ENTRY 41038 20210707 41974103800000001 SUBENT 41038001 20210707 41974103800100001 BIB 8 18 4103800100002 TITLE Energy dependence of the isomeric ratio of Eu-151 4103800100003 INSTITUTE (4UKRIJD) 4103800100004 AUTHOR (V.A.Pshenichnyi,E.A.Gritsai) E.Gritsai = O.Gritzay 4103800100005 REFERENCE (J,YF,51,621,1990) Issue 3. Data are given 4103800100006 (J,SNP,51,393,1990) Engl.translation of YF,51,(3),621.4103800100007 METHOD (ACTIV) 4103800100008 MONITOR No information 4103800100009 STATUS This Entry supersedes Entry 40926. 4103800100010 HISTORY (19910401C) + + Compiled at the centre - CJD + + 4103800100011 (19911021U) REACTION codes in SAN 002 to 007 corrected4103800100012 according to memo 4C-3/359 4103800100013 (20150715A) M.M. Ref.of Engl.translation was added. 4103800100014 Article was checked, BIB information was updated. 4103800100015 M -> M1 according to comment of N.Otsuka(NDS,IAEA). 4103800100016 (20210622A) Subent 008 was corrected. 4103800100017 Minor correction of free text in all Subents. 4103800100018 (20210707A) Subents 007-009 were corrected. 4103800100019 Subent 010 was added. 4103800100020 ENDBIB 18 0 4103800100021 NOCOMMON 0 0 4103800100022 ENDSUBENT 21 0 4103800199999 SUBENT 41038002 20210622 41964103800200001 BIB 7 16 4103800200002 REACTION 1(63-EU-151(N,G)63-EU-152-M1/T,,SIG/RAT,,SPA) 4103800200003 2(63-EU-151(N,G)63-EU-152-M1/T,,SIG/RAT,,SPA) 4103800200004 DECAY-DATA (63-EU-152-M1,9.3HR) 4103800200005 (63-EU-152-G,13.17YR) 4103800200006 ANALYSIS 1 Data obtained from the analysis of four groups of 4103800200007 gamma lines 121.8, 344.3, 842-867, 963-964 keV 4103800200008 2 Data obtained from the 344.30-keV gamma line 4103800200009 INC-SPECT Thermal neutrons of the reactor. 4103800200010 Upper limit of region 0.3 eV. 4103800200011 CORRECTION Background was measured by use of Cd absorber of 0.6mm4103800200012 thickness. 4103800200013 ERR-ANALYS (DATA-ERR) 4103800200014 1 Standard quadratic deviation of 4 measurements with 34103800200015 degrees of freedom. 4103800200016 2 Errors are not specified 4103800200017 STATUS (TABLE) Table 1 of Sov.Nucl.Phys.,v.51,p.393,1990 4103800200018 ENDBIB 16 0 4103800200019 COMMON 1 3 4103800200020 EN-MAX 4103800200021 EV 4103800200022 0.3 4103800200023 ENDCOMMON 3 0 4103800200024 DATA 5 1 4103800200025 EN-DUMMY DATA 1DATA-ERR 1DATA 2DATA-ERR 2 4103800200026 EV NO-DIM NO-DIM NO-DIM NO-DIM 4103800200027 2.53E-02 0.395 0.008 0.394 0.005 4103800200028 ENDDATA 3 0 4103800200029 ENDSUBENT 28 0 4103800299999 SUBENT 41038003 20210622 41964103800300001 BIB 7 18 4103800300002 REACTION 1(63-EU-151(N,G)63-EU-152-M1/T,,SIG/RAT,,EPI) 4103800300003 2(63-EU-151(N,G)63-EU-152-M1/T,,SIG/RAT,,EPI) 4103800300004 DECAY-DATA (63-EU-152-M1,9.3HR) 4103800300005 (63-EU-152-G,13.17YR) 4103800300006 ANALYSIS 1 Data obtained from the analysis of four groups of 4103800300007 gamma lines 121.8, 344.3, 842-867, 963-964 keV 4103800300008 2 Data obtained from the 344.30-keV gamma line 4103800300009 INC-SPECT Epicadmium neutrons 4103800300010 ERR-ANALYS (DATA-ERR) 4103800300011 1 Standard quadratic deviation of 4 measurements with 34103800300012 degrees of freedom. 