Erbium (Z=68)
152Er 153Er 154Er 155Er 156Er 157Er 158Er 159Er 160Er 161Er 162Er 163Er 164Er 165Er 166Er 167Er 168Er 169Er 170Er 171Er
Recommended† magnetic dipole moments
Isotope Energy [keV] t1/2 Spin/Parity μ [nm] Method Recommended Tables
166Er 81 1.81 ns 2+ +0.629(10) ME INDC(NDS)-0816
265 118 ps 4+ +1.1(2) TF INDC(NDS)-0816
545 15.0 ps 6+ +1.7(3) TF INDC(NDS)-0816
786 3.1 ps 2+ +0.74(11) TF INDC(NDS)-0816
911 4.1 ps 8+ +2.2(4) TF INDC(NDS)-0816
1216 4.4 ps 6+ +1.5(2) IPAC INDC(NDS)-0816
1350 1.62 ps 10+ +2.8(7) TF INDC(NDS)-0816


Recommended† electric quadrupole moments
Isotope Energy [keV] t1/2 Spin/Parity Q [b] Method Recommended Tables
166Er 81 1.81 ns 2+ -1.9(4) ME INDC(NDS)-0833
265 118 ps 4+ -2.7(9) CER INDC(NDS)-0833
786 3.1 ps 2+ 2.2(3) CER INDC(NDS)-0833


Compiled‡ magnetic dipole and electric quadrupole moments from published articles
Isotope Energy [keV] t1/2 Spin/Parity μ [nm] Q [b] Ref. Std Method NSR keyword doi
166Er 81. 1.85 ns 2+ +0.649(10) [167Er] ME 1981HO31 10.1007/BF01026464
+0.632(10) [167Er] ME 1968MU01
1964DO09		 10.1007/BF01380122
10.1016/0029-5582(64)90392-X
-2.9(10) CER 1970KA45
-1.9(4) ME 1965HU01
2013STZZ		 10.1007/BF01380881
265. 118 ps 4+ +1.14(8) TF 1996BR09 10.1016/0375-9474(96)00003-6
+1.26(6) [166Er 81] IPAC 1985AL22 10.1007/BF01412082
-2.7(9) CER 1969MCZS
2013STZZ
545. 16.8 ps 6+ +1.72(9) TF 1996BR09 10.1016/0375-9474(96)00003-6
+1.6(2) [166Er 265.] TF 1986DO13 10.1007/BF01294610
+1.55(7) [166Er 81] IPAC 1985AL22 10.1007/BF01412082
786. 4.6 ps 2+ +0.74(5) TF 1996BR09 10.1016/0375-9474(96)00003-6
+0.56(9) [166Er 265.] TF 1986DO13 10.1007/BF01294610
2.2(3) CER 1983HU01
2013STZZ		 10.1103/PhysRevC.27.550
2.1(4) CER 1977MC11 10.1016/0375-9474(77)90532-2
2.0(3) CER 1970MCZQ
911. 4.2 ps 8+ +2.2(2) TF 1996BR09 10.1016/0375-9474(96)00003-6
+1.9(3) [166Er 265.] TF 1986DO13 10.1007/BF01294610
+2.1(4) [166Er 81] IPAC 1985AL22 10.1007/BF01412082
1216. 3.9 ps 6+ +1.5(2) [166Er 81] IPAC 1985AL22 10.1007/BF01412082
1350. 1.7 ps 10+ +2.8(4) TF 1996BR09 10.1016/0375-9474(96)00003-6
+2.0(8) [166Er 265.] TF 1986DO13 10.1007/BF01294610

† Recommended magnetic moments are for the bare nucleus with published results corrected consistently for diamagnetism (including error estimate).
  Where appropriate published results are also adjusted to the most recent adopted half-life for the state.
  Recommended quadrupole moments are adjusted using the best electric field gradient calculation for the system concerned.
  For details see the Reports referenced.

‡ In this listing published results are given without adjustment or correction.