ENTRY 32834 20230922 3283400000001 SUBENT 32834001 20230922 20240316 3283400100001 BIB 8 20 3283400100002 TITLE Absolute measurement of average numbers of prompt 3283400100003 neutrons for spontaneous fission of plutonium-240 3283400100004 AUTHOR (China Institute Of Atomic Energy) 3283400100005 INSTITUTE (3CPRAEP) 3283400100006 REFERENCE (J,CST,9,285,1975) 3283400100007 DETECTOR (STANK) Spherical cadmium loaded liquid scintillator 3283400100008 for detection of fission neutrons. The detection 3283400100009 efficiency was 0.5396 +- 0.0065, measured based on 3283400100010 the (n,p) scattering of monoenergetic neutron on 3283400100011 stilbene crystal. 3283400100012 (IOCH) Ionization chamber for detection of 3283400100013 spontaneous fissions 3283400100014 CORRECTION False fission and pulse overlap 3283400100015 ERR-ANALYS (ERR-T) The total uncertainty, 1.57% 3283400100016 (ERR-S) The statistical uncertainty, 0.83% 3283400100017 (ERR-1,,0.1) False fission, <0.1% 3283400100018 (ERR-2) Pulse overlap, 0.18% 3283400100019 (ERR-3) Detection efficiency, 1.22% 3283400100020 (ERR-4,,0.5) Others, <0.5% 3283400100021 HISTORY (20230922C) Jimin Wang (CNDC) 3283400100022 ENDBIB 20 0 3283400100023 COMMON 3 3 3283400100024 ERR-S ERR-2 ERR-3 3283400100025 PER-CENT PER-CENT PER-CENT 3283400100026 0.83 0.18 1.22 3283400100027 ENDCOMMON 3 0 3283400100028 ENDSUBENT 27 0 3283400199999 SUBENT 32834002 20230922 20240316 3283400200001 BIB 2 2 3283400200002 REACTION (94-PU-240(0,F),PR,NU) 3283400200003 STATUS (TABLE) Table 1 of At.En.Sci.Technol.9,285,1975 3283400200004 ENDBIB 2 0 3283400200005 NOCOMMON 0 0 3283400200006 DATA 2 1 3283400200007 DATA ERR-T 3283400200008 PRT/FIS PRT/FIS 3283400200009 2.138 0.034 3283400200010 ENDDATA 3 0 3283400200011 ENDSUBENT 10 0 3283400299999 ENDENTRY 2 0 3283499999999