ENTRY L0172 20120523 L020L017200000001 SUBENT L0172001 20120523 L020L017200100001 BIB 14 38 L017200100002 TITLE Photofission Cross Sections of U235, U238, Th232, L017200100003 Bi209, and Au197 at Energies of 150 to 500 Mev L017200100004 AUTHOR (J.A.Jungerman,H.M.Steiner) L017200100005 INSTITUTE (1USADAV,1USABRK) L017200100006 REFERENCE (J,PR,106,(3),585,1957) L017200100007 #doi:10.1103/PhysRev.106.585 L017200100008 REL-REF (I,,H.M.Steiner+,J,PR,101,807,1956) Apparatus. L017200100009 (M,,H.M.Steiner+,J,PR,101,807,1956) Details of L017200100010 experimental method. L017200100011 FACILITY (SYNCH,1USABRK) L017200100012 (SYNCH,1USACAL) L017200100013 INC-SOURCE (BRST) L017200100014 SAMPLE 232Th and 197Au foils had thickness of 0.88 mg/cm2 and L017200100015 1.07 mg/cm2, respectively. All the targets used ranged L017200100016 in thickness from 0.6 to 1.1 mg/cm2. L017200100017 DETECTOR (FISCH) L017200100018 PART-DET (FF) L017200100019 METHOD The bremsstrahlung beam was generated in a 0.020-inch L017200100020 platinum target and passed into a thick-walled L017200100021 ionization chamber. The counting rate per L017200100022 microcoulomb collected was also measured versus the L017200100023 voltage on the collecting and cancellation electrodes, L017200100024 and a suitable plateau was found. The fissioning L017200100025 effect of photoneutrons was estimated by using the L017200100026 235U sample. L017200100027 ERR-ANALYS (ERR-S) Statistical error L017200100028 (ERR-SYS) In addition to statistical errors shown in L017200100029 graphs and tables 13% probable systematic error can be L017200100030 introduced. It consists of the following systematic L017200100031 errors: L017200100032 (ERR-1) 7% due to sample thickness. L017200100033 (ERR-2) 8% calibration for number of equivalent L017200100034 quanta. L017200100035 (ERR-3) 5% extrapolation to zero bias. L017200100036 (ERR-4) 2% determination of the beam energy. L017200100037 HISTORY (20120523C) BP L017200100038 FLAG (1.) Data obtained at the California Institute of L017200100039 Technology. L017200100040 ENDBIB 38 0 L017200100041 COMMON 5 3 L017200100042 ERR-SYS ERR-1 ERR-2 ERR-3 ERR-4 L017200100043 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT L017200100044 13. 7. 8. 5. 2. L017200100045 ENDCOMMON 3 0 L017200100046 ENDSUBENT 45 0 L017200199999 SUBENT L0172002 20120523 L020L017200200001 BIB 2 2 L017200200002 REACTION (92-U-238(G,F),,SIG,,BRA) L017200200003 STATUS (TABLE) Table I, page 587. L017200200004 ENDBIB 2 0 L017200200005 NOCOMMON 0 0 L017200200006 DATA 4 13 L017200200007 EN-MAX DATA ERR-S FLAG L017200200008 MEV MB MB NO-DIM L017200200009 143. 147. 4. L017200200010 180. 154. 3. L017200200011 208. 154. 4. L017200200012 244. 170. 5. L017200200013 250. 151. 3. L017200200014 285. 173. 5. L017200200015 291. 168. 5. L017200200016 300. 163. 2. L017200200017 335. 146. 2. 1. L017200200018 335. 181. 1. L017200200019 385. 151. 2. 1. L017200200020 431. 152. 3. 1. L017200200021 480. 159. 5. 