220RN 224RA A DECAY 2021BE13,1977KU15,1962WA2826NDS 202609
220RN H TYP=FUL$AUT=J.Chen, M.S. Basunia P.Dimitriou, et al.,$
220RN2 H CIT=NDS 212, 18 (2026)$CUT=31-Mar-2026$
220RN c 2021Be13: {+224}Ra sources were produced and chemically separated from
220RN2c the decay of {+228}Th; measured T{-1/2} and I|g(241) at National
220RN3c Institute of Standards and Technology (NIST) in USA and National
220RN4c Physical Laboratory (NPL) in UK using ionization chamber and HPGe
220RN5c detectors employing digital coincidence counting and triple-to-double
220RN6c coincidence ratio liquid scintillation counting.
220RN c 1977Ku15: {+224}Ra as a descendant of {+232}U which was chemically
220RN2c separated from {+228}Th activity and it's daughters. Measured E|g, I|g
220RN3c using Ge(Li) detectors.
220RN c Absolute gamma-ray intensity measurements: 2021Be13, 1992Li05,
220RN2c 1984Ge07, 1984Bo15, 1983Va22, 1983Sc13, 1982Sa36, 1969Pe17
220RN c |a|g(|q): 1954Mi53, 1974Or02, 1989Po03, 2005JoZY
220RN c |a|g(|q,H): 1972Ab13, 1973He13, 1974Do11
220RN c The decay scheme is that of 1977Ku15
220RN cA HF$The nuclear radius parameter r{-0}({+220}Rn)=1.542171 {I85} is
220RN2cA deduced from assumed HF=1.0 for the ground-state to ground-state alpha
220RN3cA decay branch
220RN cA E$From 1962Wa28, except where noted. Authors' values have been
220RN2cA increased by 1.6 keV to correct for changes in calibration energies
220RN3cA (1991Ry01)
220RN cA IA(T)$From |g-ray transition intensity balance.
220RN cG E$From 1977Ku15, except where noted.
220RN cG RI$Absolute I|g values are from relative I|g from 1977Ku15, normalized
220RN2cG to absolute I|g=4.011 {I16} for the 240.986|g.
220RN cG M$From the Adopted Gammas.
220RN cL E$From a least-squares fit to E|g, by evaluators.
220RN cL J$From the Adopted Levels. Additional support from this dataset
220RN2cL provided in comments.
220RN cL BAND(A)$Ground state band
220RN cL BAND(B)$K|p=0- Band
220RN cL T$From the Adopted Levels. Data derived from this dataset is given in
220RN2cL the comments.
220RN dG CC$FROM BrIcc v2.3e (17-Jun-2020) 2008Ki07, "Frozen Orbitals" appr.
224RA P 0 0+ 3.6316 D 23 5788.92 15
224RA cP T$From Adopted Levels of {+224}Ra in ENSDF database (2022 May update)
224RA cP QP$From 2021Wa16
220RN N 1.0 1.0
220RN cN NR$From absolute I|g(240.986|g)=4.011 {I16}, weighted average of 4.011
220RN2cN {I16} (2021Be13), 4.11 {I12} (1992Li05), 3.99 {I14} (1984Ge07), 4.00
220RN3cN {I7} (1984Bo15), 4.05 {I9} (1983Va22), 4.04 {I17} (1983Sc13), 3.9 {I2}
220RN4cN (1982Sa36), 3.95 {I13} (1969Pe17). Other: 4.19 {I4} (1984Ge07);
220RN5cN including in the weighted average gives 4.033 {I20} but with a reduced
220RN6cN |h{+2} of 2.15, compared with the critical reduced |h{+2} of 1.88.
220RN PN 3
220RN L 0.0 0+ 55.61 S 4 A
220RN A 5685.37 1594.92 5 1.0
220RN cA E$from 1991Ry01, adjusted measurement of 1971Gr17 (-0.19 keV)
220RN cA IA$from 100-|SI(|a to excited states)
220RN L 240.986 6 2+ 0.146 NS 5 A
220RN cL T$from |a|g(t) (1960Be25) (weighted average of 0.150 ns {I10} and 0.145
220RN2cL ns {I5})
220RN G 240.986 6 4.011 16 E2 0.276 4
220RNS G KC=0.1109 16$LC=0.1220 17$MC=0.0324 5$NC=0.00843 12$OC=0.001724 24$
220RNS G PC=0.0002019 28
220RN cG E$from 1977Ku25, corrected for a change in calibration (new {+198}Au
220RN2cG E|g=411.80205 {I17} (1995HeZZ))
220RN cG RI$see comment on normalization
220RN cG M$supported by K:L2:L3=100:65:61 (1954Ro10)
220RN A 5448.6 125.06 5 1.077 11
220RN cA E$from 1991Ry01, 1962Ba19
220RN cA IA$weighted average of 5.05% {I5} (1969Pe17), 5.07% {I5} (1984Bo15).
220RN2cA Other: 5.11 {IX} from intensity balance.
220RN L 533.69 10 4+ 46.1 PS 18 A
220RN cL J$4+ from |a|g(|q) from 0+ parent (1989Po03)
220RN G 292.70 10 0.0061 7 [E2] 0.148721
220RNS G KC=0.0727 10$LC=0.0564 8$MC=0.01484 21$NC=0.00386 5$OC=0.000795 11$
220RNS G PC=9.50E-5 13
220RN A 5161 0.0070 8 18.5 22 T
220RN cA IA$other: 0.0073 {I18} from 1962Wa28
220RN L 645.44 9 1- B
220RN cL J$1- from |a|g(|q) from 0+ parent (1989Po03)
220RN G 404.2 2 0.0021 5 [E1] 0.0171924
220RNS G KC=0.01403 20$LC=0.002410 34$MC=0.000568 8$NC=0.0001471 21$
220RNS G OC=3.17E-5 4$PC=4.43E-6 6
220RN G 645.50 10 0.0053 9 [E1] 0.006639
220RNS G KC=0.00545 8$LC=0.000894 13$MC=0.0002097 29$NC=5.43E-5 8$
220RNS G OC=1.178E-5 16$PC=1.678E-6 23
220RN A 5051 0.0074 11 3.8 6 T
220RN cA IA$other: 0.0072 from 1962Wa28
220RN L 663.03 10 (3)- B
220RN G 422.04 10 0.0029 5 E1 0.0156722
220RNS G KC=0.01280 18$LC=0.002190 31$MC=0.000516 7$NC=0.0001336 19$
220RNS G OC=2.88E-5 4$PC=4.03E-6 6
220RN A 5034 0.0029 5 7.7 14 T
220RN cA IA$other: 0.0031 from 1962Wa28