ENTRY 21496 19820730 00002149600000001 SUBENT 21496001 19820730 00002149600100001 BIB 16 42 2149600100002 INSTITUTE (2SWTWUR) 2149600100003 REFERENCE (C,69VIENNA,,731,6908) PHYSICS AND CHEM. OF FISSION. 2149600100004 (R,EIR-157,,6906) 2149600100005 (P,EANDC(OR)-90L,,6906) 2149600100006 AUTHOR (K.F.FLYNN,H.R.VON GUNTEN) 2149600100007 TITLE -DISTRIBUTION OF MASS AND CHARGE IN THE FISSION OF 2149600100008 THORIUM 227.- 2149600100009 FACILITY (REAC,2SWTWUR) SWIMMING POOL REACTOR SAPHIR IN 2149600100010 WUERENLINGEN, SWITZERLAND. 2149600100011 INC-SOURCE (REAC ) REACTOR. NEUTRON FLUX 2.0E+13 N/CM**2/SEC. 2149600100012 INC-SPECT MAXWELLIAN NEUTRON SPECTRUM FROM REACTOR. 2149600100013 SAMPLE .TH-227 EXTRACTED FROM A 10. MILLI-CURIE SOURCE 2149600100014 OF AC-227 OBTAINED FROM RADIOCHEMICAL CENTRE 2149600100015 AMERSHAM (UK). THE GAMMA SPECTRA OF THESE SAMPLES 2149600100016 SHOWED ONLY LINES FROM TH-227. FROM THIS TH-227 2149600100017 FRAGMENT RECOIL SOURCES WERE PREPARED BY MOLECULAR 2149600100018 PLATING. 2149600100019 METHOD (CHSEP) STANDARD CHEMICAL SEPARATION METHODS. 2149600100020 .CATCHER FOIL TECHNIQUE USED. FOILS OF AL, MYLAR 2149600100021 AND POLYETHYLENE. 2149600100022 DETECTOR (PROPC) END WINDOW BETA PROPORTIONAL COUNTER, 2149600100023 (NAICR) 3 IN. * 3 IN. NA-I-(TL) CRYSTAL USED 2149600100024 AS GAMMA RAY SPECTROMETER. 2149600100025 (GELI ) 20 CC AS GAMMA DETECTOR IN 1 EXP. 2149600100026 PART-DET (B ) BETAS AND 2149600100027 (DG ) DECAY GAMMAS. 2149600100028 COMMENT .THE RESULTS ON AS-76 AND CD-115(-G AND -M) MAY BE 2149600100029 IN ERROR DUE TO (N,GAMMA) REACTIONS ON OTHER FISSION 2149600100030 PRODUCTS. 2149600100031 STATUS (NDD ) DATA TAKEN FROM NEUDADA. 2149600100032 HISTORY (800328T) G.C. 2149600100033 (800429E) 2149600100034 (820217E) 2149600100035 CORRECTION .ONLY A CHEMICAL YIELD CORRECTION WAS DONE (OTHER 2149600100036 CORRECTIONS ARE NOT NECESSARY OWING TO THE METHOD 2149600100037 USED). INTERFERENCE FROM NEUTRON INDUCED FISSION 2149600100038 PRODUCTS FROM AC-227 OR DAUGHTERS OF TH-227 IS 2149600100039 NEGLIGIBLE. 2149600100040 ERR-ANALYS .THE TOTAL ERROR INCLUDES 1 STANDARD DEVIATION OF 2149600100041 THE EXPERIMENTAL DETERMINATIONS AND THE UNCERTAINTY 2149600100042 OF THE U-235 YIELDS (NORMALIZATION), WHICH IS ESTIMA- 2149600100043 TED TO 5-10 PERC. 2149600100044 ENDBIB 42 0 2149600100045 COMMON 1 3 2149600100046 EN-DUMMY 2149600100047 EV 2149600100048 2.5300E-02 2149600100049 ENDCOMMON 3 0 2149600100050 ENDSUBENT 49 0 2149600199999 SUBENT 21496002 19800429 00002149600200001 BIB 3 5 2149600200002 REACTION (90-TH-227(N,F),PR,NU,,MXW) VALUE ESTIMATED 2149600200003 FROM MASS DISTRIBUTION. 