ENTRY 14172 20160804 14211417200000001 SUBENT 14172001 20160804 14211417200100001 BIB 13 47 1417200100002 TITLE Measurement of the 241Am(n,2n) reaction cross 1417200100003 section from 7.6 MeV to 14.5 MeV 1417200100004 AUTHOR (A.P.Tonchev, C.T.Angell, M.Boswell, A.S.Crowell, 1417200100005 B.Fallin, S.Hammond, C.R.Howell, A.Hutcheson, 1417200100006 H.J.Karwowski, J.H.Kelley, R.S.Pedroni, W.Tornow, 1417200100007 J.A.Becker, D.Dashdorj, J.Kenneally, R.A.Macri, 1417200100008 M.A.Stoyer, C.Y.Wu, E.Bond, M.B.Chadwick, 1417200100009 J.Fitzpatrick, T.Kawano, R.S.Rundberg, A.Slemmons, 1417200100010 D.J.Vieira, J.B.Wilhelmy) 1417200100011 INSTITUTE (1USADKE,1USANCA,1USANCS,1USALRL,1USALAS) 1417200100012 REFERENCE (J,PR/C,77,054610,2008) 1417200100013 (C,2007NICE,1,551,2007) Prelim. data given in figure 1417200100014 FACILITY (VDGT,1USATNL) 1417200100015 INC-SOURCE (D-D) 1417200100016 SAMPLE Highly enriched 241Am targets with enrichment of 99.9% 1417200100017 241Am were produced as a dry nitrate were, 1417200100018 1 cm-diameter layer of 241Am was electroplated from 1417200100019 an isopropanol/dilute nitric acid solution on a 1417200100020 12.7 um-thick Pt foil. 1417200100021 Total thickness of 241Am layer was about 1000 ug/cm2, 1417200100022 mass of 241Am 800-1000 ug and activity around 3 mCi. 1417200100023 Target was placed in thin aluminum container sealed 1417200100024 with 2 cm-diameter Havar windows. 1417200100025 DETECTOR (HPGE) Three 60% HPGe detectors were used 1417200100026 METHOD (ACTIV) 1417200100027 DECAY-DATA (95-AM-240,50.8HR,DG,987.76,0.722) 1417200100028 (95-AM-241,432.6YR) 1417200100029 ERR-ANALYS (ERR-S) Statistical uncertainty. 1417200100030 Total relative uncertainties include: 1417200100031 - count rate (statistics and background) (2-4%) 1417200100032 - gamma ray absorption in sample (<1%) 1417200100033 - sample mass (2%) 1417200100034 (ERR-1) gamma ray emission probability (1%) 1417200100035 (ERR-2) low energy neutrons (3%) 1417200100036 (ERR-3,,1.) half-life (<1%) 1417200100037 (ERR-4,,2.) coincidence summing (<2%) 1417200100038 (ERR-5,,1.) neutron flux fluctuations (<1%) 1417200100039 (ERR-6,2.,4.) detector efficiency (2-4%) 1417200100040 (MONIT-ERR,2.,3.) monitor cross section (2-3%) 1417200100041 CRITIQUE The correction factor introduced in Eq.(3) of 1417200100042 Phys.Rev.C77,054610,2008 must be inverted 1417200100043 (B.Lalremruata, 2015-04-30). 1417200100044 HISTORY (20080602C) Compiled by S.H. 1417200100045 (20081021A) BIB corrections. 1417200100046 (20120605U) On. REFERENCE: 2007NICE added 1417200100047 (20120731A) On. ERR-ANALYS and COMMON updated 1417200100048 (20160731A) OS. CRITIQUE added. 1417200100049 ENDBIB 47 0 1417200100050 COMMON 2 3 1417200100051 ERR-1 ERR-2 1417200100052 PER-CENT PER-CENT 1417200100053 1. 3. 1417200100054 ENDCOMMON 3 0 1417200100055 ENDSUBENT 54 0 1417200199999 SUBENT 14172002 20081021 13501417200200001 BIB 4 7 1417200200002 REACTION 1(95-AM-241(N,2N)95-AM-240,,SIG) 1417200200003 2(95-AM-241(N,2N)95-AM-240,,SIG) 1417200200004 MONITOR 1(13-AL-27(N,A)11-NA-24,,SIG) 1417200200005 2(79-AU-197(N,2N)79-AU-196,,SIG) 1417200200006 DECAY-MON 1(11-NA-24,14.9590HR,DG,1368.630,1.00) 1417200200007 2(79-AU-196,148.392HR,DG,355.73,0.8700) 1417200200008 STATUS (TABLE) Data taken from table 3 of the reference 1417200200009 ENDBIB 7 0 1417200200010 NOCOMMON 0 0 1417200200011 DATA 8 11 1417200200012 EN EN-RSL DATA 1ERR-S 1DATA 2ERR-S 21417200200013 MONIT 1MONIT 2 1417200200014 MEV MEV MB MB MB MB 1417200200015 MB MB 1417200200016 7.59 0.15 34.0 2.0 1417200200017 29.0 1417200200018 8.18 0.13 100.0 5.0 102.0 10. 1417200200019 46.0 3.0 1417200200020 8.68 0.20 129.0 10.0 117.0 5. 1417200200021 63.0 120.0 1417200200022 9.48 0.11 174.0 5.0 169.0 5. 1417200200023 82.0 706.0 1417200200024 10.78 0.09 229.0 8.0 228.0 7. 1417200200025 103.0 1558.0 1417200200026 11.30 0.14 259.0 13.0 240.0 12. 1417200200027 112.0 1602.0 1417200200028 12.17 0.08 260.0 9.0 1417200200029 119.0 1417200200030 12.97 0.07 264.0 9.0 254.0 9. 1417200200031 124.0 2107.0 1417200200032 13.46 0.07 253.0 9.0 250.0 8. 1417200200033 124.0 2050.0 1417200200034 13.91 0.11 244.0 11.0 247.0 11. 1417200200035 120.0 2117.0 1417200200036 14.46 0.07 243.0 7.0 1417200200037 113.0 1417200200038 ENDDATA 26 0 1417200200039 ENDSUBENT 38 0 1417200299999 SUBENT 14172003 20081021 13501417200300001 BIB 2 3 1417200300002 REACTION (95-AM-241(N,2N)95-AM-240,,SIG,,,DERIV) 1417200300003 STATUS (TABLE) Data taken from table 3 of the reference 1417200300004 (DEP,14172002) Average of values obtained by 2 monitors1417200300005 ENDBIB 3 0 1417200300006 NOCOMMON 0 0 1417200300007 DATA 4 11 1417200300008 EN EN-RSL DATA ERR-S 1417200300009 MEV MEV MB MB 1417200300010 7.59 0.15 34.0 2.0 1417200300011 8.18 0.13 100.0 5.0 1417200300012 8.68 0.20 120.0 4.0 1417200300013 9.48 0.11 172.0 4.0 1417200300014 10.78 0.09 228.0 5.0 1417200300015 11.30 0.14 249.0 9.0 1417200300016 12.17 0.08 260.0 9.0 1417200300017 12.97 0.07 259.0 6.0 1417200300018 13.46 0.07 251.0 6.0 1417200300019 13.91 0.11 246.0 8.0 1417200300020 14.46 0.07 243.0 7.0 1417200300021 ENDDATA 13 0 1417200300022 ENDSUBENT 21 0 1417200399999 ENDENTRY 3 0 1417299999999