ENTRY C2512 20200327 C194C251200000001 SUBENT C2512001 20200327 C194C251200100001 BIB 12 32 C251200100002 TITLE Emission of intermediate mass fragments during fission C251200100003 AUTHOR (S.L.Chen,R.T.de Souza,E.Cornell,B.Davin,T.M.Hamilton, C251200100004 D.Hulbert,K.Kwiatkowski,Y.Lou,V.E.Viola,R.G.Korteling, C251200100005 J.L.Wile) C251200100006 REFERENCE (J,PR/C,54,R2114,1996) C251200100007 #doi:10.1103/PhysRevC.54.R2114 C251200100008 REL-REF (O,C2520001,D.E.Fields+,J,PRL,69,3713,1992) C251200100009 He3 particle beam data. C251200100010 INSTITUTE (1USAINU,1CANSFU,1USABSU) C251200100011 FACILITY (CYCLO,1USAINU) The Indiana University Cyclotron C251200100012 Facility. C251200100013 INC-SPECT The beam intensity was typically ~9x10**9 p/s. C251200100014 SAMPLE A self-supporting ~700 microg/cm2 232Th foil. C251200100015 DETECTOR (TELES,IOCH,SISD,CSICR) Each IMF telescope consisted C251200100016 of an axial-field ionization chamber operated at 18 C251200100017 torr of CF4, a 300 microm passivated ion-implanted C251200100018 silicon detector and a 3 cm thick CsI(Tl) crystal C251200100019 readout with a photodiode. The small Si detectors C251200100020 each had an active area of 3 cm x 3 cm. The large Si C251200100021 detectors each had an active area of 5 cm x 5 cm and C251200100022 consisted of a quadrant design. C251200100023 PART-DET (FF) C251200100024 METHOD (EDE,TOF) Charged particles that entered the silicon C251200100025 detector were identified by the dE-E technique. In C251200100026 addition, charged particles were also mass-identified C251200100027 by utilizing the time-of-flight technique with C251200100028 reference to the cyclotron RF pulse. The timing C251200100029 resolution achieved in the experiment was sufficient C251200100030 to resolve isotopes of elements with Z<4. Energy C251200100031 calibration of the detectors was performed by use of C251200100032 a 228Th a source and a precision pulser. C251200100033 HISTORY (20200327C) BP C251200100034 ENDBIB 32 0 C251200100035 COMMON 1 3 C251200100036 EN C251200100037 MEV C251200100038 200.0 C251200100039 ENDCOMMON 3 0 C251200100040 ENDSUBENT 39 0 C251200199999 SUBENT C2512002 20200327 C194C251200200001 BIB 3 3 C251200200002 REACTION (90-TH-232(A,F)ELEM,,DA/DE,,REL) C251200200003 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. C251200200004 STATUS (CURVE) Fig. 3, page R2115. C251200200005 ENDBIB 3 0 C251200200006 COMMON 2 3 C251200200007 ANG ELEMENT C251200200008 ADEG NO-DIM C251200200009 90.0 3.0 C251200200010 ENDCOMMON 3 0 C251200200011 DATA 3 14 C251200200012 E DATA DATA-ERR C251200200013 MEV ARB-UNITS ARB-UNITS C251200200014 10.152 26.981 1.355 C251200200015 13.144 27.508 2.164 C251200200016 16.136 28.306 2.436 C251200200017 19.306 24.778 1.628 C251200200018 22.506 35.034 2.430 C251200200019 25.552 60.966 2.702 C251200200020 28.561 69.331 3.244 C251200200021 31.502 46.345 2.431 C251200200022 34.644 29.844 2.433 C251200200023 37.609 17.669 1.892 C251200200024 40.583 10.088 1.890 C251200200025 43.751 5.479 2.164 C251200200026 46.738 4.114 2.159 C251200200027 49.723 1.127 1.620 C251200200028 ENDDATA 16 0 C251200200029 ENDSUBENT 28 0 C251200299999 SUBENT C2512003 20200327 C194C251200300001 BIB 3 3 C251200300002 REACTION (90-TH-232(A,F)ELEM,,DA/DE,,REL) C251200300003 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. C251200300004 STATUS (CURVE) Fig. 3, page R2115. C251200300005 ENDBIB 3 0 C251200300006 COMMON 2 3 C251200300007 ANG