100012 MEASUREMENTS. 5 SAMPLES 99.99 TO 99.999 PURE. 2081300100013 METHOD .CHRISTIANSEN FILTER. COMPARISON OF THE SCATTERING 2081300100014 DENSITY OF A POWDERED SAMPLE WITH THAT OF A RANGE 2081300100015 OF LIQUID MIXTURES OF VARIED BUT WELL KNOWN 2081300100016 SCATTERING DENSITY. FOR COHERENT SCATTERING LENGTHS. 2081300100017 .FOR ABSORPTION CROSS SECTION MEASUREMENTS THE 2081300100018 NEUTRON TRANSMISSION WAS MEASURED AS A FUNCTION 2081300100019 OF THE DISTANCE BETWEEN SAMPLE AND DETECTOR,AND 2081300100020 THE TOTAL AND ABSORPTION CROSS SECTIONS DEDUCED 2081300100021 FROM THE FORM OF THE MEASURED DEPENDENCE. 2081300100022 .TOTAL SCATTERING CROSS SECTIONS AT 1.26EV AND 2081300100023 5.19EV WERE MEASURED WITH CONTINUOUSLY OPERATING 2081300100024 RESONANCE DETECTORS OF RHODIUM AND SILVER. FOR 2081300100025 DETAILS SEE Z.ANGEW PHYSIK 31,21,1971. 2081300100026 DETECTOR (SCIN ) FOR SCATTERED NEUTRONS FROM CHRYSTIANSEN 2081300100027 FILTER. 2081300100028 .RESONANCE ACTIVATION DETECTORS FOR TOTAL SIG. 2081300100029 PART-DET (N ) 2081300100030 COMMENT .MEASUREMENTS ARE ALL MADE RELATIVE TO 2081300100031 VARIOUS LIQUIDS IN CHRISTIANSEN FILTER. FOR 2081300100032 DETAILS SEE TABLE 1. 2081300100033 STATUS .FROM PUBLISHED TABLES IN ZP/A 287 61 1978. 2081300100034 HISTORY (781024C) PDJ. 2081300100035 (790219E) 2081300100036 (801208A) REACTION STRINGS IN SUBWORKS 005,010,013 2081300100037 017 AND 020 CORRECTED. 2081300100038 (801218E) 2081300100039 CORRECTION .IN SCATTERING OF NEUTRONS. IMPURITIES. 2081300100040 ERR-ANALYS .UNCERTAINTY DUE TO INHOMOGENEITY AND TRACE IMPURITIES 2081300100041 ARE INCLUDED. ALL ERRORS ARE QUOTED AS ONE STANDARD 2081300100042 DEVIATION 2081300100043 ENDBIB 41 0 2081300100044 NOCOMMON 0 0 2081300100045 ENDSUBENT 44 0 2081300199999 SUBENT 20813002 19840208 00002081300200001 BIB 4 7 2081300200002 REACTION (24-CR-0(N,THS)24-CR-0,INC,SIG) ISOTOPICALLY 2081300200003 INCOHERENT SCATTERING CROSS SECTION. BOUND ATOM. 2081300200004 SAMPLE .POWDERED CR AND CR2O3. 2081300200005 STATUS (DEP ) DERIVED FROM THE MEASURED ISOTOPIC 2081300200006 SCATTERING LENGTHS. 2081300200007 HISTORY (781024C) PDJ. 2081300200008 (790219E) 2081300200009 ENDBIB 7 0 2081300200010 NOCOMMON 0 0 2081300200011 DATA 3 1 2081300200012 EN-DUMMY DATA DATA-ERR 2081300200013 EV B B 2081300200014 2.5300E-02 1.2700E+00 1.3000E-02 2081300200015 ENDDATA 3 0 2081300200016 ENDSUBENT 15 0 2081300299999 SUBENT 20813003 19840208 00002081300300001 BIB 3 8 2081300300002 REACTION (24-CR-0(N,SCT)24-CR-0,INC,SIG) FREE ATOM,NUCLEAR 2081300300003 INCOHERENT SCATTERING CROSS SECTION. 2081300300004 STATUS (DEP ) DERIVED FROM THE DIFFERENCE BETWEEN THE 2081300300005 TOTAL FREE CROSS SECTION AND 4*PI*A(N)**2, THE 2081300300006 CROSS SECTION EQUIVALENT OF THE COHERENT SCATTERING 2081300300007 AMPLITUDE. 