1. 133 Xe, 133 Xe m and 133 I decay evaluations CIEMAT M. GALAN

2. 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)

3. SHORT A=133 CHAIN EVALUATED 133 I 133 Xe 133 Cs   133 Xe m I.T.

4. Applications 133 Xe is used in medical studies for: Diagnostic evaluation in pulmonary function. Imaging the lung. Assessment of cerebral blood flow. Fetal risk diagnoses. 133 I, 133 Xe m and 133 Xe are fission products. Xenon isotopes are of particular interest in reactor operation.

5. 133 Xe decay scheme Ensdat file

6. 133 Xe Half-life measurements ReferenceValue (d)Comments 2002UN02, 1992UN01 1975HO18 1975WO10 1974CA27 1974FOZY 1972EM01 1968AL16 1950MA15 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 criterion Mean  2 /N-1 (critical) LWM5,2474 (5)3,32 NRM5,2474 (5)2,37 (95%) RT5,2474 (5) Recommended5,2474 (5)Includes the most precise value T 1/2 (mean) = 5,243 (1) d (1995RA12, from 1975MEZK)  = 0,08%  = 0,07% T 1/2 (mean) = 5,244 (7) d (Lagoutine et al., 1982)

7. 133 Xe Relative gamma emission probabilities 6  -rays emitted in the decay of 133 Xe Energy keV  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)

8. 133 Xe Relative gamma emission probabilities Evaluation: The group I  79,6 +I  81 was considered as the reference line. I  79,6 was deduced using the ratio I  79,6 /I  160,6 from 133 Ba decay evaluation (Chechev and Kuzmenko, 2004): I  160,6 and I  223 averaged from 1968AL16 and 1995MA05. I  303 averaged from 1969ER04, 1968AL16 and 1995MA05.

9. Experimental values for the ratio I  384 /I  303 : Reference I  384 /I  303 1958PL550,50 (11) 1959JH170,512 (13) 1961ER0410,504 (88) 1968AL160,458 (20) 1992MA050,467 (27) LWM0,492  2 /N-1 (crit.) 2,37 Internal uncertainty0,010 External uncertainty0,012 Recommended0,492 (12) 133 Xe Relative gamma emission probabilities I  384 deduced from the 303 keV  -ray emission probability and the averaged I  384 /I  303 ratio :

10. 133 Xe Relative gamma emission probabilities Reference  79,6  81  161  223  303  384 1958PL55----0,0100,005 1959JH17-1001,4-0,0840,043 1961ER040,8 (1)1000,109 (10)0,0004 ( +4 -3 )0,0123 (12)0,0062 (9) 1968AL16100 1,6 (7) 98,2 (59) 0,174 (9)0,000647 (613)0,0135 (4)0,00618 (19) 1992MA051000,242 (25)0,00044 (18)0,0193 (7)0,000901 (41) Weighted average 0,1820,000460,0164  2 /N-1 (crit.) 6,556,66,4 Internal uncertainty 0,0080,000170,0005 External uncertainty 0,0220,000060,0029 Recommended0,76 (9)99,24 (9)0,182 (22)0,00046 (17)0,0164 (29)0,0081 (14)

11. 133 Xe 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%. Checked with GABS: NR = 0,373 (4)

12. 133 Xe Absolute gamma emission probabilities Energy keV 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.

13. 133 Xe 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

14. 133 Xe Beta transitions  energies deduced from the Q value and the level energies in 133 Cs, 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 Naturelg ft  - 0,3 43,6 (24) 0,0097 (12)Allowed6,82  - 0,2 266,8 (24) 0,87 (8)Allowed7,31  - 0,1 346,4 (24)99,12 (8)Allowed5,62

15. 133 Xe 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) TypeIntensity (%) EmissionRadlst 4,29XLXL 5,79 (11) 5,83 (18) 30,625XK2XK2 13,54 (24)13,6 (5) 30,973XK1XK1 25,0 (5)25,0 (9) 35,00XKXK 9,09 (16) 9,1 (3) 3,55Auger-L49,9 (3)49,9 (15) 25,50Auger-K 5,64 (24) 5,63 (19)

16. Comparison with previous evaluations Lagoutine et al. (1982)1995Ra12This evaluation Half-life 1974CA27, 1975HO18, 1975WO10 1975MEZK 1950MA15, 1968AL16, 1974FOZY, 1974CA27, 1975WO10, 1975HO18, 2002UN02 EE 1968AL16, 1981HE15, Imbert et al., LMRI 1981-88 133 Ba e.c. decay2000HE14 II 1961ER04, 1974CA27 (no uncert.), 1977SC31( 133 Ba), Imbert et al., LMRI 1981-88 1983LOZV (Priv. Comm.) 1958PL55, 1959JH17, 1961ER04, 1968AL16, 1992MA05 EE 1961ER04 Q value and level energy (GTOL) Q 1993AU05 2003AU03

