ENTRY C2605 20210504 C204C260500000001 SUBENT C2605001 20210504 C204C260500100001 BIB 8 14 C260500100002 TITLE High Energy Spallation and Fission Products of Uranium C260500100003 AUTHOR (P.R.O'Connor,G.T.Seaborg) C260500100004 REFERENCE (J,PR,74,1189,1948) C260500100005 #doi:10.1103/PhysRev.74.1189 C260500100006 INSTITUTE (1USAUCX,1USABRK) C260500100007 FACILITY (CYCLO,1USABRK) The Berkeley 184-inch cyclotron. C260500100008 DETECTOR (GEMUC) A thin-window, bell-jar type Geiger-Mueller C260500100009 counter under conditions of known counting C260500100010 efficiency. Conventional alpha-particle counters and C260500100011 an alpha-pulse analyzer were used for the C260500100012 alpha-emitters. C260500100013 SAMPLE The metallic uranium, 2-cm x 0.5-cm area and 0.1-cm C260500100014 thickness. C260500100015 HISTORY (20210504C) BP C260500100016 ENDBIB 14 0 C260500100017 COMMON 1 3 C260500100018 EN C260500100019 MEV C260500100020 380.0 C260500100021 ENDCOMMON 3 0 C260500100022 ENDSUBENT 21 0 C260500199999 SUBENT C2605002 20210504 C204C260500200001 BIB 3 8 C260500200002 REACTION (92-U-238(A,F),,SIG) C260500200003 ANALYSIS The total cross section for the fission reaction was C260500200004 estimated from the area under the fission part of C260500200005 the mass yield curve. This value must be considered to C260500200006 be a very rough one, because of the unknown intensity C260500200007 of the helium ion beam. C260500200008 STATUS (DEP,C2605003) C260500200009 (TABLE) page 1189. C260500200010 ENDBIB 8 0 C260500200011 NOCOMMON 0 0 C260500200012 DATA 1 1 C260500200013 DATA-APRX C260500200014 B C260500200015 2.0 C260500200016 ENDDATA 3 0 C260500200017 ENDSUBENT 16 0 C260500299999 SUBENT C2605003 20210504 C204C260500300001 BIB 7 28 C260500300002 REACTION ((92-U-238(A,X)ELEM/MASS,,PY)/ C260500300003 (92-U-238(A,X)56-BA-140,,PY)) C260500300004 METHOD (EXTB,CHSEP) After each of the irradiations, C260500300005 amounting to some 25 in number, the metallic uranium C260500300006 was dissolved, and the yield in weighed chemical C260500300007 reactions of each of several isotopes was determined C260500300008 by means of counting experiments using a C260500300009 Geiger-Mueller counter. The yield for each isotope C260500300010 was determined relative to a standard isotope, the C260500300011 12.8-day Ba140, in order to compensate for the C260500300012 day-to-day variation in intensity of the helium ion C260500300013 beam. C260500300014 CORRECTION Corrections were made for self-absorption, and for C260500300015 absorption by air and the mica window; C260500300016 back-scattering was insignificant in comparison with C260500300017 other factors. C260500300018 ERR-ANALYS (DATA-ERR) The errors indicated on this curve are C260500300019 estimated probable errors, arising from counting C260500300020 statistics, chemical operations, and correction C260500300021 factors applied. C260500300022 COMMENT 198,199Au and 236,238,239Np were shown as single data C260500300023 points, so maximum values were assigned to the nuclei. C260500300024 DECAY-DATA (56-BA-140,12.8D) C260500300025 (76-OS-193,15.0D) This half-life is now known to be C260500300026 about 30 hrs (comment by compiler) C260500300027 (48-CD-115-G,2.3D) C260500300028 (48-CD-115-M,43.0D) C260500300029 STATUS (CURVE) Fig. 1, page 1189. C260500300030 ENDBIB 28 0 C260500300031 COMMON 1 3 C260500300032 THICKNESS C260500300033 CM C260500300034 0.1 C260500300035 ENDCOMMON 3 0 C260500300036 DATA 6 24 C260500300037 ELEMENT MASS DATA DATA-MAX +DATA-ERR -DATA-ERR C260500300038 NO-DIM NO-DIM NO-DIM NO-DIM NO-DIM NO-DIM C260500300039 24.0 55.0 1.442E-05 1.511E-05 6.712E-06C260500300040 28.0 65.0 3.583E-05 2.227E-05 1.527E-05C260500300041 35.0 82.0 2.795E-04 1.071E-04 1.071E-04C260500300042 35.0 83.0 1.587E-03 8.508E-04 5.170E-04C260500300043 38.0 89.0 2.006E+00 5.258E-01 5.258E-01C260500300044 39.0 93.0 1.214E+00 6.852E-01 2.857E-01C260500300045 44.0 105.0 2.107E+00 2.811E-01 2.811E-01C260500300046 47.0 111.0 2.220E+00 2.962E-01 2.962E-01C260500300047 48.0 115.0 2.382E+00 3.183E-01 3.183E-01C260500300048 50.0 121.0 2.098E+00 2.799E-01 2.799E-01C260500300049 56.0 140.0 9.489E-01 1.555E-01 1.555E-01C260500300050 58.0 143.0 5.641E-01 1.010E-01 1.010E-01C260500300051 58.0 144.0 3.124E-01 6.120E-02 6.028E-02C260500300052 63.0 156.0 1.755E-01 8.934E-02 7.475E-02C260500300053 74.0 187.0 1.810E-03 2.099E-03 1.169E-03C260500300054 75.0 188.0 1.841E-03 2.066E-03 1.212E-03C260500300055 76.0 193.0 3.568E-03 1.288E-03 1.288E-03C260500300056 79.0 198.0 6.204E-03 2.447E-03 2.447E-03C260500300057 79.0 199.0 6.204E-03 2.447E-03 2.447E-03C260500300058 88.0 224.0 5.433E-03 8.917E-04 8.917E-04C260500300059 91.0 227.0 2.079E-02 3.713E-03 3.713E-03C260500300060 93.0 236.0 2.987E-01 4.888E-02 4.888E-02C260500300061 93.0 238.0 2.987E-01 4.888E-02 4.888E-02C260500300062 93.0 239.0 2.987E-01 4.888E-02 4.888E-02C260500300063 ENDDATA 26 0 C260500300064 ENDSUBENT 63 0 C260500399999 ENDENTRY 3 0 C260599999999