4103800300013 2 Errors are not specified 4103800300014 STATUS (TABLE) Table 1 of Sov.Nucl.Phys.,v.51,p.393,1990 4103800300015 HISTORY (20150715A) M.M. EN-MIN=0.18 eV => 0.3 eV ( as 4103800300016 mentioned in the article). 4103800300017 EN-MAX=100.eV value were inserted as on Fig.1 of 4103800300018 Sov.Nucl.Phys.,v.51,p.393,1990. 4103800300019 SPA was added in REACTION. 4103800300020 ENDBIB 18 0 4103800300021 COMMON 1 3 4103800300022 EN-MAX 4103800300023 EV 4103800300024 100. 4103800300025 ENDCOMMON 3 0 4103800300026 DATA 5 1 4103800300027 EN-MIN DATA 1DATA-ERR 1DATA 2DATA-ERR 2 4103800300028 EV NO-DIM NO-DIM NO-DIM NO-DIM 4103800300029 0.3 0.398 0.009 0.399 0.004 4103800300030 ENDDATA 3 0 4103800300031 ENDSUBENT 30 0 4103800399999 SUBENT 41038004 20210622 41964103800400001 BIB 6 10 4103800400002 REACTION (63-EU-151(N,G)63-EU-152-M1/T,,SIG/RAT) 4103800400003 DECAY-DATA (63-EU-152-M1,9.3HR,DG,344.30) 4103800400004 (63-EU-152-G,13.17YR,DG,344.30) 4103800400005 METHOD (FNB) Neutrons from the scandium filter. 4103800400006 Cd filter in boron container was used to exclude 4103800400007 influence of neutrons slowed down in the shielding. 4103800400008 CORRECTION Background was estimated by manganese filter to be 4103800400009 about 2%. 4103800400010 ERR-ANALYS (DATA-ERR) Errors are not specified 4103800400011 STATUS (TABLE) Table 1 of Sov.Nucl.Phys.,v.51,p.393,1990 4103800400012 ENDBIB 10 0 4103800400013 NOCOMMON 0 0 4103800400014 DATA 4 1 4103800400015 EN EN-RSL-HW DATA DATA-ERR 4103800400016 KEV KEV NO-DIM NO-DIM 4103800400017 2.0 0.4 0.412 0.005 4103800400018 ENDDATA 3 0 4103800400019 ENDSUBENT 18 0 4103800499999 SUBENT 41038005 20210622 41964103800500001 BIB 7 18 4103800500002 REACTION 1(63-EU-151(N,G)63-EU-152-M1/T,,SIG/RAT) 4103800500003 2(63-EU-151(N,G)63-EU-152-M1/T,,SIG/RAT) 4103800500004 DECAY-DATA1(63-EU-152-M1,9.3HR,DG,121.8,,DG,344.2) 4103800500005 (63-EU-152-G,13.17YR,DG,121.8,,DG,344.2) 4103800500006 2(63-EU-152-M1,9.3HR,DG,344.2) 4103800500007 (63-EU-152-G,13.17YR,DG,344.2) 4103800500008 ANALYSIS 1 Data obtained from the analysis of the several gamma 4103800500009 lines 4103800500010 2 Data obtained from the 344-keV gamma line 4103800500011 METHOD (FNB) Neutrons from the silicon+sulphur filters. 4103800500012 Cd filter . 4103800500013 CORRECTION Background was defined by set of Ti screens to be ~42%4103800500014 Correction according to assumption that the value of 4103800500015 the isomeric ratio for background of fast neutrons is 4103800500016 equal to the value of the isomeric ratio for Cf-252 4103800500017 fission-spectrum neutrons. 