228RA 228FR B- DECAY 1998GU09,1982RU04,1982RUZW14NDS 201403
228RA H TYP=FUL$AUT=KHALIFEH ABUSALEEM$CIT=NDS 116, 163 (2014)$CUT=31-Dec-2012$
228RA N 0.0534 46 0.0534 46 1.0 1.0
228RA PN 3
228RA cN NR From |SI(|g+ce)(g.s.)=88 {I12} (I|b(g.s.)<24 from log|
228RA2cN {If{+1u}t}|>8.5). Note that 1982Ru04 adopt I|b(g.s.)=0 on the
228RA3cN assumption that J({+228}Fr)=3. J=2 was determined in a later
228RAxcN experiment.
228RA cN NR There has also been a suggestion that the 63.8|g may be
228RA2cN a doublet including a weak 63.31|g from the 537.49 level. From
228RA3cN intensity balance I(63.3|g)<1.8 which would make I(63.8|g)>15.7
228RA4cN and the normalization factor <0.0593. This limit is barely outside
228RA5cN the uncertainty of the normalization factor of 0.0534 {I46}.
228FR P 0 2- 38 S 1 4427 14
228RA c 1998Gu09: Two sets of conversion electron measurement have been
228RA2c performed. The first was carried using {+228}Fr source that was
228RA3c produced in a spallation reaction of {+238}UC{-2} induced by 600 MeV
228RA4c proton beams at CERN Synchrotron and extracted from other reaction
228RA5c channels with ISOLDE II Facility. |b|g|g(t) and second conversion
228RA6c electron measurements have carried using Francium produced by a
228RA7c spallation reaction in a {+232}ThC{-2} target induced by 1 GeV protons
228RA8c from the CERN PS-Booster.
228RA c 1982Ru04 and 1982RuZW report the results of the same study: |g-rays
228RA2c following |b-decay have been investigated (singles and |g|g
228RA3c coincidences) using Ge(Li) detectors. {+228}Fr source was
228RA4c produced in a spallation reaction of {+238}U induced by 600 MeV proton
228RA5c beams at CERN Synchrotron and extracted from other reaction channels
228RA6c with ISOLDE II Facility. Measured: E{-|g}, I{-|g}, and T{-1/2}.
228RA7c Obtained half life is in good agreement with the adopted value.
228RA cL J$ From 1998Gu09, up to the (3+) level at 1070 keV. J|p for
228RA2cL higher levels are from
228RA2cL 1982Ru04. The conversion electron and the fast timing data
228RA3cL confirm the previously tentatively assigned spins
228RA cL T$ From 1998Gu09 from |b|g|g(t) method, except otherwise noted.
228RA CL $Level lifetime was measured with the |b|g|g(t) method. NE111A
228RA2CL plastic scintillator detector was used as fast response detector to |b,
228RA3CL BaF{-2} as fast response |g-detector, and two Ge for |g rays.
228RA4CL Time information was obtained from the time-delayed between the fast
228RA5CL response |b{+-} and |g-detectors, while the other two Ge detectors were
228RA6CL used to select the desired decay branch.
228RA cL E From a least-squares fit to the E|g
228RA cL E$A 0+ level at 981.1 keV is proposed by 1998Gu09 based on observing
228RA2cL electron peak at 150.0 keV. The peak is interpreted as the
228RA3cL K-line of 259.9 keV, E0 transition. The upper limit of I|g of the
228RA5cL transition is 0.3 with respect to I|g(E|g=140.86). Further support for
228RA6cL this transition comes from the measured |a(K/L1+L2) of 4.3(14) that is
228RA7cL comparable to the theoretical prediction of 5.30. The state is not
228RA8cL placed in the level scheme since no evidence for |g-rays connecting any
228RA9cL other level. For details see the discussion in 1998Gu09.
228RA CL BAND(A) KPI=0+ GS BAND
228RA CL BAND(B) KPI=0- OCTUPOLE-VIBRATIONAL BAND
228RA CL BAND(C) KPI=SECOND 0+ BAND
228RA CL BAND(D) KPI=2+? BAND
228RA CL BAND(E) KPI=SECOND 2+ BAND
228RA cB IB The I|b from I(|g+ce) imbalance at each level with
228RA2cB I|b(g.s.)<24% from log| {If{+1u}t}>8.5.