2149600200004 STATUS (NDD ) DATA TAKEN FROM NEUDADA. 2149600200005 HISTORY (800328T) G.C. 2149600200006 (800429E) 2149600200007 ENDBIB 5 0 2149600200008 NOCOMMON 0 0 2149600200009 DATA 1 1 2149600200010 DATA-APRX 2149600200011 NO-DIM 2149600200012 1.0000E+00 2149600200013 ENDDATA 3 0 2149600200014 ENDSUBENT 13 0 2149600299999 SUBENT 21496003 19800429 00002149600300001 BIB 5 9 2149600300002 REACTION (90-TH-227(N,F)ELEM/MASS,CUM,FY,,MXW) 2149600300003 MONITOR (92-U-235(N,F)ELEM/MASS,CUM,FY,,MXW) DATA TAKEN 2149600300004 FROM CHART OF NUCLIDES AND FROM MEEK ET AL., 2149600300005 APED-5398-A(1968). 2149600300006 FLAG (1.) YIELD OF GROUND STATE. 2149600300007 (2.) YIELD OF METASTABLE STATE. 2149600300008 STATUS (NDD ) DATA TAKEN FROM NEUDADA. 2149600300009 HISTORY (800328T) G.C. 2149600300010 (800429E) 2149600300011 ENDBIB 9 0 2149600300012 NOCOMMON 0 0 2149600300013 DATA 5 28 2149600300014 ELEMENT MASS DATA DATA-ERR FLAG 2149600300015 NO-DIM NO-DIM PC/FIS PC/FIS NO-DIM 2149600300016 3.5000E+01 8.3000E+01 1.1000E+00 3.5000E-01 1.0000E+00 2149600300017 3.8000E+01 8.9000E+01 8.0000E+00 4.3000E-01 1.0000E+00 2149600300018 3.8000E+01 9.0000E+01 8.7200E+00 8.7000E-01 1.0000E+00 2149600300019 3.8000E+01 9.1000E+01 6.2100E+00 9.7000E-01 1.0000E+00 2149600300020 4.0000E+01 9.5000E+01 3.4000E+00 2.9000E-01 1.0000E+00 2149600300021 4.0000E+01 9.7000E+01 2.4100E+00 5.7000E-01 1.0000E+00 2149600300022 4.2000E+01 9.9000E+01 1.4400E+00 1.4000E-01 1.0000E+00 2149600300023 4.4000E+01 1.0300E+02 5.8000E-01 9.0000E-02 1.0000E+00 2149600300024 4.4000E+01 1.0500E+02 2.8000E-01 4.0000E-02 1.0000E+00 2149600300025 4.4000E+01 1.0600E+02 1.9000E-01 6.0000E-02 1.0000E+00 2149600300026 4.6000E+01 1.0900E+02 3.3000E-02 1.1000E-02 1.0000E+00 2149600300027 4.6000E+01 1.1200E+02 2.9000E-02 6.0000E-03 1.0000E+00 2149600300028 4.7000E+01 1.1100E+02 5.1000E-02 1.0000E-02 1.0000E+00 2149600300029 4.7000E+01 1.1300E+02 3.4000E-02 7.0000E-03 1.0000E+00 2149600300030 5.0000E+01 1.2100E+02 1.1000E-01 4.0000E-02 1.0000E+00 2149600300031 5.0000E+01 1.2500E+02 4.3000E-01 1.0000E-01 1.0000E+00 2149600300032 5.1000E+01 1.2700E+02 6.8000E-01 1.6000E-01 1.0000E+00 2149600300033 5.2000E+01 1.2700E+02 5.3000E-01 2.5000E-01 1.0000E+00 2149600300034 5.2000E+01 1.2900E+02 1.3600E+00 2.8000E-01 2.0000E+00 2149600300035 5.2000E+01 1.3200E+02 3.3000E+00 6.0000E-02 1.0000E+00 2149600300036 