ENTRY 22936 20170210 22582293600000001 SUBENT 22936001 20170210 22582293600100001 BIB 12 32 2293600100002 TITLE Measurement of the 241Am(n,2n) reaction cross section 2293600100003 using the activation method 2293600100004 AUTHOR (G.Perdikakis, C.T.Papadopoulos, R.Vlastou, 2293600100005 A.Lagoyannis, A.Spyrou, M.Kokkoris, S.Galanopoulos, 2293600100006 N.Patronis, D.Karamanis, Ch.Zarkadas, G.Kalyva, 2293600100007 S.Kossionides) 2293600100008 INSTITUTE (2GRCTUA,2GRCATH,2GRCIOA) 2293600100009 REFERENCE (J,PR/C,73,067601,2006) Final data given 2293600100010 (J,JRN,272,223,2007) Four similar data points tabulated2293600100011 FACILITY (VDGT,2GRCATH) 5.5 MV tandem accelerator 2293600100012 INC-SOURCE (D-D) Deuterium gas (1000 to 1800 mbar) in a stainless 2293600100013 steel gas cell (1 cm diam., 3.7 cm length, 5-um-thick 2293600100014 Mo window) 2293600100015 METHOD (ACTIV) Irradiated by 3 to 6 uA deuteron beam for 2293600100016 ~100 h for each run 2293600100017 SAMPLE 37 GBq 241AmO2 (containing ~100 uCi 154Eu) encapsulated2293600100018 in stainless steel and placed inside a Pb cylindrical 2293600100019 box (3-mm-thick wall). 2293600100020 The samples were placed at 0 deg and at 9 cm away from 2293600100021 the centre of the cell. 2293600100022 DETECTOR (HPGE) 56% HPGe detector calibrated by a 152Eu source 2293600100023 (BF3) Neutron monitor at 0 deg and at 2 m away from 2293600100024 the gas cell 2293600100025 CORRECTION Coincidence summing effects are negligible because of 2293600100026 the sample-detector distance longer than 15 cm. 2293600100027 Corrected for self absorption and counting geometry. 2293600100028 STATUS (APRVD) Approved by Rosa Vlastou (2017-02-27) 2293600100029 HISTORY (20061116C) S.M. 2293600100030 (20061216U) Last corrections have been done. 2293600100031 (20070731A) M.M. 2nd Reference was added. 2293600100032 (20120120A) NDS(VZ): REL-REF: ND/B->NDS 2293600100033 (20170210A) On. Major revisions in 003. 2293600100034 ENDBIB 32 0 2293600100035 NOCOMMON 0 0 2293600100036 ENDSUBENT 35 0 2293600199999 SUBENT 22936002 20170210 22582293600200001 BIB 9 24 2293600200002 REACTION 1(95-AM-241(N,2N)95-AM-240,,SIG) 2293600200003 2(95-AM-241(N,2N)95-AM-240,,SIG) 2293600200004 DECAY-DATA (95-AM-240,50.8HR,DG,987.8,0.74) 2293600200005 MONITOR (13-AL-27(N,A)11-NA-24,,SIG) 2293600200006 MONIT-REF (,,3,IRDF-2002,,2002) 2293600200007 ERR-ANALYS (ERR-T) Total uncertainty 2293600200008 (MONIT-ERR,1.,2.) Standard cross section values (1-2%) 2293600200009 (ERR-S,1.,14.) Counting statistics (1-14%) 2293600200010 (ERR-1,0.2,3.) Decay data (0.2-3%) 2293600200011 (ERR-2) Simulation of irradiation condition (5%) 2293600200012 (ERR-3) Sample weight (1%) 2293600200013 (ERR-4) Neutron fluence (3%) 2293600200014 (ERR-5,1.,2.) Neutron energy determination (1-2%) 2293600200015 (ERR-6) Detector efficiency (5%) 2293600200016 STATUS (TABLE) Table I of Phys.Rev.C73(2006)067601 2293600200017 2(SPSDD) by Rosa Vlastou (2017-02-03) 2293600200018 CRITIQUE 2By A.Kalamara et al. (2016): 2293600200019 Neutron induced reaction on contaminants of the target 2293600200020 could be open and produced a gamma-ray which 2293600200021 interfered with the 987.8 keV gamma line above 10 MeV.2293600200022 REL-REF 2(C,23289001,A.Kalamara+,J,PR/C,93,014610,2016) 2293600200023 HISTORY (20070731A) M.M. EN-ERR was added in according to data 2293600200024 of Table 1 2nd Reference. 2293600200025 (20170210A) On. 3 data points superseded. 2293600200026 ENDBIB 24 0 2293600200027 COMMON 5 3 2293600200028 EN-RSL ERR-2 ERR-3 ERR-4 ERR-6 2293600200029 MEV PER-CENT PER-CENT PER-CENT PER-CENT 2293600200030 0.1 5. 1. 3. 5. 2293600200031 ENDCOMMON 3 0 2293600200032 DATA 5 5 2293600200033 EN DATA 1ERR-T 1DATA 2ERR-T 2 2293600200034 MEV MB MB MB MB 2293600200035 8.8 150. 25. 2293600200036 9.6 167. 13. 2293600200037 10.6 357. 33. 2293600200038 11.1 440. 50. 2293600200039 11.4 420. 35. 2293600200040 ENDDATA 7 0 2293600200041 ENDSUBENT 40 0 2293600299999 ENDENTRY 2 0 2293699999999