ENTRY 30652 20050623 31173065200000001 SUBENT 30652001 20050623 31173065200100001 BIB 13 42 3065200100002 TITLE Cross section determination of the (n,a) reactions for 3065200100003 the average weight nuclei in neutron energy region 3065200100004 about 3 MeV by activation analysis method 3065200100005 AUTHOR (G.Helfer,U.Jahn,M.Florek,J.Oravec,I.Sarka) 3065200100006 INSTITUTE (2GERDRE) The first two authors 3065200100007 (3SLKUB )The last three authors. 3065200100008 REFERENCE (J,CZJ/B,34,30,1984) Final data 3065200100009 (C,82SMOLEN,383,1982) 3065200100010 (S,ZFK-459,150,198109) Preliminary data 3065200100011 (C,79SMOLENIC,103,197906) Preliminary results. Only 3065200100012 upper limits of the cross sections are given 3065200100013 MONITOR (49-IN-115(N,INL)49-IN-115-M,,SIG) The decay data which3065200100014 authors used for flux determination are not given 3065200100015 (16-S-32(N,P)15-P-32,,SIG) The decay data and cross 3065200100016 section values which authors used for flux 3065200100017 determination are not given. 3065200100018 Yield of protons from neutron source due to the 3065200100019 associa ted reaction D(d,p)T was used also for neutron 3065200100020 flux determination. 3065200100021 All three methods of neutron flux determination 3065200100022 gave consistent results. 3065200100023 FACILITY Description of the high sensitive and low background 3065200100024 spectrometer is given by M.Florek et al.Physics and 3065200100025 Applications,vol.6,(1980),103. 3065200100026 INC-SOURCE (D-D) Neutron generator of TU Dresden with yield of 3065200100027 5*10**8 neutrons/sec/4pi ster. 3065200100028 METHOD (ACTIV) 3065200100029 INC-SPECT Average energy and energy resolution were calculated 3065200100030 with taking into account the geometry of experiment 3065200100031 DETECTOR (COIN,NAICR,PROPC) Two proportional counters placed 3065200100032 between two scintillation counters 3065200100033 CORRECTION It was found that it is possible to neglect by 3065200100034 contribution from (n,a) reaction caused by 14 MeV 3065200100035 neutrons from T(d,n) reaction from tritium accumulated 3065200100036 at the deuterium target as well as by contribution 3065200100037 from slow neutrons 3065200100038 STATUS Numerical data were taken from the first reference 3065200100039 HISTORY (19830422C) VP. 3065200100040 (19840221A) Numerical data in subentries 2 and 3 were 3065200100041 corrected on those taken from the first reference 3065200100042 (19890717U) VOF- Reference added + inst. code corrected3065200100043 (20040311U) SD:changed to 4-dig. year and lower case 3065200100044 ENDBIB 42 0 3065200100045 COMMON 2 3 3065200100046 EN EN-RSL 3065200100047 MEV MEV 3065200100048 2.96 0.20 3065200100049 ENDCOMMON 3 0 3065200100050 ENDSUBENT 49 0 3065200199999 SUBENT 30652002 20050623 31173065200200001 BIB 3 7 3065200200002 REACTION (31-GA-69(N,A)29-CU-66,,SIG) Upper limit of 3065200200003 the cross section is given in data section due to the 3065200200004 associated (n,g) reaction at the 69Ga and 77Ga 3065200200005 SAMPLE Disc of the natural superpure metallic gallium, 3065200200006 5.cm in diameter and 1.mm in thickness 3065200200007 ERR-ANALYS (DATA-ERR) The main contribution connected with 3065200200008 associated (n,g) reaction at the 69Ga and 71Ga 3065200200009 ENDBIB 7 0 3065200200010 NOCOMMON 0 0 3065200200011 DATA 2 1 3065200200012 DATA DATA-ERR 3065200200013 MICRO-B MICRO-B 3065200200014 7.0000E+01 5.0000E+01 3065200200015 ENDDATA 3 0 3065200200016 ENDSUBENT 15 0 3065200299999 SUBENT 30652003 20050623 31173065200300001 BIB 3 3 3065200300002 REACTION (25-MN-55(N,A)23-V-52,,SIG) 3065200300003 SAMPLE Pieces of equal thickness (100 per-cent of 55Mn) 3065200300004 ERR-ANALYS (ERR-T) Total error 3065200300005 ENDBIB 3 0 3065200300006 NOCOMMON 0 0 3065200300007 DATA 2 1 3065200300008 DATA ERR-T 3065200300009 MICRO-B MICRO-B 3065200300010 7.0000E+00 3.0000E+00 3065200300011 ENDDATA 3 0 3065200300012 ENDSUBENT 11 0 3065200399999 SUBENT 30652004 20050623 31173065200400001 BIB 2 2 3065200400002 REACTION (23-V-51(N,A)21-SC-48,,SIG) 3065200400003 SAMPLE Vanadium in the form of powder (99.75% 51V) 3065200400004 ENDBIB 2 0 3065200400005 NOCOMMON 0 0 3065200400006 DATA 1 1 3065200400007 DATA-APRX 3065200400008 MICRO-B 3065200400009 1.0000E+00 3065200400010 ENDDATA 3 0 3065200400011 ENDSUBENT 10 0 3065200499999 ENDENTRY 4 0 3065299999999