ENTRY 23252 20211122 230523252 0 1 SUBENT 23252001 20211122 230523252 1 1 BIB 12 35 23252 1 2 TITLE A measurement of the 14C(n,gamma)15C cross section 23252 1 3 at a stellar temperature of kT=23.3 keV 23252 1 4 AUTHOR (H.Beer, M.Wiescher, F.Kaeppeler, J.Goerres, 23252 1 5 P.E.Koehler) 23252 1 6 INSTITUTE (2GERKFK) 23252 1 7 REFERENCE (J,AJ,387,258,1992) 23252 1 8 (R,INDC(GER)-0053,2021) Revised values of Karlsruhe 23252 1 9 cross sections. 23252 1 10 FACILITY (VDG,2GERKFK) 3.75 MV Van de Graaff 23252 1 11 INC-SOURCE (P-LI7) 23252 1 12 SAMPLE (6-C-14,ENR=0.89) Powder sample (605 +/- 15 mg, 23252 1 13 2.97 cm x 1.20 cm x 0.5 cm) packed in a 0.0508 mm 23252 1 14 thick electroformed Ni container with a porous CH2 23252 1 15 plug glued into the open end. 23252 1 16 Effective irradiated sample area was 2.97 cm x 1.20 cm 23252 1 17 = 3.56 cm2. 23252 1 18 MONITOR (79-AU-197(N,G)79-AU-198,,SIG,,MXW) 23252 1 19 DETECTOR (HPGE) Relative efficiency 35%, energy resolution of 23252 1 20 1.72 keV at 1.33 MeV. 23252 1 21 27Al(p,g) resonance at 992 keV was used to determine 23252 1 22 the gamma-ray efficiency from 1.84 to 11 MeV. 23252 1 23 Pu238-C13 source with a line at 6.13 MeV was also used 23252 1 24 for the efficiency determination. 23252 1 25 METHOD (ACTIV) A fast sample changer was used. 23252 1 26 Both irradiation time and counting time are 10 sec. 23252 1 27 ERR-ANALYS (ERR-T) Quadratic error propagation from 23252 1 28 (ERR-S) 14C(n,gamma)15C statistics (23%) 23252 1 29 (ERR-1) Ge-detector efficiency for 15C (8%) 23252 1 30 (ERR-3) 14C sample weight (2.5%) 23252 1 31 (ERR-4) 15C gamma line intensity (2.9%) 23252 1 32 (ERR-7,,1.) Neutron multiple scattering (<1%) 23252 1 33 (MONIT-ERR) 197Au(n,gamma) standard cross section 23252 1 34 HISTORY (20140812C) On 23252 1 35 (20211122A) SD: Corrections in all Subents. 23252 1 36 Subent 003 added. 23252 1 37 ENDBIB 35 0 23252 1 38 COMMON 3 3 23252 1 39 ERR-1 ERR-3 ERR-4 23252 1 40 PER-CENT PER-CENT PER-CENT 23252 1 41 8. 2.5 2.9 23252 1 42 ENDCOMMON 3 0 23252 1 43 ENDSUBENT 42 0 23252 199999 SUBENT 23252002 20211122 230523252 2 1 BIB 7 10 23252 2 2 REACTION (6-C-14(N,G)6-C-15,,SIG,,MXW) 23252 2 3 DECAY-DATA (6-C-15,2.449SEC,DG,5297.79,0.68) 23252 2 4 MONIT-REF (22099001,W.Ratynski+,J,PR/C,37,595,1988) 23252 2 5 DECAY-MON (79-AU-198-G,2.694D,DG,411.8,0.9552) 23252 2 6 ERR-ANALYS (ERR-2) Ge-detector efficiency for 198Au (1.5%) 23252 2 7 (ERR-5) 198Au gamma line intensity (0.105%) 23252 2 8 (ERR-6) Misalignment of Au foils relative to 14C (2%) 23252 2 9 STATUS (TABLE) Table 3 of Astrophys.J.387(1992)258 23252 2 10 (SPSDD,23252003) Renormalized. 23252 2 11 HISTORY (20211122A) SD: BIB updated. Subent superseded. 23252 2 12 ENDBIB 10 0 23252 2 13 COMMON 3 3 23252 2 14 ERR-2 ERR-5 ERR-6 23252 2 15 PER-CENT PER-CENT PER-CENT 23252 2 16 1.5 0.105 2. 23252 2 17 ENDCOMMON 3 0 23252 2 18 DATA 6 1 23252 2 19 KT DATA ERR-T ERR-S MONIT MONIT-ERR 23252 2 20 KEV MICRO-B PER-CENT PER-CENT MB PER-CENT 23252 2 21 23.3 1.72 25. 23. 648. 1.5 23252 2 22 ENDDATA 3 0 23252 2 23 ENDSUBENT 22 0 23252 299999 SUBENT 23252003 20211122 230523252 3 1 BIB 8 15 23252 3 2 REACTION 1((6-C-14(N,G)6-C-15,,SIG,,MXW)/ 23252 3 3 (79-AU-197(N,G)79-AU-198,,SIG,,MXW)) 23252 3 4 2(6-C-14(N,G)6-C-15,,SIG,,MXW) 23252 3 5 DECAY-DATA (6-C-15,2.449SEC,DG,5297.79,0.632) 23252 3 6 DECAY-MON (79-AU-198-G,3881.0MIN,DG,411.80,0.9558) 23252 3 7 MONIT-REF (,R.Reifarth+,J,EPJ/P,133,424,2018) 23252 3 8 ANALYSIS Cross section value in Subent 23252.002 is 23252 3 9 renormalized 23252 3 10 a)for new gold cross section 23252 3 11 b) by an additional factor 0.68/0.632=1.076, which 23252 3 12 accounts for the gamma-intensity of the 5297.29 keV 23252 3 13 transition in the 15C decay (NDS/ENSDF 2020) 23252 3 14 CORRECTION Correction for revised gold standard: 681/648 =1.051 23252 3 15 STATUS (TABLE) Table on p.352 of INDC(GER)-0053 23252 3 16 HISTORY (20211122C) SD 23252 3 17 ENDBIB 15 0 23252 3 18 NOCOMMON 0 0 23252 3 19 DATA 8 1 23252 3 20 KT DATA 1ERR-T 1DATA 2ERR-T 2ERR-S 23252 3 21 MONIT MONIT-ERR 23252 3 22 KEV NO-DIM NO-DIM MICRO-B PER-CENT PER-CENT 23252 3 23 MB PER-CENT 23252 3 24 23.3 2.65E-06 0.66E-06 1.97 25. 23. 23252 3 25 681. 1.0 23252 3 26 ENDDATA 6 0 23252 3 27 ENDSUBENT 26 0 23252 399999 ENDENTRY 3 0 2325299999999