ENTRY 22707 20151008 22452270700000001 SUBENT 22707001 20151008 22452270700100001 BIB 11 25 2270700100002 TITLE Measurement of production cross sections of tritium 2270700100003 from oxygen using p-Be and p-Li neutrons up to En=38MeV2270700100004 AUTHOR (S.Shibata,T.Shibata,M.Imamura,T.Ohkubo,S.Satoh, 2270700100005 Y.Uwamino,N.Morikawa,N.Nogawa) 2270700100006 INSTITUTE (2JPNTOK,2JPNIPC) 2270700100007 REFERENCE (J,RCA,75,1,1996) 2270700100008 SAMPLE About 3 g of purified water used as the oxygen target 2270700100009 in a acrylic container of 2 cm in diam. X 1 cm was 2270700100010 irradiated with aluminum beam monitors by p-Be 2270700100011 neutrons at Ep=20-40 MeV in 2.5-MeV steps and by p-Li 2270700100012 ones in 5-MeV steps. 2270700100013 DETECTOR (SCIN) Liquid scintillation counter, PACKARD 2000CA/LL 2270700100014 FACILITY (CYCLO,2JPNTOK) The SF Cyclotron of the Institute for 2270700100015 Nuclear Study was used for the neutron irradiation. 2270700100016 METHOD (ACTIV) 2270700100017 (CHSEP) Extraction of tritium by distillation 2270700100018 CORRECTION Corrected for low energy neutrons 2270700100019 ERR-ANALYS (DATA-ERR) The errors refer to those from the neutron 2270700100020 flux determination, tritium-counting statistics and 2270700100021 efficiency, and distance between the Li and the water 2270700100022 target in the neutron irradiation. 2270700100023 HISTORY (20010402C) 2270700100024 (20151009A) SD: CORRECTION added, METHOD update in 2270700100025 Subent 001; REACTION code changed in Subents 002,003. 2270700100026 ERR-T -> DATA-ERR in Subents 002, 003. 2270700100027 ENDBIB 25 0 2270700100028 NOCOMMON 0 0 2270700100029 ENDSUBENT 28 0 2270700199999 SUBENT 22707002 20151008 22452270700200001 BIB 5 14 2270700200002 REACTION (8-O-16(N,X)1-H-3,,SIG,,AV) 2270700200003 INC-SOURCE (P-BE) Proton beams of energies at every 2.5 MeV 2270700200004 between 20 and 40 MeV were impinged to 1-mm-thick 2270700200005 (Ep=20 to 37.5MeV) and 2-mm-thick (Ep=40 MeV)Be 2270700200006 targets, which backed by a water coolant. The neutrons 2270700200007 produced in the forward direction by this target system2270700200008 were measured with a 51-mm-dia.x51-mm-long NE213 2270700200009 scintillator placed at about 1.1m from the target. 2270700200010 MONITOR (13-AL-27(N,A)11-NA-24,,DE) 2270700200011 STATUS (TABLE) Table 1 of Radiochim.Acta75(1996)1 2270700200012 (COREL,22707003) Data obtained with 7Li(p,n) 2270700200013 neutron source 2270700200014 HISTORY (20151009A) SD: SF3=T -> X, SF4=N-14 -> H-3 in REACTION2270700200015 code following A.Konobeev's remark. STATUS added. 2270700200016 ENDBIB 14 0 2270700200017 NOCOMMON 0 0 2270700200018 DATA 4 8 2270700200019 EN-MIN EN-MAX DATA DATA-ERR 2270700200020 MEV MEV MB MB 2270700200021 15. 21. 1.76 0.87 2270700200022 21. 24. 7.35 2.80 2270700200023 24. 26. 11.2 2.2 2270700200024 26. 29. 13.5 2.6 2270700200025 29. 31. 7.49 1.27 2270700200026 31. 34. 12.3 2.3 2270700200027 34. 36. 8.38 1.65 2270700200028 36. 39. 7.66 1.49 2270700200029 ENDDATA 10 0 2270700200030 ENDSUBENT 29 0 2270700299999 SUBENT 22707003 20151008 22452270700300001 BIB 4 19 2270700300002 REACTION (8-O-16(N,X)1-H-3,,SIG,,AV) 2270700300003 INC-SOURCE (P-LI7) The target system of the p-Li neutron field 2270700300004 comprised of a 2 mm thick Li (7Li 99.98% enriched) 2270700300005 target backing by a 12 mm thick carbon (graphite) 2270700300006 used as a beam stopper for primary protons. The lithium2270700300007 target was fixed in an aluminum target holder, which 2270700300008 enabled the target to slide up and down manually. This 2270700300009 made it possible to irradiate samples using two types 2270700300010 of target systems: one was a lithium-plus-carbon target2270700300011 the other was only carbon target. 2270700300012 The neutron spectra at 0 degr. were measured with TOF 2270700300013 method using a 127-mm-diam. x 127mm-long NE213 2270700300014 scintillator about 10 m away from the target. 2270700300015 STATUS (TABLE) Table 2 of Radiochim.Acta75(1996)1 2270700300016 (COREL,22707002) Data obtained with 9Be(p,n) neutron 2270700300017 source 2270700300018 HISTORY (20151009A) SD: SF3=T -> X, SF4=N-14 -> H-3, SF8=AV 2270700300019 added in REACTION code following A.Konobeev's remark. 2270700300020 STATUS added. STATUS was added. 2270700300021 ENDBIB 19 0 2270700300022 NOCOMMON 0 0 2270700300023 DATA 4 5 2270700300024 EN-MIN EN-MAX DATA DATA-ERR 2270700300025 MEV MEV MB MB 2270700300026 15.6 19.3 0.88 0.31 2270700300027 19.9 23.4 4.12 0.66 2270700300028 25.7 29.3 12.8 1.8 2270700300029 31.0 34.4 12.9 1.8 2270700300030 36.4 39.8 10.5 1.6 2270700300031 ENDDATA 7 0 2270700300032 ENDSUBENT 31 0 2270700399999 ENDENTRY 3 0 2270799999999