153EU 153GD EC DECAY 20NDS 202012
153EU H TYP=FUL$AUT=N. NICA$CIT=NDS 170, 1 (2020)$CUT=16-Aug-2020$
153EU c The decay scheme and useful I{|g} data are given by 1964Al09,
153EU2c 1964Ew04, 1974Se08, 1981Gr19, 1985Si03, 1988Ve05, 1988Su13,
153EU3c 1992Ch16, 1992Ch44, 1993Eg05, and 1995Ku34. Level T{-1/2}
153EU4c are given by: 1965Me08, 1968Ma15, 1975Si07, 1978AnZP, and
153EU5c 1986Sa34. Other measurements include: 1996La21, 1994Co02,
153EU6c 1994MiZZ, 1992EgZY (see 1993Eg05), 1990GeZZ, 1989Po21, 1986Va16,
153EU7c 1980Se01, 1980BeYK, 1976Gu02, 1975Ba69, 1974Ma27, 1972De67,
153EU8c 1971Kr19, 1970Me26, 1967Bo11, 1964Cr08, 1962Bl11, 1962Bh01,
153EU9c 1961Gr39, 1960Su08, 1960Le06, 1958An34, 1954Mc10, 1949Ke01.
153EU d For an independent evaluation of these decay data see
153EU2d 1992Ch16.
153EU c The magnitude of possible combined electron-nuclear radiation (CENR)
153EU2c is discussed in 1994Al45 and 1995Sa56.
153EU cG The internal conversion electron intensities are
153EU2cG normalized to give |a{-K}(exp)(97.43)=0.258 (E1 theory).
153EU cG I{-Kx|a}=327 {I6} and I{-K|b}=82.6 {I14}. The reduced-|h{+2}
153EU2cG values for these averages are 4.8 and 6.3, respectively. See
153EU3cG 1992Ch16, 1993Eg05, and 1995Ku34 for values for components of
153EU4cG these two groups. The corresponding values calculated from the
153EU5cG decay scheme are 333 {I8} and 84.8 {I24}, respectively.
153EU cG E From 2000He14 E|g evaluation with additions of values
153EU2cG from {+152}Eu(n,|g); all are on the energy scale for which
153EU3cG the strong {+198}Au line is 411.80205 {I17} keV.
153EU cG RI From weighted average of values from 1974Se08, 1985Si03
153EU2cG (values for photons below 60 keV omitted), 1988Su13, 1988Ve05,
153EU3cG 1992Ch16, 1992Ch44, 1993Eg05, 1995Ku34, 2017ShZX. Significant
153EU4cG discrepancies between these values are noted. Others: 1964Al09,
153EU5cG 1964Ew04, 1967Bo11, 1981Gr19, 1990GeZZ, and 1996La21.
153EU cG MR From {+153}Eu Adopted Gammas.
153EU cG E(S) From {+152}Eu(n,|g).
153EU cL E From least-squares fit to measured E|g.
153EU cL J From {+153}Eu Adopted Levels.
153EU cL T Values are from {+153}Gd decay only; see {+153}Eu Adopted
153EU2cL Levels for values from other production modes.
153EU DG CC$FROM BrIcc v2.3b (16-Dec-2014) 2008Ki07, "Frozen Orbitals" appr.
153EU CG MR$IF NO VALUE GIVEN IT WAS ASSUMED MR=1.00 FOR E2/M1,
153EU2CG MR=1.00 FOR E3/M2 AND MR=0.10 FOR THE OTHER MULTIPOLARITIES
153GD P 0.0 3/2- 240.4 D 10 484.7 7
153GD cP QP Earlier a series of measurements of the K-capture
153GD2cP probability to the 172-keV level of {+153}Eu (1960Le06, 1962Bl11,
153GD3cP 1964Cr08,1967Bo11,1980Se01,1985Si03) indicated a decay energy of
153GD4cP 235 to 280 keV. The problem with these measurements, or the
153GD5cP or the interpretation thereof, has not been resolved.
