160HF    164W A DECAY                                            21NDS    202108
160HF  H TYP=FUL$AUT=N. NICA$CIT=NDS 176, 1 (2021)$CUT=1-May-2021$
160HF D  DATA SET UPDATED (APRIL, 2004) BY CW REICH TO INCLUDE QA VALUE OF
160HF2D   2003Au03.
160HF c  |a-related data are taken from the evaluation of 2021Si16.
160HF c  T{-1/2}({+164}W)=6.0 s {I3}, the weighted average of 6.3 s {I5}
160HF2c  (1973Ea01), 5.5 s {I5} (1975To05) and 6.4 s {I8} (1979Ho10) and
160HF3c  6.44 s {I17} (1994TeZZ) is used in calculations of the r{-0} parameter.
160HF c  %|a=3.8 {I12} is obtained from the experimental |a branchings of
160HF2c  2.6% {I17} (1979Ho10) and 5% {I1} (1996Pa01). The calculated r{-0}
160HF3c  parameters are 1.548 for %|a=2.6 and 1.582 for %|a=5.0. Since both of
160HF4c  the r{-0} values can be said to fit the systemetics, an unweighted
160HF5c  average of %|a=3.8 {I12} is used here. It should be noted, however,
160HF6c  that r{-0}=1.548 fits the r{-0} systematics better than r{-0}=1.582
160HFxc  does, favoring %|a=2.6 {I17}.
160HF c  Q(|a)({+164}W)=5278.3 {I20} is from 2021Wa16.
160HF cA HF$The nuclear radius parameter r{-0}({+160}Hf)=1.565 {I18}
160HF2cA is deduced by assuming HF=1.0 for the ground-state to
160HF3cA ground-state alpha decay branch.
164W   P 0.0         0+                6.3 S     2              5278.3    20
160HF  N                       0.038   12
160HF  L 0.0         0+
160HF  A 5149.6    23 100       1.000
160HF cA           E|a=5149.8 {I23} was recommended by 1991Ry01 from the
160HF2cA measured energies of 5153 {I5} (1973Ea01), 5146 {I5} (1975To05) and
160HF3cA 5150 {I3} (1982De11). E|a=5148 {I6}, measured by 1996Pa01,
160HF4cA agrees well with the previous values. The weighted average of these
160HFxcA E|a's becomes 5149.6 {I23}.
160HF cA IA        only one |a group was observed. An upper limit of
160HF2cA 1.09% of |a decay is calculated for an unobserved 4769.7-keV |a to
160HF3cA the 2+ state at 389.6 keV in {+160}Hf by requiring HF(4769.7|a)>1.