ENTRY 23249 20140909 22412324900000001 SUBENT 23249001 20140909 22412324900100001 BIB 17 61 2324900100002 REFERENCE (J,NDS,120,205,2014) 2324900100003 AUTHOR (J.Praena, P.F.Mastinu, M.Pignatari, J.M.Quesada, 2324900100004 R.Capote, Y.Morilla) 2324900100005 TITLE Measurement of the MACS of Tb-159(n,gamma) at kT=30 keV2324900100006 by Activation. 2324900100007 INSTITUTE (2SPNSEU) J.Praena,J.M.Quesada,Y.Morilla . 2324900100008 (2ITYPAD) P.F.Mastinu. 2324900100009 (2SWTBAS) M.Pignatari. 2324900100010 (3ZZZIAE) R.Capote. 2324900100011 REL-REF (I,,P.F.Mastinu+,J,NIM/A,601,333,2009) 2324900100012 Details of Maxwell-Boltzman Neutron Spectra (MBNS) 2324900100013 generation. 2324900100014 (R,,W.Ratynski+,J,NIM/A,727,1,2013) 2324900100015 (R,,C.Lederer+,J,PR/C,85,055809,2012) 2324900100016 (R,,H.Xiaolong+,J,NDS,110,2533,2009) Half-life for Au. 2324900100017 (R,,C.W.Reich,J,NDS,105,557,2009) Half-life for Tb. 2324900100018 FACILITY (VDGT,2SPNSEU) 3 MV Tandem Pelletron Accelerator . 2324900100019 The nominal voltage 1.789 MV, equivalent to a proton 2324900100020 energy of 3.665 MeV. 2324900100021 INC-SOURCE (P-LI7) Li-7(p,n)Be-7 reaction. 2324900100022 A thin Al foil serves as the energy degrader to 2324900100023 generate MBNS at kT = 30 keV. 2324900100024 INC-SPECT Simulation system was checked by data of neutron 2324900100025 spectra produced by 2324900100026 - monoenergetic proton beams as measured by Ratynski+ 2324900100027 and Lederer+ ; 2324900100028 -broadened beam proton as measured by Feinberg+ 2324900100029 (see REL-REFs). 2324900100030 The simulated neutron spectra compared to the MBNS at 2324900100031 kT = 30 keV are on Fig.2 of J,NDS,120,205,2014. 2324900100032 96% of the neutrons passed through the Au frontal 2324900100033 surface; 95% through the Tb frontal surface, 2324900100034 93% through the Tb back surface. Fluence ratio Au/Tb 2324900100035 was estimated to be equal to 1.02. 2324900100036 SAMPLE Au and Tb samples of diameter 2.4 cm, masses of 2324900100037 862+-1 mg and 2178+-1 mg, respectively. 2324900100038 METHOD (ACTIV) The irradiation time was about 2 h with a 2324900100039 proton current of around 3 microA on target. 2324900100040 DETECTOR (HPGE) HPGe from ORTEC (GMX Serie). 2324900100041 MONITOR (79-AU-197(N,G)79-AU-198,,SIG,,MXW) 2324900100042 MACS for Au was used as reference. 2324900100043 DECAY-MON (79-AU-198-G,2.6947D,DG,411.8,0.956) 2324900100044 MONIT-REF (22099001,W.Ratynski+,J,PR/C,37,595,1988) 2324900100045 CORRECTION Corrections Value+-Uncertainty(%) 2324900100046 Au self-absorption - 0.988 +- 0.2 2324900100047 Tb self-absorption - 0.956 +- 0.4 2324900100048 Fluence ratio - 1.02 +- 0.2 . 2324900100049 The neutron backscattering from air was considered 2324900100050 negligible. 2324900100051 298.6 kev and 297.3 keV lines were not distinguished - 2324900100052 contribution of 297.3 keV line was considered as 2324900100053 negligible due to low intensity (0.009). 2324900100054 COMMENT This work was funded by the Spanish projects 2324900100055 FPA2009-08848, FPA2011-28770-C03-02, P07-FQM-02894, 2324900100056 and the funding agencies of the participating 2324900100057 institutes. 2324900100058 M.Pignatari acknowledges support from NuGrid via the 2324900100059 Ambizione grant of the SNSF (Switzerland), the NSF 2324900100060 grants PHY 02-16783 and PHY 09-22648 (JINA) and 2324900100061 EU MIRG-CT-2006-046520, and from Eurogenesis (MASCHE). 2324900100062 HISTORY (20140909C) M.M. 2324900100063 ENDBIB 61 0 2324900100064 NOCOMMON 0 0 2324900100065 ENDSUBENT 64 0 2324900199999 SUBENT 23249002 20140909 22412324900200001 BIB 4 16 2324900200002 REACTION (65-TB-159(N,G)65-TB-160,,SIG,,MXW) MACS 2324900200003 DECAY-DATA (65-TB-160,72.3D,DG,298.6,0.266) 2324900200004 ERR-ANALYS Uncertainties were taken into account: 2324900200005 (ERR-S) Counting statistics - 0.1% 2324900200006 (ERR-1) Au self-absorption - 0.2% 2324900200007 (ERR-2) Tb self-absorption - 0.4% 2324900200008 (ERR-3) Intensity of gamma line (Au) - 0.2% 2324900200009 (ERR-4) Intensity of Gamma line (Tb) - 0.2% 2324900200010 (ERR-5) Efficiency HPGe - 5.8% 2324900200011 (ERR-6) Au half-life - 0.1% 2324900200012 (ERR-7) Tb half-life - 0.1% 2324900200013 (ERR-8) Fluence ratio - 0.2% 2324900200014 (ERR-9) Fitting procedure - 0.1% 2324900200015 (MONIT-ERR) Au monitor - 1.5% 2324900200016 (ERR-T) Total uncertainty 8.3%. 2324900200017 STATUS (TABLE) Table 1 of J,NDS,120,205,2014. 2324900200018 ENDBIB 16 0 2324900200019 COMMON 10 6 2324900200020 ERR-S ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 2324900200021 ERR-6 ERR-7 ERR-8 ERR-9 2324900200022 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2324900200023 PER-CENT PER-CENT PER-CENT PER-CENT 2324900200024 0.1 0.2 0.4 0.2 0.2 5.8 2324900200025 0.1 0.1 0.2 0.1 2324900200026 ENDCOMMON 6 0 2324900200027 DATA 5 1 2324900200028 KT DATA ERR-T MONIT MONIT-ERR 2324900200029 KEV MB MB MB PER-CENT 2324900200030 30. 2166. 181. 582. 1.5 2324900200031 ENDDATA 3 0 2324900200032 ENDSUBENT 31 0 2324900299999 ENDENTRY 2 0 2324999999999