ENTRY 41522 20081216 41454152200000001 SUBENT 41522001 20081216 41454152200100001 BIB 16 68 4152200100002 TITLE Transmutation of I-129, Np-237, Pu-238, Pu-239 and 4152200100003 Am-241 using neutrons produced in target-blanket 4152200100004 system 'Energy plus Transmutation' by relativistic 4152200100005 protons. 4152200100006 AUTHOR (J.Adam, K.Katovsky, A.Balabekyan, V.G.Kalinnikov, 4152200100007 M.I.Krivopustov,H.Kumawat, A.A.Solnyshkin,V.I.Stegalov,4152200100008 G.S.Stetsenko, V.M.Tsoupko-Sitnikov, W.Westmeier) 4152200100009 INSTITUTE (4ZZZDUB) J.Adam, K.Katovsky,V.G.Kalinnikov, 4152200100010 M.I.Krivopustov,H.Kumawat, A.A.Solnyshkin, 4152200100011 V.I.Stegalov,G.S.Stetsenko, V.M.Tsoupko-Sitnikov 4152200100012 (3CZRUJF) J.Adam 4152200100013 (3CZRCTI) K.Katovsky 4152200100014 (4ARMJSU) A.Balabekyan 4152200100015 (3INDURJ) H.Kumawat 4152200100016 (2GERMBG) W.Westmeier 4152200100017 REFERENCE (J,PRM,68,(2),201,2007) 4152200100018 FACILITY (ACCEL,4ZZZDUB) Nuclotron Accelerator in Lab.of High 4152200100019 Energies of Joint Institute for Nuclear Research,Dubna.4152200100020 Target-blanket facility 'Energy plus Transmutation'. 4152200100021 INC-SOURCE (SPALL) Neutrons generated by the spallation reaction 4152200100022 of 0.7, 1.0, 1.5, 2. GeV protons and lead target 4152200100023 (84 mm diameter, 480 mm length, 43 kg mass) interact 4152200100024 with subcritical uranium blanket (300 uranium rods in 4152200100025 Al shell with 36 mm diameter, 104 mm length and 4152200100026 1.720 kg mass). 4152200100027 INC-SPECT Total number of neutrons passing through 1 cm**2 per 4152200100028 one incident 2 GeV proton was 9.70E-03. 4152200100029 Effective energies of neutrons are between 500 keV and4152200100030 14 MeV for Ep=1.5 GeV. 4152200100031 Neutron spectra obtained from threshold detectors 4152200100032 activation data for 2 GeV protons is presented on 4152200100033 Fig.4 of reference. 4152200100034 SAMPLE Radioactive samples I-129, Pu-238, Pu-239, Np-237, 4152200100035 Am-241 and natural iodine I-127. 4152200100036 METHOD (GSPEC) Transmutation reaction yields (residual nuclei 4152200100037 production yields) were determined using 4152200100038 gamma-spectroscopy. Different filters of Pb, Cd and Cu.4152200100039 DETECTOR (THRES) Set of threshold detectors (Au-197, Al-27, 4152200100040 Cu-63, Ni-58, Co-59, Ta-181, In-115,Bi-209) to study 4152200100041 the neutron field's energy distribution. 4152200100042 (SOLST) Activation or solid-state nuclear track 4152200100043 detectors at side , where beam enters. 4152200100044 (HPGE) High purity germanium detectors for gamma 4152200100045 measurement: CANBERRA GR1819 of relative intensity 4152200100046 18.9%, resolution 1.78 kev ( E-gamma 1323 keV); 4152200100047 ORTEC GMX-23200 of relative intensity 27.7%, resolution4152200100048 1.86 kev ( E-gamma 1323 keV); ORTEC GMX-20190-P of 4152200100049 relative intensity 28.3%, resolution 1.80 keV ( E-gamm 4152200100050 1323 keV). 4152200100051 MONITOR (13-AL-27(P,N+3P)11-NA-24,,SIG) The values of cross 4152200100052 sections 11.08+-0.20 , 10.51+- 0.17, 9.93+-0.17, 4152200100053 9.58+-0.17 mb were used for calculation integral number4152200100054 of protons with energies 0.7, 1.0, 1.5, 2.0 GeV, 4152200100055 respectively. 4152200100056 MONIT-REF (,W.Westmeier+,J,RCA,93,65,2005) 4152200100057 ANALYSIS Processing of measured data was performed by 4152200100058 interactive mode of Deimos code. Energy calibration, 4152200100059 background gamma-lines subtracting, single and double 4152200100060 escape peaks subtracting, efficiency calibration, 4152200100061 experimental half-lives determination were made by 4152200100062 system of codes. 4152200100063 REL-REF (N,,J.Frana,J,JRC,257,583,2003) 4152200100064 (N,,J.Adam,P,JINR-P10-28,2000) 4152200100065 (N,,J.Adam+,J,ARI,56,607,2002) 4152200100066 References for codes used in data analysis. 4152200100067 ADD-RES R-factors for Pu-238, Pu-239, Np-237, I-129, I-127, 4152200100068 Am-241 as dependence from proton energy. 4152200100069 HISTORY (20081203C) M.M. 4152200100070 ENDBIB 68 0 4152200100071 COMMON 2 3 4152200100072 EN-MIN EN-MAX 4152200100073 MEV MEV 4152200100074 0.5 14. 4152200100075 ENDCOMMON 3 0 4152200100076 ENDSUBENT 75 0 4152200199999 SUBENT 41522002 20081216 41454152200200001 BIB 3 5 4152200200002 REACTION ((95-AM-241(N,F),,SIG,,SPA)/(94-PU-239(N,F),,SIG,,SPA))4152200200003 ANALYSIS Defined from ratios of R-factors. 4152200200004 R-factor = Number of produced nuclei per 1 target 4152200200005 isotope atom per 1 incident proton. 4152200200006 STATUS Text of Reference, p.206 . 4152200200007 ENDBIB 5 0 4152200200008 NOCOMMON 0 0 4152200200009 DATA 1 1 4152200200010 DATA 4152200200011 NO-DIM 4152200200012 1.3 4152200200013 ENDDATA 3 0 4152200200014 ENDSUBENT 13 0 4152200299999 ENDENTRY 2 0 4152299999999