17. 133 Xe m decay scheme

18. 133 Xe m Half-life measurements ReferenceValue (days)Comments 1975HO18 1974FOZY 1968AL16 1961ER04 1951BE11 2,19 (5) 2,188 (8) 2,191 (29) 2,26 (2) 2,30 (8) Mean  2 /N-1 (critical) LWM2,198 (13)3,32 NRM2,200 (11)2,37 (95%) RT2,191 (8) Adopted value2,198 (13) T 1/2 (mean) = 2,188 (22) (Lagoutine et al., 1982)  = 0,4%  = 0,5% T 1/2 (mean) = 2,19 (1) (1995RA12)

19. 133 Xe m isomeric transition (1) Different experimental values for the  -ray transition energy: ReferenceValue (keV) 1976ME16233,221 (15) 1972AC02233,2 (4) 1952BE55232,8 (3) 1951BE11232,8 (4)  2 /N-1 (crit.) 2,60 LWM233,219 (15) NRM233,219 (15) RT233,11 (12) Adopted value233,219 (15)

20. 133 Xe m 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 %Pc e = 89,84 (13) % The  k and  L+M+… experimental values together with the theoretical ones are shown in the table: Reference KK  L+M+.. 1954BE554,4 (14)1,9 (6 1968AL167,68 (25)3,8 (3) 1968HA526,37 (9)2,51 (5) 1972AC027,4 (14)2,9 (6) 1978RO226,32 (9)2,69 (4) 2002BA856,24 (9)2,59 (3) 2008PE046,5 (9)2,9 (4)

21. Atomic data from 1996SC06. X-ray and Auger electron emission probabilities from EMISSION code. Results were checked with RADLST code. Differences < 0,6%. 133 Xe m Atomic data Average energy (keV) TypeIntensity (%) EmissionRadlst 4,110XLXL 7,6 (4) 7,60 (22) 29,458 (10)XK2XK2 16,0 (4)16,0 (6) 29,779 (10)XK1XK1 29,7 (6) 29,7 (11) 33,60XKXK 10,64 (24)10,6 (4) 3,43Auger-L 70,4 (10) 70,3 (20) 24,60Auger-K 7,1 (4) 7,1 (3)

22. Comparison with previous evaluations Lagoutine et al. (1982) 1995Ra12This evaluation Half-life 1974FOZY, 1974CA27, 1975HO18 1961ER04, 1968AL16, 1974FOZY, 1975HO18 1951BE11, 1961ER04, 1968AL16, 1974FOZY, 1975HO18 EE 1976ME16 1951BE51, 1952BE55, 1972AC02,1976ME16 ICC 1968HA521978RO222002BA85 Q 1993AU05 2003AU03

23. 133 I decay scheme Ensdat file 11  ’s 47  ’s

24. 133 I Half-life measurements ReferenceValue (h)Comments 1968RE04 1966EI01 1965AN05 1955WA35 1953KA28 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.) LWM20,87 (8)3,78 NRM20,87 (8) 2,60 (95%) RT20,87 (8) Recommended20,87 (8)  = 0,3% T 1/2 (mean) = 20,8 (1) h (1995RA12)

25. 133 I 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.

26. 133 I 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)

27. 133 I 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.

28. 133 I Beta transitions  energies deduced from the Q value and the level energies in 133 Xe. Checked with GTOL. %  -probabilities from  -ray transition intensity balance at each level. Associated uncertainties were obtained using 1988BR07. Log ft from LOGFT code. Beta TransitionAdopted (%)1966EI01 (%)1971SA09 (%)1976ME16 (%)  0,13 0,414 (15)0,5 0,42  0,12 1,25 (4)3,51,11,26  0,11 0,397 (12)0,40,30,4  0,10 3,75 (7)3,72,93,68  0,9 3,12 (6)3,33,23,16  0,8 0,58 (5)0,5 0,62  0,7 0,026 (18)---  0,6 4,16 (13)2,33,54,1  0,5 1,81 (6)-2,31,81  0,3 83,44 (21)85,483,283,5  0,1 1,07 (6)1,4 1,07

29. 133 I 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) TypeIntensity (%) EmissionRadlst 4,11XLXL 0,0653 (13) 0,0656 (18) 29,458 (10)XK2XK2 0,163 (4) 0,163 (7) 29,779 (10)XK1XK1 0,303 (6) 0,303 (13) 33,6XKXK 0,1084 (23) 0,109 (5) 3,430Auger-L 0,607 (4) 0,607 (22) 24,60Auger-K 0,072 (4) 0,072 (3)

30. Comparison with previous evaluations 1995Ra12This evaluation Half-life 1953KA28, 1955WA35, 1965ANo5, 1966EI01, 1968RE04 Same references but 20,87(8) h instead of 20,8 (1)h EE 1976ME161976ME16, 2000HE14 II 1976ME16 EE 1966EI01 Q value and level energy (GTOL) Q 1993AU052003AU03

31. CONCLUSIONS New precise values for 133 Xe, 133 Xe m and 133 I half-lives. 133 Xe: 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 I  are highly recommended.

32. Next evaluations 135m Xe, already finished (submitted for revision) 22 Na 59 Ni 94 Nb Thanks for your attention!

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