4103800500018 ERR-ANALYS (DATA-ERR) Errors are not specified 4103800500019 STATUS (TABLE) Table 1 of Sov.Nucl.Phys.,v.51,p.393,1990 4103800500020 ENDBIB 18 0 4103800500021 NOCOMMON 0 0 4103800500022 DATA 6 1 4103800500023 EN EN-RSL-HW DATA 1DATA-ERR 1DATA 2DATA-ERR 24103800500024 KEV KEV NO-DIM NO-DIM NO-DIM NO-DIM 4103800500025 55. 1.5 0.413 0.006 0.411 0.008 4103800500026 ENDDATA 3 0 4103800500027 ENDSUBENT 26 0 4103800599999 SUBENT 41038006 20210622 41964103800600001 BIB 7 19 4103800600002 REACTION 1(63-EU-151(N,G)63-EU-152-M1/T,,SIG/RAT) 4103800600003 2(63-EU-151(N,G)63-EU-152-M1/T,,SIG/RAT) 4103800600004 DECAY-DATA1(63-EU-152-M1,9.3HR,DG,121.8,,DG,344.2) 4103800600005 (63-EU-152-G,13.17YR,DG,121.8,,DG,344.2) 4103800600006 2(63-EU-152-M1,9.3HR,DG,344.2) 4103800600007 (63-EU-152-G,13.17YR,DG,344.2) 4103800600008 ANALYSIS 1 Data obtained from the analysis of the several gamma 4103800600009 lines 4103800600010 2 Data obtained from the 344-keV gamma line 4103800600011 METHOD (FNB) Neutrons from the silicon+titanium filters. 4103800600012 Cd filter. 4103800600013 CORRECTION Background was defined by set of sulfur screens to be 4103800600014 about 33%. 4103800600015 Correction according to assumption that the value of 4103800600016 the isomeric ratio for background of fast neutrons is 4103800600017 equal to the value of the isomeric ratio for Cf-252 4103800600018 fission-spectrum neutrons. 4103800600019 ERR-ANALYS (DATA-ERR) Errors are not specified 4103800600020 STATUS (TABLE) Table 1 of Sov.Nucl.Phys.,v.51,p.393,1990 4103800600021 ENDBIB 19 0 4103800600022 NOCOMMON 0 0 4103800600023 DATA 6 1 4103800600024 EN EN-RSL-HW DATA 1DATA-ERR 1DATA 2DATA-ERR 24103800600025 KEV KEV NO-DIM NO-DIM NO-DIM NO-DIM 4103800600026 144. 25. 0.371 0.004 0.366 0.006 4103800600027 ENDDATA 3 0 4103800600028 ENDSUBENT 27 0 4103800699999 SUBENT 41038007 20210707 41974103800700001 BIB 12 59 4103800700002 REACTION 1(63-EU-151(N,G)63-EU-152-M1/T,,SIG/RAT,,FIS) 4103800700003 2(63-EU-151(N,G)63-EU-152-M1/T,,SIG/RAT,,FIS) 4103800700004 DECAY-DATA1(63-EU-152-M1,9.3HR,DG,121.8,,DG,344.2) 4103800700005 (63-EU-152-G,13.17YR,DG,121.8,,DG,344.2) 4103800700006 2(63-EU-152-M1,9.3HR,DG,344.2) 4103800700007 (63-EU-152-G,13.17YR,DG,344.2) 4103800700008 DETECTOR (GELI) 4103800700009 ANALYSIS 1 Data obtained from the analysis of the several gamma 4103800700010 lines 4103800700011 2 Data obtained from the 344-keV gamma line 4103800700012 INC-SOURCE (CF252) ~1.5E+7 n/sec +-8% . 4103800700013 SAMPLE (63-EU-151,ENR=0.977) 4103800700014 Eu oxide powder, Eu-151 enrichment 97.7 % 4103800700015 METHOD Two irradiations: 4103800700016 - 112.67 hr ; 97.7% Eu-151 enrichment; Cf source inside4103800700017 cylindrical container of sample; 4103800700018 - 284.17 hr ; Cf source placed close to the bottom of 4103800700019 the sample container. 