ENTRY 30351 20091116 31433035100000001
SUBENT 30351001 20091116 31433035100100001
BIB 14 40 3035100100002
TITLE Determination of isomer cross-section ratio for (n,g) 3035100100003
reaction on Te-120 using a radiochemical method. 3035100100004
AUTHOR (M.Jimenez,C.Archundia,S.Bulbulian) 3035100100005
INSTITUTE (3MEXINI) 3035100100006
(3MEXMEX) Centro de Estudios Nucleares, Ciudad Univ. 3035100100007
REFERENCE (J,RRL,25,327,197605) 3035100100008
FACILITY (REAC,3MEXINI) 3035100100009
INC-SOURCE (REAC) Triga Mark III reactor of Nuclear Center, Sazar 3035100100010
INC-SPECT Irradiation time of about 6 hours with an approximate 3035100100011
neutron flux of 2. X 10.**12 n/cm2/sec. 3035100100012
SAMPLE Natural 99% purity metallic tellurium, 20 gram. 3035100100013
METHOD (ACTIV) Activation. 3035100100014
Author's note: Since chemical changes occuring in 3035100100015
molecules where an atom is affected by an internally 3035100100016
converted isomeric transition can be detected, it is 3035100100017
possible to use the difference in the oxidation 3035100100018
state of the metastable and ground state isomers in 3035100100019
order to obtain its separation and therefore, an 3035100100020
indirect measurement of activation cross-section 3035100100021
ratio. 3035100100022
Chemical oxidation of the radioactive materials (such 3035100100023
as Te-121m and Te-121g) to telluric acid gives 3035100100024
'hexavalent' tellurium in both metastable and ground 3035100100025
state species, whereas isomeric transition produces 3035100100026
'tetravalent' ground state species. = 3035100100027
DETECTOR (GELI) Ge(Li) detector. 3035100100028
PART-DET (DG) Decay gammas. 3035100100029
COMMENT Equal aliquot of the original telluric acid solution, 3035100100030
which contained the equilibrium amount of Te-121 3035100100031
ground state isomer was used as the standard of 3035100100032
analysis. 3035100100033
STATUS (TABLE) Radiochem.Radioanal.Letters,25(5/6)(1976)327. 3035100100034
(APRVD) Approved by Archundia, with his remark on 3035100100035
'comment', 1977/02/15. 3035100100036
HISTORY (19760921C) KO. 3035100100037
(19770324U) KO. -'Approved' added.Insertion of comment 3035100100038
amendment after memo 4C-1/111 (data heading 'data' to 3035100100039
'ratio' in sub-entry .002.- 3035100100040
(20090115A) BIB section updated 3035100100041
(20091116U) On. 3MEXCNM -> 3MEXINI and 3MEXMEX added 3035100100042
ENDBIB 40 0 3035100100043
NOCOMMON 0 0 3035100100044
ENDSUBENT 43 0 3035100199999
SUBENT 30351002 20090115 31343035100200001
BIB 3 5 3035100200002
REACTION (52-TE-120(N,G)52-TE-121-M/G,,SIG/RAT,,SPA) 3035100200003
DECAY-DATA (52-TE-121-M1,150.D) 3035100200004
(52-TE-121-G,17.D) 3035100200005
ERR-ANALYS (DATA-ERR) Relative deviation from the mean value of 3035100200006
a set of several identical experiments. 3035100200007
ENDBIB 5 0 3035100200008
NOCOMMON 0 0 3035100200009
DATA 3 1 3035100200010
EN-DUMMY DATA DATA-ERR 3035100200011
EV NO-DIM NO-DIM 3035100200012
2.5300E-02 9.2000E+00 1.7000E+00 3035100200013
ENDDATA 3 0 3035100200014
ENDSUBENT 13 0 3035100299999
ENDENTRY 2 0 3035199999999