ENTRY 22227 19961206 00002222700000001 SUBENT 22227001 19961206 00002222700100001 BIB 16 42 2222700100002 INSTITUTE (2DENAAU) 2222700100003 (2DENRIS) IRRADIATION SITE. 2222700100004 REFERENCE (J,PR/C,43,(6),2874,9106) 2222700100005 AUTHOR (M.S.THOMSEN,J.HEINEMEIER,P.HORNSHOEJ,H.L.NIELSEN, 2222700100006 N.RUD) 2222700100007 TITLE -SI-31(2.6H)(N,G)SI-32 CROSS SECTION MEASURED BY ACCE- 2222700100008 LERATOR MASS SPECTROMETRY. 2222700100009 FACILITY (REAC,2DENRIS) THE DR-3 REACTOR AT RISOE WAS USED 2222700100010 FOR IRRADIATION OF THE SAMPLES DURING 23 DAYS. 2222700100011 (VDGT,2DENAAU) THE EN-TANDEM ACCELERATOR AT AARHUS 2222700100012 WAS USED FOR ACCELERATOR MASS SEPARATION. 2222700100013 INC-SOURCE (REAC ) 2222700100014 INC-SPECT .THERMAL REACTOR SPECTRUM WITH THERMAL AND EPITHERMAL 2222700100015 FLUXES OF 1.35E+14 AND 0.12E+14 NEUTRONS/CM-2/S, RES- 2222700100016 PECTIVELY. 2222700100017 SAMPLE .TWO DISKS OF A SILICON CRYSTAL, 6 MM IN DIAMETER AND 2222700100018 1 MM THICK, WITH NATURAL ISOTOPIC ABUNDANCE, WERE 2222700100019 USED. COBALT FLUX MONITORS WERE IRRADIATED SIMUL- 2222700100020 TANEOUSLY. 2222700100021 METHOD (ASEP ) THE CROSS SECTION OF THE SI-31(N,G) REACTION 2222700100022 WAS MEASURED BY DOUBLE NEUTRON CAPTURE IN SI-30, I.E. 2222700100023 BY THE REACTION CHAIN 2222700100024 SI-30(N,G)SI-31(2.622H)(N,G)SI-32. THE FRACTION OF 2222700100025 SI-32 TO SI-30 IONS WAS DETERMINED BY ACCELERATOR MASS2222700100026 SEPARATION TECHNIQUES TO (4.57+/-0.27)E-12. 2222700100027 DETECTOR (GELI ) A CALIBRATED GELI DETECTOR WAS USED TO DETER- 2222700100028 MINE THE ACTIVITY OF THE CO MONITOR SAMPLES. 2222700100029 ANALYSIS .THE CROSS SECTION WAS DETERMINED BY USING THE WELL 2222700100030 ESTABLISHED HALF-LIFE OF SI-31 OF 2.622 H AND A THER- 2222700100031 MAL NEUTRON-CAPTURE CROSS SECTION IN SI-30 OF 2222700100032 0.107+/-0.002 B. 2222700100033 MONITOR (27-CO-59(N,G)27-CO-60-G,,SIG,,SPA) THERMAL AND EPI- 2222700100034 THERMAL CROSS SECTIONS OF 37 AND 74 B, RESPECTIVELY, 2222700100035 WERE USED. 2222700100036 CORRECTION .THE SI-32 TO SI-30 FRACTION WAS CORRECTED FOR ISOTOPIC2222700100037 FRACTIONATION OF THE IONS IN THE STRIPPING PROCESS. 2222700100038 ERR-ANALYS (DATA-ERR) NO DETAILS GIVEN. 2222700100039 STATUS .DATA TAKEN FROM MAIN REF. 2222700100040 HISTORY (930103C) N.O. 2222700100041 (930329E) 2222700100042 (961206U) + + CORRECTED BY S.MAEV 2222700100043 FACILITY CODES SPECIFIED + + 2222700100044 ENDBIB 42 0 2222700100045 NOCOMMON 0 0 2222700100046 ENDSUBENT 45 0 2222700199999 SUBENT 22227002 19930329 00002222700200001 BIB 3 4 2222700200002 REACTION (14-SI-31(N,G)14-SI-32,,SIG,,SPA) 2222700200003 STATUS .DATA TAKEN FROM MAIN REF. 2222700200004 HISTORY (930103C) N.O. 2222700200005 (930329E) 2222700200006 ENDBIB 4 0 2222700200007 NOCOMMON 0 0 2222700200008 DATA 3 1 2222700200009 EN-DUMMY DATA DATA-ERR 2222700200010 EV MB MB 2222700200011 2.5300E-02 7.3000E+01 6.0000E+00 2222700200012 ENDDATA 3 0 2222700200013 ENDSUBENT 12 0 2222700299999 ENDENTRY 2 0 2222799999999