218RN 222RA A DECAY (33.6 S) 1995KO54,1976KU08,1956AS3819NDS 201911
218RN H TYP=FUL$AUT=Balraj Singh, M.S. Basunia, Murray Martin et al.,$
218RN2 H CIT=NDS 160, 405 (2019)$CUT=30-Oct-2019$
218RN c 1995Ko54: measured T{-1/2}, E|g, I|g
218RN c 1991Ga28: |a|a correlations from successive |a decays
218RN c 1976Ku08: measured E|g, I|g
218RN c 1956As38: measured T{-1/2}, E|a, I|a, |a|g coin
218RN c |a|g: 1963Le17, 1969Pe17
218RN c |g|g: 1960St20.
218RN c |a|g(|q): 1956Sm88.
218RN c |a|g(t): 1960Be25.
218RN c |a(K)exp: 1974Va28, 1963Le17
218RN c Analysis and syst of {+222}Ra |a decay data: 1987Po06
218RN cA E$Deduced by evaluators from level energies and Q(|a)=6678 {I4}
218RN2cA (2017Wa10)
218RN cA IA(A)$Derived by evaluators using |g-ray intensity balance.
218RN cA HF$HF(6558|a)=1.0 yields r{-0}({+218}Rn)=1.5492 {I22}.
218RN cG E$From 1995Ko54, unless otherwise stated. Values from 1976Ku08 are
218RN2cG consistent and provided in the comments. Others: 1974Va28,
218RN3cG 1963Le17, 1956As38, 1956Sm88, 1960St20
218RN cG RI$From 1995Ko54, unless otherwise stated. Intensities are normalized
218RN2cG to I|g(324|g)=2.77% {I8} (1969Pe17). Values from 1976Ku08 are
218RN3cG consistent and provided in the comments. Others: 1963Le17,
218RN4cG 1961Ru06, 1960St20, 1956As38
218RN cL E$From a least-squares fit to E|g, by evaluators.
218RN cL J,T$From the Adopted Levels. 1995Ko54 assigned (2+) to the 653 level
218RN2cL and (1-,2+) to the 797 and 840 levels based on g.s. transitions, but
218RN3cL in the opinion of the evaluators, |g rays to g.s. are probably
218RN4cL contributed by summing effects.
218RN cG $A |g-ray with E|g=653.14 keV {I9} and I|g(653|g)=0.00024 {I4} was
218RN2cG observed in 1995Ko54 and placed from the 653-keV level. 1995Ko54
218RN3cG note that random summing cannot be excluded from this observed
218RN4cG transition. Adopted J|p assignments give an M4 multipolarity for the
218RN5cG 653|g transition and considering I|g(516|g)=0.00142 {I8} for the
218RN6cG competing E1 depopulating transition, the transition strength for
218RN7cG 653|g would be more than 10{+6} W.u. larger than the E1 transition.
218RN8cG Thus, the evaluators consider the 653|g to have resulted from
218RN9cG summing and do not include it in this decay dataset.
218RN d Theoretical calculations of |a-decay widths: 1992De44, 1991In01,
218RN2d 1986Ch36 and 1964Ba49.
222RA P 0.0 0+ 33.6 S 4 6678 4
222RA cP T$From 2012Po13 (from |a activity measurement, decay curve and
222RA2cP uncertainty details given). Others: 36.17 s {I10} (1995Ko54, from |g
222RA3cP activity measured for 32 samples, value is from authors' text, also
222RA4cP quoted as 36.0 s {I1} in their abstract and 36.07 in Fig. 4, but decay
222RA5cP curve and details of uncertainties not given); 43 s {I4} (1982Bo04,
222RA6cP from |a activity in a complex |a spectrum with contribution from many
222RA7cP isotopes); 39 s {I4} (1958To25); 37.5 s {I20} and 36 s {I2}
222RA8cP (1956As38, from |a activity); 38.0 s (1948St42)
222RA cP QP$From 2017Wa10
218RN N 1.0 1
218RN cN NR$From absolute gamma-ray intensity (per 100 decays of the parent)
218RN2cN of 324|g=2.77% {I8} (1969Pe17)
218RN PN 2
218RN L 0.0 0+ 33.75 MS 15
218RN A 6558 5 96.9 1 1.00
218RN cA E$recommended by 1991Ry01 from measurement of 1956As38. The original
218RN2cA energy has been increased by 4 keV because of change in calibration
218RN3cA energy.