228RA cG E,RI$ From 1982RuZW, except otherwise noted.
228RA cG RI(A) From coincidence spectrum
228RA cG E(C) Weighted average of value from {+228}Fr |b{+-} decay and
228RA2cG authors' unpublished data from {+232}Th |a decay. Neither value is
228RA3cG given separately
228RA cG E(D),RI(D)$From coincidence measurements (1982RuZW)
228RA cG M(B) Existence and multipolarity of 167|g and E0 component
228RA2cG in 171|g inferred from excess of K| x ray in coincidence spectrum
228RA3cG gated by the 782, 835 and 846 |g's (1982Ru04)
228RA cG M$ From 1998Gu09 based on conversion electron, except otherwise noted.
228RA G 365.64 6 5.2 4
228RA G 377.5 2 0.9 2
228RA G 379.0 2 1.0 2
228RA G 405.91 8 3.2 3
228RA G 595.8 1 2.0 2
228RA G 751.5 3 2.9 3
228RA G 767.1 5 2.4 4
228RA G 790.5 5 1.9 2
228RA G 852.5 5 2.9 3
228RA G 919.5 3 6.2 5
228RA G 925.8 2 19.8 10
228RA G 983.6 3 6.7 4
228RA G 1005.0 5 9.9 20
228RA G 1048.8 10 5.4 5
228RA G 1083.2 10 5.2 5
228RA G 1137.3 10 4.3 5
228RA G 1180.3 10 3.0 5
228RA G 1206.0 15 3.4 6
228RA G 1224.6 5 8.6 5
228RA G 1234.9 15 3.5 7
228RA G 1246.6 10 7.4 5
228RA G 1259.5 10 6.4 5
228RA G 1310.9 10 5.3 5
228RA G 1332.6 10 5.7 5
228RA G 1342.7 10 3.0 6
228RA G 1359.2 15 2.3 4
228RA G 1429.2 15 3.2 6
228RA G 1468.0 10 3.9 4
228RA G 1484.8 15 3.6 7
228RA G 1487.7 15 2.7 5
228RA G 1491.8 15 3.0 3
228RA G 1532.2 15 4.9 4
228RA G 1644.2 10 5.8 5
228RA G 1656.7 15 3.0 3
228RA G 1695.6 10 4.3 4
228RA G 1715.5 10 5.4 4
228RA G 1725.9 15 2.8 3
228RA G 1754.8 10 6.2 12
228RA G 1800.5 15 3.2 3
228RA G 1811.3 10 8.6 6
228RA G 1844.8 10 10.4 7
228RA G 1858.8 10 3.1 3
228RA G 1865.5 15 2.0 5
228RA G 1879.3 15 2.1 6
228RA G 1885.9 10 8.3 6
228RA G 1930.5 10 7.9 5
228RA G 1943.4 10 5.2 4
228RA G 1991.5 10 5.5 10
228RA G 1996.0 15 5.2 10
228RA G 2007.0 10 4.4 7
228RA G 2033.7 10 14.2 14
228RA G 2063.2 10 4.3 4
228RA G 2077.6 10 11.1 11
228RA G 2114.1 10 5.1 5
228RA G 2131.4 10 7.7 6
228RA G 2156.0 15 2.8 4
228RA G 2170.7 15 2.5 4
228RA G 2177.8 10 6.4 7
228RA G 2181.7 15 3.1 5
228RA G 2193.8 15 1.6 3
228RA G 2206.7 15 2.3 3
228RA G 2219.8 15 1.9 5
228RA G 2283.4 15 3.1 5
228RA G 2286.6 15 4.4 5
228RA G 2392.3 10 4.5 6
228RA G 2414.2 10 10.8 9
228RA G 2442.9 15 3.6 4
228RA G 2454.3 15 3.9 4
228RA L 0 0+ A
228RA B 12 11 8.9 4 1U
228RAS B EAV=1702.8 61
228RA cB IB from log| {If{+1u}t}|>8.5
228RA L 63.823 20 2+ 550 PS 20 A
228RA CL J$E2 |g-ray to 0+; member of g.s. band
228RA CL T$Also obtained from shape de-convolution measurement which is in
228RA2CL full agreement with the value obtained using |b|g|g(t) method.
