186OS 186IR EC DECAY (1.90 H) 1975YA10 22NDS 202207
186OS H TYP=FUL$AUT=J. C. Batchelder and A. M. Hurst, M. S. Basunia$
186OS2 H CIT=NDS 183, 1 (2022)$CUT=1-Mar-2022$
186OS c Other references: 1990Ed01, 1970FiZZ, 1970ZaZV, 1962Bo22, 1955Sm42.
186OS c The level scheme is that of 1975Ya10.
186OS cE E,IB Measured |b{++} endpoint energies [intensities] are reported
186OS2cE by 1962Bo22 as 3400 {I1}, 2600 {I20}, 1930 {I44}, 1300 {I12},
186OS5cE and 800 {I22} keV.
186OS4cE Presumably, the strong 1930 keV branch feeds the 767 and 910 levels,
186OS5cE and the 2600 keV group feeds the 137 keV level (expected endpoint
186OS6cE energies 2040, 1900 and 2670, respectively). The very
186OS7cE weak 3400 keV group implies Q|>4422, cf. adopted Q=3828 (2021Wa16);
186OS8cE it is unclear whether this represents an impurity or first forbidden
186OS9cE unique g.s. feeding with very large analysis uncertainty.
186OS cE LOGFT Calculated assuming negligible excitation energy for
186OS2cE {+186}Ir parent level (expected E<1.5; see {+186}Ir, adopted levels),
186OS3cE and allowing 5% uncertainty in %|e+ %|b{++}.
186OS cG E(D),RI(D)$E|g from adopted gammas (for known doublet); transition not
186OS2cG observed in this decay. I|g<11 deduced by evaluators assuming adopted
186OS3cG branching for parent level.
186OS cG E(E),RI(E)$In {+186}Ir |e decay (16.64 h), the 713|g is a doublet;
186OS2cG the observed 713|g-773|g and 713|g-767|g coin in {+186}Ir |e decay
186OS3cG (1.90 h) implies that it is a doublet here also. From I(570|g) and
186OS4cG adopted branching, I(713|g)=29 {I10} is expected from the 1480 level
186OS5cG (cf. I|g(doublet)=35 {I3}), leaving I(713|g)=6 {I10} to be
186OS6cG placed from the 1623 level, known from other reaction or decay studies.
186OS cG E(F) Placement of a 1046|g from the 1480 level has not been
186OS2cG confirmed in {+186}Ir |e decay (16.64 h) or (|a,2n|g) studies, even
186OS3cG though its I|g should have been within their detection ranges;
186OS4cG therefore the transition is not included in the adopted
186OS5cG levels.
186OS cG RI(A) |g of similar energy present in {+186}Ir |e decay
186OS2cG (16.64 h); intensity of Ir (1.90 h) component determined by decay
186OS3cG analysis (1975Ya10).
186OS cG M,MR From adopted gammas.
186OS DG CC$FROM BrIcc v2.3b (16-Dec-2014) 2008Ki07, "Frozen Orbitals" appr.
186OS cG MR$If no value given it was assumed |d=1.00 for E2/M1, |d=1.00 for
186OS2cG E3/M2 and |d=0.10 for the other multipolarities
186OS cL E$From a least-squares fit to |g-ray energies.
186OS cL J$From Adopted Levels.
186IR P 0.0+X 2- 1.90 H 5 3828 17
186OS N 0.095 7 0.75 AP1.3333
186OS cN NR$Normalized assuming I(|g+ce)(137+767+1754+2920)=75, i.e. the sum of
186OS2cN the transitions to the ground state = 75%. I(|e+|b{++} to g.s.)=0 is
186OS3cN assumed; a transition from 2{+-} to 0{++} would be a first forbidden
186OS4cN unique transition with a logft of >9, with a corresponding branching
186OS5cN ratio of <0.3%. In addition the positron measurements of 1962Bo22
186OS6cN suggest very little or no g.s. |b{++} feeding. The total unplaced I|g
186OS7cN is about 21%. I|g normalization would become 0.114 {I8} if all unplaced
186OS8cN gammas with E>2000 were to feed the g.s.
