ENTRY 31620 20120405 31553162000000001 SUBENT 31620001 20120405 31553162000100001 BIB 12 51 3162000100002 TITLE Measurement of Differential Cross Section for the 3162000100003 64Zn(n,a) 61Ni Reaction at 2.54, 4.00, and 5.50 MeV 3162000100004 AUTHOR (Guohui Zhang, Jiaguo Zhang, Rongtai Cao, Lian Guo, 3162000100005 Jinxiang Chen, Yu.M.Gledenov, M.V.Sedysheva, 3162000100006 G.Khuukhenkhuu) 3162000100007 INSTITUTE (3CPRBJG,4ZZZDUB,3POLLOU) 3162000100008 REFERENCE (J,NSE,160,123,2008) 3162000100009 ((S,ISINN-18,143,2011)=(S,JINR-E3-2011-26,143,2011)) 3162000100010 Same (n,a) cross section given 3162000100011 ((S,ISINN-15,147,2008)=(S,JINR-E3-2008-26,147,2008)) 3162000100012 Preliminary results given 3162000100013 FACILITY (VDG,3CPRBJG) the 4.5-MV Van de Graaff accelerator 3162000100014 SAMPLE Two 64Zn samples (mass 4.05 +/- 0.05 mg and thickness 3162000100015 266.3 mg/cm2 each) attached back-to-back to the 3162000100016 common cathode were used for simultaneous alpha event 3162000100017 measurements of forward (0 to 90 deg) and backward 3162000100018 (90 to 180 deg) angles. 3162000100019 The isotopic abundance of the 64Zn samples was 99.4%. 3162000100020 Each sample was vacuumevaporated on a tantalum backing 3162000100021 4.8 cm in diameter and 50 mm in thickness. 3162000100022 DETECTOR (IOCH) Twin-gridded ionization chamber. 3162000100023 The shape of the electrodes of the chamber is square, 3162000100024 and the area is 19 x 19 cm2. 3162000100025 The cathode and the anode are aluminum boards coated 3162000100026 with tungsten layer. 3162000100027 The material of the grid wire is tungsten coated with 3162000100028 gold. 3162000100029 The diameter and the spacing of the grid wires are 0.1 3162000100030 and 2.0 mm, respectively. 3162000100031 The working gas of the ionization chamber was Kr + 3162000100032 2.68%CO2. 3162000100033 The pressures of the working gas were 0.90, 1.25, and 3162000100034 1.55 atm for the 2.54, 4.00, and 5.50 MeV 3162000100035 measurements, respectively. 3162000100036 (BF3) A BF3 long counter as a neutron flux monitor 3162000100037 MONITOR (92-U-238(N,F),,SIG) 3162000100038 The absolute neutron flux was determined by 3162000100039 measuring the fission rate with a 238U foil 3162000100040 (diam. 4.50 cm, mass 7.85 +/- 0.10 mg, and abundance 3162000100041 99.999%) placed at the third position of the sample 3162000100042 changer. 3162000100043 MONIT-REF (,,3,ENDF/B-VII.0,,2006) 3162000100044 ERR-ANALYS (ERR-1) atom number of the 64Zn sample 3162000100045 (ERR-2) atom number of the 238U sample 3162000100046 (ERR-3) fission counts (3.0 to 3.4%) 3162000100047 (MONIT-ERR) 238U fission cross section data 3162000100048 STATUS (TABLE) Tables 1-4 of Nucl.Sci.Eng.160(2008)123 3162000100049 (APRVD) Entry approved by Dr. Guohui Zhang 3162000100050 HISTORY (20080724C) SD 3162000100051 (20090305U) SD. reference on ISINN-15 was corrected. 