4103800700020 Eu-153 samples ( 99.2% enrichment) irradiation 4103800700021 duration 116.7 hr. 4103800700022 CORRECTION Eu-154 123.8 keV line contribution due to Eu-153 4103800700023 presence in the sample was taken into account by 4103800700024 irradiation of Eu-153 sample in additional measurement.4103800700025 Influence of self-absorption on isomeric ratio (IR) 4103800700026 is less +1.%. 4103800700027 Scattering of neutrons in oxygen existing in the sample4103800700028 and subsequent capture in Eu can increase IR by < 1.%. 4103800700029 COMMENT Of authors. 4103800700030 - If Cf-252 spectrum is described by Maxwellian 4103800700031 distribution with average energy 2.13 MeV, 4103800700032 and the energy dependence of Eu-151 capture c-s is 4103800700033 described by Hauser-Feshbach formula, 4103800700034 then the effective energy of interaction of Eu nuclei 4103800700035 with the Cf SF spectrum neutrons is about 1.4 MeV. 4103800700036 Of compiler M.M. 4103800700037 On Fig.1 this data are plotted at energy EN=1.4 MeV 4103800700038 with energy error bars - EN-MIN about 150 keV and 4103800700039 EN-MAX about 9 MeV. 4103800700040 - Of authors. 4103800700041 The Cf broad energy spectrum does not permit 4103800700042 unambiguous treatment of our results, but the increase 4103800700043 of relative yield of the isomer may be due to two 4103800700044 processes in the highly excited nucleus: 4103800700045 1) inclusion of the channel of inelastic scattering 4103800700046 with excitation of the Eu-151 level (196 keV) with 4103800700047 presumed spin 3/2+ ( this level was observed in 4103800700048 Eu-151(d,d') reaction by E.Bernstein+, 4103800700049 J,PL/B,33,(7),465,1970; 4103800700050 doi:10.1016/0370-2693(70)90218-2); 4103800700051 2) the possibility of existence of processes in which 4103800700052 enhancement of E2 transitions ar retardation of E1 4103800700053 transitions occurs, decreasing the dependence of 4103800700054 population of the ground and isomeric states on the 4103800700055 spin of the highly excited states. 4103800700056 ERR-ANALYS (DATA-ERR) Errors are not specified 4103800700057 STATUS (TABLE) Table 1 of Sov.Nucl.Phys.,v.51,p.393,1990 4103800700058 HISTORY (20150715A) M.M. FIS was added in REACTION. 4103800700059 EN-MEAN -> KT-DUMMY - comment of N.Otsuka (NDS,IAEA). 4103800700060 (20210707U) SAMPLE was added 4103800700061 ENDBIB 59 0 4103800700062 NOCOMMON 0 0 4103800700063 DATA 5 1 4103800700064 KT-DUMMY DATA 1DATA-ERR 1DATA 2DATA-ERR 2 4103800700065 MEV NO-DIM NO-DIM NO-DIM NO-DIM 4103800700066 1.42 0.388 0.010 0.386 0.023 4103800700067 ENDDATA 3 0 4103800700068 ENDSUBENT 67 0 4103800799999 SUBENT 41038008 20210707 41974103800800001 BIB 10 23 4103800800002 REACTION 1(63-EU-151(N,G)63-EU-152-M1,,SIG,,FIS) 4103800800003 2(63-EU-151(N,G)63-EU-152-G+M2,,SIG,,FIS) 4103800800004 INC-SOURCE (CF252) ~1.5E+7 (+-8%) n/sec. 4103800800005 SAMPLE (63-EU-151,ENR=0.977) 