ENTRY 23149 20111111 22282314900000001 SUBENT 23149001 20111111 22282314900100001 BIB 12 32 2314900100002 TITLE Tritium production in neutron induced reactions. 2314900100003 AUTHOR (A.Krasa, E.Andreotti, M.Angelone, M.Hult, G.Marissens,2314900100004 M.Pillon, A.Plompen) 2314900100005 REFERENCE (C,2010KRAKOW,225,2010) NEMEA-6 Workshop Proc. 2314900100006 INSTITUTE (2ZZZGEL) A.Plompen, A.Krasa, E.Andreotti, M.Hult, 2314900100007 G.Marissens. 2314900100008 (2ITYEFR) Associazione EURATOM-ENEA Sulla Fusione, 2314900100009 Centro Ricerche Frascati, Rome,Italy. 2314900100010 M.Pillon, M.Angelone. 2314900100011 FACILITY (VDG,2ZZZGEL) Van de Graaff accelerator, IRMM. 2314900100012 INC-SOURCE (D-T) Quasi-monoenergetic neutrons were produced via 2314900100013 1-H-3(d,n)2-He-4 reaction at 1-4 MeV incident deuteron2314900100014 energy. 2314900100015 Solid-state titanium-tritium target of 2 mg/cm**2 2314900100016 thickness on Au backing. 2314900100017 INC-SPECT Quasi-monoenergetic neutrons with energies 16.1 - 20.72314900100018 MeV in forward direction and down to 13 MeV at backward2314900100019 angles. Typical neutrons fluxes up to 10**8 n/sr/s . 2314900100020 Spectra were measured by TOF. 2314900100021 REL-REF (I,23142001,M.Pillon+,J,NIM/A,640,185,2011) 2314900100022 Neutron spectra measurement. 2314900100023 DETECTOR (HPGE) HPGe spectrometer of 100 % efficiency,surrounded2314900100024 by 10-cm Pb shielding with inside 1 m Cu layer. 2314900100025 (LONGC) Long counter for neutron flux time dependence 2314900100026 measurement. 2314900100027 METHOD (ACTIV) 12 days irradiation. 2314900100028 (TOF) Neutron flux spectra were determined by TOF 2314900100029 (GSPEC) Ultra Low-level Gamma-ray Spectrometry ULGS at 2314900100030 underground lab HADES - for low activity measurement. 2314900100031 ADD-RES Review of n,t c-s for several elements in 2314900100032 C,2010KRAKOW,225,2010. 2314900100033 HISTORY (20111111C) M.M. 2314900100034 ENDBIB 32 0 2314900100035 NOCOMMON 0 0 2314900100036 ENDSUBENT 35 0 2314900199999 SUBENT 23149002 20111111 22282314900200001 BIB 7 29 2314900200002 REACTION (24-CR-50(N,T)23-V-48,,SIG) 2314900200003 DECAY-DATA (23-V-48,15.9735D,DG,983.525,0.9998,DG,1312.106,0.982) 2314900200004 REL-REF (R,,T.W.Burrows,J,NDS,107,2931,2006) 2314900200005 Reference for decay data. 2314900200006 SAMPLE Three natural Cr samples (4.345 % abundance of Cr-50) 2314900200007 as discs of 5 mm thickness, 30 mm diameter, about 25 g 2314900200008 mass were irradiated at the same time. Placed at 95, 2314900200009 81, 63 deg relative to incident deuteron beam. 2314900200010 Corresponding neutron energies are 15.0+-0.6, 2314900200011 16.0+-0.4, 17.3+-0.4 MeV. 2314900200012 Zr of 0.15 mm thickness and Nb of 0.05 mm thickness 2314900200013 foils were used as beam monitor; place in front and 2314900200014 behind each Cr sample. 2314900200015 ANALYSIS EGS4 Monte Carlo code (W.R.Nelson+, SLAC report 265, 2314900200016 1985) was used to simulate the full energy peak 2314900200017 efficiencies of HPGE detectors. 2314900200018 ERR-ANALYS (ERR-T) Total uncertainty is contributed from: 2314900200019 (ERR-1) Uncertainty of efficiency determination, 2314900200020 (ERR-2) Uncertainty due to inhomogeneous activity 2314900200021 distribution in Cr sample (estimated by EGS4 code), 2314900200022 (ERR-S,2.,7.) Statistical uncertainty of Gaussian fit 2314900200023 of gamma-peaks. 2314900200024 Uncertainties of measurement time, half-life, 2314900200025 gamma-emission probability are negligible, less 0.1% . 2314900200026 STATUS (UNOBT) 2314900200027 (PRELM) Considered by compiler as preliminary - first 2314900200028 publication at C,2010KRAKOW. 2314900200029 Data are on Fig.16 of C,2010KRAKOW,225,2010 for 2314900200030 neutron energies 15.0+-0.6, 16.0+-0.4, 17.3+-0.4 MeV. 2314900200031 ENDBIB 29 0 2314900200032 COMMON 2 3 2314900200033 ERR-1 ERR-2 2314900200034 PER-CENT PER-CENT 2314900200035 5. 2. 2314900200036 ENDCOMMON 3 0 2314900200037 NODATA 0 0 2314900200038 ENDSUBENT 37 0 2314900299999 ENDENTRY 2 0 2314999999999