2081300300008 HISTORY (781024C) PDJ. 2081300300009 (790219E) 2081300300010 ENDBIB 8 0 2081300300011 NOCOMMON 0 0 2081300300012 DATA 3 1 2081300300013 EN-DUMMY DATA DATA-ERR 2081300300014 EV B B 2081300300015 2.5300E-02 1.7530E+00 1.3000E-02 2081300300016 ENDDATA 3 0 2081300300017 ENDSUBENT 16 0 2081300399999 SUBENT 20813004 19840208 00002081300400001 BIB 4 6 2081300400002 REACTION (24-CR-0(N,SCT)24-CR-0,FA,SIG) FREE SCAT SIG. 2081300400003 SAMPLE .POWDERED CRYSTALLINE CHROMIUM AND CR2O3. 2081300400004 STATUS (DEP ) DERIVED FROM TOTAL CROSS SECTION LESS 2081300400005 ABSORPTION CROSS SECTION. 2081300400006 HISTORY (781024C) PDJ. 2081300400007 (790219E) 2081300400008 ENDBIB 6 0 2081300400009 NOCOMMON 0 0 2081300400010 DATA 3 2 2081300400011 EN DATA DATA-ERR 2081300400012 EV B B 2081300400013 1.2570E+00 3.3860E+00 2.0000E-02 2081300400014 5.1900E+00 3.3760E+00 2.0000E-02 2081300400015 ENDDATA 4 0 2081300400016 ENDSUBENT 15 0 2081300499999 SUBENT 20813005 19840208 00002081300500001 BIB 6 11 2081300500002 REACTION (24-CR-0(N,THS)24-CR-0,BA/COH,AMP) BOUND ATOM 2081300500003 COHERENT SCATTERING LENGTH. 2081300500004 SAMPLE .NATURAL CR POWDER AND CR2O3 POWDER. 2081300500005 COMMENT .AVERAGE OF FIVE INDEPENDENT MEASUREMENTS IS GIVEN. 2081300500006 STATUS .VALUE IN TEXT. 2081300500007 HISTORY (781024C) PDJ. 2081300500008 (790219E) 2081300500009 (801208A) 2081300500010 (801218E) 2081300500011 CORRECTION .MEAN CORRECTION FOR H2 AND O2 CONTAMINATION 2081300500012 IS -0.023 FERMI. 2081300500013 ENDBIB 11 0 2081300500014 NOCOMMON 0 0 2081300500015 DATA 3 1 2081300500016 EN-DUMMY DATA DATA-ERR 2081300500017 EV FERMI FERMI 2081300500018 2.5300E-02 3.6350E+00 7.0000E-03 2081300500019 ENDDATA 3 0 2081300500020 ENDSUBENT 19 0 2081300599999 SUBENT 20813006 19840208 00002081300600001 BIB 4 5 2081300600002 REACTION (24-CR-0(N,ABS),,SIG) ABSORPTION CROSS SECT. 2081300600003 SAMPLE .POWDERED CRYSTALLINE CHROMIUM AND CR2O3. 2081300600004 STATUS .TABLE 6. 2081300600005 HISTORY (781024C) PDJ. 2081300600006 (790219E) 2081300600007 ENDBIB 5 0 2081300600008 NOCOMMON 0 0 2081300600009 DATA 4 1 2081300600010 EN EN-ERR DATA DATA-ERR 2081300600011 MICRO-EV MICRO-EV B B 2081300600012 5.1000E+02 1.0000E+01 2.1500E+01 4.0000E-01 2081300600013 ENDDATA 3 0 2081300600014 ENDSUBENT 13 0 2081300699999 SUBENT 20813007 19840208 00002081300700001 BIB 4 5 2081300700002 REACTION (24-CR-0(N,ABS),,SIG) ABSORPTION SIGMA 2081300700003 SAMPLE .POWDERED CRYSTALLINE CHROMIUM AND CR2O3. 2081300700004 STATUS (DEP ) DERIVED FROM MEASUREMENT AT 510 MICRO-EV. 2081300700005 HISTORY (781024C) PDJ. 2081300700006 (790219E) 2081300700007 ENDBIB 5 0 2081300700008 NOCOMMON 0 0 2081300700009 DATA 3 1 2081300700010 EN DATA DATA-ERR 2081300700011 EV B B 2081300700012 2.5300E-02 3.0500E+00 8.0000E-02 2081300700013 ENDDATA 3 0 2081300700014 ENDSUBENT 13 0 2081300799999 SUBENT 20813008 19840208 00002081300800001 BIB 4 5 2081300800002 REACTION (24-CR-0(N,TOT),,SIG) TOTAL CROSS SECTION. 