81KR 81RB EC DECAY (30.5 M) 1977LI14 25NDS 202501
81KR H TYP=FUL$AUT=M. Shamsuzzoha Basunia$CIT=NDS 199, 271 (2025)$
81KR2 H CUT=1-Sep-2024$
81KR c Others: 1956Do52, 1969Ha03, 1981FrZY.
81KR c Only 1977Li14 and 1981FrZY report the decay
81KR2c of the 30.5-min isomer of {+81}Rb; others report the 4.571-h decay
81KR3c alone. The assignment to one or other isomer was made by 1977Li14 on
81KR4c the basis of half-lives of the |g's and coincidence
81KR5c measurements. However, while 1977Li14 found numerous |g's belonging to
81KR6c the 30.5-min decay, 1981FrZY found only the 49.6|g following the
81KR7c 30.5-min half-life. Consequently, this decay scheme
81KR8c probably should be accepted with caution.
81KR c 1977Li14: E|g, I|g, |g|g-coin, and internal conversion
81KR2c measurement; Ge(Li) (FWHM=2.5 keV at 1.33 MeV), |b spectrometer.
81KR c 1981FrZY: singles and coin spectra, measured with Ge(Li)
81KR2c (FWHM=2.5-3.5 keV at 1.33 MeV) and Si(Li), timing FWHM|?12 ns.
81KR cG |a(K)exp from |b spectra of 1977Li14, normalized so
81KR2cG |a(K)exp(446.15 transition)=0.00273 {I20} (adopted from (p,n|g)).
81KR cG E,RI From 1977Li14. On the intensity scale, I(|g{+|+})=1810
81KR2cG {I100} and I(86.6|g, {+81}Rb)=4630 {I200} (1977Li14).
81KR cG E(B) From {+81}Rb |e decay (4.571 h) data of 1977Li14.
81KR cL E From least-squares fit to E|g.
81KR cL J,T From Adopted Levels.
81KR DG CC$FROM BrIcc v2.3e (17-Jun-2020) 2008Ki07, "Frozen Orbitals" appr.
81KR N 0.054 12 0.021 5 47.62
81KR PN 1.0 3
81KR cN BR Using data in 1977Li14, based on {+81}Rb IT branching +
81KR2cN |e decay branching=100, using the data of IT
81KR3cN I|g(1+|a)=(4630 {I200}) |* (1+17.66 {I31})=86400 {I4000} and I|g(1+|a)
81KR4cN to g.s.=1840 {I400} in |e decay.
81KR cN NR$from |SI|g(1+|a) to g.s.=100 and decay mode branching.
81KR DE LOGFT,CK,CL,CM,CN$FROM BetaShape v2.4 (Jun-2024) 2019MO35.
81KR DE EAV,LOGFT$FROM BetaShape v2.4 (Jun-2024) 2023MO21.
81KR DE LOGFT,CK,CL,CM,CN$FROM BetaShape v2.4 (Jun-2024) 2019MO35.
81KR DE EAV,LOGFT$FROM BetaShape v2.4 (Jun-2024) 2023MO21.
81RB P 86.31 6 9/2+ 30.5 M 3 2239 5
81RB cP E,J,T from {+81}Rb Adopted Levels
81RB cP QP$from 2021Wa16
81KR G 1087 1 10.2 15
81KR G 1136 1 3.6 7
81KR G 1297.0 4 6.3 4
81KR L 0 7/2+ 2.13E+5 Y +16-26
81KR E ?
81KR cE TI 0.3 {I+4-3} from measured I(|g{+|+}), |b{++}/|e(theory) and
81KR2cE decay scheme.
81KR L 49.50 8 9/2+ 4.0 NS 4
81KR E 0.8 70.66 356.06 23 1.5 7
81KRS E EAV=547.0 22$CK=0.3889 41$CL=0.04440 47$CM+=0.00980 11
81KR cE E 2420 {I200} from 1956Do52; were there a g.s. branch, the
81KR2cE authors could not have resolved it from this one.
81KR G 49.5 1 660 35M1(+E2) 0.19 +12-191.3 6 C
81KR2 G %IG=0.75 22
81KRS G KC=1.1 5$LC=0.17 12$MC=0.028 19
81KRS G NC=0.0025 15
81KR cG Also present in {+81}Rb (4.571 h) |e decay.
81KR L 190.44 71/2- 13.10 S 2 M
81KR cL T from Adopted Levels.
81KR G 190.44 7 12.1 12E3 0.479 7
81KR2 G %IG=0.014 4
81KR cG E from Adopted Gammas
81KR3 G ECC=0.54 7
81KRS G KC=0.399 6$LC=0.0681 10$MC=0.01110 17
81KRS G NC=0.000985 15
81KR cG ECC from 1956Do52.