186OS cN BR %|e+|b{++}|?75 based on value for %IT of between 20 and
186OS2cN 30 (1991Be25); an uncertainty of 5% has been assumed for the purpose
186OS3cN of calculating |e feeding and log| {Ift} values. This value should
186OS4cN be considered a lower limit due to the uncertainty of the %IT value.
186OS PN 3
186OS G 276.59 6 6.115 A
186OS2 G %IG=0.60 15
186OS cG E|g matches that for known 1629 to 1352 transition.
186OS2cG coincidence data supports this assignment.
186OS G 329.6714 2.0 4
186OS2 G %IG=0.19 4
186OS G 361.5514 4.8 5
186OS2 G %IG=0.46 6
186OS G 384.67 7 9.4 5
186OS2 G %IG=0.89 8
186OS G 685.1311 14.4 12 A
186OS cG E Likely feeds 687 keV state based on coincidence data.
186OS2 G %IG=1.37 15
186OS G 687.4314 12.7 7
186OS2 G %IG=1.21 11
186OS G 783.2014 17.916 A
186OS2 G %IG=1.7 2
186OS G 858.6517 4.9 4
186OS2 G %IG=0.47 5
186OS G 924.1216 6.6 5
186OS2 G %IG=0.63 7
186OS G 952.5 3 3.4 4
186OS2 G %IG=0.32 4
186OS G 1018.7719 4.6 9
186OS2 G %IG=0.44 9
186OS G 1024.5424 4.4 5
186OS2 G %IG=0.42 10
186OS cG $Likely feeds 434 keV state based on coincidence data.
186OS G 1039.1315 7.5 6
186OS2 G %IG=0.71 8
186OS G 1057.2512 5.212 A
186OS2 G %IG=0.49 12
186OS cG $Likely feeds 434 keV state based on coincidence data.
186OS G 1095.5 3 4.510
186OS2 G %IG=0.43 10
186OS G 1114.7025 8.914
186OS2 G %IG=0.85 15
186OS G 1127.1 3 4.410
186OS2 G %IG=0.42 10
186OS G 1316.7 4 9.7 9
186OS2 G %IG=0.92 11
186OS G 1455.2322 7.214
186OS2 G %IG=0.68 14
186OS G 1910.2 4 5.916
186OS2 G %IG=0.56 16
186OS G 2173.2 3 11.917
186OS2 G %IG=1.13 18
186OS G 2186.9520 27 3 A
186OS2 G %IG=2.5 4
186OS G 2207.3 4 3.2 5
186OS2 G %IG=0.30 5
186OS G 2224.1 4 9.713
186OS2 G %IG=0.92 14
186OS G 2275.8 3 4.2 7
186OS2 G %IG=0.40 7
186OS G 2472.0823 5.310
186OS2 G %IG=0.50 10
186OS G 2508.8 3 4.5 9
186OS2 G %IG=0.43 9
186OS G 2517.4 3 3.2 8
186OS2 G %IG=0.30 8
186OS G 2725.1 3 3.7 7
186OS2 G %IG=0.35 7
186OS G 2793.1 4 3.6 6
186OS2 G %IG=0.34 6
186OS G 2797.8 4 3.1 5
186OS2 G %IG=0.29 5
186OS G 2904.7 3 7.111
186OS2 G %IG=0.67 12
186OS L 0.0 0+ 2.0E+15 Y 11
186OS cL T From Adopted Levels.
186OS L 137.14 3 2+ 868 PS 12
186OS cL T From Adopted Levels.