2081300800003 SAMPLE .POWDERED CRYSTALLINE CHROMIUM AND CR2O3. 2081300800004 STATUS .TABLE 6. 2081300800005 HISTORY (781024C) PDJ. 2081300800006 (790219E) 2081300800007 ENDBIB 5 0 2081300800008 NOCOMMON 0 0 2081300800009 DATA 3 2 2081300800010 EN DATA DATA-ERR 2081300800011 EV B B 2081300800012 1.2570E+00 3.8170E+00 1.0000E-02 2081300800013 5.1900E+00 3.5900E+00 1.0000E-02 2081300800014 ENDDATA 4 0 2081300800015 ENDSUBENT 14 0 2081300899999 SUBENT 20813009 19840208 00002081300900001 BIB 4 7 2081300900002 REACTION (24-CR-50(N,SCT)24-CR-50,FA,SIG) FREE SCATTERING 2081300900003 CROSS SECTION 2081300900004 SAMPLE .ISOTOPIC COMPOSITION 96.8 PERCENT. 2081300900005 STATUS (DEP ) DERIVED FROM MEASURED COHERENT SCATTERING 2081300900006 AMPLITUDE. TABLE 7. 2081300900007 HISTORY (781024C) PDJ. 2081300900008 (790219E) 2081300900009 ENDBIB 7 0 2081300900010 NOCOMMON 0 0 2081300900011 DATA 3 1 2081300900012 EN-DUMMY DATA DATA-ERR 2081300900013 EV B B 2081300900014 2.5300E-02 2.4100E+00 6.0000E-02 2081300900015 ENDDATA 3 0 2081300900016 ENDSUBENT 15 0 2081300999999 SUBENT 20813010 19840208 00002081301000001 BIB 4 8 2081301000002 REACTION (24-CR-50(N,THS)24-CR-50,BA/COH,AMP) BOUND ATOM 2081301000003 COHERENT SCATTERING LENGTH. 2081301000004 SAMPLE .ISOTOPIC COMPOSITION CR-50 96.8 PERCENT 2081301000005 STATUS .FROM TABLE 5. ZP/A 287 61 1978 2081301000006 HISTORY (781024C) PDJ. 2081301000007 (790219E) 2081301000008 (801208A) 2081301000009 (801218E) 2081301000010 ENDBIB 8 0 2081301000011 NOCOMMON 0 0 2081301000012 DATA 3 1 2081301000013 EN-DUMMY DATA DATA-ERR 2081301000014 EV FERMI FERMI 2081301000015 2.5300E-02-4.5000E+00 5.0000E-02 2081301000016 ENDDATA 3 0 2081301000017 ENDSUBENT 16 0 2081301099999 SUBENT 20813011 19840208 00002081301100001 BIB 3 5 2081301100002 REACTION (24-CR-50(N,EL)24-CR-50,POT,RAD) 2081301100003 STATUS (DEP ) DERIVED FROM SPIN DEPENDENT SCATTERING 2081301100004 LENGTHS. 2081301100005 HISTORY (781024C) PDJ. 2081301100006 (790219E) 2081301100007 ENDBIB 5 0 2081301100008 NOCOMMON 0 0 2081301100009 DATA 3 1 2081301100010 EN-DUMMY DATA DATA-ERR 2081301100011 EV FERMI FERMI 2081301100012 2.5300E-02 4.9500E+00 3.0000E-01 2081301100013 ENDDATA 3 0 2081301100014 ENDSUBENT 13 0 2081301199999 SUBENT 20813012 19840208 00002081301200001 BIB 4 7 2081301200002 REACTION (24-CR-52(N,SCT)24-CR-52,FA,SIG) FREE SCATTERING 2081301200003 CROSS SECTION. 2081301200004 SAMPLE .ISOTOPIC COMPOSITIONS 99.83,99.1 AND 83.76PERCENT 2081301200005 STATUS (DEP ) DERIVED FROM MEASURED COHERENT SCATTERING 2081301200006 AMPLITUDE. TABLE 7. 