ENTRY L0224 20171018 L034L022400000001 SUBENT L0224001 20171018 L034L022400100001 BIB 9 37 L022400100002 TITLE Measurement of the energy and multiplicity L022400100003 distributions of neutrons from the photofission L022400100004 of 235U L022400100005 AUTHOR (S.D.Clarke,B.M.Wieger,A.Enqvist,R.Vogt,J.Randrup, L022400100006 R.C.Haight,H.Y.Lee,B.A.Perdue,E.Kwan,C.Y.Wu, L022400100007 R.A.Henderson,S.A.Pozzi) L022400100008 INSTITUTE (1USAMHG,1USAFLA,1USALRL,1USADAV,1USABRK,1USALAS, L022400100009 1USAMSU) L022400100010 REFERENCE (J,PR/C,95,064612,2017) L022400100011 FACILITY (LINAC,1USALAS) Measurement performed at the L022400100012 Los Alamos Neutron Science Center at the WNR-15L L022400100013 beam line at LANSCE where an 800-MeV pulsed proton beamL022400100014 impacts on spallation target. L022400100015 SAMPLE (92-U-235,ENR=0.9991) 112 mg of enriched 235U depositedL022400100016 on both sides of ten plates in parallel-plate avalancheL022400100017 chamber.The diameter of each 235U deposit was 4 cm, L022400100018 resulting in an area of approximately 12.6 cm2 on each L022400100019 plate. The plates are separated by approximately 1 cm. L022400100020 INC-SOURCE (SPALL) A white photon source created by the high- L022400100021 energy spallation photons arriving ahead of the neutronL022400100022 beam at the Los Alamos Neutron Science Center (LANSCE) L022400100023 was used as photon source. L022400100024 DETECTOR (PPAC) Parallel-plate avalanche chamber containing 10 L022400100025 plates with deposited target 235U was used for fission L022400100026 fragments detection L022400100027 (SCIN) Array of 16 organic liquid scintillation L022400100028 detectors (EJ309) was used. Each detector was 7.62 cm L022400100029 in diameter and 5.08-cm thick. The detectors were L022400100030 placed approximately 22 cm away from the center of the L022400100031 fission chamber, arranged on two rings, each holding L022400100032 eight detectors with a total azimuthal angular coverageL022400100033 of approximately 270deg. A detection threshold of L022400100034 40 keVee (approximately 0.5 MeV of deposited proton- L022400100035 recoil energy) was applied. L022400100036 A Cf252 source was used for detector efficiency L022400100037 calibration. L022400100038 HISTORY (20171003C) Compiled by S.H. L022400100039 ENDBIB 37 0 L022400100040 NOCOMMON 0 0 L022400100041 ENDSUBENT 40 0 L022400199999 SUBENT L0224002 20171018 L034L022400200001 BIB 3 4 L022400200002 REACTION (92-U-235(G,F),PR,NU/DE,,REL) L022400200003 STATUS (TABLE) Data presented in fig.4 of the reference L022400200004 sent by author (S.D.C.) L022400200005 ERR-ANALYS (ERR-S) Statistical uncertainties (1 sigma) L022400200006 ENDBIB 4 0 L022400200007 COMMON 1 3 L022400200008 EN-DUMMY L022400200009 MEV L022400200010 12.0 L022400200011 ENDCOMMON 3 0 L022400200012 DATA 3 67 L022400200013 E DATA ERR-S L022400200014 MEV ARB-UNITS ARB-UNITS L022400200015 0.9 0.375300 0.0294 L022400200016 1.0 0.377200 0.0279 L022400200017 1.1 0.350100 0.0267 L022400200018 1.2 0.302000 0.0258 L022400200019 1.3 0.316800 0.0252 L022400200020 1.4 0.298600 0.025 L022400200021 1.5 0.287100 0.0248 L022400200022 1.6 0.299600 0.0247 L022400200023 1.7 0.245800 0.0246 L022400200024 1.8 0.227300 0.0246 L022400200025 1.9 0.224300 0.0247 L022400200026 2.0 0.215900 0.0249 L022400200027 2.1 0.203600 0.0251 L022400200028 2.2 0.196100 0.0253 L022400200029 2.3 0.175400 0.0256 L022400200030 2.4 0.182800 0.0259 L022400200031 2.5 0.166300 0.0262 L022400200032 2.6 0.167700 0.0266 L022400200033 2.7 0.149200 0.027 L022400200034 2.8 0.151300 0.0275 L022400200035 2.9 0.132600 0.028 L022400200036 3.0 0.135100 0.0286 L022400200037 3.1 0.123800 0.0291 L022400200038 3.2 0.128200 0.0297 L022400200039 3.3 0.126200 0.0303 L022400200040 3.4 0.096730 0.031 L022400200041 3.5 0.113500 0.0316 L022400200042 3.6 0.114400 0.0323 L022400200043 3.7 0.094390 0.033 L022400200044 3.8 0.095430 0.0336 L022400200045 3.9 0.077660 0.0344 L022400200046 4.0 0.091090 0.0351 L022400200047 4.1 0.077040 0.0358 L022400200048 4.2 0.073680 0.0365 L022400200049 4.3 0.066070 0.0373 L022400200050 4.4 0.063280 0.038 L022400200051 4.5 0.055210 0.0388 L022400200052 4.6 0.061250 0.0396 L022400200053 4.7 0.056500 0.0404 L022400200054 4.8 0.042630 0.0412 L022400200055 4.9 0.053990 0.042 L022400200056 5.0 0.050520 0.0428 L022400200057 5.1 0.040850 0.0437 L022400200058 5.2 0.046030 0.0445 L022400200059 5.3 0.041510 0.0454 L022400200060 5.4 0.039390 0.0463 L022400200061 5.5 0.039630 0.0472 L022400200062 5.6 0.025480 0.0481 L022400200063 5.7 0.028660 0.049 L022400200064 5.8 0.035000 0.0499 L022400200065 5.9 0.026340 0.0508 L022400200066 6.0 0.027530 0.0517 L022400200067 6.1 0.022290 0.0527 L022400200068 6.2 0.027180 0.0536 L022400200069 6.3 0.020310 0.0545 L022400200070 6.4 0.021180 0.0554 L022400200071 6.5 0.026330 0.0563 L022400200072 6.6 0.026880 0.0572 L022400200073 6.7 0.023260 0.0581 L022400200074 6.8 0.020810 0.059 L022400200075 6.9 0.015620 0.0599 L022400200076 7.0 0.013950 0.0608 L022400200077 7.1 0.014390 0.0617 L022400200078 7.2 0.012940 0.0625 L022400200079 7.3 0.016650 0.0633 L022400200080 7.4 0.017480 0.0642 L022400200081 7.5 0.009637 0.065 L022400200082 ENDDATA 69 0 L022400200083 ENDSUBENT 82 0 L022400299999 ENDENTRY 2 0 L022499999999