133Xe, 133Xem and 133I decay evaluations
CIEMATM. GALAN
SUMMARY
Evaluation procedure
DECAY SCHEME AND APPLICATIONS
HALF-LIFE MEASUREMENTS
RELATIVE GAMMA-RAY PROBABILITIES
NORMALIZATION AND ABSOLUTE GAMMA-RAY PROBABILITIES
GAMMA TRANSITIONS AND MULTIPOLARITIES
BETA TRANSITION PROBABILITIES
ATOMIC DATA
SECONDARY EMISSIONS (X-RAY AND AUGER ELECTRON PROBABILITIES)
SHORT A=133 CHAIN EVALUATED
133I
133Xe
133Cs
133Xem
I.T.
Applications
133Xe is used in medical studies for: Diagnostic evaluation in pulmonary
function. Imaging the lung. Assessment of cerebral blood flow. Fetal risk diagnoses.
133I, 133Xem and 133Xe are fission products. Xenon isotopes are of particular interest in reactor operation.
133Xe decay scheme
Ensdat file
133Xe Half-life measurements
Reference Value (d) Comments
2002UN02, 1992UN011975HO181975WO101974CA271974FOZY1972EM011968AL161950MA15
5,2475 (5)5,25 (2)
5,250 (13)5,245 (6)5,240 (6)5,29 (1)
5,312 (25)5,270 (2)
Rejected by Chauvenet’s criterionRejected by Chauvenet’s criterionRejected by Chauvenet’s criterion
Mean 2/N-1 (critical)
LWM 5,2474 (5) 3,32
NRM 5,2474 (5) 2,37 (95%)
RT 5,2474 (5)
Recommended 5,2474 (5) Includes the most precise value
T1/2 (mean) = 5,243 (1) d (1995RA12, from 1975MEZK)
= 0,08%
= 0,07%T1/2 (mean) = 5,244 (7) d (Lagoutine et al., 1982)
133Xe Relative gamma emission probabilities
6 -rays emitted in the decay of 133Xe
EnergykeV
2,1(Cs) 79,6142 (12)
1,0(Cs) 80,9979 (11)
2,0(Cs) 160,6120 (16)
3,2(Cs) 223,2368 (18)
3,1(Cs) 302,8508 (5)
3,0(Cs) 383,8485 (12)
133Xe Relative gamma emission probabilities
Evaluation:
• The group I79,6+I81 was considered as the reference line.
• I79,6 was deduced using the ratio I79,6/I160,6 from 133Ba decay evaluation
(Chechev and Kuzmenko, 2004):
)%9(76,0)8(028,1
)8(27,4)22(182,0
6,160
6,796,1606,79
BaXe I
III
)%9(24,99)9(76,010081 I
• I160,6 and I223 averaged from 1968AL16 and 1995MA05.
• I303 averaged from 1969ER04, 1968AL16 and 1995MA05.
• Experimental values for the ratio I384/I303:
Reference I384/I303
1958PL55 0,50 (11)
1959JH17 0,512 (13)
1961ER041 0,504 (88)
1968AL16 0,458 (20)
1992MA05 0,467 (27)
LWM 0,492
2 /N-1 (crit.) 2,37
Internal uncertainty 0,010
External uncertainty 0,012
Recommended 0,492 (12)
)14(0081,0)12(492,0)29(0164,0303
384303384
LWMI
III
133Xe Relative gamma emission probabilities
• I384 deduced from the 303 keV -ray emission probability and the averaged I384/I303 ratio :
133Xe Relative gamma emission probabilities
Reference 79,6 81 161 223 303 384
1958PL55 - - - - 0,010 0,005
1959JH17 - 100 1,4 - 0,084 0,043
1961ER04 0,8 (1) 100 0,109 (10) 0,0004 (+4-3) 0,0123 (12) 0,0062 (9)
1968AL16 1001,6 (7) 98,2 (59)
0,174 (9) 0,000647 (613) 0,0135 (4) 0,00618 (19)
1992MA05 100 0,242 (25) 0,00044 (18) 0,0193 (7) 0,000901 (41)
Weighted average
0,182 0,00046 0,0164
2/N-1 (crit.) 6,55 6,6 6,4
Internal uncertainty
0,008 0,00017 0,0005
External uncertainty
0,022 0,00006 0,0029
Recommended 0,76 (9) 99,24 (9) 0,182 (22) 0,00046 (17) 0,0164 (29) 0,0081 (14)
133Xe Normalization
• Normalization factor was deduced from the decay scheme considering no direct feeding to the g.s.
• ICCs from BrIcc computer code (2002BA85). Associated uncertainties are
1,4%.
)3(373,0)3(0202,01)14(0081,0)5(294,01)22(182,0)24(698,11)9(24,99
100
N
• Checked with GABS: NR = 0,373 (4)
133Xe Absolute gamma emission probabilities
EnergykeV
Photons per 100 disintegrations
2,1(Cs) 79,6142 (12) 0,28 (3)
1,0(Cs) 80,9979 (11) 37,0 (3)
2,0(Cs) 160,6120 (16) 0,068 (8)
3,2(Cs) 223,2368 (18) 0,00017 (6)
3,1(Cs) 302,8508 (5) 0,0061 (11)
3,0(Cs) 383,8485 (12) 0,0030(5)
• E and uncertainties from 2000HE14.