ELEMENT C251200300008 ADEG NO-DIM C251200300009 50.0 3.0 C251200300010 ENDCOMMON 3 0 C251200300011 DATA 3 12 C251200300012 E DATA DATA-ERR C251200300013 MEV ARB-UNITS ARB-UNITS C251200300014 10.120 12.117 2.164 C251200300015 13.281 4.265 2.164 C251200300016 16.269 3.170 1.892 C251200300017 19.274 9.643 2.163 C251200300018 22.296 24.224 3.247 C251200300019 25.346 51.778 4.868 C251200300020 28.529 54.466 4.868 C251200300021 31.471 32.021 3.783 C251200300022 34.438 20.926 3.243 C251200300023 37.411 12.805 2.973 C251200300024 40.762 6.303 2.160 C251200300025 46.736 2.762 1.622 C251200300026 ENDDATA 14 0 C251200300027 ENDSUBENT 26 0 C251200399999 SUBENT C2512004 20200327 C194C251200400001 BIB 3 3 C251200400002 REACTION (90-TH-232(A,F)ELEM,,DA/DE,,REL) C251200400003 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. C251200400004 STATUS (CURVE) Fig. 3, page R2115. C251200400005 ENDBIB 3 0 C251200400006 COMMON 2 3 C251200400007 ANG ELEMENT C251200400008 ADEG NO-DIM C251200400009 90.0 4.0 C251200400010 ENDCOMMON 3 0 C251200400011 DATA 3 17 C251200400012 E DATA DATA-ERR C251200400013 MEV ARB-UNITS ARB-UNITS C251200400014 9.750 25.946 2.162 C251200400015 12.750 31.081 1.892 C251200400016 15.938 36.486 1.892 C251200400017 18.750 33.243 2.162 C251200400018 21.938 27.838 2.162 C251200400019 24.937 20.540 1.622 C251200400020 27.750 15.135 1.622 C251200400021 30.938 18.919 1.622 C251200400022 33.938 19.189 1.892 C251200400023 36.938 14.324 2.703 C251200400024 39.938 6.757 1.622 C251200400025 42.938 5.135 1.622 C251200400026 46.125 1.351 1.351 C251200400027 49.125 0.811 1.892 C251200400028 52.125 0.811 1.622 C251200400029 55.312 0.811 1.622 C251200400030 58.125 0.270 1.892 C251200400031 ENDDATA 19 0 C251200400032 ENDSUBENT 31 0 C251200499999 SUBENT C2512005 20200327 C194C251200500001 BIB 3 3 C251200500002 REACTION (90-TH-232(A,F)ELEM,,DA/DE,,REL) C251200500003 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. C251200500004 STATUS (CURVE) Fig. 3, page R2115. C251200500005 ENDBIB 3 0 C251200500006 COMMON 2 3 C251200500007 ANG ELEMENT C251200500008 ADEG NO-DIM C251200500009 50.0 4.0 C251200500010 ENDCOMMON 3 0 C251200500011 DATA 3 12 C251200500012 E DATA DATA-ERR C251200500013 MEV ARB-UNITS ARB-UNITS C251200500014 9.938 5.405 1.622 C251200500015 12.938 2.973 1.351 C251200500016 15.938 4.865 1.351 C251200500017 19.125 1.351 1.622 C251200500018 22.125 1.622 1.351 C251200500019 24.750 4.324 1.351 C251200500020 27.750 8.108 2.162 C251200500021 30.938 15.135 2.703 C251200500022 34.125 20.540 2.973 C251200500023 36.938 15.135 2.703 C251200500024 39.938 4.054 2.162 C251200500025 42.938 4.054 1.622 C251200500026 ENDDATA 14 0 C251200500027 ENDSUBENT 26 0 C251200599999 SUBENT C2512006 20200327 C194C251200600001 BIB 3 3 C251200600002 REACTION (90-TH-232(A,F)ELEM,,DA/DE,,REL) C251200600003 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. C251200600004 STATUS (CURVE) Fig. 3, page R2115. C251200600005 ENDBIB 3 0 C251200600006 COMMON 2 3 C251200600007 ANG ELEMENT C251200600008 ADEG NO-DIM C251200600009 90.0 5.0 C251200600010 ENDCOMMON 3 0 C251200600011 DATA 3 16 C251200600012 E DATA DATA-ERR C251200600013 MEV ARB-UNITS ARB-UNITS C251200600014 10.062 4.130 0.729 C251200600015 13.230 7.044 0.729 C251200600016 16.211 8.583 0.972 C251200600017 19.193 6.559 0.729 C251200600018 22.360 9.474 0.972 C251200600019 25.342 7.935 0.729 C251200600020 28.509 6.073 0.729 C251200600021 31.304 3.239 0.648 C251200600022 34.658 4.130 0.648 