ENTRY 31522 20030131 00003152200000001 SUBENT 31522001 20030131 00003152200100001 BIB 16 35 3152200100002 INSTITUTE (3ARGCAB) 3152200100003 REFERENCE (J,JRN/L,212,(5),353,1996) 3152200100004 AUTHOR (I.M.COHEN,A.J.KESTELMAN,J.C.FURNARI,M.A.ARRIBERE) 3152200100005 TITLE Determination of Ge-70(n,p)Ga-70 and 3152200100006 Ge-74(n,p)Ga-74 reaction cross sections for a fission 3152200100007 neutron spectrum 3152200100008 FACILITY (REAC) Pneumatic facility of RA-6 reactor 3152200100009 INC-SOURCE (REAC) 3152200100010 Fast flux at irradiation position was 3152200100011 about 8.0E+11 neutrons/cm**2/sec. 3152200100012 SAMPLE Hyperpure detector-grade Ge slices of about 250 mg. 3152200100013 Thickness was about 0.15 cm. 3152200100014 METHOD (ACTIV) Activation. Absorbers of Pb, Cd, and Cu were 3152200100015 placed in front of the detector to attenuate low 3152200100016 energy gammas. Samples were measured at 4.8 cm from 3152200100017 the detector front end. 3152200100018 DETECTOR (HPGE) 3152200100019 Absolute efficiency was determined to an accuracy 3152200100020 of 3.5%. 3152200100021 MONITOR ((MONIT1)22-TI-46(N,P)21-SC-46,,SIG,,FIS) 3152200100022 ((MONIT2)22-TI-47(N,P)21-SC-47,,SIG,,FIS) 3152200100023 ((MONIT3)22-TI-48(N,P)21-SC-48,,SIG,,FIS) 3152200100024 ((MONIT4)28-NI-58(N,P)27-CO-58,,SIG,,FIS) 3152200100025 MONIT-REF (,J.H.BAARD+,B,BAARD,,1989) 3152200100026 DECAY-MON ((MONIT1)21-SC-46-G,83.81D,DG,889.3,0.999840, 3152200100027 DG,1120.5,0.999870) 3152200100028 ((MONIT2)21-SC-47,3.345D,DG,159.4,0.683) 3152200100029 ((MONIT3)21-SC-48,43.7HR,DG,983.5,1.0) 3152200100030 ((MONIT4)27-CO-58-G,70.82D,DG,810.8,0.9944) 3152200100031 CORRECTION No pile-up or coincidence effects were observed. 3152200100032 ERR-ANALYS (ERR-T) Errors include statistical dispersion of 4 3152200100033 determinations and systematic uncertainties of 3152200100034 nuclear constants involved. 3152200100035 STATUS Data taken from main ref., p.358. 3152200100036 HISTORY (20021105C) OS. 3152200100037 ENDBIB 35 0 3152200100038 COMMON 9 6 3152200100039 EN-DUMMY MONIT1 MONIT1-ERR MONIT2 MONIT2-ERR MONIT3 3152200100040 MONIT3-ERR MONIT4 MONIT4-ERR 3152200100041 MEV MB MB MB MB MB 3152200100042 MB MB MB 3152200100043 1.5 11.8 0.4 18.0 0.6 0.307 3152200100044 0.011 111. 3. 3152200100045 ENDCOMMON 6 0 3152200100046 ENDSUBENT 45 0 3152200199999 SUBENT 31522002 20021105 00003152200200001 BIB 4 8 3152200200002 REACTION (32-GE-70(N,P)31-GA-70,,SIG,,FIS) 3152200200003 ANALYSIS Result is average of 4 determinations 3152200200004 CORRECTION A radiochemical method was developed to make sure 3152200200005 that no Gallium was present in the sample which would 3152200200006 contribute to Ga-70 production through the 3152200200007 Ga-69(n,gamma) reaction. 3152200200008 DECAY-DATA (31-GA-70,21.14MIN,DG,1093.3,.65) 3152200200009 Self-attenuation was 2.3% 3152200200010 ENDBIB 8 0 3152200200011 NOCOMMON 0 0 3152200200012 DATA 2 1 3152200200013 DATA ERR-T 3152200200014 MB MB 3152200200015 3.10 0.30 3152200200016 ENDDATA 3 0 3152200200017 ENDSUBENT 16 0 3152200299999 SUBENT 31522003 20021105 00003152200300001 BIB 3 6 3152200300002 REACTION (32-GE-74(N,P)31-GA-74,,SIG,,FIS) 3152200300003 ANALYSIS Result is average of 4 determinations 3152200300004 DECAY-DATA (31-GA-74-G,8.12MIN,DG,595.9,.914) 3152200300005 Self-attenuation was 3.6% 3152200300006 (31-GA-74-G,8.12MIN,DG,2353.6,.445) 3152200300007 Self-attenuation was 1.3% 3152200300008 ENDBIB 6 0 3152200300009 NOCOMMON 0 0 3152200300010 DATA 2 1 3152200300011 DATA ERR-T 3152200300012 MB MB 3152200300013 0.00938 0.00059 3152200300014 ENDDATA 3 0 3152200300015 ENDSUBENT 14 0 3152200399999 ENDENTRY 3 0 3152299999999