156HO 156ER EC DECAY 1999KAZV,2003KAZQ 12NDS 201210
156HO H TYP=FUL$AUT=C. W. REICH$CIT=NDS 113, 2537 (2012)$CUT=1-Mar-2012$
156HO D DATA SET UPDATED (DECEMBER, 2011) BY CW REICH TO INCLUDE NEW QP
156HO2D VALUE, NEW DATA FROM 2003KaZQ, REVISED JPI VALUES, AND CC VALUES
156HO3D FROM BRICC.
156HO c 2003KaZQ: This represents a published version of the material contained
156HO2c in the private communication of 2002KaZL.
156HO c 2002KaZL: Private communication to the evaluator from V. G. Kalinnikov
156HO2c (August, 2002). This information represents a further analysis of the
156HO3c data of 1999KaZV. They extend, and in some instances change, the
156HO4c conclusions of this earlier study.
156HO c 1999KaZV: {+156}Er from high-energy proton-induced spallation on a W
156HO2c target. Isotope-separated samples. Measured E|g, I|g, ce, |g|g. Report
156HO3c E|g, I|g, I{_e}, multipolarities, J{+|p} and Q(|e).
156HO c 1995KaZS: Using isotope-separated {+156}Ho sources, report T{-1/2} for
156HO2c the 52-keV isomeric state.
156HO c 1982Vy06: {+156}Er from proton-induced spallation on a Ta target.
156HO2c E(p)=660~MeV. Chemical and isotope separation, |g's measured using
156HO3c Ge(Li) detectors. ce measured using a magnetic spectrometer and
156HO4c spectrograph. Measured |g-ce coin. Three I|g values are identical to
156HO5c those in 1975Al26, so evaluator assumes that they were not remeasured.
156HO c 1975Al26: {+156}Er from proton-induced spallation on a Ta target.
156HO2c E(p)=660~MeV. Chemical and isotope separation |g's measured using
156HO3c Ge(Li) detectors. ce measured using a magnetic spectrometer. Report
156HO4c E|g, I|g, I(ce), and deduced multipolarities.
156HO c 1978Sc10: {+156}Er from proton-induced spallation on a Ta target.
156HO2c E(p)=660~MeV. Isotope separation. Measured half-lives by Kx-ce coin
156HO3c using a NaI(Tl) detector and a magnetic spectrometer.
156HO c Others: 1981BuZJ, 1975Gr44, 1965Zh02.
156HO D Other experiments:
156HO D 1965Zh02: 156ER from proton-induced spallation of Ta target with
156HO2D E(P)=660 MeV and chemical separation. Magnetic CE spectrometers
156HO3D and scintillation G detectors. Deduce T(156ER) LT 12 MIN.
156HO D 1969Ek01: 156HO(?) from 165HO(P,PXN) at E(P)=100 MeV and DY(P,XN) at
156HO2D E(P)=85 MeV. Spin measured for a 55-min activity by atomic-beam
156HO3D magnetic resonance. The evaluator assumes that this activity was not
156HO4D 156ER.
156HO D 1975Gr44: Summary of work at laboratory with reference to 1975Al26.
156HO D 1981BuZJ: Conference abstract; report RI, I(CE), and multipolarities.
156HO2D Same data are reported in 1982Vy06.
156HO c The level scheme is primarily that proposed by 2003KaZQ, together with
156HO2c the placement of several |g's unplaced in previous studies. It is in
156HO3c most instances similar to that of 1999KaZV. Where there are
156HO4c differences, these are pointed out. The placement of several |g's is
156HO5c that from the earlier studies.
156HO c 2007KaZT discuss allowed-unhindered ("spin-flip") |e transitions
156HO2c involving {+156}Ho, {+158}Ho, and {+160}Ho and, using nuclear-model
156HO3c considerations, configuration assignments for several of the low-lying
156HO4c bandheads in these nuclides.
156HO c From the 511-keV photon intensity, the total I|b{++}=0.21% {I10}
156HO2c (1982Vy06).
156HO c The intensities of the |e+|b{++} branches are computed from intensity-
156HO2c balance considerations and should be regarded as questionable in some
156HO3c instances. For example, the small log| {Ift} value for the transition
156HO4c to the 52.37, 1- level, together with the absence of a |g deexciting
156HO5c the 251.1 level, suggest that there are intensity imbalances in the
156HO6c proposed level scheme. Nonetheless, because of the strong population of
156HO7c the 1+ level at 117.58~keV in |e decay, the log| {Ift} value of the
156HO8c feeding transition is most probably|?4.5, indicating an
156HO9c allowed-unhindered transition.
156HO cG E,RI$From 2003KaZQ, unless noted otherwise.
156HO cG E(W)$|g reported by 2003KaZQ, but not explicitly placed by them.
156HO2cG Placement is that of the evaluator.