• Absolute -ray probabilities uncertainties calculated from 1986BR21.
133Xe Gamma transitions and multipolarites
• Gamma-ray transition probabilities deduced from %I and the adopted ICC.
• Multipolarities: evaluated by 1977KR13 from experimental angular correlation
data.
80 from 1995RA12 from (exp), penetration parameter (M1)= 4(4).
-ray energy Multipolarity
79,6142 (12) 0,124 (15) M1+1,54%E2
80,9979 (11) -0,151 (2) M1+2,28%E2
160,6120 (16) +0,96 (5) M1+92,2%E2
223,2368 (18) -0,114 (14) M1+1,3%E2
302,8508 (5) +0,022 (20) M1+0,05%E2
383,8485 (12) E2
133Xe Beta transitions
• energies deduced from the Q value and the level energies in 133Cs, the later
deduce from -ray energies (2000HE14). The adopted level energies values
were checked with GTOL computer code.
• All -transition are allowed. Log ft values were obtained with LOGFT code.
• %-probabilities were deduced from -ray transition intensity balance at each
level. Associated uncertainties were obtained using reference 1988BR07.
Energy keV
Probability × 100
Nature lg ft
-0,3 43,6 (24) 0,0097 (12) Allowed 6,82
-0,2 266,8 (24) 0,87 (8) Allowed 7,31
-0,1 346,4 (24) 99,12 (8) Allowed 5,62
133Xe Atomic data and secondary emissions
• Atomic data from 1996SC06.
• X-ray and Auger electron emission probabilities from EMISSION
code. Results were checked with RADLST code. Differences < 1%.
Average energy (keV)
Type Intensity (%)
Emission Radlst
4,29 XL 5,79 (11) 5,83 (18)
30,625 XK2 13,54 (24) 13,6 (5)
30,973 XK1 25,0 (5) 25,0 (9)
35,00 XK 9,09 (16) 9,1 (3)
3,55 Auger-L 49,9 (3) 49,9 (15)
25,50 Auger-K 5,64 (24) 5,63 (19)
Comparison with previous evaluations
Lagoutine et al. (1982) 1995Ra12 This evaluation
Half-life 1974CA27, 1975HO18, 1975WO10
1975MEZK
1950MA15, 1968AL16, 1974FOZY, 1974CA27, 1975WO10, 1975HO18,
2002UN02
E1968AL16, 1981HE15, Imbert et
al., LMRI 1981-88133Ba e.c. decay 2000HE14
I1961ER04, 1974CA27 (no uncert.), 1977SC31(133Ba), Imbert et al., LMRI 1981-88
1983LOZV (Priv. Comm.)1958PL55, 1959JH17, 1961ER04, 1968AL16,
1992MA05
E 1961ER04Q value and level energy
(GTOL)
Q 1993AU05 1993AU05 2003AU03
133Xem decay scheme
133Xem Half-life measurements
Reference Value (days) Comments
1975HO181974FOZY1968AL161961ER041951BE11
2,19 (5)2,188 (8)2,191 (29)2,26 (2)2,30 (8)
Mean 2/N-1 (critical)
LWM 2,198 (13) 3,32
NRM 2,200 (11) 2,37 (95%)
RT 2,191 (8)
Adopted value 2,198 (13)
T1/2 (mean) = 2,188 (22) (Lagoutine et al., 1982)
= 0,4%
= 0,5%
T1/2 (mean) = 2,19 (1) (1995RA12)
133Xem isomeric transition (1)
• Different experimental values for the -ray transition energy:
Reference Value (keV)
1976ME16 233,221 (15)
1972AC02 233,2 (4)
1952BE55 232,8 (3)
1951BE11 232,8 (4)
2/N-1 (crit.) 2,60
LWM 233,219 (15)
NRM 233,219 (15)
RT 233,11 (12)
Adopted value 233,219 (15)
133Xem isomeric transition (2)
• ICCs from BrIcc computer code (2002BA85).
• %I = 100 / (1 + T) = 100 / [1 + 8,84 (13)] = 10,16 (13) %.
• P+ce = 100 % and %Pce = 89,84 (13) %
• The k and L+M+… experimental values together with the theoretical ones are shown in the
table:
Reference K L+M+..
1954BE55 4,4 (14) 1,9 (6
1968AL16 7,68 (25) 3,8 (3)
1968HA52 6,37 (9) 2,51 (5)
1972AC02 7,4 (14) 2,9 (6)
1978RO22 6,32 (9) 2,69 (4)
2002BA85 6,24 (9) 2,59 (3)
2008PE04 6,5 (9) 2,9 (4)
• Atomic data from 1996SC06.
• X-ray and Auger electron emission probabilities from EMISSION code.
Results were checked with RADLST code. Differences < 0,6%.