81KR cG |a(K)exp/(|a(L+...)exp|a(M)exp)=5.16 {I30} (1956Do52),
81KR2cG |a(K)exp/|a(LM)exp=3.6 {I5} (1969Ha03).
81KR L 456.88 10 5/2-
81KR G 266.2 5 0.1 AP [E2] 0.0258 4 B
81KR2 G %IG AP 1.1E-4
81KRS G KC=0.02270 35$LC=0.00266 4$MC=0.000429 7
81KRS G NC=4.17E-5 6
81KR G 456.9 1 7.4 14E1 1.22E-3 2 BC
81KR2 G %IG=0.0085 29
81KRS G KC=0.001080 15$LC=0.0001146 16$MC=1.852E-5 26
81KRS G NC=1.863E-6 26
81KR L 548.92 95/2+
81KR G 499.4 2 25.0 15 [E2] 0.00321 5 C
81KR2 G %IG=0.029 8
81KRS G KC=0.00284 4$LC=0.000314 4$MC=5.07E-5 7
81KRS G NC=5.04E-6 7
81KR cG Also present in {+81}Rb (4.571 h) |e decay.
81KR G 548.9 1 90 6 E2(+M1) 0.8 GE 0.0022021 C
81KR2 G %IG=0.103 31
81KRS G KC=0.00195 19$LC=0.000213 22$MC=3.45E-5 35
81KRS G NC=3.45E-6 34
81KR cG Also present in {+81}Rb (4.571 h) |e decay.
81KR L 636.74 123/2-
81KR G 446.3 1 18.0 20 E2+M1 0.44 +20-260.0030823 BC
81KR2 G %IG=0.021 6
81KRS G KC=0.00273 20$LC=0.000296 24$MC=4.8E-5 4
81KRS G NC=4.8E-6 4
81KR L 731.86 11 (5/2)+
81KR E 8.2E-4 340.055 237.80 18 0.056 19
81KRS E EAV=271.6 22$CK=0.8623 6$CL=0.10076 15$CM+=0.02229 14
81KR G 682.3 1 42.0 18 (E2) 1.30E-3 2 C
81KR2 G %IG=0.048 14
81KRS G KC=0.001153 16$LC=0.0001253 18$MC=2.028E-5 28
81KRS G NC=2.031E-6 28
81KR G 732.1 2 18 1 [M1,E2] 0.00099 9 C
81KR2 G %IG=0.021 6
81KRS G KC=0.00088 8$LC=9.4E-5 9$MC=1.53E-5 15
81KRS G NC=1.54E-6 14
81KR L 873.8 3 11/2+
81KR E 6.8E-4 300.022 107.13 19 0.023 8
81KRS E EAV=189.6 21$CK=0.8511 13$CL=0.09775 20$CM+=0.02160 14
81KR G 824.2 5 13 1 (M1+E2) -0.8 +4-6 7.35E-427
81KR2 G %IG=0.015 4
81KRS G KC=0.000653 24$LC=6.97E-5 29$MC=1.13E-5 5
81KRS G NC=1.14E-6 4
81KR G 873.8 3 7.7 6 E2 6.85E-410
81KR2 G %IG=0.0088 26
81KRS G KC=0.000608 9$LC=6.53E-5 9$MC=1.057E-5 15
81KRS G NC=1.063E-6 15
81KR L 934.50 22 11/2+ 0.19 PS 6
81KR E 6.2E-4 270.036 166.88 19 0.037 13
81KRS E EAV=163.8 21$CK=0.8622 9$CL=0.09910 17$CM+=0.02189 14
81KR G 885.0 2 32.7 14M1+E2 -0.4 1 6.09E-4 9 C
81KR2 G %IG=0.037 11
81KRS G KC=0.000541 8$LC=5.74E-5 9$MC=9.30E-6 15
81KRS G NC=9.41E-7 15
81KR L 981.74 13 (9/2+)
81KR E 5.6E-4 230.055 236.67 18 0.056 19
81KRS E EAV=144.0 21$CK=0.8681 7$CL=0.09984 15$CM+=0.02207 14
81KR G 932.4 2 32.7 14 C
81KR2 G %IG=0.037 11
81KR G 981.6 2 24.9 14 C
81KR2 G %IG=0.028 8
81KR L 1014.42 24
81KR G 465.5 3 18.0 20 C
81KR2 G %IG=0.021 6
81KR G 1014.4 4 10.3 7 C
81KR2 G %IG=0.0118 35
81KR L 1100.01 11 5/2+
81KR G 368.3 3 9.2 5 [M1,E2] 0.0064 20 C
81KR2 G %IG=0.0105 31
81KRS G KC=0.0057 18$LC=6.3E-4 21$MC=1.03E-4 34
81KRS G NC=1.02E-5 33
81KR G 463.3 3 18.0 20 [E1] 1.17E-3 2 C
81KR2 G %IG=0.021 6
81KRS G KC=0.001043 15$LC=0.0001107 16$MC=1.788E-5 25
81KRS G NC=1.799E-6 25
81KR G 551.5 155 2 [M1,E2] 0.0020434 C
81KR2 G %IG=0.0057 28
81KRS G KC=0.00181 30$LC=0.000197 35$MC=3.2E-5 6
81KRS G NC=3.2E-6 5
81KR cG E,RI from |g|g coin.