156HO cG M,MR$From ce data of 1975Al26, unless noted otherwise.
156HO cL E$Computed from the listed |g-ray energies.
156HO cL E(Y)$New level introduced by 2003KaZQ, but no properties other than the
156HO2cL level energy are given.
156HO cL J$From the adopted values.
156HO cL BAND(A)$K{+|p}=4- Bandhead. Probable conf=|p5/2[402]+|n3/2[521]. The
156HO2cL |S=1 coupling of these two orbitals lies below the |S=0 coupling, in
156HO3cL agreement with the expectations of 1958Ga27.
156HO cL BAND(B)$K{+|p}=1- Bandhead. Probable conf=|p5/2[402]-|n3/2[521]. The
156HO2cL |S=0 coupling of these two orbitals lies above the |S=1 coupling, in
156HO3cL agreement with the expectations of 1958Ga27.
156HO cL BAND(C)$K{+|p}=2- Bandhead. Probable conf=|p7/2[404]-|n3/2[521].
156HO cL BAND(D)$K{+|p}=1+ Bandhead. Conf=|p7/2[523]-|n5/2[523].
156ER P 0 0+ 19.5 M 10 1260 65
156ER DP T From 156ER Adopted Levels.
156ER DP QP From 2011AuZZ. From 2002KaZR, 2002KaZO (E(B+)), QP=1410 15.
156ER2DP 1999KaZV REPORT QP(MeV)=1.43 6. From IB+ and deduced EC/B+ ratio,
156ER3DP 1982Vy06 give QP=1700 +100-50.
156HO N 0.26 3 0.26 3 1.0
156HO cN NR$Note that the energy of the |g connecting the 52.37 level and the
156HO2cN g.s. is essentially identical to that deduced from the energy
156HO3cN difference of the 286 and 215 levels. If a significant portion of the
156HO4cN intensity in this peak is in fact to be associated with this latter
156HO5cN placement, then the basis for the intensity normalization chosen here
156HO6cN is called into question. (The possibility of this additional placement
156HO7cN has been pointed out by the reviewer.)
156HO cN BR %|a=7|*10{+-6} {I3}, from the {+156}Er adopted levels. It is
156HO2cN assumed here that %|e+%|b{++}=100.
156HO cN calculated to give 100% feeding to the g.s.
156HO PN 3
156HO L 0 4- 56 M 1 A
156HO cL T$From the adopted values.
156HO L 52.37 1- 9.5 S 15 BM
156HO cL $See the discussion in the Adopted Levels, Gammas data set regarding
156HO2cL the configuration of this level.
156HO cL T$From 1995KaZS, (ce(L)(52|g),t).
156HO E 23 13 4.9 3 23 13
156HOS E CK=0.8283 7$CL=0.1323 5$CM+=0.03938 18
156HO G 52.37 0.091 9M3 4.17E3 380 40
156HOS G L/T=0.740 8$M/T=0.205 4$N+/T=0.0541 11
156HOS G N/T=0.0480 10$O/T=0.00592 12$P/T=0.000135 3
156HO cG RI$Computed from |a and the listed I(|g+ce) value.
156HO cG M From L and M subshell ratios (1975Al26,1982Vy06).
156HO cG TI$Value is I{-e} for this transition (1999KaZV).
156HO L 82.23 2- 1.38 NS 12 C
156HO cL T Weighted average of 1.46 ns {I15} (1975Al26) and 1.25 ns
156HO2cL {I20} (1978Sc10) from (|g+x)-30 coincidences. 1999KaZV report 1.25 ns.
156HO cL $1999KaZV report J{+|p}=2-. If the 82.18 |g is correctly placed, then
156HO2cL the possible J{+|p} values, 0- or 1- are ruled out. In this case,
156HO3cL little |e+|b{++} feeding of this level is expected (and observed).
156HO E 0 9
156HO G 29.86 18.3 13M1+E2 0.033 6 15.0 4 C
156HOS G LC=11.7 3$MC=2.60 6$NC+=0.694 15
156HOS G NC=0.603 14$OC=0.0867 17$PC=0.00466 7
156HO cG RI$Weighted average of: 17.0~{I17} (1975Al26); and 20.0~{I20}
156HO2cG (1999KaZV). 1982Vy06 list 17.0~{I17}.
156HO cG M,MR$From L and M subshell ratios (1975Al26,1982Vy06). 1999KaZV
156HO2cG indicate mult=M1.
156HO G 82.18 1.2 3E2 5.98 ?
156HOS G KC=1.688 24$LC=3.29 5$MC=0.796 12$NC+=0.200 3
156HOS G NC=0.179 3$OC=0.0211 3$PC=7.16E-5 10
156HO cG $1999KaZV place this |g from the 82.2 level. However, 2003KaZQ do not
156HO2cG definitely assign this |g to the {+156}Er decay.