3162000100052 (20120405U) On. REFERENCE: ISINN-18 added 3162000100053 ENDBIB 51 0 3162000100054 COMMON 4 3 3162000100055 ERR-1 ERR-2 ERR-3 MONIT-ERR 3162000100056 PER-CENT PER-CENT PER-CENT PER-CENT 3162000100057 1.23 1.27 3.4 1.0 3162000100058 ENDCOMMON 3 0 3162000100059 ENDSUBENT 58 0 3162000199999 SUBENT 31620002 20080718 31293162000200001 BIB 5 9 3162000200002 REACTION (30-ZN-64(N,A)28-NI-61,PAR,SIG) tbl. 4 3162000200003 ANALYSIS (INTAD) Angle-integrated cross sections are derived 3162000200004 from the differential data through the second-order 3162000200005 polynomial fitting. 3162000200006 EN-SEC (E-LVL-MIN,28-NI-61) 3162000200007 (E-LVL-MAX,28-NI-61) 3162000200008 ERR-ANALYS (ERR-T) Total error 3162000200009 STATUS (DEP,31620004) 3162000200010 (DEP,31620005) 3162000200011 ENDBIB 9 0 3162000200012 NOCOMMON 0 0 3162000200013 DATA 5 6 3162000200014 EN E-LVL-MIN E-LVL-MAX DATA ERR-T 3162000200015 MEV MEV MEV MB MB 3162000200016 2.54 0.0 0.283 9.1 0.9 3162000200017 2.54 0.656 2.7 1.4 3162000200018 4.00 0.0 0.283 41.5 3.3 3162000200019 4.00 0.656 18.1 1.4 3162000200020 5.50 0.0 0.283 31.0 2.5 3162000200021 5.50 0.656 39.5 3.1 3162000200022 ENDDATA 8 0 3162000200023 ENDSUBENT 22 0 3162000299999 SUBENT 31620003 20080718 31293162000300001 BIB 4 7 3162000300002 REACTION (30-ZN-64(N,A)28-NI-61,,SIG) tbl. 4 3162000300003 ANALYSIS (INTAD) Angle-integrated cross sections are derived 3162000300004 from the differential data through the second-order 3162000300005 polynomial fitting. 3162000300006 ERR-ANALYS (ERR-T) Total error 3162000300007 STATUS (DEP,31614004) 3162000300008 (DEP,31614005) 3162000300009 ENDBIB 7 0 3162000300010 NOCOMMON 0 0 3162000300011 DATA 3 3 3162000300012 EN DATA ERR-T 3162000300013 MEV MB MB 3162000300014 2.54 11.8 1.1 3162000300015 4.00 59.6 3.6 3162000300016 5.50 70.5 4.0 3162000300017 ENDDATA 5 0 3162000300018 ENDSUBENT 17 0 3162000399999 SUBENT 31620004 20080718 31293162000400001 BIB 4 16 3162000400002 REACTION (30-ZN-64(N,A)28-NI-61,PAR,DA) tbl.1 3162000400003 EN-SEC (E-LVL-MIN,28-NI-61) 3162000400004 (E-LVL-MAX,28-NI-61) 3162000400005 INC-SOURCE (P-T) A solid Ti-T target and a deuterium gas target 3162000400006 were used asneutron sources. The thickness of the 3162000400007 Ti-T target was 0.80 mg/cm2. Monoenergetic neutrons 3162000400008 were produced through the T(p,n)3He reaction with 3162000400009 the solid target. The energy of the accelerated 3162000400010 protons was 3.35 MeV. The corresponding neutron 3162000400011 energy was 2.54, and the energy spread was 0.03 MeV. 3162000400012 ERR-ANALYS (DATA-ERR) Uncertainties include those due to: 3162000400013 * the statistics of counts (3.3 to 5%), 3162000400014 * the uncertainty from background 3162000400015 subtraction (4 to 6%), 3162000400016 * the uncertainty of determination of 0 and 90 deg 3162000400017 lines (2 to 5%). 