212TH    216U A DECAY (4.5 MS)         2015MA37,2015DE22         20NDS    202009
212TH  H TYP=FUL$AUT=K. Auranen and E.A. McCutchan$CIT=NDS 168, 117 (2020)$
212TH2 H CUT=1-Aug-2020$
212TH c  DICT$216U A DECAY (4.5 MS)={+216}U |a decay (4.5 ms)
212TH c  2015Ma37: {+216}U activity from {+180}W({+40}Ar,4n) reaction with
212TH2c  E({+40}Ar)=189.5 MeV from the Sector-Focusing cyclotron facility at
212TH3c  HIRFL-Lanzhou. Fragments separated with gas-filled recoil separator
212TH4c  for heavy ions (SHANS). Measured E|a, |a|a correlations,
212TH5c  implant-|a(t) using position-sensitive silicon strip detector
212TH6c  surrounded by eight silicon detectors in a box-like arrangement.  Six
212TH7c  correlated decay chains were observed for the ground state of {+216}U
212TH8c  and two correlated decay chains were observed for an isomeric level
212TH9c  in {+216}U. Results also presented in 2016Zh33.
212TH c  2015De22: {+216}U activity from deep-inelastic multinucleon transfer
212TH2c  reaction {+248}Cm({+48}Ca,X), with E({+48}Ca)=270 MeV from UNILAC at
212TH3c  GSI. Fragments separated with velocity filter SHIP at GSI and
212TH4c  implanted in position-sensitive silicon strip detector. Measured E|a,
212TH5c  |a|a correlations, implant-|a(t) using silicon strip detector
212TH6c  surrounded by six silicon detectors in a box-like arrangement.
212TH7c  {+216}U decay chain was identified in one sequence of three
212TH8c  successive |a decays.
212TH cA HF$Deduced radius parameter, r{-0}=1.488 fm {I35} is calculated
212TH2cA for HF=1.0 assuming 100% ground state to ground state alpha decay.
216U   P 0.0          0+                4.5 MS   +47-16          8531     26
216U  cP T$weighted average of 4.72 ms {I+472-157} (2015Ma37) and 3.8 ms
216U 2cP {I+88-32} (2015De22) both from implant-|a(t) measurements.
212TH  N                        1.0    AP
212TH cN BR$assumed %|a|?100. From theoretical |a and |b decay half-lives of
212TH2cN 2.6 ms and 3.4 s, respectively in 2019Mo01, |b decay is expected to
212TH3cN be negligible (<0.1%).
212TH  L 0.0          0+                31.7 MS   13
212TH cL T$from the Adopted Levels
212TH  A 8372      30100       1.0
212TH cA E$weighted average of 8384 {I30} (2015Ma37) and 8340 {I50} (2015De22)