157DY 157DY IT DECAY (21.6 MS) 1970BO02,1971KIZQ 16NDS 201602
157DY H TYP=FUL$AUT=N. NICA$CIT=NDS 132, 1 (2016)$CUT=4-Dec-2015$
157DY c This isomer has been produced by {+157}Gd({+3}He,3n), {+156}Dy(n,|g),
157DY2c and {+156}Gd(|a,3n|g) reactions. |g's measured with Ge, Si(Li),
157DY3c and NaI detectors and ce measured with magnetic spectrometer.
157DY c Experimental methods:
157DY c 1970Bo02: produced by {+157}Gd({+3}He,3n) with pulsed beam with
157DY2c E({+3}He)=20 MeV on enriched (93.7%) target. |g's measured
157DY3c with Ge and NaI detectors and ce with magnetic spectrometer.
157DY c 1971KiZQ: produced by {+156}Dy(n,|g) with pulsed n source on
157DY2c enriched target. |g's measured with Ge, Si(Li), and NaI
157DY3c detectors.
157DY cG E From 1971KiZQ; other: 1970Bo02.
157DY cG RI Average of data from 1970Bo02 and 1971KiZQ.
157DY cG RI$From 1970Bo02, I(K| x ray)+I{-|g}(51)=2.7 {I11}. Since I{-|g}(51)
157DY2cG is negligible, this value is the measured K x-ray intensity. However,
157DY3cG for this decay scheme the calculated I(K| x ray) is much larger, namely
157DY4cG |? 5.2. In contrast, 1971KiZQ indicate that their measured I(K| x ray)
157DY5cG is consistent with the decay scheme, but they do not give a value.
157DY cG M From {+157}Dy Adopted |g radiations and based on the ce
157DY2cG data of 1970Bo02 and the ce data from the |e decay of {+157}Ho.
157DY3cG 1970Bo02 assign M1 for 61 and 87 |g's from |a{-L}(exp) and E2
157DY4cG for 148 from K/L. 1971KiZQ assign E1 to 14 and 37 |g's from
157DY5cG intensity balance at 148 level.
157DY cG MR From {+157}Dy Adopted |g radiations.
157DY DG CC$FROM BrIcc v2.3a (30-Jun-2013) 2008Ki07, "Frozen Orbitals" appr.
157DY cL E From least-squares fit to |g energies. More precise values
157DY2cL are available in {+157}Dy Adopted Levels.
157DY cL J From {+157}Dy Adopted Levels.
157DY cL T Values are from isomer decay studies only. Measurement
157DY3cL methods are: {+3}He pulse-|g(t) (1970Bo02), |g(t) (1971KiZQ),
157DY4cL and |a pulse-|g(t) (1973Kl03).
157DY DL Level is 11/2- (199).
157DY cL BAND(A) 3/2[521] band
157DY cL BAND(E) 11/2[505] bandhead
157DY P 199.5 5 11/2- 21.6 MS 16
157DY N 23 2 23 2 1.00
157DY cN NR$computed to give 100% decays for the average of the intensities (1)
157DY2cN out of the 199 level, (2) out of the 148 level, and (3) into the ground
157DY3cN state. With this normalization, these three intensities are 104%, 110%,
157DY4cN and 89%, respectively.
157DY PN 3
157DY L 0.0 3/2- A
157DY L 61.0 4 5/2- A
157DY G 61.0 5 0.30 3 M1+E2 0.20 2 10.3 3
157DYS G KC=8.14 23$LC=1.68 11$MC=0.379 25
157DYS G NC=0.087 6$OC=0.0120 7$PC=0.000512 15
157DY L 148.0 4 7/2- A
157DY G 87.0 5 0.91 6 M1+E2 0.19 2 3.61 8
157DYS G KC=2.96 7$LC=0.509 19$MC=0.114 5
157DYS G NC=0.0261 10$OC=0.00370 13$PC=0.000183 5
157DY G 148.0 5 0.29 5 E2 0.661 13
157DYS G KC=0.385 7$LC=0.212 5$MC=0.0504 11
157DYS G NC=0.01134 24$OC=0.00140 3$PC=1.71E-5 3
157DY L 162.2 5 9/2+
157DY G 14.2 1 0.155 25E1 11.6 3
157DYS G LC=9.04 22$MC=2.07 5
157DYS G NC=0.443 11$OC=0.0458 11$PC=0.001032 21
157DY L 199.5 5 11/2- 21.6 MS 16 E
157DY cL T The measured values of 19.2 ms {I5} (1973Kl03), 24 ms {I1}
157DY2cL (1971KiZQ), and 21 ms {I3} (1970Bo02) are inconsistent; their
157DY3cL weighted average is 20.2, with an internal uncertainty of 0.4, a
157DY4cL reduced-|h{+2} of 9.2, and an external uncertainty of 1.4. The
157DY5cL evaluator has adopted the mean of the weighted average of 21.2
157DY6cL {I13} from the Normalized Residual Method (1992Ja06) and 21.9
157DY7cL {I19} from the Rajeval Method (1992Ra08); both of these methods
157DY8cL increase the uncertainties of the more discrepant input values.
157DY G 37.3 1 1.00 4 (E1) 0.807 13
157DYS G LC=0.632 10$MC=0.1399 23
157DYS G NC=0.0311 5$OC=0.00388 7$PC=0.0001283 20
157DY cG RI Reported value is 100, but that value is inconsistent by a
157DY2cG factor of 100 from other I{-|g} values.
157DY G 51.5 15 (E2) 37 6 2.7 5
157DYS G L/T=0.75 8$M/T=0.18 4
157DYS G N/T=0.040 9$O/T=0.0047 11$P/T=5.0E-6 8
157DYS G LC=28 5$MC=6.8 11
157DYS G NC=1.53 24$OC=0.18 3$PC=0.000189 11
157DY cG TI$Deduced from intensity balance at 148 level; i.e.,
157DY2cG I(|g+ce)(51)=I(|g+ce)(87) + I(|g+ce)(148) - I(|g+ce)(14). The
157DY3cG corresponding calculated I{-|g}(51)=0.071 {I17} and the measured value
157DY4cG is <0.12 (1971KiZQ).