C251200600023 37.453 3.806 0.648 C251200600024 40.621 4.777 0.729 C251200600025 43.789 2.429 0.810 C251200600026 46.770 2.186 0.567 C251200600027 49.752 0.405 0.486 C251200600028 52.733 0.567 0.567 C251200600029 55.901 0.324 0.648 C251200600030 ENDDATA 18 0 C251200600031 ENDSUBENT 30 0 C251200699999 SUBENT C2512007 20200327 C194C251200700001 BIB 3 3 C251200700002 REACTION (90-TH-232(A,F)ELEM,,DA/DE,,REL) C251200700003 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. C251200700004 STATUS (CURVE) Fig. 3, page R2115. C251200700005 ENDBIB 3 0 C251200700006 COMMON 2 3 C251200700007 ANG ELEMENT C251200700008 ADEG NO-DIM C251200700009 50.0 5.0 C251200700010 ENDCOMMON 3 0 C251200700011 DATA 3 13 C251200700012 E DATA DATA-ERR C251200700013 MEV ARB-UNITS ARB-UNITS C251200700014 10.248 0.729 0.729 C251200700015 13.230 1.377 0.810 C251200700016 16.211 0.243 0.486 C251200700017 22.547 0.405 0.324 C251200700018 25.342 1.781 0.810 C251200700019 28.323 0.972 0.729 C251200700020 31.491 1.457 0.810 C251200700021 34.472 2.429 0.972 C251200700022 37.453 2.753 1.053 C251200700023 40.621 2.753 1.053 C251200700024 46.770 1.700 0.729 C251200700025 49.565 1.457 0.810 C251200700026 52.733 1.053 0.648 C251200700027 ENDDATA 15 0 C251200700028 ENDSUBENT 27 0 C251200799999 SUBENT C2512008 20200327 C194C251200800001 BIB 3 3 C251200800002 REACTION (90-TH-232(A,F)ELEM,,DA/DE,,REL) C251200800003 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. C251200800004 STATUS (CURVE) Fig. 3, page R2115. C251200800005 ENDBIB 3 0 C251200800006 COMMON 2 3 C251200800007 ANG ELEMENT C251200800008 ADEG NO-DIM C251200800009 90.0 6.0 C251200800010 ENDCOMMON 3 0 C251200800011 DATA 3 17 C251200800012 E DATA DATA-ERR C251200800013 MEV ARB-UNITS ARB-UNITS C251200800014 9.911 4.906 0.726 C251200800015 12.930 10.144 1.048 C251200800016 15.944 14.737 1.129 C251200800017 18.936 16.184 1.129 C251200800018 21.938 19.084 1.290 C251200800019 24.899 16.176 1.209 C251200800020 27.866 14.156 1.129 C251200800021 30.828 11.572 1.209 C251200800022 33.990 10.680 1.048 C251200800023 36.936 5.757 0.726 C251200800024 39.912 5.027 0.887 C251200800025 42.882 3.491 0.725 C251200800026 45.675 3.245 0.968 C251200800027 48.836 2.193 0.484 C251200800028 51.811 1.302 0.565 C251200800029 54.975 0.894 0.483 C251200800030 57.954 0.568 0.323 C251200800031 ENDDATA 19 0 C251200800032 ENDSUBENT 31 0 C251200899999 SUBENT C2512009 20200327 C194C251200900001 BIB 3 3 C251200900002 REACTION (90-TH-232(A,F)ELEM,,DA/DE,,REL) C251200900003 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. C251200900004 STATUS (CURVE) Fig. 3, page R2115. C251200900005 ENDBIB 3 0 C251200900006 COMMON 2 3 C251200900007 ANG ELEMENT C251200900008 ADEG NO-DIM C251200900009 50.0 6.0 C251200900010 ENDCOMMON 3 0 C251200900011 DATA 3 11 C251200900012 E DATA DATA-ERR C251200900013 MEV ARB-UNITS ARB-UNITS C251200900014 9.919 6.035 1.372 C251200900015 12.734 8.773 1.775 C251200900016 16.047 3.124 0.967 C251200900017 18.830 1.427 0.645 C251200900018 21.810 1.261 0.565 C251200900019 27.960 1.414 0.806 C251200900020 36.907 1.725 0.806 C251200900021 39.715 3.495 0.887 C251200900022 42.886 4.055 1.209 C251200900023 48.843 3.160 1.211 C251200900024 51.813 1.624 0.968 C251200900025 ENDDATA 13 0 C251200900026 ENDSUBENT 25 0 C251200999999 SUBENT C2512010 20200327 C194C251201000001 BIB 3 3 C251201000002 REACTION (90-TH-232(A,F)ELEM,,DA/DE,,REL) C251201000003 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. C251201000004 