ENTRY C2482 20200225 C191C248200000001 SUBENT C2482001 20200225 C191C248200100001 BIB 7 19 C248200100002 TITLE The helium ion-induced fission of 181Ta at 41 and 65 C248200100003 MeV C248200100004 AUTHOR (R.D.Kieburtz,E.F.Neuzil) C248200100005 REFERENCE (J,JIN,34,3303,1972) C248200100006 #doi:10.1016/0022-1902(72)80223-9 C248200100007 REL-REF (M,C2473001,E.F.Neuzil,J,JIN,27,3,1965) C248200100008 Radiochemical techniques. C248200100009 INSTITUTE (1USAWWS) C248200100010 METHOD (CHSEP) A radiochemical study. Bombardments were C248200100011 accomplished with either the 41 MeV helium ion beam C248200100012 of the cyclotron at the University of Washington in C248200100013 Seattle, or the 65 MeV helium ion beam of the C248200100014 cyclotron at the University of California at C248200100015 Berkeley. In each case the bombarded targets were C248200100016 flown and/or driven to our laboratories here in C248200100017 Bellingham for analysis where the fission fragments C248200100018 were separated and purified using standard C248200100019 radiochemical techniques. C248200100020 HISTORY (20200225C) BP C248200100021 ENDBIB 19 0 C248200100022 NOCOMMON 0 0 C248200100023 ENDSUBENT 22 0 C248200199999 SUBENT C2482002 20200225 C191C248200200001 BIB 6 13 C248200200002 REACTION (73-TA-181(A,F)ELEM/MASS,,SIG) C248200200003 FACILITY (CYCLO,1USAWAU) 41 MeV helium ion beam of the cyclotronC248200200004 at the University of Washington in Seattle. C248200200005 SAMPLE The zone-refined tantalum metal used in this work was C248200200006 purchased from Semi-Elements Inc and came in the form C248200200007 of a rod about 1 in. long and I/8 in. in dia. The C248200200008 composition of the rod was determined by the seller C248200200009 to be 99.993% tantalum and 0.007% impurities. The C248200200010 targets, which weighed about 50 mg for the 41 MeV C248200200011 bombardments. C248200200012 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. C248200200013 FLAG (1.) Rejected because of probable target contamination.C248200200014 STATUS (TABLE) Table 1, page 3305. C248200200015 ENDBIB 13 0 C248200200016 COMMON 1 3 C248200200017 EN C248200200018 MEV C248200200019 41.0 C248200200020 ENDCOMMON 3 0 C248200200021 DATA 6 7 C248200200022 ELEMENT MASS DATA DATA-ERR DATA-ERR FLAG C248200200023 NO-DIM NO-DIM MICRO-B MICRO-B PER-CENT NO-DIM C248200200024 38.0 91.0 0.021 0.013 C248200200025 39.0 92.0 0.036 0.030 C248200200026 39.0 93.0 0.021 20.0 C248200200027 40.0 97.0 0.16 0.08 1.C248200200028 42.0 99.0 6.1 20.0 1.C248200200029 46.0 109.0 0.032 20.0 1.C248200200030 46.0 112.0 0.016 20.0 1.C248200200031 ENDDATA 9 0 C248200200032 ENDSUBENT 31 0 C248200299999 SUBENT C2482003 20200225 C191C248200300001 BIB 6 14 C248200300002 REACTION (73-TA-181(A,F)ELEM/MASS,,SIG) C248200300003 FACILITY (CYCLO,1USABRK) 65 MeV helium ion beam of the cyclotronC248200300004 at the University of California at Berkeley. C248200300005 SAMPLE The zone-refined tantalum metal used in this work was C248200300006 purchased from Semi-Elements Inc and came in the form C248200300007 of a rod about 1 in. long and I/8 in. in dia. The C248200300008 composition of the rod was determined by the seller C248200300009 to be 99.993% tantalum and 0.007% impurities. The C248200300010 targets, which weighed about 20 mg for the 65 MeV C248200300011 bombardments. C248200300012 ERR-ANALYS (DATA-ERR) All values given here have an error of C248200300013 about +-20%. C248200300014 FLAG (1.) Rejected because of probable target contamination.C248200300015 STATUS (TABLE) Table 1, page 3305. C248200300016 ENDBIB 14 0 C248200300017 COMMON 2 3 C248200300018 EN DATA-ERR C248200300019 MEV PER-CENT C248200300020 65.0 20.0 C248200300021 ENDCOMMON 3 0 C248200300022 DATA 4 9 C248200300023 ELEMENT MASS DATA FLAG C248200300024 NO-DIM NO-DIM MICRO-B NO-DIM C248200300025 38.0 91.0 2.2 C248200300026 38.0 92.0 4.0 C248200300027 39.0 93.0 4.5 C248200300028 40.0 97.0 0.42 C248200300029 42.0 99.0 5.9 1. C248200300030 46.0 109.0 0.86 1. C248200300031 47.0 111.0 5.6 1. C248200300032 47.0 112.0 16.0 1. C248200300033 47.0 113.0 4.8 1. C248200300034 ENDDATA 11 0 C248200300035 ENDSUBENT 34 0 C248200399999 SUBENT C2482004 20200225 C191C248200400001 BIB 3 8 C248200400002 REACTION (73-TA-181(A,F),,SIG,,,DERIV) C248200400003 ANALYSIS The total fission cross-sections were obtained C248200400004 in the usual manner by summing the individual fission C248200400005 fragment cross-sections over the resolved mass C248200400006 distribution curves. C248200400007 STATUS (DEP,C2482002) C248200400008 (DEP,C2482003) C248200400009 (TABLE) page 3303. Also shown in Fig. 3, page 3307. C248200400010 ENDBIB 8 0 C248200400011 NOCOMMON 0 0 C248200400012 DATA 2 2 C248200400013 EN DATA-APRX C248200400014 MEV MICRO-B C248200400015 41.0 0.1 C248200400016 65.0 23.0 C248200400017 ENDDATA 4 0 C248200400018 ENDSUBENT 17 0 C248200499999 ENDENTRY 4 0 C248299999999