2081301200007 HISTORY (781024C) PDJ. 2081301200008 (790219E) 2081301200009 ENDBIB 7 0 2081301200010 NOCOMMON 0 0 2081301200011 DATA 3 1 2081301200012 EN-DUMMY DATA DATA-ERR 2081301200013 EV B B 2081301200014 2.5300E-02 2.9600E+00 2.0000E-02 2081301200015 ENDDATA 3 0 2081301200016 ENDSUBENT 15 0 2081301299999 SUBENT 20813013 19840208 00002081301300001 BIB 4 8 2081301300002 REACTION (24-CR-52(N,THS)24-CR-52,BA/COH,AMP) BOUND ATOM 2081301300003 COHERENT SCATTERING LENGTH. 2081301300004 SAMPLE .ISOTOPIC COMPOSITION CR-52 99.83PERCENT 2081301300005 STATUS .FROM TEXT ZP/A 287 61 1978 2081301300006 HISTORY (781024C) PDJ. 2081301300007 (790219E) 2081301300008 (801208A) 2081301300009 (801218E) 2081301300010 ENDBIB 8 0 2081301300011 NOCOMMON 0 0 2081301300012 DATA 3 1 2081301300013 EN-DUMMY DATA DATA-ERR 2081301300014 EV FERMI FERMI 2081301300015 2.5300E-02 4.9140E+00 1.5000E-02 2081301300016 ENDDATA 3 0 2081301300017 ENDSUBENT 16 0 2081301399999 SUBENT 20813014 19840208 00002081301400001 BIB 3 5 2081301400002 REACTION (24-CR-52(N,EL)24-CR-52,POT,RAD) 2081301400003 STATUS (DEP ) DERIVED FROM SPIN DEPENDENT SCATTERING 2081301400004 LENGTHS. 2081301400005 HISTORY (781024C) PDJ. 2081301400006 (790219E) 2081301400007 ENDBIB 5 0 2081301400008 NOCOMMON 0 0 2081301400009 DATA 3 1 2081301400010 EN-DUMMY DATA DATA-ERR 2081301400011 EV FERMI FERMI 2081301400012 2.5300E-02 5.9000E+00 3.0000E-01 2081301400013 ENDDATA 3 0 2081301400014 ENDSUBENT 13 0 2081301499999 SUBENT 20813015 19840208 00002081301500001 BIB 4 8 2081301500002 REACTION (24-CR-53(N,SCT)24-CR-53,INC,SIG) SPIN INCOHERENT 2081301500003 SCATTERING CROSS SECTION 2081301500004 SAMPLE .ISOTOPIC COMPOSITION 95.74 PERCENT 2081301500005 STATUS (DEP ) DERIVED FROM ISOTOPIC COHERENT SCATTERING 2081301500006 AMPLITUDE AND SPIN INCOHERENT CROSS SECTION OF 2081301500007 NATURAL COMPOSITION. ONLY CR-53 IS NOT SPIN ZERO. 2081301500008 HISTORY (781024C) PDJ. 2081301500009 (790219E) 2081301500010 ENDBIB 8 0 2081301500011 NOCOMMON 0 0 2081301500012 DATA 3 1 2081301500013 EN-DUMMY DATA DATA-ERR 2081301500014 EV B B 2081301500015 2.5300E-02 5.6800E+00 1.9000E-01 2081301500016 ENDDATA 3 0 2081301500017 ENDSUBENT 16 0 2081301599999 SUBENT 20813016 19840208 00002081301600001 BIB 4 8 2081301600002 REACTION (24-CR-53(N,SCT)24-CR-53,FA,SIG) FREE SCATTERING 2081301600003 CROSS SECTION. 2081301600004 SAMPLE .ISOTOPIC COMPOSITION 95.74 PERCENT 2081301600005 STATUS (DEP ) DERIVED FROM MEASURED COHERENT SCATTERING 2081301600006 AMPLITUDE EQUIVALENT PLUS DERIVED SPIN INCOHERENT 2081301600007 SCATTERING CROSS SECTION. 2081301600008 HISTORY (781024C) PDJ. 2081301600009 (790219E) 2081301600010 ENDBIB 8 0 2081301600011 NOCOMMON 0 0 2081301600012 DATA 3 1 2081301600013 EN-DUMMY DATA DATA-ERR 2081301600014 EV B B 2081301600015 2.5300E-02 7.7800E+00 2.0000E-01 2081301600016 ENDDATA 3 0 2081301600017 ENDSUBENT 16 0 2081301699999 SUBENT 20813017 19840208 00002081301700001 BIB 4 8 2081301700002 REACTION (24-CR-53(N,THS)24-CR-53,BA/COH,AMP) BOUND ATOM 2081301700003 COHERENT SCATTERING LENGTH. 