81KR G 643.6 15 1.6 8 [E1] 5.36E-4 8 @C
81KR2 G %IG=0.0018 11
81KRS G KC=0.000477 7$LC=5.04E-5 8$MC=8.14E-6 12
81KRS G NC=8.21E-7 12
81KR cG E,RI from |g|g coin.
81KR G 1099.9 2 64.2 27 C
81KR2 G %IG=0.073 22
81KR cG E 1981FrZY report E|g=1100.3 {I5}, tentatively assigned to
81KR3cG {+81}Kr, but associated with "long" T{-1/2} isomer.
81KR L 1206.44 20 7/2
81KR E 1.2E-6 60.020 86.95 17 0.020 7
81KRS E EAV=47.3 22$CK=0.87641 32$CL=0.10116 14$CM+=0.02236 14
81KR G 657.5 2 11.7 5 D+Q C
81KR2 G %IG=0.013 4
81KR G 1157.0 4 6.0 6 C
81KR2 G %IG=0.0069 21
81KR G 1206.0 15 1 LT ?
81KR L 1682.7 47/2,9/2,11/2(+)
81KR E 0.022 8 6.44 21 0.022 8
81KRS E CK=0.87463 34$CL=0.10263 16$CM+=0.02274 15
81KR G 1633.2 5 6.0 4 C
81KR2 G %IG=0.0069 20
81KR G 1682.7 4 13.1 8 C
81KR2 G %IG=0.015 4
81KR L 1687.9 37/2,9/2,11/2(+)
81KR E 0.023 8 6.41 22 0.023 8
81KRS E CK=0.87459 34$CL=0.10266 16$CM+=0.02274 15
81KR G 1638.4 4 10.8 7 C
81KR2 G %IG=0.012 4
81KR G 1687.9 4 9.1 7
81KR2 G %IG=0.0104 31
81KR L 1743.61 11(7/2)+
81KR E 0.34 125.15 21 0.34 12
81KRS E CK=0.87417 35$CL=0.10300 17$CM+=0.02283 15
81KR G 643.6 1 98 4 @C
81KR2 G %IG=0.112 33
81KR G 729.2 8 28 2 C
81KR2 G %IG=0.032 10
81KR cG E from |g|g coin; |g also present in {+81}Rb (4.571 h) |e
81KRxcG decay.
81KR G 761.9 2 8.0 6 C
81KR2 G %IG=0.0091 27
81KR G 1011 1 3 LT C
81KR2 G %IG LT 0.00343
81KR G 1194.6 2 95 4 C
81KR2 G %IG=0.109 32
81KR G 1286.9 4 5.9 4 C
81KR2 G %IG=0.0067 20
81KR G 1694.4 4 15.6 8 C
81KR2 G %IG=0.018 5
81KR G 1743.5 3 48.4 21
81KR2 G %IG=0.055 16
81KR L 1781.8 57/2,9/2,11/2(+)
81KR E 0.0065 AP6.8 AP 0.0065 AP
81KRS E CK=0.87383 36$CL=0.10327 17$CM+=0.02290 15
81KR G 1732 1 1 AP
81KR2 G %IG AP 0.0011
81KR cG E 1981FrZY report E|g=1732.4 {I5} for a |g ray with no isotopic
81KR2cG assignment.
81KR G 1781.8 5 4.7 4
81KR2 G %IG=0.0054 16
81KR L 1902.6 67/2,9/2,11/2(+)
81KR E 0.0057 206.65 22 0.0057 20
81KRS E CK=0.87232 40$CL=0.10447 20$CM+=0.02321 16
81KR G 1853 1 0.9 2
81KR2 G %IG=0.0010 4
81KR G 1902.6 7 4.1 4
81KR2 G %IG=0.0047 14