228RA B 22 8 6.89 16
228RAS B EAV=1716.2 60
228RA G 63.83 2 17.5 15 E2 81.9 CC
228RAS G LC=59.9$ MC=16.2$ NC+=5.82
228RA cG M |a(exp)=133 {I40} (from I(322|g)(63.8|g)/I(322|g)(141|g),
228RA2cG assuming the 141|g is E2)
228RA cG M$ from (L1+L2)/L3/M/(N+...)=100/83.5 23/60 4/18.7 20;
228RA2cG theory: (100/82.5/50/15.6) for E2 |g-ray (1998Gu09)
228RA L 204.68 3 4+ 181 PS 3 A
228RA cL J$ E2 |g-ray to 2+; member of g.s. band
228RA CL T$Also obtained from shape de-convolution measurement which is in
228RA2CL full agreement with the value obtained using |b|g|g(t) method.
228RA B 7.8 18 8.94 11 1U
228RAS B EAV=1614.5 61
228RA G 140.86 2 100 9 E2 2.30 CC
228RA3 G BE2=17.16E+3 37$BE2W=207 4
228RA cG M$(L1+L2)/L3/M/(N+...)=100/57.4 34/39.6 27/13.6 16; theory:
228RA3cG (100/56.9/37.7/15.1),|a(K)exp=0.27 {I5};|a(K)theory=0.29 for E2
228RA4cG (1998Gu09).
228RAS G KC=0.287$ LC=1.47$ MC=0.400$ NC+=0.145
228RA L 411.68 5 (6+) A
228RA cL J$ possible member of g.s. band
228RA G 206.98 4 4.7 4 [E2] 0.527 C
228RAS G KC=0.154$ LC=0.274$ MC=0.0737$ NC+=0.0264
228RA L 474.18 4 1- 7 PS LE B
228RA cL J$E1 |g-ray to 2+
228RA cL T$Represents average of four independent measurements. 2|s limit
228RA B 7.16 6 7.209 14
228RAS B EAV=1541.8 60
228RA G 410.40 6 115 6 E1 0.0179 C
228RA3 G BE1W GE 1.5E-4
228RA CG M$|a(K)exp=0.017 {I3} (1998Gu09);|a(K)theory=0.015 for E1
228RAS G KC=0.0145$ LC=0.00255$ MC=0.00060$ NC+=0.00021
228RA G 474.0 1 140 26 [E1] 0.0133 AC
228RA3 G BE1W GE 1.2E-4
228RAS G KC=0.0108$ LC=0.00187$ MC=0.00044$ NC+=0.00015
228RA L 537.49 4 3- 6 PS LE B
228RA CL J$E1 |g-ray to 4+
228RA cL T$ Represents average of ten time-delayed measurements. 2|s limit
228RA B 7.4 13 7.17 8
228RAS B EAV=1514.9 60
228RA G 332.91 5 47 3 E1 0.0280 C
228RA3 G BE1W GE 1.5E-4
228RA cG M$ |a(K)exp=0.032 {I7};|a(K)theory=0.023 for E1 (1998Gu09)
228RAS G KC=0.0226$ LC=0.00409$ MC=0.00097$ NC+=0.00034
228RA G 473.7 1 187 20 [E1] 0.0133 AC
228RA3 G BE1W GE 2.2E-4
228RAS G KC=0.0108$ LC=0.00187$ MC=0.00044$ NC+=0.00015
228RA L 655.96 5 (5-) B
228RA cL J$ |g's to 4+ and (6+). Probable member of K=0 octupole band
228RA G 244.4 1 0.9 2 [E1] 0.0567 C
228RAS G KC=0.0454$ LC=0.00853$ MC=0.00203$ NC+=0.00071
228RA G 451.20 6 18.6 10 [E1] 0.0147 C
228RAS G KC=0.0119$ LC=0.00207$ MC=0.00049$ NC+=0.00017
228RA L 721.19 8 0+ C
228RA CL J$E0 |g-ray to 0+
228RA G 247.01 8 2.1 2 [E1] 0.0553 C
228RAS G KC=0.0443$ LC=0.00831$ MC=0.00198$ NC+=0.00069
228RA G 657.4 2 4.8 3 [E2] 0.0211
228RAS G KC=0.0151$ LC=0.00453
228RA G 721.2 5 E0 S
228RA CG E$proposed by 1998Gu09 based on conversion electron spectrum.