2081301700004 SAMPLE .ISOTOPIC COMPOSITION CR-53 95.74PERCENT 2081301700005 STATUS .FROM TEXT ZP/A 287 61 1978 2081301700006 HISTORY (781024C) PDJ. 2081301700007 (790219E) 2081301700008 (801208A) 2081301700009 (801218E) 2081301700010 ENDBIB 8 0 2081301700011 NOCOMMON 0 0 2081301700012 DATA 3 1 2081301700013 EN-DUMMY DATA DATA-ERR 2081301700014 EV FERMI FERMI 2081301700015 2.5300E-02-4.2000E+00 2.3000E-02 2081301700016 ENDDATA 3 0 2081301700017 ENDSUBENT 16 0 2081301799999 SUBENT 20813018 19840208 00002081301800001 BIB 3 5 2081301800002 REACTION (24-CR-53(N,EL)24-CR-53,POT,RAD) 2081301800003 STATUS (DEP ) DERIVED FROM SPIN DEPENDENT SCATTERING 2081301800004 LENGTHS. 2081301800005 HISTORY (781024C) PDJ. 2081301800006 (790219E) 2081301800007 ENDBIB 5 0 2081301800008 NOCOMMON 0 0 2081301800009 DATA 3 1 2081301800010 EN-DUMMY DATA DATA-ERR 2081301800011 EV FERMI FERMI 2081301800012 2.5300E-02 6.9000E+00 3.0000E-01 2081301800013 ENDDATA 3 0 2081301800014 ENDSUBENT 13 0 2081301899999 SUBENT 20813019 19840208 00002081301900001 BIB 4 7 2081301900002 REACTION (24-CR-54(N,SCT)24-CR-54,FA,SIG) FREE SCATTERING 2081301900003 CROSS SECTION. 2081301900004 SAMPLE .ISOTOPIC COMPOSITION 90.60 PERCENT 2081301900005 STATUS (DEP ) DERIVED FROM MEASURED COHERENT SCATTERING 2081301900006 AMPLITUDE. TABLE 7. 2081301900007 HISTORY (781024C) PDJ. 2081301900008 (790219E) 2081301900009 ENDBIB 7 0 2081301900010 NOCOMMON 0 0 2081301900011 DATA 3 1 2081301900012 EN-DUMMY DATA DATA-ERR 2081301900013 EV B B 2081301900014 2.5300E-02 2.5400E+00 1.0000E-01 2081301900015 ENDDATA 3 0 2081301900016 ENDSUBENT 15 0 2081301999999 SUBENT 20813020 19840208 00002081302000001 BIB 4 8 2081302000002 REACTION (24-CR-54(N,THS)24-CR-54,BA/COH,AMP) BOUND ATOM 2081302000003 COHERENT SCATTERING LENGTH. 2081302000004 SAMPLE .ISOTOPIC COMPOSITION CR-54 90.60PERCENT 2081302000005 STATUS .FROM TEXT ZP/A 287 61 1978 2081302000006 HISTORY (781024C) PDJ. 2081302000007 (790219E) 2081302000008 (801208A) 2081302000009 (801218E) 2081302000010 ENDBIB 8 0 2081302000011 NOCOMMON 0 0 2081302000012 DATA 3 1 2081302000013 EN-DUMMY DATA DATA-ERR 2081302000014 EV FERMI FERMI 2081302000015 2.5300E-02 4.5500E+00 1.0000E-01 2081302000016 ENDDATA 3 0 2081302000017 ENDSUBENT 16 0 2081302099999 SUBENT 20813021 19840208 00002081302100001 BIB 3 5 2081302100002 REACTION (24-CR-54(N,EL)24-CR-54,POT,RAD) 2081302100003 STATUS (DEP ) DERIVED FROM SPIN DEPENDENT SCATTERING 2081302100004 LENGTHS. 2081302100005 HISTORY (781024C) PDJ. 2081302100006 (790219E) 2081302100007 ENDBIB 5 0 2081302100008 NOCOMMON 0 0 2081302100009 DATA 3 1 2081302100010 EN-DUMMY DATA DATA-ERR 2081302100011 EV FERMI FERMI 2081302100012 2.5300E-02 4.9000E+00 3.0000E-01 2081302100013 ENDDATA 3 0 2081302100014 ENDSUBENT 13 0 2081302199999 ENDENTRY 21 0 2081399999999