186OS E 3.7 LE 10 LE 7.3 GE 14 LE
186OSS E EAV=1206 9 $CK=0.605 4 $CL=0.1014 7 $CM+=0.03170 20
186OS G 137.14 3 24124E2 1.271 A
186OS2 G %IG=52 6
186OSS G KC=0.434 6$LC=0.632 9$MC=0.1611 23
186OSS G NC=0.0386 6$OC=0.00575 8$PC=3.96E-5 6
186OS L 434.10 6 4+
186OS E 0.42 11 5.2 14 9.15 12 6.4 15 1U
186OSS E EAV=1063 9 $CK=0.7517 16 $CL=0.1313 4 $CM+=0.04135 11
186OS G 296.93 5 9012E2 0.0942 A
186OS2 G %IG=9.4 4
186OSS G KC=0.0606 9$LC=0.0255 4$MC=0.00631 9
186OSS G NC=0.001522 22$OC=0.000236 4$PC=6.08E-6 9
186OS L 767.44 6 2+
186OS E 2.2 4 14 3 7.00 9 19 3
186OSS E EAV=924 9 $CK=0.708 3 $CL=0.1195 6 $CM+=0.03741 17
186OS G 630.32 8 16413M1+E2 -13.7 +17-230.01330 A
186OS2 G %IG=15.8 17
186OSS G KC=0.01040 15$LC=0.00223 4$MC=0.000528 8
186OSS G NC=0.0001280 18$OC=2.11E-5 3$PC=1.115E-6 16
186OS G 767.46 10 19316E2 0.00856 A
186OS2 G %IG=18.5 21
186OSS G KC=0.00684 10$LC=0.001323 19$MC=0.000310 5
186OSS G NC=7.53E-5 11$OC=1.254E-5 18$PC=7.34E-7 11
186OS L 910.40 7 3+
186OS E 0.75 18 6.0 14 7.32 11 5.8 12
186OSS E EAV=861 9 $CK=0.728 3 $CL=0.1230 5 $CM+=0.03854 16
186OS G 476.26 14 7.312E2+M1 -22 10 0.0258 5
186OS2 G %IG=0.71 13
186OSS G KC=0.0192 4$LC=0.00504 8$MC=0.001212 18
186OSS G NC=0.000293 5$OC=4.73E-5 7$PC=2.04E-6 4
186OS G 773.24 10 12311M1+E2 -60 +12-200.00842 A
186OS2 G %IG=11.7 14
186OSS G KC=0.00674 10$LC=0.001298 19$MC=0.000304 5
186OSS G NC=7.39E-5 11$OC=1.231E-5 18$PC=7.23E-7 11
186OS L 1070.45 7 4+
186OS E 0.058 16 2.1 6 9.17 12 2.0 6 1U
186OSS E EAV=791 9 $CK=0.7890 $CL=0.14031 24 $CM+=0.04432 8
186OS G 636.32 9 17 5M1+E2 +24 +26-8 0.01294 A
186OS2 G %IG=1.6 5
186OSS G KC=0.01012 15$LC=0.00216 3$MC=0.000512 8
186OSS G NC=0.0001242 18$OC=2.04E-5 3$PC=1.084E-6 16
186OS G 933.40 10 17.9 23E2 0.00570 A
186OS2 G %IG=1.7 3
186OSS G KC=0.00463 7$LC=0.000825 12$MC=0.000192 3
186OSS G NC=4.66E-5 7$OC=7.84E-6 11$PC=4.97E-7 7
186OS L 1351.88 8 4+
186OS E 0.010 6 0.7 4 9.47 25 0.7 4 1U
186OSS E EAV=672 9 $CK=0.7974 $CL=0.14338 21 $CM+=0.04537 8
186OS G 281.50 11 0.17 6(E2) 0.1107 D S
186OS2 G %IG=0.07
186OSS G KC=0.0695 10$LC=0.0312 5$MC=0.00775 11
186OSS G NC=0.00187 3$OC=0.000289 4$PC=6.91E-6 10
186OS G 441.48 11 3.625M1+E2 +13.3 +22-170.0315 A
186OS2 G %IG=0.35 15
186OSS G KC=0.0231 4$LC=0.00642 9$MC=0.001552 22
186OSS G NC=0.000376 6$OC=6.02E-5 9$PC=2.44E-6 4
186OS G 584.44 10 10.020E2 0.01568 A
186OS2 G %IG=0.97 21
186OSS G KC=0.01211 17$LC=0.00274 4$MC=0.000650 10
186OSS G NC=0.0001577 22$OC=2.58E-5 4$PC=1.294E-6 19
186OS L 1480.02 9 (3)-
186OS E 0.23 5 5.9 13 7.14 10 4.6 11
186OSS E EAV=609 9 $CK=0.7858 15 $CL=0.1343 3 $CM+=0.04213 10
186OS G 409.6022 6.5 6 A
186OS2 G %IG=0.62 7
186OS G 569.63 12 13.118E1 0.00582 A
186OS2 G %IG=1.2 2
186OSS G KC=0.00488 7$LC=0.000730 11$MC=0.0001658 24
186OSS G NC=4.03E-5 6$OC=6.86E-6 10$PC=4.81E-7 7
186OS G 712.57 10 29 10[E1] 0.00370
186OS2 G %IG=3.3 4
186OSF G FLAG=AE
186OSS G KC=0.00311 5$LC=0.000458 7$MC=0.0001039 15
186OSS G NC=2.52E-5 4$OC=4.32E-6 6$PC=3.10E-7 5
186OS G 1046.26 16 9.3 8 F ?
