ENTRY 30176 20080208 31263017600000001 SUBENT 30176001 20080208 31263017600100001 BIB 14 33 3017600100002 INSTITUTE (3HUNKFI) 3017600100003 REFERENCE (R,KFKI-18/1963,196309) Full information 3017600100004 AUTHOR (I.Gulyas,Z.Zamori) 3017600100005 TITLE Measurement of isomeric cross-section ratio for the 3017600100006 Ce-133(n,g) reaction with thermal neutrons 3017600100007 FACILITY (REAC) reactor 3017600100008 INC-SPECT Neutrons from the thermal reactor 3017600100009 SAMPLE Salt- 0.25 gram of spectroscopic pure CsCl 3017600100010 METHOD (ACTIV) activation method 3017600100011 DETECTOR (NAICR) 7.5cm*7.5cm NaI(Tl)phosphor + EMI 6711 type, 3017600100012 10 cm cathode diameter multiplier. The detector is 3017600100013 placed in the middle of a 1x1x1 m lead house with 10 cm3017600100014 thick walls. 3017600100015 55-Cs-134-M1 residual nucleus left in its 137 keV 3017600100016 isomeric state whose half-life is 2.895+-0.005 Hours. 3017600100017 ANALYSIS The following internal conversion coefficients of the 3017600100018 127 keV gamma line (from isomeric state) were used: 3017600100019 .Alpha(K) = 2.6+-0.04 (Keisch,J.Inorg.Nucl.Chem.17, 3017600100020 183,1961)3017600100021 .Relative intensity of partial conversion coefficients3017600100022 K/l/m = 23/34/6 (Caldwell,Phys.Rev.78,407(1950)) 3017600100023 The 797 keV and 802 keV gamma transitions of Ba-134 3017600100024 were used to determine the ground state activity of 3017600100025 Cs-134. They were found to represent respectively 3017600100026 72.5 and 10.5% of this activity. According to 3017600100027 Keister (Phys.Rev.97,451(1955)), Alpha(K) is less than 3017600100028 0.003 for both transitions, thus negligible for the 3017600100029 experiment accuracy. 3017600100030 PART-DET (DG) Decay gammas 3017600100031 STATUS (TABLE) Data from KFKI-18/1963 3017600100032 HISTORY (19720510C) CA. 3017600100033 (20080208A) BIB section updated 3017600100034 ERR-ANALYS no information 3017600100035 ENDBIB 33 0 3017600100036 COMMON 1 3 3017600100037 EN-DUMMY 3017600100038 EV 3017600100039 2.5300E-02 3017600100040 ENDCOMMON 3 0 3017600100041 ENDSUBENT 40 0 3017600199999 SUBENT 30176002 20080208 31263017600200001 BIB 1 1 3017600200002 REACTION (55-CS-133(N,G)55-CS-134-M/G,,SIG/RAT,,SPA) 3017600200003 ENDBIB 1 0 3017600200004 NOCOMMON 0 0 3017600200005 DATA 2 1 3017600200006 DATA DATA-ERR 3017600200007 NO-DIM NO-DIM 3017600200008 6.9800E-02 5.5000E-03 3017600200009 ENDDATA 3 0 3017600200010 ENDSUBENT 9 0 3017600299999 ENDENTRY 2 0 3017699999999