ENTRY 31693 20100508 31453169300000001 SUBENT 31693001 20100508 31453169300100001 BIB 16 41 3169300100002 TITLE Measurements of the thermal neutron cross-sections 3169300100003 and resonance integrals for 186W(n,gamma)187W and 3169300100004 98Mo(n,gamma)99Mo reactions 3169300100005 AUTHOR (A.El Abd) 3169300100006 INSTITUTE (3EGYCAI) 3169300100007 REFERENCE (J,JRN,284,321,2010) 3169300100008 FACILITY (REAC,3EGYCAI) Second Egyptian Research Reactor(ETRR-2)3169300100009 INC-SOURCE 2200 m/s neutrons 3169300100010 SAMPLE Natural W, Mo, and Zr metallic foils of the purity 3169300100011 99.99%; and 0.23 mm, 0.15 mm and 125 mu-m in 3169300100012 thickness altogether with Au samples which are 3169300100013 diluted in Al (0.1%) were wrapped with aluminum 3169300100014 foils and irradiated without Cd shield in two 3169300100015 different positions at the ETRR-2. The irradiation 3169300100016 time varied from 2 to 3 h. 3169300100017 MONITOR ((MONIT1)79-AU-197(N,G)79-AU-198,,SIG,,MXW) 3169300100018 ((MONIT2)79-AU-197(N,G)79-AU-198,,RI) 3169300100019 DECAY-MON (79-AU-198-G,2.695D,DG,411.8,0.9558) 3169300100020 DETECTOR (HPGE) The gamma ray spectra were collected using a 3169300100021 p-type coaxial EG&G Ortec HPGe detector, with 29.4% 3169300100022 relative efficiency and 1.66 keV FWHM at 1332.5 keV 3169300100023 of 60Co. 3169300100024 ANALYSIS The neutron spectrum parameters characterizing the 3169300100025 irradiation positions f and alpha were determined 3169300100026 using the activated sets 198Au, 97Zr/97Nb and 3169300100027 95Zr/95Nb. 3169300100028 METHOD The thermal neutron cross-sections and resonance 3169300100029 integrals of the 186W(n,gamma)187W and 3169300100030 98Mo(n,gamma)99Mo reactions were determined via 3169300100031 neutron irradiation without Cd shield in two 3169300100032 different neutron irradiation positions instead of 3169300100033 the traditional method of irradiation with and 3169300100034 without Cd shield in one neutron irradiation position.3169300100035 CORRECTION Neutron self shielding and the deviation from the 3169300100036 1/E law corrections were taken into account. 3169300100037 ERR-ANALYS (DATA-ERR) The uncertainty for thermal cross- 3169300100038 sections and resonance integrals are found less than 3169300100039 13% of the determined values. 3169300100040 STATUS (TABLE) data from the text of JRN,284,321,2010 3169300100041 (APRVD) Entry approved by Dr. A.El Abd 3169300100042 HISTORY (20100508C) SD 3169300100043 ENDBIB 41 0 3169300100044 COMMON 5 3 3169300100045 EN-DUMMY MONIT1 MONIT1-ERR MONIT2 MONIT2-ERR 3169300100046 EV B B B B 3169300100047 0.0253 98.65 0.09 1560. 28. 3169300100048 ENDCOMMON 3 0 3169300100049 ENDSUBENT 48 0 3169300199999 SUBENT 31693002 20100508 31453169300200001 BIB 2 7 3169300200002 REACTION (74-W-186(N,G)74-W-187,,SIG) 3169300200003 DECAY-DATA (74-W-187,23.72HR,DG,134.25,0.094, 3169300200004 DG,479.55,0.218, 3169300200005 DG,551.52,0.0508, 3169300200006 DG,618.26,0.0628, 3169300200007 DG,625.54,0.0117, 3169300200008 DG,685.73,0.273) 3169300200009 ENDBIB 7 0 3169300200010 NOCOMMON 0 0 3169300200011 DATA 2 1 3169300200012 DATA DATA-ERR 3169300200013 B B 3169300200014 38.43 4.0 3169300200015 ENDDATA 3 0 3169300200016 ENDSUBENT 15 0 3169300299999 SUBENT 31693003 20100508 31453169300300001 BIB 2 7 3169300300002 REACTION (74-W-186(N,G)74-W-187,,RI) 3169300300003 DECAY-DATA (74-W-187,23.72HR,DG,134.25,0.094, 3169300300004 DG,479.55,0.218, 3169300300005 DG,551.52,0.0508, 3169300300006 DG,618.26,0.0628, 3169300300007 DG,625.54,0.0117, 3169300300008 DG,685.73,0.273) 3169300300009 ENDBIB 7 0 3169300300010 NOCOMMON 0 0 3169300300011 DATA 2 1 3169300300012 DATA DATA-ERR 3169300300013 B B 3169300300014 502. 65. 3169300300015 ENDDATA 3 0 3169300300016 ENDSUBENT 15 0 3169300399999 SUBENT 31693004 20100508 31453169300400001 BIB 2 6 3169300400002 REACTION (42-MO-98(N,G)42-MO-99,,SIG) 3169300400003 DECAY-DATA (42-MO-99,2.748D,DG,140.51,0.0452, 3169300400004 DG,181.06,0.0599, 3169300400005 DG,366.44,0.0121, 3169300400006 DG,739.50,0.1213, 3169300400007 DG,777.92,0.0426) 3169300400008 ENDBIB 6 0 3169300400009 NOCOMMON 0 0 3169300400010 DATA 2 1 3169300400011 DATA DATA-ERR 3169300400012 B B 3169300400013 0.137 0.014 3169300400014 ENDDATA 3 0 3169300400015 ENDSUBENT 14 0 3169300499999 SUBENT 31693005 20100508 31453169300500001 BIB 2 6 3169300500002 REACTION (42-MO-98(N,G)42-MO-99,,RI) 3169300500003 DECAY-DATA (42-MO-99,2.748D,DG,140.51,0.0452, 3169300500004 DG,181.06,0.0599, 3169300500005 DG,366.44,0.0121, 3169300500006 DG,739.50,0.1213, 3169300500007 DG,777.92,0.0426) 3169300500008 ENDBIB 6 0 3169300500009 NOCOMMON 0 0 3169300500010 DATA 2 1 3169300500011 DATA DATA-ERR 3169300500012 B B 3169300500013 6.47 0.8 3169300500014 ENDDATA 3 0 3169300500015 ENDSUBENT 14 0 3169300599999 ENDENTRY 5 0 3169399999999