STATUS (CURVE) Fig. 3, page R2115. C251201000005 ENDBIB 3 0 C251201000006 COMMON 2 3 C251201000007 ANG ELEMENT C251201000008 ADEG NO-DIM C251201000009 90.0 7.0 C251201000010 ENDCOMMON 3 0 C251201000011 DATA 3 17 C251201000012 E DATA DATA-ERR C251201000013 MEV ARB-UNITS ARB-UNITS C251201000014 10.256 0.363 0.429 C251201000015 13.277 2.415 0.460 C251201000016 16.288 4.007 0.644 C251201000017 19.441 3.239 0.552 C251201000018 22.628 4.249 0.583 C251201000019 25.608 4.156 0.644 C251201000020 28.574 3.388 0.675 C251201000021 31.548 2.988 0.521 C251201000022 34.510 1.975 0.429 C251201000023 37.669 1.483 0.399 C251201000024 40.649 1.389 0.399 C251201000025 43.802 0.621 0.490 C251201000026 46.982 1.294 0.337 C251201000027 49.947 0.434 0.215 C251201000028 52.928 0.402 0.215 C251201000029 55.910 0.431 0.245 C251201000030 59.074 0.215 0.123 C251201000031 ENDDATA 19 0 C251201000032 ENDSUBENT 31 0 C251201099999 SUBENT C2512011 20200327 C194C251201100001 BIB 3 3 C251201100002 REACTION (90-TH-232(A,F)ELEM,,DA/DE,,REL) C251201100003 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. C251201100004 STATUS (CURVE) Fig. 3, page R2115. C251201100005 ENDBIB 3 0 C251201100006 COMMON 2 3 C251201100007 ANG ELEMENT C251201100008 ADEG NO-DIM C251201100009 50.0 7.0 C251201100010 ENDCOMMON 3 0 C251201100011 DATA 3 8 C251201100012 E DATA DATA-ERR C251201100013 MEV ARB-UNITS ARB-UNITS C251201100014 13.296 3.457 1.165 C251201100015 16.418 1.034 0.613 C251201100016 19.406 1.369 0.705 C251201100017 22.553 0.295 0.368 C251201100018 28.524 0.691 0.521 C251201100019 46.963 0.283 0.398 C251201100020 52.746 0.617 0.582 C251201100021 58.895 0.644 0.521 C251201100022 ENDDATA 10 0 C251201100023 ENDSUBENT 22 0 C251201199999 SUBENT C2512012 20200327 C194C251201200001 BIB 3 3 C251201200002 REACTION (90-TH-232(A,F)ELEM,,DA/DE,,REL) C251201200003 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. C251201200004 STATUS (CURVE) Fig. 3, page R2115. C251201200005 ENDBIB 3 0 C251201200006 COMMON 2 3 C251201200007 ANG ELEMENT C251201200008 ADEG NO-DIM C251201200009 90.0 8.0 C251201200010 ENDCOMMON 3 0 C251201200011 DATA 3 17 C251201200012 E DATA DATA-ERR C251201200013 MEV ARB-UNITS ARB-UNITS C251201200014 9.908 0.116 0.211 C251201200015 12.926 1.503 0.332 C251201200016 16.142 3.524 0.815 C251201200017 19.164 5.153 0.694 C251201200018 22.142 4.487 0.634 C251201200019 25.115 3.580 0.603 C251201200020 27.948 5.088 0.664 C251201200021 31.101 3.818 0.573 C251201200022 34.100 4.240 0.634 C251201200023 37.060 2.668 0.453 C251201200024 40.029 1.520 0.393 C251201200025 43.009 1.005 0.302 C251201200026 45.994 0.671 0.272 C251201200027 49.169 0.549 0.302 C251201200028 52.164 0.789 0.302 C251201200029 55.143 0.153 0.151 C251201200030 58.132 0.092 0.181 C251201200031 ENDDATA 19 0 C251201200032 ENDSUBENT 31 0 C251201299999 SUBENT C2512013 20200327 C194C251201300001 BIB 3 3 C251201300002 REACTION (90-TH-232(A,F)ELEM,,DA/DE,,REL) C251201300003 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. C251201300004 STATUS (CURVE) Fig. 3, page R2115. C251201300005 ENDBIB 3 0 C251201300006 COMMON 2 3 C251201300007 ANG ELEMENT C251201300008 ADEG NO-DIM C251201300009 50.0 8.0 C251201300010 ENDCOMMON 3 0 C251201300011 DATA 3 10 C251201300012 E DATA DATA-ERR C251201300013 MEV ARB-UNITS ARB-UNITS C251201300014 13.097 0.718 0.484 C251201300015 16.147 3.796 1.147 C251201300016 18.959 4.187 1.178 C251201300017 22.103 2.464 0.815 C251201300018 25.060 0.712 0.543 C251201300019 