ENTRY 21762 20101118 22252176200000001 SUBENT 21762001 20101118 22252176200100001 BIB 15 74 2176200100002 INSTITUTE (2GERJUL) experimental site and first two authors 2176200100003 (2ZZZGEL) third author 2176200100004 REFERENCE (J,PR/C,25,(1),203,198201) 2176200100005 (W,QAIM,19811104) 2176200100006 (P,INDC(EUR)-13,23,198006) 2176200100007 AUTHOR (S.M.Qaim,R.Wolfe,H.Liskien) 2176200100008 TITLE -excitation functions of (n,t) reactions on 2176200100009 Al-27, Co-59, and Nb-93. 2176200100010 FACILITY (VDG,2ZZZGEL) 2176200100011 INC-SOURCE (D-T ) water-cooled Ti(T) layer about 2mg/cm2 thick 2176200100012 on a 0.3 mm silver backing. Van der Graaff generated 2176200100013 3 MeV deuterons at a current of 50 microamps. 2176200100014 METHOD (ACTIV) compact hemispherical geometry of three 2176200100015 or four sample segments around the neutron 2176200100016 source. Each segment covered an angular 2176200100017 range with corresponding incident neutron energy 2176200100018 range. Sample enclosed in aluminium capsule to 2176200100019 prevent contamination with tritium from neutron 2176200100020 source. 2176200100021 .Samples irradiated for about 50 hours. 2176200100022 .After irradiation the accumulated tritium was 2176200100023 separated by vacuum extraction in hydrogen atmosphere,2176200100024 and the activity measured by low level beta minus 2176200100025 anticoincidence counting in the gas phase. 2176200100026 .Gas counting system efficiency determined by using 2176200100027 tritium gas standards. 2176200100028 (MOMIX) 2176200100029 .Neutron flux, averaged over each segment, was 2176200100030 measured using internal standards based on 2176200100031 gamma active isotopes produced by the irradiation. 2176200100032 gamma activity measured with Ge(Li) detectors. 2176200100033 .Neutron flux measurements checked using an external 2176200100034 proton recoil telescope in 130 degree direction 2176200100035 80 cm from neutron source, and activity measurements 2176200100036 of an external piece of cobalt at zero degrees 25 cm 2176200100037 from source. These techniques were less accurate 2176200100038 because geometry of system was not well known. 2176200100039 DETECTOR (PROPC) gas phase tritium activity 2176200100040 (GELI ) gamma activity of internal standards used 2176200100041 for neutron flux determination 2176200100042 (TELES) proton recoil telescope to monitor 2176200100043 neutron flux. 2176200100044 PART-DET (B- ) 2176200100045 (DG ) 2176200100046 DECAY-DATA (1-H-3,12.35YR) 2176200100047 ADD-RES (COMP) .Results compared with excitation functions 2176200100048 obtained from Hauser-Feshbach calculations. Good 2176200100049 agreement only for Al. For the other two isotopes 2176200100050 calculated cross sections were too low. 2176200100051 STATUS (TABLE) .Data taken from private comm. 2176200100052 CORRECTION .Neutron scatter from target cooling water and 2176200100053 from aluminium capsule estimated using Monte-Carlo 2176200100054 calculations, neglecting multiple scattering. 2176200100055 4 to 6% of neutrons were calculated to have 2176200100056 energies outside the range of the unscattered flux. 2176200100057 .Detector efficiencies. 2176200100058 ERR-ANALYS (ERR-1) systematic error in tritium activity 2176200100059 measurements 2176200100060 (ERR-2) error in tritium extraction efficiency 2176200100061 (ERR-3) systematic error in gamma activity 2176200100062 measurements 2176200100063 (ERR-S) total uncorrelated error, computed from 2176200100064 quadratic sum of typical values for the 2176200100065 random part of the counting errors. 2176200100066 HISTORY (19820119C) A.P.T. 2176200100067 (19820217E) 2176200100068 (19860227U)N.Ch 2176200100069 (19860411E) 2176200100070 (20101114A) SD:Updated to new date formats,lower case. 2176200100071 corrected according to last EXFOR rules and Dict. 2176200100072 Ref. on Phys.Ref.C 25,(1),203,1982 added. 2176200100073 Entry deleted. Duplication with 21837 2176200100074 (20101201A) SD: Col.HL deleted. Information is given 2176200100075 in DECAY-DATA 2176200100076 ENDBIB 74 0 2176200100077 COMMON 4 3 2176200100078 ERR-1 ERR-2 ERR-3 ERR-S 2176200100079 PER-CENT PER-CENT PER-CENT PER-CENT 2176200100080 4.0000E+00 2.0000E+00 3.0000E+00 2.5000E+00 2176200100081 ENDCOMMON 3 0 2176200100082 ENDSUBENT 81 0 2176200199999 NOSUBENT 21762002 20101118 22252176200200001 NOSUBENT 21762003 20101118 22252176200300001 NOSUBENT 21762004 20101118 22252176200400001 ENDENTRY 4 0 2176299999999