186OS2 G %IG=0.88 10
186OS cG E $ not adopted. See general comments.
186OS L 1640.75 12
186OS E 0.029 4 1.13 14 7.79 7 1.1612
186OSS E EAV=539 9 $CK=0.7958 11 $CL=0.1365 3 $CM+=0.04287 9
186OS G 730.3517 5.5 6 A
186OS2 G %IG=0.52 7
186OS G 873.3214 6.7 5
186OS2 G %IG=0.64 7
186OS L 1653.51 12 2+,3,4+
186OS E 0.037 6 1.51 21 7.66 7 1.55 21
186OSS E EAV=533 9 $CK=0.7965 11 $CL=0.1367 3 $CM+=0.04292 9
186OS G 301.8720 6.212 A
186OS2 G %IG=0.59 12
186OS G 742.9914 6.1 4
186OS2 G %IG=0.58 6
186OS G 886.1 3 4.011
186OS2 G %IG=0.38 11
186OS L 1754.45 8 2(+)
186OS cL J=2 from 1754|g(|q,H,T) (1990Ed01).
186OS E 0.33 4 18.6 20 6.53 6 18.9 16
186OSS E EAV=489 9 $CK=0.8013 9 $CL=0.13791 23 $CM+=0.04332 8
186OS cE From 1754|g(|q,H,T) (1990Ed01), |b transition is |?35% L=0,
186OS2cE |?65% L=1 if J=2 for Ir parent.
186OS G 844.0811 21.612
186OS2 G %IG=2.05 19
186OS G 987.0310 100
186OS2 G %IG=9.5 7
186OS G 1617.2115 38 4
186OS2 G %IG=3.6 5
186OS G 1754.4 3 42 4
186OS2 G %IG=4.0 5
186OS L 1848.38 9 2+,3
186OS E 0.065 9 5.0 6 7.05 6 5.1 5
186OSS E EAV=447 9 $CK=0.8048 $CL=0.13891 21 $CM+=0.04366 7
186OS G 777.8522 7.5 6
186OS2 G %IG=0.71 8
186OS G 938.0012 20.513
186OS2 G %IG=1.95 19
186OS G 1081.2624 9.1 7
186OS2 G %IG=0.86 9
186OS G 1414.0622 6.1 8
186OS2 G %IG=0.58 9
186OS G 1711.1318 18.419
186OS2 G %IG=1.75 22
186OS L 2919.85 16 1,2+
186OS E 1.31 16 6.93 7 1.31 16
186OSS E CK=0.8026 $CL=0.1497 4 $CM+=0.04762 15
186OS G 1071.4017 8.1 7
186OS2 G %IG=0.77 9
186OS G 1165.4 3 3.5 9
186OS2 G %IG=0.33 9
186OS G 2920.2 4 2.2 4
186OS2 G %IG=0.21 4