1. L017200200022 ENDDATA 15 0 L017200200023 ENDSUBENT 22 0 L017200299999 SUBENT L0172003 20120523 L020L017200300001 BIB 2 2 L017200300002 REACTION (92-U-235(G,F),,SIG,,BRA) L017200300003 STATUS (TABLE) Table I, page 587. L017200300004 ENDBIB 2 0 L017200300005 NOCOMMON 0 0 L017200300006 DATA 4 13 L017200300007 EN-MAX DATA ERR-S FLAG L017200300008 MEV MB MB NO-DIM L017200300009 143. 226. 6. L017200300010 180. 238. 5. L017200300011 208. 244. 8. L017200300012 232. 239. 4. L017200300013 244. 270. 7. L017200300014 250. 239. 6. L017200300015 291. 276. 5. L017200300016 300. 244. 6. L017200300017 335. 235. 6. 1. L017200300018 335. 274. 1. L017200300019 431. 252. 7. 1. L017200300020 476. 257. 15. 1. L017200300021 500. 247. 10. 1. L017200300022 ENDDATA 15 0 L017200300023 ENDSUBENT 22 0 L017200399999 SUBENT L0172004 20120523 L020L017200400001 BIB 2 2 L017200400002 REACTION (90-TH-232(G,F),,SIG,,BRA) L017200400003 STATUS (TABLE) Table I, page 587. L017200400004 ENDBIB 2 0 L017200400005 NOCOMMON 0 0 L017200400006 DATA 4 17 L017200400007 EN-MAX DATA ERR-S FLAG L017200400008 MEV MB MB NO-DIM L017200400009 143. 43.3 1.4 L017200400010 180. 44.2 0.8 L017200400011 208. 42.8 1.2 L017200400012 244. 51.3 1.3 L017200400013 250. 50.2 1.4 L017200400014 285. 55.7 1.3 L017200400015 291. 61.2 1.8 L017200400016 300. 53.0 1.1 L017200400017 335. 50.5 1.1 1. L017200400018 335. 58.5 0.5 L017200400019 385. 51.0 1.1 1. L017200400020 389. 60.5 2.0 1. L017200400021 431. 57.8 1.2 1. L017200400022 471. 63.4 1.3 1. L017200400023 476. 63.9 1.5 1. L017200400024 480. 64.7 1.5 1. L017200400025 500. 65.8 2.0 1. L017200400026 ENDDATA 19 0 L017200400027 ENDSUBENT 26 0 L017200499999 SUBENT L0172005 20120523 L020L017200500001 BIB 2 2 L017200500002 REACTION (83-BI-209(G,F),,SIG,,BRA) L017200500003 STATUS (TABLE) Table I, page 587. L017200500004 ENDBIB 2 0 L017200500005 NOCOMMON 0 0 L017200500006 DATA 4 18 L017200500007 EN-MAX DATA ERR-S FLAG L017200500008 MEV MB MB NO-DIM L017200500009 150. 0.61 0.12 1. L017200500010 180. 0.68 0.09 L017200500011 200. 1.30 0.24 1. L017200500012 208. 1.18 0.28 L017200500013 250. 1.78 0.22 1. L017200500014 285. 2.26 0.18 1. L017200500015 285. 1.85 0.13 L017200500016 335. 3.12 0.13 1. L017200500017 335. 3.06 0.06 L017200500018 362. 4.00 0.09 1. L017200500019 385. 4.71 0.14 1. L017200500020 408. 5.09 0.17 1. L017200500021 431. 5.48 0.17 1. L017200500022 451. 6.10 0.18 1. L017200500023 466. 6.25 0.20 1. L017200500024 476. 6.16 0.20 1. L017200500025 480. 6.17 0.20 1. L017200500026 500. 6.82 0.14 1. L017200500027 ENDDATA 20 0 L017200500028 ENDSUBENT 27 0 L017200599999 SUBENT L0172006 20120523 L020L017200600001 BIB 2 2 L017200600002 REACTION (79-AU-197(G,F),,SIG,,BRA) L017200600003 STATUS (TABLE) Table I, page 587. L017200600004 ENDBIB 2 0 L017200600005 NOCOMMON 0 0 L017200600006 DATA 4 8 L017200600007 EN-MAX DATA ERR-S FLAG L017200600008 MEV MB MB NO-DIM L017200600009 200. 0.31 0.09 1. L017200600010 250. 0.33 0.07 1. L017200600011 285. 0.78 0.06 L017200600012 300. 0.72 0.08 L017200600013 350. 0.86 0.10 1. L017200600014 400. 1.23 0.11 1. L017200600015 451. 1.42 0.14 1. L017200600016 500. 1.57 0.09 1. L017200600017 ENDDATA 10 0 L017200600018 ENDSUBENT 17 0 L017200699999 ENDENTRY 6 0 L017299999999