5.3000E+01 1.3100E+02 2.6100E+00 4.6000E-01 1.0000E+00 2149600300037 5.3000E+01 1.3300E+02 4.8000E+00 1.0100E+00 1.0000E+00 2149600300038 5.5000E+01 1.3700E+02 6.9300E+00 1.2400E+00 1.0000E+00 2149600300039 5.6000E+01 1.4000E+02 7.7100E+00 1.1600E+00 1.0000E+00 2149600300040 5.8000E+01 1.4100E+02 7.6200E+00 5.1000E-01 1.0000E+00 2149600300041 5.8000E+01 1.4300E+02 6.9700E+00 4.8000E-01 1.0000E+00 2149600300042 5.8000E+01 1.4400E+02 5.9500E+00 4.4000E-01 1.0000E+00 2149600300043 6.0000E+01 1.4700E+02 1.8000E-01 5.0000E-02 1.0000E+00 2149600300044 ENDDATA 30 0 2149600300045 ENDSUBENT 44 0 2149600399999 SUBENT 21496004 19800429 00002149600400001 BIB 4 7 2149600400002 REACTION (90-TH-227(N,F)ELEM/MASS,CUM,FY,,MXW) 2149600400003 MONITOR (92-U-235(N,F)ELEM/MASS,CUM,FY,,MXW) DATA TAKEN 2149600400004 FROM CHART OF NUCLIDES AND FROM MEEK ET AL., 2149600400005 APED-5398-A(1968). 2149600400006 STATUS (NDD ) DATA TAKEN FROM NEUDADA. 2149600400007 HISTORY (800328T) G.C. 2149600400008 (800429E) 2149600400009 ENDBIB 7 0 2149600400010 NOCOMMON 0 0 2149600400011 DATA 3 2 2149600400012 ELEMENT MASS DATA-MAX 2149600400013 NO-DIM NO-DIM PC/FIS 2149600400014 3.3000E+01 7.7000E+01 1.4000E+00 2149600400015 4.8000E+01 1.1500E+02 1.7700E-01 2149600400016 ENDDATA 4 0 2149600400017 ENDSUBENT 16 0 2149600499999 SUBENT 21496005 19820730 00002149600500001 BIB 4 5 2149600500002 REACTION (90-TH-227(N,F)55-CS-136,IND,FY,,MXW) 2149600500003 MONITOR (92-U-235(N,F)55-CS-136,IND,FY,,MXW) TAKEN FROM 2149600500004 MEEK ET AL.,APED-5398-A(1968). 2149600500005 STATUS (NDD ) DATA TAKEN FROM NEUDADA. 2149600500006 HISTORY (820119A) DATA VALUES CORRECTED. 2149600500007 ENDBIB 5 0 2149600500008 NOCOMMON 0 0 2149600500009 DATA 3 1 2149600500010 MONIT DATA DATA-ERR 2149600500011 PC/FIS PC/FIS PC/FIS 2149600500012 6.0000E-03 1.0000E-01 4.0000E-02 2149600500013 ENDDATA 3 0 2149600500014 ENDSUBENT 13 0 2149600599999 SUBENT 21496006 19800429 00002149600600001 BIB 3 6 2149600600002 REACTION (90-TH-227(N,F)MASS,,ZP,,MXW) FROM INDEPENDENT 2149600600003 YIELD OF CS-136, ASSUMING A GAUSSIAN DISTRIBU- 2149600600004 TION OF Z(A=136) WITH SIGMA=0.62+-0.06. 2149600600005 STATUS (NDD ) DATA TAKEN FROM NEUDADA. 2149600600006 HISTORY (800328T) G.C. 2149600600007 (800429E) 2149600600008 ENDBIB 6 0 2149600600009 NOCOMMON 0 0 2149600600010 DATA 2 1 2149600600011 MASS DATA 2149600600012 NO-DIM NO-DIM 2149600600013 1.3600E+02 5.3200E+01 2149600600014 ENDDATA 3 0 2149600600015 ENDSUBENT 14 0 2149600699999 ENDENTRY 6 0 2149699999999