3162000400018 ENDBIB 16 0 3162000400019 COMMON 3 3 3162000400020 EN E-LVL-MIN E-LVL-MAX 3162000400021 MEV MEV MEV 3162000400022 2.54 0.0 0.283 3162000400023 ENDCOMMON 3 0 3162000400024 DATA 3 8 3162000400025 COS-CM DATA-CM DATA-ERR 3162000400026 NO-DIM MB/SR PER-CENT 3162000400027 -0.904 0.93 10.0 3162000400028 -0.710 0.79 9.0 3162000400029 -0.515 0.74 9.0 3162000400030 -0.318 0.58 9.0 3162000400031 0.282 0.66 9.0 3162000400032 0.485 0.72 9.0 3162000400033 0.690 0.77 9.0 3162000400034 0.896 0.83 10.0 3162000400035 ENDDATA 10 0 3162000400036 ENDSUBENT 35 0 3162000499999 SUBENT 31620005 20080718 31293162000500001 BIB 4 16 3162000500002 REACTION (30-ZN-64(N,A)28-NI-61,PAR,DA) tbl.2 3162000500003 EN-SEC (E-LVL-MIN,28-NI-61) 3162000500004 (E-LVL-MAX,28-NI-61) 3162000500005 INC-SOURCE (D-D) The deuterium gas target was also used to 3162000500006 produce neutrons through the D(d,n)3He reaction. The 3162000500007 length of the gas cell was 2.0 cm, and the deuterium 3162000500008 gas pressure was 2.65 to 2.80 atm. The cell was 3162000500009 separated from the vacuum tube by a 5-mu-m thick 3162000500010 molybdenum film. The energies of the accelerated 3162000500011 deuterons were 1.77 and 2.84 MeV. The corresponding 3162000500012 neutron energies were 4.00 and 5.50 MeV, and the 3162000500013 energy spreads were 0.21 and 0.13 MeV, respectively. 3162000500014 ERR-ANALYS (DATA-ERR) The errors in include: 3162000500015 * statistical errors (3.3 - 5%), 3162000500016 * background subtraction errors (4 - 6%), 3162000500017 * 90-deg line determination uncertainties (2 - 5%). 3162000500018 ENDBIB 16 0 3162000500019 COMMON 1 3 3162000500020 EN 3162000500021 MEV 3162000500022 4.0 3162000500023 ENDCOMMON 3 0 3162000500024 DATA 5 32 3162000500025 E-LVL-MIN E-LVL-MAX COS-CM DATA-CM DATA-ERR 3162000500026 MEV MEV NO-DIM MB/SR PER-CENT 3162000500027 0.000 0.283 -0.9520 4.32 8.0 3162000500028 0.000 0.283 -0.8560 4.04 6.5 3162000500029 0.000 0.283 -0.7600 3.83 6.5 3162000500030 0.000 0.283 -0.6630 3.78 6.5 3162000500031 0.000 0.283 -0.5660 3.09 6.5 3162000500032 0.000 0.283 -0.4680 2.97 6.5 3162000500033 0.000 0.283 -0.3700 2.98 6.5 3162000500034 0.000 0.283 -0.2710 2.85 6.5 3162000500035 0.000 0.283 0.2290 2.69 6.5 3162000500036 0.000 0.283 0.3300 2.91 6.5 3162000500037 0.000 0.283 0.4320 2.95 6.5 3162000500038 0.000 0.283 0.5340 3.19 6.5 3162000500039 0.000 0.283 0.6370 3.57 6.5 3162000500040 0.000 0.283 0.7400 3.86 6.5 3162000500041 0.000 0.283 0.8440 3.85 6.5 3162000500042 0.000 0.283 0.9480 4.31 8.0 3162000500043 0.656 -0.9520 1.58 10.0 3162000500044 0.656 -0.8570 1.56 9.0 3162000500045 0.656 -0.7600 1.52 9.0 3162000500046 0.656 -0.6640 1.55 9.0 3162000500047 0.656 -0.5670 1.45 9.0 3162000500048 0.656 -0.4690 1.43 9.0 3162000500049 0.656 -0.3710 1.41 9.0 3162000500050 0.656 -0.2730 1.44 9.0 3162000500051 0.656 0.2270 1.34 9.0 3162000500052 0.656 0.3290 1.42 9.0 