156HO cG M$From 1999KaZV.
156HO L 91.0 1+
156HO E 18 7 4.97 18 18 7
156HOS E CK=0.8279 8$CL=0.1326 6$CM+=0.03948 19
156HO G 8.72 5 6.5 22 E1 11 78 24
156HOS G MC=8.30 $ NC+=2.7
156HO cG E$From identification (2003KaZQ) of a 6.98~{I5} keV conversion line as
156HO2cG an M{-3} line from an E1 transition. 1999KaZV assign it as an M{-1}
156HO3cG line from a 9.11-keV M1 transition.
156HO cG RI$Computed from Ice(M{-3})=18~{I6} (2003KaZQ) and |a(M3)=2.77 for an
156HO2cG 8.72 E1 |g.
156HO cG M$From 2003KaZQ. 1999KaZV identify the 6.98~{I5} electron line as an
156HO2cG M{-1} line and report mult=M1.
156HO cG TI$From I|g and |a. 2003KaZQ estimate I(|g+ce)|?60. 1999KaZV report
156HO2cG I{-e}=27~{I9} for a 9.11|g.
156HO L 117.58 1+ 58 NS 3 D
156HO cL T$From Kx-35|g coincidences (2005KaZY). From Kx-35|g coincidences,
156HO2cL 1978Sc10 report T{-1/2} = 58~ns~{I4}. 1999KaZV report 58~ns.
156HO E 52 6 4.48 8 52 6
156HOS E CK=0.8276 8$CL=0.1328 6$CM+=0.03956 20
156HO G 26.55 10 0.20 5M1+E2 0.12 35.1 7
156HOS G LC=27.2 6$MC=6.23 13$NC+=1.62 4
156HOS G NC=1.42 3$OC=0.188 4$PC=0.00654 12
156HO cG RI$From Ice(L{-1})=3.0~{I8} (2003KaZQ) and |a(L1)=14.6.
156HO cG M,MR$From |a(L1)exp|>11 and the relative intensity ratios of 1,
156HO2cG |?0.40,|?0.65, respectively, for the L1, L2, L3 lines, 2003KaZQ
156HO3cG conclude mult is M1+1.5%E2 for this transition. 1999KaZV report E1.
156HO G 35.37 100 E1 0.968
156HOS G LC=0.757 11$MC=0.1687 24$NC+=0.0424 6
156HOS G NC=0.0376 6$OC=0.00460 7$PC=0.0001448 21
156HO cG E,M$From 1999KaZV.
156HO G 65.16 0.65 APE1 0.977 ?
156HOS G KC=0.801 12$LC=0.1375 20$MC=0.0304 5$NC+=0.00781 11
156HOS G NC=0.00688 10$OC=0.000900 13$PC=3.45E-5 5
156HO cG E$Placement is that of 1999KaZV, but 2003KaZQ question its association
156HO2cG with the {+156}Er decay.
156HO cG M$From 1999KaZV.
156HO L 215.74 1-
156HO E 2.6 5 5.70 11 2.6 5
156HOS E CK=0.8264 10$CL=0.1337 7$CM+=0.03987 25
156HO G 133.51 4.7 5M1 1.145 C
156HOS G KC=0.963 14$LC=0.1425 20$MC=0.0315 5$NC+=0.00843 12
156HOS G NC=0.00730 11$OC=0.001062 15$PC=5.96E-5 9
156HO cG RI$From 1999KaZV. 1975Al26 (and 1982Vy06) report I|g=4.4~{I14}.
156HO L 251.09 Y
156HO L 268.12 1
156HO E 1.3 2 5.96 10 1.3 2
156HOS E CK=0.8257 11$CL=0.1343 8$CM+=0.0401 3
156HO G 185.89 5.0 7 C
156HO cG RI$From 1999KaZV. 1982Vy06 report I|g=1.5~{I6}.
156HO L 303.52 Y
156HO E 0.70 12 6.19 10 0.70 12
156HOS E CK=0.8251 12$CL=0.1347 9$CM+=0.0402 3
156HO G 221.33 5 2.7 3 W
156HO L 434.2 10 1
156HO E 0.4 2 6.30 24 0.4 2
156HOS E CK=0.8227 16$CL=0.1365 12$CM+=0.0409 5
156HO G 352.0 10 1.6 8 C
156HO cG RI$From 1982Vy06.
156HO L 504.95 Y
156HO E 1.5 2 5.64 11 1.5 2
156HOS E CK=0.8209 20$CL=0.1378 15$CM+=0.0413 5
156HO G 253.86 1.3 3 W
156HO G 387.37 4.6 5 W
156HO L 571.64 Y
156HO E 0.33 8 6.22 15 0.33 8
156HOS E CK=0.8189 24$CL=0.1392 18$CM+=0.0418 7
156HO G 320.55 1.25 25 W