ENTRY L0239 20210831 L046L023900000001 SUBENT L0239001 20210831 L046L023900100001 BIB 8 24 L023900100002 TITLE Near-barrier photofission in 232Th and 238U L023900100003 AUTHOR (J.A.Silano,H.J.Karwowski) L023900100004 INSTITUTE (1USALRL,1USATNL,1USAUNC) L023900100005 REFERENCE (J,PR/C,98,054609,2018) L023900100006 FACILITY (ESTRG,1USATNL) Experiment performed at HIgS facility L023900100007 at at the Triangle Universities Nuclear Laboratory L023900100008 DETECTOR (PROPC,HE3SP) Neutrons were detected using an assembly L023900100009 of 18 tubular proportional counters, filled with 3He L023900100010 gas at approx. 6 atm. The tubes are arranged in two L023900100011 concentric rings of radii 7.24 cm and 10.60 cm, each L023900100012 containing nine equally spaced counters. The counters L023900100013 are embedded in a cylindrical polyethylene body 46.2cm L023900100014 long and 30.5 cm in diameter which serves as a neutron L023900100015 moderator. L023900100016 INC-SOURCE (LCS) The HIgS facility produces a quasi- L023900100017 monoenergetic Compton backscattered photon beam L023900100018 tunable in wide energy range with either linear or L023900100019 circular polarization. Electron storage ring was L023900100020 operated at energies of 420-520 MeV with typical L023900100021 electron storage ring current of 90 mA. FEL photons L023900100022 wavelength was 780nm, which resulted in gamma ray beamsL023900100023 with energy of 4.3-6.3 MeV L023900100024 HISTORY (20191001C) Compiled by S.H. L023900100025 (20210830A) OS. Data units corrected in subs.2,3 L023900100026 ENDBIB 24 0 L023900100027 NOCOMMON 0 0 L023900100028 ENDSUBENT 27 0 L023900199999 SUBENT L0239002 20210831 L046L023900200001 BIB 5 10 L023900200002 REACTION (90-TH-232(G,F),,SIG) L023900200003 SAMPLE (90-TH-232,ENR=0.9998) Natural Th sample, which L023900200004 contains trace amounts of 227-231,234Th. L023900200005 Target was made of 5 identical disks with thickness L023900200006 of 2.00 mm and diameter 25.40mm. Total weight was L023900200007 (59.5+-0.1)g and thickness (10.00+-0.02) mm. L023900200008 ERR-ANALYS (ERR-S) Statistical uncertainty L023900200009 (ERR-SYS) Systematic uncertainty L023900200010 STATUS (TABLE) Data taken from tab.2 of the reference L023900200011 HISTORY (20210830A) Data units corrected L023900200012 ENDBIB 10 0 L023900200013 COMMON 1 3 L023900200014 ERR-SYS L023900200015 PER-CENT L023900200016 3.0 L023900200017 ENDCOMMON 3 0 L023900200018 DATA 4 15 L023900200019 EN EN-RSL DATA ERR-S L023900200020 MEV MEV MICRO-B MICRO-B L023900200021 4.7 0.071 -0.4 0.2 L023900200022 4.8 0.072 -0.04 0.1 L023900200023 4.9 0.074 -0.4 0.1 L023900200024 5. 0.075 0.3 0.07 L023900200025 5.1 0.077 0.27 0.06 L023900200026 5.2 0.078 3.73 0.09 L023900200027 5.25 0.079 7.4 0.2 L023900200028 5.3 0.08 22.7 0.2 L023900200029 5.4 0.081 92.9 0.3 L023900200030 5.5 0.083 203.8 0.5 L023900200031 5.55 0.083 227.3 0.5 L023900200032 5.6 0.084 248. 0.5 L023900200033 5.65 0.085 235.1 0.5 L023900200034 5.7 0.089 277.1 0.5 L023900200035 5.8 0.087 799. 3. L023900200036 ENDDATA 17 0 L023900200037 ENDSUBENT 36 0 L023900299999 SUBENT L0239003 20210831 L046L023900300001 BIB 5 9 L023900300002 REACTION (92-U-238(G,F),,SIG) L023900300003 SAMPLE (92-U-238,ENR=0.99) Target was composed of 8 disks L023900300004 of depleted uranium with thickness from 0.51 to 0.81mm.L023900300005 Total weight was (53.67+-0.01)g and thickness L023900300006 (5.06+-0.03) mm. Sample enrichment is larger than 99%.L023900300007 ERR-ANALYS (ERR-S) Statistical uncertainty L023900300008 (ERR-SYS) Systematic uncertainty L023900300009 STATUS (TABLE) Data taken from tab.3 of the reference L023900300010 HISTORY (20210830A) Data units corrected L023900300011 ENDBIB 9 0 L023900300012 COMMON 1 3 L023900300013 ERR-SYS L023900300014 PER-CENT L023900300015 3.0 L023900300016 ENDCOMMON 3 0 L023900300017 DATA 4 17 L023900300018 EN EN-RSL DATA ERR-S L023900300019 MEV MEV MICRO-B MICRO-B L023900300020 4.3 0.065 -0.3 0.2 L023900300021 4.4 0.066 -0.08 0.1 L023900300022 4.5 0.068 -0.06 0.1 L023900300023 4.6 0.069 0.5 0.1 L023900300024 4.7 0.071 1.2 0.2 L023900300025 4.8 0.072 3.5 0.2 L023900300026 4.9 0.074 8.9 0.3 L023900300027 5. 0.075 23.3 0.2 L023900300028 5.1 0.077 37. 