169LU 169LU IT DECAY (160 S) 1965BJ01 08NDS 200809 169LU H TYP=FUL$AUT=CORAL M. BAGLIN$CIT=NDS 109, 2033 (2008)$CUT=15-Jun-2008$ 169LU C Isomer identified using excitation-function data for 169LU2C YB(P,XN) (1965BJ01). 169LU C The decay scheme and all data are from 1965BJ01. Sources from 169LU2C 170YB(P,2N), EP=13 MEV (pulsed beam); YB metal targets 169LU3C enriched to 85% in 170YB. Measured ECE, ICE (magnetic spectrometer). 169LU CG RI Deduced from TI and CC. 169LU CL J,T From Adopted Levels, except as noted. 169LU P 29.0 5 1/2- 160 S 10 169LU N 1.0 1.0 1.0 169LU PN 3 169LU CN NR$from TI(29.0G)=100%. 169LU L 0.0 7/2+ 34.06 H 5 169LU L 29.0 5 1/2- 160 S 10 M 169LU2 L %IT=100 169LU CL T from ce(t) (1965BJ01). 169LU G 29.0 5 0.00106 12 E3 9.4E4 11 100 169LUS G L/T=0.72 6$M/T=0.22 3$N+/T=0.058 9 169LUS G N/T=0.052 8$O/T=0.0058 9$P/T=3.7E-6 6 169LU CG 0.5 LT (L1+L2)/L3 LE 0.8 169LU CG M (L1+L2)/L3 is consistent with E2 or E3. The lifetime, 169LU2CG compared to the WEISSKOPF estimate, corresponds to a 169LU3CG retardation of 1E+9 times for E2 and about 1E+3 times for 169LU4CG E3, and thus strongly favors E3 (1965BJ01).