216RN    220RA A DECAY                 1961RU06                  26NDS    202603
216RN  H TYP=FUL$AUT=C. Morse$CIT=NDS 209, 409 (2026)$CUT=5-Aug-2025$
216RN cL J,T$From adopted levels
216RN cA HF$The nuclear radius parameter r{-0}({+216}Rn)=1.5530 {I37} is
216RN2cA deduced from assumed HF=1.0 for the ground-state to ground-state
216RN3cA alpha decay branch
216RN cA IA$From 1961Ru06
216RN dA HF$Hindrance Factor is calculated by AlphaHF (version 16-Dec-2025)
216RN DG CC$FROM BrIcc v2.3e (17-Jun-2020) 2008Ki07, "Frozen Orbitals" appr.
220RA  P 0            0+                18.1 MS   12             7594     5
220RA cP T$Weighted average of 23 ms {I5} (1961Ru06), 17 ms {I2} (1989An13),
220RA2cP 18 ms {I2} (2000He17), 19 ms {I3} (2018Sa45), and 18.2 ms {I39}
220RA3cP (2025Gu12).
220RA cP QP$From 2021Wa16
216RN  N 1.0                    1.0
216RN cN NR$I|g per 100 |a decays
216RN  A 7393      15                                                          ?
216RN cA $Only observed in 2000He17 with I|a=0.05 {I3} relative to E|a=7449
216RN2cA peak. If this decay does exist, it implies an isomeric state of
216RN3cA {+216}Rn at E{-x}|?60 keV.  This is unlikely in an even-even nucleus.
216RN  L 0.0          0+                45 US     4
216RN  A 7456      4 99.0    4 1.0
216RN cA E$Weighted average of 7450 keV {I10} (1961Ru06), 7455 keV {I10}
216RN2cA (1970Va13), 7460 keV {I20} (1989An13), 7449 keV {I10} (2000He17),
216RN3cA 7460 keV {I10} (2018Sa45), 7465 keV {I11}, and 7457 keV {I9}
216RN4cA (2025To01). Other: 7490 keV (1949Me54), 7430 keV {I30} (1952Or03)
216RN  L 461.4     2  2+
216RN  G 461.4     2  1.0    4  E2                      0.04276
216RNX G %IG=1.0 4
216RNS G KC=0.0278 4$LC=0.01116 16$MC=0.00285 4$NC=0.000743 10$OC=0.0001554 22$
216RNS G PC=1.974E-5 28
216RN cG E,M$Adopted values, from {+208}Pb({+18}O,2|a2n|g) dataset (2006De09).
216RN2cG E{-|g}=456 keV {I4} in 1961Ru06.
216RN cG RI$From 1961Ru06.
216RN  A 6990        1.0     4 2.7     13                                      S
216RN cA $1961Ru06 did not observe this |a decay, but deduced its intensity
216RN2cA from |g-ray data.