4103800800006 Eu oxide powder, Eu-151 enrichment 97.7 % 4103800800007 DETECTOR (GELI) 4103800800008 DECAY-DATA1(63-EU-152-M1,9.3HR) 4103800800009 2(63-EU-152-G,13.17YR) 4103800800010 REL-REF 1(A,11675022,A.E.Johnsrud+,J,PR,116,927,1959) 4103800800011 140 mb for 1.4 MeV. 4103800800012 COMMENT 2 Of compiler. Eu-152-M2 ( HL=96 min, IT=100%,39.75 keV,4103800800013 leads finally to ground state; contribution of week 4103800800014 12.965 keV, 0.41% from the 89.8keV, 384nsec level, 4103800800015 leading finally to state 9.3hr could be considered as 4103800800016 negligible ) was not known well at dates of 4103800800017 this measurement. 4103800800018 ERR-ANALYS (DATA-ERR) Errors are not specified 4103800800019 STATUS (TABLE) Text page 396 of Sov.Nucl.Phys.,v.51,p.393,19904103800800020 HISTORY (20150715A) M.M. FIS was added in REACTION, G => G+M2. 4103800800021 EN-MEAN -> KT-DUMMY - comment of N.Otsuka (NDS,IAEA). 4103800800022 (20210622A) SF3: X -> G in REACTION 2 according to 4103800800023 a comment of N.Otsuka (NDS,IAEA). 4103800800024 (20210707U) SAMPLE was added. 4103800800025 ENDBIB 23 0 4103800800026 NOCOMMON 0 0 4103800800027 DATA 5 1 4103800800028 KT-DUMMY DATA 1DATA-ERR 1DATA 2DATA-ERR 2 4103800800029 MEV MB MB MB MB 4103800800030 1.42 144. 12. 220. 20. 4103800800031 ENDDATA 3 0 4103800800032 ENDSUBENT 31 0 4103800899999 SUBENT 41038009 20210707 41974103800900001 BIB 7 10 4103800900002 REACTION (63-EU-151(N,G)63-EU-152,,SIG,,FIS) 4103800900003 INC-SOURCE (CF252) 4103800900004 SAMPLE (63-EU-151,ENR=0.977) 4103800900005 Eu oxide powder, Eu-151 enrichment 97.7 % 4103800900006 DETECTOR (GELI) 4103800900007 ERR-ANALYS (DATA-ERR) Errors are not specified 4103800900008 STATUS (TABLE) Text page 396 of Sov.Nucl.Phys.,v.51,p.393,19904103800900009 HISTORY (20150715A) M.M. FIS was added in REACTION. 4103800900010 EN-MEAN -> KT-DUMMY - comment of N.Otsuka (NDS,IAEA). 4103800900011 (20210707U) SAMPLE was added 4103800900012 ENDBIB 10 0 4103800900013 NOCOMMON 0 0 4103800900014 DATA 3 1 4103800900015 KT-DUMMY DATA DATA-ERR 4103800900016 MEV MB MB 4103800900017 1.42 370. 25. 4103800900018 ENDDATA 3 0 4103800900019 ENDSUBENT 18 0 4103800999999 SUBENT 41038010 20210707 41974103801000001 BIB 7 8 4103801000002 REACTION (63-EU-153(N,G)63-EU-154,,SIG,,FIS) 4103801000003 INC-SOURCE (CF252) 4103801000004 SAMPLE (63-EU-153,ENR=0.992) Irradiation 116.5 hr. 4103801000005 DETECTOR (GELI) 4103801000006 ERR-ANALYS (DATA-ERR) Type of error is not explained in the 4103801000007 article. 4103801000008 STATUS (TABLE) Text page 396 of Sov.Nucl.Phys.,v.51,p.393,19904103801000009 HISTORY (20210707A) M.M. 4103801000010 ENDBIB 8 0 4103801000011 NOCOMMON 0 0 4103801000012 DATA 3 1 4103801000013 KT-DUMMY DATA DATA-ERR 4103801000014 MEV MB MB 4103801000015 1.42 226. 20. 4103801000016 ENDDATA 3 0 4103801000017 ENDSUBENT 16 0 4103801099999 ENDENTRY 10 0 4103899999999