153EU N 0.300 3 0.300 3 1.0 1.0
153EU cN NR$Weighted average of: 0.3015 {I20} (2017ShZX, by digital coincidence
153EU2cN counting), 0.290 {I8} (measurement of Geidelman as quoted in 1992Ch16),
153EU2cN 0.302 {I6} (from I{-Kx} intensity analysis by 1981Gr19),
153EU4cN 0.276 {I10} (1997Ka47)
153EU PN 3
153EU G 21.2 0.075 12
153EU cG RI From 1988Su13 and 1995Ku34; other: < 0.03 (1993Eg05).
153EU L 0.0 5/2+ STABLE
153EU E 1 LT 9.5 GT
153EUS E CK=0.8199$CL=0.13899 3$CM+=0.04111 1
153EU cE IE Computed from |g intensity balance with the given I|g
153EU2cE normalization factor.
153EU L 83.36720 13 7/2+ 0.77 NS 5
153EU cL T From 1986Sa34.
153EU G 83.36717 21 0.676 14M1+E2 0.81 4 3.76 7
153EUS G KC=2.33 4$LC=1.11 5$MC=0.257 12
153EUS G NC=0.0573 25$OC=0.0080 4$PC=0.000230 5
153EU cG K:L1:L2:L3:M:N+=1.78:0.210:0.339:0.377:0.165:0.057
153EU L 97.43103 15 5/2- 0.180 NS 20
153EU cL T From 1968Ma15; other: < 0.35 ns (1965Me08).
153EU E 39.2 5 7.72 1
153EUS E CK=0.8124$CL=0.14453 6$CM+=0.04304 2
153EU G 14.06383 20 0.061 9 E1 10.89
153EUS G LC=8.54 12$MC=1.90 3
153EUS G NC=0.405 6$OC=0.0479 7$PC=0.00189 3
153EU cG E From level energies.
153EU cG RI Values range from 0.051 {I5} to 0.146 {I15} and
153EU2cG reduced-|h{+2}=4.3.
153EU G 97.43100 21 100 E1 0.305
153EUS G KC=0.256 4$LC=0.0382 6$MC=0.00823 12
153EUS G NC=0.00185 3$OC=0.000278 4$PC=2.13E-5 3
153EU L 103.18016 12 3/2+ 3.87 NS 5
153EU cL T$Adopted value. 3.88 ns {I4} is the weighted average of the values
153EU2cL measured in {+153}Gd |e decay only, 3.87 ns {I10} (1986Sa34),
153EU3cL 3.8 ns {I1} (1978AnZP), 3.89 ns {I10}, and 3.92 ns {I7} (evaluator's
153EU3cL average of 4 values in 1965Me08)
153EU E 44.2 10 7.65 1
153EUS E CK=0.8118$CL=0.14496 6$CM+=0.04319 2
153EU G 19.81296 19 E2 3.22E3 0.7 4
153EUS G L/T=0.775 8$M/T=0.180 4
153EUS G N/T=0.0395 8$O/T=0.00520 11$P/T=2.11E-6 5
153EUS G LC=2.49E3 4$MC=578 8
153EUS G NC=127.1 18$OC=16.73 24$PC=0.00678 10
153EU cG E From level energies.
153EU cG RI From I{-ce}(LM)=1.17 (1963Gr09) I(|g+ce)+1.3 and then from
153EU2cG |a=3290, I|g=0.0004. The measured values are very different;
153EU2cG they include 0.005 {I1} (1974Se08), 0.089 {I9} (1985Si03),
153EU3cG 0.072 {I11} (1988Su13), 0.006 {I1} (1988Ve05), and 0.019 {I3}
153EU4cG (1995Ku34).
153EU cG TI From intensity balance at 83-keV level. Other: 1.3 from
153EU2cG I{-ce}(LM)=1.17 (1963Gr09) and |a's.