3162000500053 0.656 0.4310 1.45 9.0 3162000500054 0.656 0.5330 1.47 9.0 3162000500055 0.656 0.6360 1.32 9.0 3162000500056 0.656 0.7390 1.46 9.0 3162000500057 0.656 0.8430 1.42 9.0 3162000500058 0.656 0.9480 1.46 10.0 3162000500059 ENDDATA 34 0 3162000500060 ENDSUBENT 59 0 3162000599999 SUBENT 31620006 20080718 31293162000600001 BIB 4 16 3162000600002 REACTION (30-ZN-64(N,A)28-NI-61,PAR,DA) tbl.3 3162000600003 EN-SEC (E-LVL-MIN,28-NI-61) 3162000600004 (E-LVL-MAX,28-NI-61) 3162000600005 INC-SOURCE (D-D) The deuterium gas target was also used to 3162000600006 produce neutrons through the D(d,n)3He reaction. The 3162000600007 length of the gas cell was 2.0 cm, and the deuterium 3162000600008 gas pressure was 2.65 to 2.80 atm. The cell was 3162000600009 separated from the vacuum tube by a 5-mm-thick 3162000600010 molybdenum film. The energies of the accelerated 3162000600011 deuterons were 1.77 and 2.84 MeV. The corresponding 3162000600012 neutron energies were 4.00 and 5.50 MeV, and the 3162000600013 energy spreads were 0.21 and 0.13 MeV, respectively. 3162000600014 ERR-ANALYS (DATA-ERR) The errors in include: 3162000600015 * statistical errors (3.3 - 5%), 3162000600016 * background subtraction errors (4 - 6%), 3162000600017 * 90-deg line determination uncertainties (2 - 5%). 3162000600018 ENDBIB 16 0 3162000600019 COMMON 1 3 3162000600020 EN 3162000600021 MEV 3162000600022 5.50 3162000600023 ENDCOMMON 3 0 3162000600024 DATA 5 32 3162000600025 E-LVL-MIN E-LVL-MAX COS-CM DATA-CM DATA-ERR 3162000600026 MEV MEV NO-DIM MB/SR PER-CENT 3162000600027 0.000 0.283 -0.952 2.82 8.0 3162000600028 0.000 0.283 -0.857 2.52 6.5 3162000600029 0.000 0.283 -0.761 2.38 6.5 3162000600030 0.000 0.283 -0.664 2.44 6.5 3162000600031 0.000 0.283 -0.567 2.28 6.5 3162000600032 0.000 0.283 -0.469 2.38 6.5 3162000600033 0.000 0.283 -0.371 1.98 7.0 3162000600034 0.000 0.283 -0.273 1.96 7.0 3162000600035 0.000 0.283 0.227 2.10 7.2 3162000600036 0.000 0.283 0.328 2.22 7.0 3162000600037 0.000 0.283 0.430 2.37 7.0 3162000600038 0.000 0.283 0.533 2.87 6.5 3162000600039 0.000 0.283 0.636 3.07 6.5 3162000600040 0.000 0.283 0.739 3.04 6.5 3162000600041 0.000 0.283 0.843 3.36 6.5 3162000600042 0.000 0.283 0.948 3.41 8.0 3162000600043 0.656 -0.952 3.16 8.0 3162000600044 0.656 -0.857 3.21 6.5 3162000600045 0.656 -0.761 3.16 6.5 3162000600046 0.656 -0.665 3.24 6.5 3162000600047 0.656 -0.568 3.36 6.5 3162000600048 0.656 -0.470 3.16 6.5 3162000600049 0.656 -0.372 3.13 6.5 3162000600050 0.656 -0.274 2.99 6.5 3162000600051 0.656 0.226 3.02 6.5 3162000600052 0.656 0.327 3.13 6.5 3162000600053 0.656 0.429 2.94 6.5 3162000600054 0.656 0.532 3.33 6.5 3162000600055 0.656 0.635 3.06 6.5 3162000600056 0.656 0.739 3.34 6.5 3162000600057 0.656 0.843 3.30 6.5 3162000600058 0.656 0.947 3.15 8.5 3162000600059 ENDDATA 34 0 3162000600060 ENDSUBENT 59 0 3162000699999 ENDENTRY 6 0 3162099999999