ENTRY 32728 20161004 31763272800000001 SUBENT 32728001 20161004 31763272800100001 BIB 13 29 3272800100002 TITLE Nuclear emulsion measuring the prompt fission neutron 3272800100003 spectrum of 238U induced by 2.8 MeV neutrons 3272800100004 AUTHOR (Weiping Wen,Guangwu Li,Hongkai Wang) 3272800100005 INSTITUTE (3CPRAEP) 3272800100006 REFERENCE (J,ANE,94,576,2016) 3272800100007 #doi:10.1016/j.anucene.2016.03.017 3272800100008 FACILITY (VDG,3CPRAEP) 600 kV High Voltage Multiplier 3272800100009 SAMPLE The 238U sample is depleted uranium whose purity is 3272800100010 99.9% and size is 10x10x2 cm. The sample is placed at 3272800100011 the distance of 10 cm from the neutron source, and of 3272800100012 40 cm from the emulsions. The normal of the sample is 3272800100013 at 30 deg relative to the incident neutron beam and 3272800100014 60 deg to the emulsions. 3272800100015 DETECTOR (TRD) Totally six national nuclear emulsions N-4 are 3272800100016 used, which have the size of 3x4x0.04 cm. 3272800100017 METHOD The tracks in experiment have been recognized 3272800100018 manually with binocular microscope system. 3272800100019 INC-SOURCE (D-D) 3272800100020 ERR-ANALYS (ERR-S) Counting statistics 3272800100021 CORRECTION Measurements were corrected for the probability of 3272800100022 proton tracks and track confusion counting of 3272800100023 different energy ranges, different attenuation of the 3272800100024 neutron flux when neutrons with different energies 3272800100025 going through the emulsion, and the emulsion 3272800100026 shrinkage. No correction is required for background 3272800100027 neutrons because only the neutrons greater than 3 MeV 3272800100028 are considered. 3272800100029 STATUS (TABLE) Table 3 at page 579 in J,ANE,94,2016. 3272800100030 HISTORY (20161004C) Compiled by Chen Guochang (CNDC) 3272800100031 ENDBIB 29 0 3272800100032 NOCOMMON 0 0 3272800100033 ENDSUBENT 32 0 3272800199999 SUBENT 32728002 20161004 31763272800200001 BIB 2 2 3272800200002 REACTION (92-U-238(N,F),,NU/DE,,REL) 3272800200003 ASSUMED (ASSUM,1-H-1(N,EL)1-H-1,,SIG) 3272800200004 ENDBIB 2 0 3272800200005 COMMON 1 3 3272800200006 EN 3272800200007 MEV 3272800200008 2.8 3272800200009 ENDCOMMON 3 0 3272800200010 DATA 5 22 3272800200011 E-MIN E-MAX DATA ERR-S ASSUM 3272800200012 MEV MEV ARB-UNITS PER-CENT B 3272800200013 3. 3.5 1487.63 1.41 2.17 3272800200014 3.5 4. 1151.88 1.73 1.97 3272800200015 4. 4.5 844.62 2.19 1.80 3272800200016 4.5 5. 597.93 2.67 1.68 3272800200017 5. 5.5 416.73 3.30 1.56 3272800200018 5.5 6. 261.90 4.85 1.47 3272800200019 6. 6.5 165.11 5.99 1.37 3272800200020 6.5 7. 68.60 9.95 1.29 3272800200021 7. 7.5 58.53 10.48 1.22 3272800200022 7.5 8. 36.81 13.48 1.16 3272800200023 8. 8.5 19.77 18.57 1.10 3272800200024 8.5 9. 16.91 21.32 1.05 3272800200025 9. 9.5 8.53 28.87 1.00 3272800200026 9.5 10. 7.31 31.62 0.955 3272800200027 10. 10.5 4.54 44.72 0.914 3272800200028 10.5 11. 5.22 44.72 0.868 3272800200029 11. 11.5 3.19 50.00 0.843 3272800200030 11.5 12. 1.86 70.71 0.807 3272800200031 12. 12.5 1.54 70.71 0.775 3272800200032 12.5 13. 1.30 70.71 0.745 3272800200033 13. 13.5 0.76 100.00 0.723 3272800200034 13.5 14. 0.69 100.00 0.694 3272800200035 ENDDATA 24 0 3272800200036 ENDSUBENT 35 0 3272800299999 ENDENTRY 2 0 3272899999999