153EU G 103.18012 17 73.5 6 M1+E2 0.119 3 1.694
153EUS G KC=1.422 20$LC=0.213 3$MC=0.0462 7
153EUS G NC=0.01057 15$OC=0.001662 24$PC=0.0001568 22
153EU dG RI The seven values included are somewhat inconsistent in that
153EU2dG the reduced-|h{+}=3.7 for the average.
153EU cG MR Computed with penetration parameter |l=5.3 {I8}.
153EU L 151.6246 12 7/2- ?
153EU cL E This level is known to exist from {+153}Sm |b- decay and
153EU2cL {+152}Eu(n,|g) and it is generally reported in this decay.
153EU3cL The |e branch is 2nd forbidden, so the log{Ift} is expected
153EU4cL to be |> 11 (1973Ra10) which corresponds to I(|e) |< 0.015%.
153EU G 54.1934 4 M1(+E2) 18.4 76 S ?
153EUS G KC=6.3 28$LC=9.3 80$MC=2.2 19
153EUS G NC=0.48 42$OC=0.065 55$PC=6.8E-4 35
153EU cG RI$From limit of I(|e,151) |< 0.015%, if the 54 is the only |g from
153EU2cG this level, I|g(54) < 0.0026 for |a=18.4. In contrast,
153EU3cG the reported values include 0.058 {I8} (1988Su13) and 0.027 {I2}
153EU3cG (1995Ku34). Therefore, there is a problem with this |g placement.
153EU G 68.2557 5 E1 0.790 S ?
153EUS G KC=0.657 10$LC=0.1042 15$MC=0.0225 4
153EUS G NC=0.00503 7$OC=0.000739 11$PC=5.20E-5 8
153EU cG RI The five reported values are reasonably consistent
153EU2cG (reduced-|h{+2}=2.2) and an average of 0.056. However, if the
153EU3cG |e feeding to this level is |<0.015% with no |g feeding, even
153EU4cG if this is the only |g from this level its I|g is < 0.026 and
153EU5cG if other |g depopulate this level. In the {+153}Sm |b- decay
153EU6cG and {+152}Eu(n,|g), the I|g(151)/I|g(68) ratio is between
153EU7cG 5 and 9, so the limit may be much lower.
153EU8cG Therefore, this |g may be misplaced.
153EU G 151.6245 12 E1 0.0920 S ?
153EUS G KC=0.0779 11$LC=0.01112 16$MC=0.00239 4
153EUS G NC=0.000541 8$OC=8.26E-5 12$PC=6.88E-6 10
153EU cG RI The reported values are inconsistent, namely, < 0.01
153EU2cG (1992Ch44), 0.060 {I15} (1988Su13), 0.02 {I1} (1988Ve05), and
153EU3cG 0.021 {I1} (1995Ku34), 0.00163 {I20} (2017ShZX)
153EU L 172.85318 13 5/2+
153EU E 16.0 5 7.89 1
153EUS E CK=0.8028 2$CL=0.15169 9$CM+=0.04553 3
153EU G 69.67300 13 8.18 21M1+E2 0.136 4 5.31
153EUS G KC=4.39 7$LC=0.719 12$MC=0.1572 25
153EUS G NC=0.0358 6$OC=0.00555 9$PC=0.000485 7
153EU G 75.42213 23 0.270 8 E1+M2 0.055 10 0.76 7
153EUS G KC=0.62 5$LC=0.112 13$MC=0.025 3
153EUS G NC=0.0056 7$OC=0.00083 11$PC=6.3E-5 9
153EU G 89.48595 22 0.27 4 M1+E2 0.25 10 2.60 7
153EUS G KC=2.11 5$LC=0.38 7$MC=0.085 16
153EUS G NC=0.019 4$OC=0.0029 5$PC=0.000230 7
153EU G 172.85307 21 0.1304 24M1+E2 0.81 8 0.377
153EUS G KC=0.296 7$LC=0.0637 22$MC=0.0142 6
153EUS G NC=0.00321 12$OC=0.000477 15$PC=3.00E-5 10