ENTRY 22481 20151109 22422248100000001 SUBENT 22481001 20151109 22422248100100001 BIB 12 36 2248100100002 TITLE Measurement of prompt fission neutron spectrum of 2248100100003 neptunium-237 for 0.62 MeV incident neutrons 2248100100004 AUTHOR (Than Win, M.Baba, M.Ibaraki, T.Miura, T.Sanami, 2248100100005 T.Iwasaki, N.Hirakawa) 2248100100006 INSTITUTE (2JPNTOH) 2248100100007 REFERENCE (J,NST,36,486,1999) 2248100100008 (T,WIN,1994) Than Win's thesis (for PFNS digitization) 2248100100009 FACILITY (DYNAM,2JPNTOH) 4.5 MV Dynamitron 2248100100010 INC-SOURCE (P-LI7) ~70 keV thick elemental Li evaporated on 2248100100011 to 0.25 mm thick Pt irradiated by about 2 to 3 uA 2248100100012 proton beam for about 40 hrs 2248100100013 SAMPLE NpO2 (19.99 g in Np, purity of 99.2%, enriched 2248100100014 by 237Np to 100%) in cylindrical-shaped two-layered 2248100100015 stainless steel container (13.8 mm diam and 120 mm 2248100100016 long for outer layer and 10.9 mm diam and 107 mm 2248100100017 long for inner layer) placed 8 cm from the 7Li 2248100100018 neutron production target. 2248100100019 DETECTOR (SCIN) NE213 (14 cm diam. x 10 cm thick) shielded by 2248100100020 paraffin containing Li2CO3 placed 90 deg to the 2248100100021 proton beam. 2248100100022 (SCIN) NE213 (5.08 cm diam. x 5.08 cm thick) as the 2248100100023 primary monitor detector. 2248100100024 METHOD (TOF) flight path of 2.45 m. Energy resolution is 2248100100025 about 0.46 MeV at 5 MeV and 1.05 MeV at 10 MeV (FWHM).2248100100026 (PSD) Pulse-shape discrimination for gamma-ray 2248100100027 rejection 2248100100028 CORRECTION Corrected for 2248100100029 - backgrounds 2248100100030 - detector efficiency 2248100100031 - neutron attenuation by lead slab 2248100100032 - spectrum distortion due to container 2248100100033 - multiple scattering inside the sample 2248100100034 ERR-ANALYS (DATA-ERR) No information on source of uncertainties 2248100100035 HISTORY (20001010C) Compiled by S.M. 2248100100036 (20001010U) Last checking has been done. 2248100100037 (20151109A) On. Recompiled. 2248100100038 ENDBIB 36 0 2248100100039 COMMON 2 3 2248100100040 EN EN-RSL 2248100100041 MEV KEV 2248100100042 0.62 60. 2248100100043 ENDCOMMON 3 0 2248100100044 ENDSUBENT 43 0 2248100199999 SUBENT 22481002 20151109 22422248100200001 BIB 3 3 2248100200002 REACTION (93-NP-237(N,F)0-NN-1,PR,KEM) 2248100200003 STATUS (TABLE) Table 2 of J.Nucl.Sci.Technol.36(1999)486 2248100200004 HISTORY (20151109A) On. REACTION corrected. 2248100200005 ENDBIB 3 0 2248100200006 NOCOMMON 0 0 2248100200007 DATA 2 1 2248100200008 DATA DATA-ERR 2248100200009 MEV MEV 2248100200010 1.28 0.04 2248100200011 ENDDATA 3 0 2248100200012 ENDSUBENT 11 0 2248100299999 SUBENT 22481003 20151109 22422248100300001 BIB 4 4 2248100300002 REACTION (93-NP-237(N,F)0-NN-1,PR,KE) 2248100300003 ANALYSIS Through Maxwellian fitting 2248100300004 STATUS (TABLE) Table 2 of J.Nucl.Sci.Technol.36(1999)486 2248100300005 HISTORY (20151109A) On. REACTION corrected. Values revised. 2248100300006 ENDBIB 4 0 2248100300007 NOCOMMON 0 0 2248100300008 DATA 2 1 2248100300009 DATA DATA-ERR 2248100300010 MEV MEV 2248100300011 1.93 0.06 2248100300012 ENDDATA 3 0 2248100300013 ENDSUBENT 12 0 2248100399999 SUBENT 22481004 20151109 22422248100400001 BIB 3 4 2248100400002 REACTION (93-NP-237(N,F),PR,NU/DE,,REL) 2248100400003 STATUS (TABLE) Tohoku Internal Library NP237.FIS (1999-07-22) 2248100400004 HISTORY (20151018R) On. Data received from Masanobu Ibaraki. 2248100400005 (20151109C) On 2248100400006 ENDBIB 4 0 2248100400007 NOCOMMON 0 0 2248100400008 DATA 4 27 2248100400009 E-MIN E-MAX DATA DATA-ERR 2248100400010 MEV MEV ARB-UNITS ARB-UNITS 2248100400011 0.8 1.0 3.1479E-05 1.2111E-06 2248100400012 1.0 1.2 3.2197E-05 6.8954E-07 2248100400013 1.2 1.4 2.9978E-05 5.1176E-07 2248100400014 1.4 1.6 3.0084E-05 4.5991E-07 2248100400015 1.6 1.8 2.7177E-05 4.1655E-07 2248100400016 1.8 2.0 2.4182E-05 3.7040E-07 2248100400017 2.0 2.2 2.1500E-05 3.4984E-07 2248100400018 2.2 2.4 2.0611E-05 3.4887E-07 2248100400019 2.4 2.6 1.7877E-05 3.3052E-07 2248100400020 2.6 2.8 1.5373E-05 3.1045E-07 2248100400021 2.8 3.0 1.3499E-05 2.9462E-07 2248100400022 3.0 3.2 1.2489E-05 2.8940E-07 2248100400023 3.2 3.4 1.1003E-05 2.8317E-07 2248100400024 3.4 3.6 9.4404E-06 2.6386E-07 2248100400025 3.6 3.8 8.3941E-06 2.5731E-07 2248100400026 3.8 4.0 7.4718E-06 2.5032E-07 2248100400027 4.0 4.8 5.6578E-06 1.1614E-07 2248100400028 4.8 5.6 3.1914E-06 1.0089E-07 2248100400029 5.6 6.4 1.6550E-06 8.7566E-08 2248100400030 6.4 7.2 1.0709E-06 3.3958E-08 2248100400031 7.2 8.0 5.6808E-07 2.7284E-08 2248100400032 8.0 8.8 3.0945E-07 2.2061E-08 2248100400033 8.8 9.6 1.8525E-07 1.9398E-08 2248100400034 9.6 10.4 9.2412E-08 1.6207E-08 2248100400035 10.4 11.2 4.5177E-08 1.3920E-08 2248100400036 11.2 12.0 2.1292E-08 1.2533E-08 2248100400037 12.0 12.8 2.7521E-08 1.3178E-08 2248100400038 ENDDATA 29 0 2248100400039 ENDSUBENT 38 0 2248100499999 ENDENTRY 4 0 2248199999999