ENTRY 22134 20220210 23092213400000001 SUBENT 22134001 20220210 23092213400100001 BIB 13 42 2213400100002 TITLE Nuclear charge distribution in the reactor neutron 2213400100003 induced fission of 232-Th, fractional cumulative 2213400100004 yields of the isotopes of krypton and xenon 2213400100005 AUTHOR (A.Srivastava,H.O.Denschlag) 2213400100006 REFERENCE (J,RCA,46,17,1989) Main ref. 2213400100007 (P,NEANDC(E)-292,(5),38,1988) 2213400100008 (P,MAINZ-1987,17,1988) 2213400100009 INSTITUTE (2GERMNZ) 2213400100010 FACILITY (REAC,2GERMNZ) The Mainz triga reactor was used for the2213400100011 irradiations. 2213400100012 INC-SOURCE (REAC) The irradiation position was in the center of 2213400100013 the reactor, where the fast, epi-cadmium neutron flux 2213400100014 is of the order of 1.0E+11 neutrons/cm2 and sec. 2213400100015 INC-SPECT Fast reactor spectrum with a cadmium ratio of about 2213400100016 30. 2213400100017 METHOD (OLMS) The fission fragments recoiling out of the 2213400100018 sample foil were stopped in a layer of magnesium 2213400100019 stearate from which only the rare gases diffused into 2213400100020 an adjacent evacuated space where they decayed to 2213400100021 longer lived descendents that deposited on the walls. 2213400100022 (ABSFY) by measuring the activity of the descendents, 2213400100023 the fractional cumulative yield could Be determined 2213400100024 directly. 2213400100025 DETECTOR (GE-IN) After radiochemical separation of the 2213400100026 descendents in the stearate and on the walls, the 2213400100027 activity of the samples were counted in a fixed 2213400100028 geometry on a 154 cm3 intrinsic germanium detector, 2213400100029 having a resolution of 1.8 keV at 1332 keV. 2213400100030 SAMPLE The sample was a 232-Th metal foil with a thickness 2213400100031 of 10 um and a weight of 1 mg. The sample was mounted 2213400100032 in an irradiation setup made of polyethylene in order 2213400100033 to minimize the dose from neutron activation. The 2213400100034 sample was irradiated for 60 min. 2213400100035 CORRECTION The activities were corrected for chemical yield, for 2213400100036 the gas volume between the Th-target and stearate, and2213400100037 for the non negligible gas volume within the stearate 2213400100038 grains. 2213400100039 ERR-ANALYS (DATA-ERR) No details given. 2213400100040 HISTORY (19891104C) N.O. 2213400100041 (19910522A) S.W. En corrected 2213400100042 (20220210A) SD:Updated to new date formats,lower case. 2213400100043 Corrections in all Subents. Ref. on MAINZ-1987 added. 2213400100044 ENDBIB 42 0 2213400100045 COMMON 1 3 2213400100046 EN-MEAN 2213400100047 MEV 2213400100048 3.0000E+00 2213400100049 ENDCOMMON 3 0 2213400100050 ENDSUBENT 49 0 2213400199999 SUBENT 22134002 20220210 23092213400200001 BIB 4 11 2213400200002 REACTION (90-TH-232(N,F)ELEM/MASS,CUM,FY,,FRC/SPA) 2213400200003 DECAY-DATA ((1.)38-SR-91,9.52HR,G,1024.3,.334) 2213400200004 ((2.)38-SR-92,2.71HR,G,1383.9,.900) 2213400200005 ((3.)39-Y-93-G,10.10HR,G,266.9,.0698) 2213400200006 ((4.)56-BA-139,1.38HR,G,165.8,.238) 2213400200007 ((5.)56-BA-140,12.75D,G,537.3,.244) 2213400200008 ((6.)58-CE-141,32.50D,G,145.4,.484) 2213400200009 ((7.)57-LA-142,1.52HR,G,641.2,.474) 2213400200010 ((8.)58-CE-143,33.0HR,G,293.3,.428) 2213400200011 STATUS (TABLE) Tbl.2 from Radioch.Acta,46(1989)17 2213400200012 HISTORY (20220210A) SD: REACTION code and STATUS updated. 2213400200013 ENDBIB 11 0 2213400200014 NOCOMMON 0 0 2213400200015 DATA 5 8 2213400200016 ELEMENT MASS DATA DATA-ERR DECAY-FLAG 2213400200017 NO-DIM NO-DIM NO-DIM NO-DIM NO-DIM 2213400200018 36. 91. 0.84 0.02 1. 2213400200019 36. 92. 0.58 0.03 2. 2213400200020 36. 93. 0.27 0.01 3. 2213400200021 54. 139. 0.95 0.01 4. 2213400200022 54. 140. 0.89 0.02 5. 2213400200023 54. 141. 0.55 0.05 6. 2213400200024 54. 142. 0.35 0.01 7. 2213400200025 54. 143. 0.11 0.04 8. 2213400200026 ENDDATA 10 0 2213400200027 ENDSUBENT 26 0 2213400299999 ENDENTRY 2 0 2213499999999