ENTRY 21762 20101114 2176200000001
SUBENT 21762001 20101118 20110816 2176200100001
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 20110816 2176200200001
NOSUBENT 21762003 20101118 20110816 2176200300001
NOSUBENT 21762004 20101118 20110816 2176200400001
ENDENTRY 4 0 2176299999999