0.2 L023900300029 5.15 0.077 52.7 0.2 L023900300030 5.2 0.078 88. 0.3 L023900300031 5.3 0.080 215.6 0.6 L023900300032 5.6 0.084 2330. 5. L023900300033 5.7 0.086 2639. 6. L023900300034 5.8 0.087 2722. 6. L023900300035 5.9 0.089 3798. 7. L023900300036 6. 0.090 7060. 10. L023900300037 ENDDATA 19 0 L023900300038 ENDSUBENT 37 0 L023900399999 SUBENT L0239004 20181001 L043L023900400001 BIB 6 18 L023900400002 REACTION (90-TH-232(G,F),PR,NU) L023900400003 SAMPLE (90-TH-232,ENR=0.9998) Target was made of 5 identical L023900400004 disks with thickness of 2.00 mm and diameter 25.40mm. L023900400005 Total weight was (59.5+-0.1)g and thickness L023900400006 (10.00+-0.02) mm L023900400007 ANALYSIS The multiplicity and its spread were determined to L023900400008 minimize the chi-square between the measurement and L023900400009 the Monte Carlo simulation L023900400010 ERR-ANALYS (ERR-1) Upper error of mean multiplicity L023900400011 (ERR-2) Lower error of mean multiplicity L023900400012 (ERR-3) Upper error of multiplicity spread L023900400013 (ERR-4) Lower error of multiplicity spread L023900400014 All above uncertainties are from counting statistics L023900400015 and simulation. Uncertainties were adjustad to get L023900400016 chi-square=1 L023900400017 MISC-COL (MISC) Mean neutron multiplicity spread (sigma) L023900400018 STATUS (TABLE) Data presented in fig.12a,13a of the reference L023900400019 sent by author (J.A.S.) L023900400020 ENDBIB 18 0 L023900400021 NOCOMMON 0 0 L023900400022 DATA 8 7 L023900400023 EN EN-RSL DATA ERR-1 ERR-2 MISC L023900400024 ERR-3 ERR-4 L023900400025 MEV MEV PRT/FIS PRT/FIS PRT/FIS PRT/FIS L023900400026 PRT/FIS PRT/FIS L023900400027 5.25 0.079 1.69 0.13 0.03 1.4 L023900400028 0.03 0.04 L023900400029 5.4 0.081 1.95 0.05 0.15 1.25 L023900400030 0.05 0.05 L023900400031 5.5 0.083 2.14 0.02 0.14 1.34 L023900400032 0.05 0.02 L023900400033 5.55 0.083 2.34 0.08 0.07 1.18 L023900400034 0.04 0.03 L023900400035 5.6 0.084 2.45 0.05 0.1 1.15 L023900400036 0.05 0.05 L023900400037 5.65 0.085 2.16 0.07 0.02 1.28 L023900400038 0.02 0.04 L023900400039 5.7 0.086 2.36 0.03 0.04 1.12 L023900400040 0.02 0.02 L023900400041 ENDDATA 18 0 L023900400042 ENDSUBENT 41 0 L023900499999 SUBENT L0239005 20190317 L043L023900500001 BIB 6 18 L023900500002 REACTION (92-U-238(G,F),PR,NU) L023900500003 SAMPLE (92-U-238,ENR=0.99) Target was composed of 8 disks L023900500004 of depleted uranium with thickness from 0.51 to 0.81mm.L023900500005 Total weight was (53.67+-0.01)g and thickness L023900500006 (5.06+-0.03)mm. Sample enrichment is larger than 99%. L023900500007 ANALYSIS The multiplicity and its spread were determined to L023900500008 minimize the chi-square between the measurement and L023900500009 the Monte Carlo simulation L023900500010 ERR-ANALYS (ERR-1) Upper error of mean multiplicity L023900500011 (ERR-2) Lower error of mean multiplicity L023900500012 (ERR-3) Upper error of multiplicity spread L023900500013 (ERR-4) Lower error of multiplicity spread L023900500014 All above uncertainties are from counting statistics L023900500015 and simulation. Uncertainties were adjustad to get L023900500016 chi-square=1 L023900500017 MISC-COL (MISC) Mean neutron multiplicity spread (sigma) L023900500018 STATUS (TABLE) Data presented in fig.12b,13b of the reference L023900500019 sent by author (J.A.S.) L023900500020 ENDBIB 18 0 L023900500021 NOCOMMON 0 0 L023900500022 DATA 8 8 L023900500023 EN EN-RSL DATA ERR-1 ERR-2 MISC L023900500024 ERR-3 ERR-4 L023900500025 MEV MEV PRT/FIS PRT/FIS PRT/FIS PRT/FIS L023900500026 PRT/FIS PRT/FIS L023900500027 5.1 0.077 1.4 0.1 0.1 1.85 L023900500028 0.1 0.1 L023900500029 5.15 0.077 1.8 0.1 0.1 1.65 L023900500030 0.1 0.1 L023900500031 5.2 0.078 2.54 0.02 0.02 1.26 L023900500032 0.02 0.02 L023900500033 5.3 0.08 2.54 0.04 0.13 1.35 L023900500034 0.07 0.05 L023900500035 5.4 0.081 2.48 0.03 0.02 1.34 L023900500036 0.04 0.02 L023900500037 5.6 0.084 2.44 0.02 0.02 1.47 L023900500038 0.02 0.02 L023900500039 5.7 0.086 2.61 0.02 0.03 1.18 L023900500040 0.02 0.02 L023900500041 5.8 0.087 2.5 0.02 0.02 1.35 L023900500042 0.04 0.02 L023900500043 ENDDATA 20 0 L023900500044 ENDSUBENT 43 0 L023900599999 ENDENTRY 5 0 L023999999999