155DY 155DY IT DECAY (6 US) 19NDS 201911
155DY H TYP=FUL$AUT=N. NICA$CIT=NDS 160, 1 (2019)$CUT=21-Oct-2019$
155DY c 1970Bo02: the source was produced in the {+155}Gd({+3}He,3n|g)
155DY2c reaction, using a pulsed beam. Measured E|g, I|g, Ice, delayed |g,
155DY3c delayed ce. The activity was assigned to {+155}Dy by comparison of the
155DY2c measured E|g with known values reported in the {+155}Ho |e decay.
155DY c Although 1970Bo02 correctly associated the isomeric state with the
155DY2c 11/2[505] Nilsson orbital, they did not propose a decay scheme for
155DY3c it. The decay scheme shown here is that worked up by the evaluator
155DY4c and relies heavily on the level-scheme information obtained from the
155DY5c {+155}Ho |e decay.
155DY cG The |g-ray properties are those as given in the
155DY2cG {+155}Ho |e decay data set.
155DY tG
155DY tG $ Relative |g-ray intensities from decay of 6-|ms {+155}Dy (1970Bo02
155DY tG $ --------------------------------------------------------------
155DY tG $ E|g(keV) I|g E|g(keV) I|g
155DY tG $ ------- ------- ------- -------
155DY tG $ 37 9 5 88 2.4 {I12}
155DY tG $ 47|* 37 20 103 9 2
155DY tG $ 68 1.4 {I10} 139 21 3
155DY tG $ 79 9.5 {I20} 147 16 2
155DY tG $ -------------
155DY tG $ |*I|g value includes a contribution from K x rays
155DY tG
155DY cG RI The relative I|g values for the |g's deexciting a given level
155DY2cG are those observed in the {+155}Ho |e decay. The I|g values of the |g's
155DY3cG deexciting a given level, relative to those deexciting other levels,
155DY4cG have been adjusted to provide a suitable intensity balance at each
155DY5cG level.
155DY cG RI The |g intensity scale has been chosen so that the sum of the
155DY2cG I(|g+ce) values of the transitions deexciting the 6-|ms isomer is
155DY3cG 100%. Note that these values depend significantly on the I(|g+ce)
155DY4cG value of the 9.1 |g. This value, relative to those of the other
155DY5cG transitions deexciting the isomer, was chosen to reproduce the
155DY6cG relative I|g values of the 138 and the 147 (and 79) |g's. It is much
155DY7cG smaller than what would be expected from the ce data of 1979Al31 and
155DY8cG 1979Ab18 on the |e decay of {+155}Ho. See the discussion under the 9.1
155DY9cG |g in the {+155}Ho |e decay data set.
155DY cL E,J From adopted values
155DY cL T From adopted values, unless noted otherwise
155DY DG CC$FROM BrIcc v2.3b (16-Dec-2014) 2008Ki07, "Frozen Orbitals" appr.
155DY P 234.33 311/2- 6 US 1
155DY N 1.0 1.0
155DY PN 1.0 3
155DY L 0.0 3/2- 9.9 H 2
155DY L 39.384 95/2- 3.34 NS 3
155DY G 39.39 2 5.5 3 M1+E2 0.222 4 11.9 3
155DYS G LC=9.26 21$MC=2.13 5
155DYS G NC=0.484 12$OC=0.0629 14$PC=0.00183 3
155DY L 86.767 127/2- 1.1 NS 2
155DY G 47.37 2 13.4 15M1+E2 0.115 10 4.03 14
155DYS G LC=3.14 11$MC=0.702 25
155DYS G NC=0.161 6$OC=0.0227 7$PC=0.001093 16
155DY G 86.75 2 4.6 2 E2 4.63
155DYS G KC=1.567 22$LC=2.36 4$MC=0.566 8
155DYS G NC=0.1269 18$OC=0.01515 22$PC=6.50E-5 10
155DY L 132.195 229/2+ 51 NS 3
155DY G 45.38 5 44 32E1 0.467
155DYS G LC=0.366 6$MC=0.0806 12
155DYS G NC=0.0180 3$OC=0.00230 4$PC=8.14E-5 12
155DY L 154.48 5 13/2+
155DY G 22.15 5 0.0075 14[E2] 2.39E3 5
155DYS G LC=1.84E3 4$MC=437 8
155DYS G NC=97.2 18$OC=11.32 21$PC=0.00350 7
155DY L 225.285 16 9/2-
155DY G 138.46 4 10.6 11E2(+M1) 2.4 GT 0.843 15
155DYS G KC=0.49 3$LC=0.272 13$MC=0.064 4
155DYS G NC=0.0145 8$OC=0.00179 8$PC=2.26E-5 22
155DY G 185.89 2 4.1 3 E2 0.302
155DYS G KC=0.197 3$LC=0.0810 12$MC=0.0190 3
155DYS G NC=0.00430 6$OC=0.000540 8$PC=9.25E-6 13
155DY L 234.33 311/2- 6 US 1 M
155DY cL T from 1970Bo02, |g(t)
155DY2 L %IT=100
155DY G 9.1 1 0.047 5 M1+E2 0.0189 21 530 AP
155DY G 79.72 5 4.3 4 E1+M2 0.23 3 3.3 7
155DYS G KC=2.4 5$LC=0.66 16$MC=0.16 4
155DYS G NC=0.036 9$OC=0.0051 12$PC=0.00024 6
155DY G 102.16 3 9.1 11E1+M2 0.45 6 3.8 8
155DYS G KC=2.8 6$LC=0.74 16$MC=0.17 4
155DYS G NC=0.040 9$OC=0.0057 13$PC=0.00028 6
155DY DG RI RELATIVE TO THE RI VALUES OF THE OTHER G RAYS OBSERVED TO
155DY2DG DEEXCITE THIS LEVEL, RI(102.16G) AS REPORTED BY 1979Ab18 IS A FACTOR
155DY3DG OF ROUGHLY 2 LARGER THAN THAT REPORTED BY 1970Bo02 (^see THE TABLE
155DY4DG ABOVE). WHILE THIS MIGHT BE CONSIDERED AS EVIDENCE THAT THE 102 G
155DY5DG IN THE WORK OF 1979Ab18 IS A DOUBLET, WE HAVE CHOSEN TO ASSUME THAT TH
155DY6DG FULL STRENGTH OF THIS G AS REPORTED BY 1979Ab18 IS ASSOCIATED WITH THE
155DY7DG DECAY OF THE 234.33 LEVEL.
155DY G 147.63 6 7.5 11[E2] 0.666
155DYS G KC=0.388 6$LC=0.215 3$MC=0.0509 8
155DYS G NC=0.01146 17$OC=0.001412 20$PC=1.721E-5 25