218RN cA IA$weighted average of 96.95 {I5} (1969Pe17) and 96.8 {I2}
218RN2cA (1975VaZD).
218RN L 324.320 18 2+ 80 PS LT
218RN cL T$from |a|g(t) (1960Be25)
218RN cL J$|a|g(|q) (1956Sm88) establishes 0-2-0 (|a|g) cascade
218RN G 324.31 2 2.77 8 E2 0.1097
218RNS G KC=0.0582$LC=0.0382$MC=0.0100$NC=0.00260$OC=0.000537$PC=6.51E-5
218RN cG E$weighted average of 324.22 {I5} (1976Ku08) and 324.31 {I1}
218RN2cG (1995Ko54).
218RN cG RI$from 1969Pe17
218RN cG M$from |a(K)exp=0.059 (1974Va28)
218RN A 6239 5 3.05 5 1.44 6
218RN cA E$other: energy was measured by 1961Ru06 relative to E|a(g.s.) and
218RN2cA |DQ(|a)=326 {I4} was given.
218RN cA IA$from 1969Pe17. Others: 3.2% (1961Ru06), 4.1% {I12} (1963Le17),
218RN2cA 3.2% {I2} (1975VaZD). I|a=3.09% {I9} is deduced from level scheme
218RN L 653.12 19 (4+)
218RN G 328.9 2 0.0040 1 [E2] 0.1053
218RNS G KC=0.0565$LC=0.0363$MC=0.00948$NC=0.00247$OC=0.000510$PC=6.19E-5
218RN cG E$other: 328.9 {I2} (1976Ku08)
218RN cG RI$other: 0.0043 {I5} (1976Ku08)
218RN A 5916 5 0.0043 2 34.4 19
218RN cA $|a was not observed due to presence of interfering transitions
218RN2cA (1963Le17).
218RNF A FLAG=A
218RN L 796.911 21 (3-)
218RN G 144.4 5 1.1E-4 2 [E1] 0.190 4
218RNS G KC=0.1508 25$ LC=0.0299 5$ MC=0.00714 12$ NC=0.00184 3$
218RNS G OC=0.000387 7 $ PC=5.09E-5 9
218RN cG E$weighted average of 144.0 {I5} (1976Ku08) and 144.8 {I5}
218RN2cG (1995Ko54).
218RN cG RI$from 1976Ku08. Other: <0.00025 {I7} (1995Ko54)
218RN G 472.59 1 0.0039 1 [E1] 0.0124
218RNS G KC=0.0101$LC=0.00171$MC=0.00040$NC=0.000104$OC=2.25E-5$PC=3.17E-6
218RN cG E$other: 472.5 {I1} (1976Ku08)
218RN cG RI$other: 0.0040 {I3} (1976Ku08)
218RN cG M$possibly E1 from |a(K)exp|?0.01 (|a(ce) and |a|g coin data of
218RN2cG 1963Le17); but a definitive assignment could not be made from the
218RN3cG available data (according to private communication from author of
218RN4cG 1963Le17 to 1987El12)
218RN G 796.8 2 0.000175 [E3] 0.0333 ?
218RNS G KC=0.0219$LC=0.00849$MC=0.00217$NC=0.000569$OC=0.0001202$PC=1.579E-5
218RN cG E,RI$from 1995Ko54 only, probably contributed by coincidental summing
218RN2cG of 472|g and 324|g
218RN A 5775 5 0.0043 2 7.1 4
218RN cA IA$other: 0.007% (1963Le17) from |g|a coin.
218RNF A FLAG=A
218RN L 840.172 18 (3-)
218RN G 515.83 3 0.001428 (E1) 0.0103
218RNS G KC=0.00847$LC=0.00142$MC=0.00033$NC=8.64E-5$OC=1.87E-5$PC=2.64E-6
218RN cG $|a(K)exp|?0.025 (1963Le17)
218RN cG E$other: 515.6 {I1} (1976Ku08)
218RN cG RI$other: 0.0015 {I1} (1976Ku08)
218RN cG M$from |a(K)exp
218RN G 840.18 2 0.0028 1 [E3] 0.0292
218RNS G KC=0.0197$LC=0.00714$MC=0.00182$NC=0.000476$OC=0.0001008$PC=1.333E-5
218RN cG E$other: 840.2 {I2} (1976Ku08)
218RN cG RI$other: 0.0025 {I2} (1976Ku08)
218RN A 5733 5 0.0043 1 4.37 16
218RN cA IA$other: 0.006% from |a|g coin (1963Le17)
218RNF A FLAG=A