133Xem Atomic data
Average energy (keV)
Type Intensity (%)
Emission Radlst
4,110 XL 7,6 (4) 7,60 (22)
29,458 (10) XK2 16,0 (4) 16,0 (6)
29,779 (10) XK1 29,7 (6) 29,7 (11)
33,60 XK 10,64 (24)
10,6 (4)
3,43 Auger-L 70,4 (10) 70,3 (20)
24,60 Auger-K 7,1 (4) 7,1 (3)
Comparison with previous evaluations
Lagoutine et al. (1982)
1995Ra12 This evaluation
Half-life 1974FOZY, 1974CA27, 1975HO18
1961ER04, 1968AL16, 1974FOZY, 1975HO18
1951BE11, 1961ER04, 1968AL16, 1974FOZY,
1975HO18
E 1976ME16 1976ME161951BE51, 1952BE55, 1972AC02,1976ME16
ICC 1968HA52 1978RO22 2002BA85
Q 1993AU05 1993AU05 2003AU03
133I decay scheme
Ensdat file
11 ’s
47 ’s
133I Half-life measurements
Reference Value (h) Comments
1968RE041966EI011965AN051955WA351953KA28
20,9 (1)20,8 (2)20,3 (3)20,9 (3)20,8 (2)
Rejected by Chauvenet’s criterion
Mean 2/N-1 (crit.)
LWM 20,87 (8) 3,78
NRM 20,87 (8) 2,60 (95%)
RT 20,87 (8)
Recommended 20,87 (8)
= 0,3%T1/2 (mean) = 20,8 (1) h
(1995RA12)
133I Relative gamma emission probabilities
• Values are from 1976ME16. A 2% was increased in the uncertainty to account for uncertainty calibration as cited in this reference.
• Other experimental values: 1974KO26, but not used because detailed
information about detector calibration, experimental conditions, sample
preparation, calculation and uncertainties estimations is absent.
133I Normalization
• Normalization factor was deduced from the decay scheme considering no direct feeding to the g.s.
• ICCs from BrIcc computer code (2002BA85). P+ce(233keV) from 1976ME16.
• Checked with GABS: NR = 0,0863 (16)
)16(0863,01
)233(100
iiT
ce
iI
keVPN
133I Gamma transitions and multipolarites
• Gamma-ray transition probabilities deduced from %I and the adopted ICC.
• No experimental measurements of conversion coefficients (except for the
233-keV line) have been found in the bibliography.
• Multipolarities: from 1977KR13 or from 1974KO26.
133I Beta transitions
• energies deduced from the Q value and the level energies in 133Xe. Checked with GTOL. • %-probabilities from -ray transition intensity balance at each level. Associated uncertainties were obtained using 1988BR07. Log ft from LOGFT code.
Beta Transition Adopted (%) 1966EI01 (%) 1971SA09 (%) 1976ME16 (%)
0,13 0,414 (15) 0,5 0,5 0,42
0,12 1,25 (4) 3,5 1,1 1,26
0,11 0,397 (12) 0,4 0,3 0,4
0,10 3,75 (7) 3,7 2,9 3,68
0,9 3,12 (6) 3,3 3,2 3,16
0,8 0,58 (5) 0,5 0,5 0,62
0,7 0,026 (18) - - -
0,6 4,16 (13) 2,3 3,5 4,1
0,5 1,81 (6) - 2,3 1,81
0,3 83,44 (21) 85,4 83,2 83,5
0,1 1,07 (6) 1,4 1,4 1,07
133I Atomic data and secondary emissions
• Atomic data from 1996SC06.
• X-ray and Auger electron emission probabilities from EMISSION code.
Results were checked with RADLST. Differences < 0,6%.
Average energy (keV)
Type Intensity (%)
Emission Radlst
4,11 XL 0,0653 (13) 0,0656 (18)
29,458 (10) XK2 0,163 (4) 0,163 (7)
29,779 (10) XK1 0,303 (6) 0,303 (13)
33,6 XK 0,1084 (23) 0,109 (5)
3,430 Auger-L 0,607 (4) 0,607 (22)
24,60 Auger-K 0,072 (4) 0,072 (3)
Comparison with previous evaluations
1995Ra12 This evaluation
Half-life1953KA28, 1955WA35, 1965ANo5, 1966EI01,
1968RE04
Same references but 20,87(8) h instead of
20,8 (1)h
E 1976ME16 1976ME16, 2000HE14
I 1976ME16 1976ME16
E 1966EI01Q value and level energy
(GTOL)
Q 1993AU05 2003AU03
CONCLUSIONS
• New precise values for 133Xe, 133Xem and 133I half-lives.
• 133Xe: I from 1992MA05 values not were considered in previous evaluations.
• Recalculated %I using interpolated ICC from 2002BA85.
• Recent E from 2000HE14.
• Recalculated E and %
• New measurements of the half-lives and Iare highly recommended.
Next evaluations
• 135mXe, already finished (submitted for revision)
• 22Na
• 59Ni
• 94Nb
Thanks for your attention!
Bibliography I
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