31.034 0.347 0.362 C251201300020 37.015 0.344 0.362 C251201300021 43.004 0.733 0.604 C251201300022 49.186 1.424 0.664 C251201300023 55.146 0.335 0.393 C251201300024 ENDDATA 12 0 C251201300025 ENDSUBENT 24 0 C251201399999 SUBENT C2512014 20200327 C194C251201400001 BIB 4 26 C251201400002 REACTION (90-TH-232(A,F)ELEM,,SIG,,MSC) Low-energy/focused C251201400003 emission. C251201400004 ANALYSIS The cross-section was calculated from the number of C251201400005 interactions, the integrated beam current, and the C251201400006 target thickness and agreed with the previously C251201400007 measured binary fission cross section to within 5%. C251201400008 The efficiency for detecting ternary events was C251201400009 calculated using the measured IMF energy C251201400010 distribution. The angular distribution of neck C251201400011 fragments was assumed to be a Gaussian with a width C251201400012 of 15 degrees. C251201400013 ERR-ANALYS (DATA-ERR,,10.) We estimate the uncertainty in cross C251201400014 section to be less than 10%. C251201400015 STATUS (DEP,C2512002) C251201400016 (DEP,C2512003) C251201400017 (DEP,C2512004) C251201400018 (DEP,C2512005) C251201400019 (DEP,C2512006) C251201400020 (DEP,C2512007) C251201400021 (DEP,C2512008) C251201400022 (DEP,C2512009) C251201400023 (DEP,C2512010) C251201400024 (DEP,C2512011) C251201400025 (DEP,C2512012) C251201400026 (DEP,C2512013) C251201400027 (CURVE) Fig. 5a, page R2117. C251201400028 ENDBIB 26 0 C251201400029 NOCOMMON 0 0 C251201400030 DATA 2 7 C251201400031 ELEMENT DATA C251201400032 NO-DIM MICRO-B C251201400033 2.000 8.141E+03 C251201400034 3.000 6.766E+01 C251201400035 4.000 1.254E+02 C251201400036 5.000 4.578E+01 C251201400037 6.000 1.334E+02 C251201400038 7.000 4.131E+01 C251201400039 8.000 6.362E+01 C251201400040 ENDDATA 9 0 C251201400041 ENDSUBENT 40 0 C251201499999 SUBENT C2512015 20200327 C194C251201500001 BIB 4 26 C251201500002 REACTION (90-TH-232(A,F)ELEM,,SIG,,MSC) High-energy/isotropic C251201500003 emission. C251201500004 ANALYSIS The cross-section was calculated from the number of C251201500005 interactions, the integrated beam current, and the C251201500006 target thickness and agreed with the previously C251201500007 measured binary fission cross section to within 5%. C251201500008 The efficiency for detecting ternary events was C251201500009 calculated using the measured IMF energy C251201500010 distribution. The angular distribution of neck C251201500011 fragments was assumed to be a Gaussian with a width C251201500012 of 15 degrees. C251201500013 ERR-ANALYS (DATA-ERR,,10.) We estimate the uncertainty in cross C251201500014 section to be less than 10%. C251201500015 STATUS (DEP,C2512002) C251201500016 (DEP,C2512003) C251201500017 (DEP,C2512004) C251201500018 (DEP,C2512005) C251201500019 (DEP,C2512006) C251201500020 (DEP,C2512007) C251201500021 (DEP,C2512008) C251201500022 (DEP,C2512009) C251201500023 (DEP,C2512010) C251201500024 (DEP,C2512011) C251201500025 (DEP,C2512012) C251201500026 (DEP,C2512013) C251201500027 (CURVE) Fig. 5a, page R2117. C251201500028 ENDBIB 26 0 C251201500029 NOCOMMON 0 0 C251201500030 DATA 2 6 C251201500031 ELEMENT DATA C251201500032 NO-DIM MICRO-B C251201500033 3.000 4.870E+02 C251201500034 4.000 2.276E+02 C251201500035 5.000 6.494E+01 C251201500036 6.000 9.023E+01 C251201500037 7.000 3.295E+01 C251201500038 8.000 3.363E+01 C251201500039 ENDDATA 8 0 C251201500040 ENDSUBENT 39 0 C251201599999 ENDENTRY 15 0 C251299999999