228RA CG M$|a(K)exp GE 1.4 ;|a(K)theory=0.0048 for E1, 0.057 for M1, and
228RA2CG 0.013 for E2 (1998Gu09)
228RA L 770.71 4 2+ C
228RA CL J$Strong E0 component of E0+M1+E2 |g-ray to 2+ state of the g.s. band.
228RA B 1.85 19 7.66 5
228RAS B EAV=1415.8 60
228RA G 233.25 4 7.0 6 [E1] 0.0632 C
228RAS G KC=0.0506$ LC=0.0096$ MC=0.00228$ NC+=0.00079
228RA G 296.53 5 7.6 7 [E1] 0.0363 C
228RAS G KC=0.0293$ LC=0.00536$ MC=0.00128$ NC+=0.00044
228RA G 565.8 1 6.4 4 [E2] 0.0293 C
228RAS G KC=0.0200$ LC=0.00698
228RA G 706.9 1 9.1 5 E0+M1+E2 0.55 8
228RA CG M$|a(K)exp=0.55 {I8};|a(K)theory=0.0.0049 for E1, 0.061 for M1, and
228RA2CG 0.013 for E2 (1998Gu09)
228RAS G KC=0.037 24$ LC=0.007 4
228RA G 770.7 1 12.0 6 [E2] 0.0150
228RAS G KC=0.0113$ LC=0.00296
228RA L 846.14 9 2+ D
228RA CL J$E0 |g-ray from 2+
228RA B 3.0 3 7.42 5
228RAS B EAV=1383.8 60
228RA G 782.3 1 38.8 20 M1+E2 0.034 20 C
228RA CG M$|a(K)exp=0.012 {I5};|a(K)theory=0.0041 for E1, 0.046 for M1, and
228RA2CG 0.010 for E2 (1998Gu09)
228RAS G KC=0.029 18$ LC=0.006 3
228RA G 846.2 2 27.8 14 [E2] 0.0125
228RAS G KC=0.0095$ LC=0.00234
228RA L 880.30 6 4+ C
228RA CL J$Strong E0 component of E0+M1+E2 |g-ray to 4+ level of the g.s. band.
228RA B 0.19 5 10.11 12 1U
228RAS B EAV=1325.9 60
228RA G 224.35 8 2.3 2 [E1] 0.0693 C
228RAS G KC=0.0554$ LC=0.0105$ MC=0.00251$ NC+=0.00087
228RA G 342.88 6 4.8 4 [E1] 0.0263 C
228RAS G KC=0.0212$ LC=0.00382$ MC=0.00091$ NC+=0.00032
228RA G 468.4 1 1.0 3 [E2] 0.0459 C
228RAS G KC=0.0290$ LC=0.0126$ MC=0.00324$ NC+=0.00116
228RA G 675.6 5 2.1 3 E0+M1+E2 1.3 3
228RA CG M$|a(K)exp=1.3 {I3};|a(K)theory=0.0.0054 for E1, 0.068 for M1, and
228RA2CG 0.014 for E2 (1998Gu09)
228RAS G KC=0.04 3$ LC=0.008 4
228RA L 898.85 8 (3+) D
228RA B 1.7 8 7.64 21
228RAS B EAV=1361.4 60
228RA G 694.2 1 11.2 6 [M1,E2] 0.05 3 C
228RAS G KC=0.039 25$ LC=0.008 4
228RA G 835.0 2 53 3 [M1,E2] 0.031 18 C
228RAS G KC=0.024 15$ LC=0.0047 24
228RA L 966.99 19 (2+,4+)
228RA G 762.4 2 11.9 6 C
228RA L 1013.24 14 2+ E
228RA CL J$E0 |g-ray to 2+
228RA B 2.8 4 7.37 7
228RAS B EAV=1312.9 60
228RA G 167.1 3 0.5 LT E0 7.4 APB
228RA2 G FLAG=D
228RA cG TI I(|g+ce)/I|g(949)|?0.095 from I(K| x ray) in |g|g (1982RuZW)
228RA G 949.4 2 78 4 [M1,E2] 0.022 13 C
228RAS G KC=0.018 10$ LC=0.0034 16
228RA G 1013.7 10 2.0 5 &
228RA L 1042.01 11(0+)
228RA B 0.21 4 8.48 9
228RAS B EAV=1300.7 60
228RA G 567.8 1 10.0 5 C
228RA L 1052.78 13(2+,3,4+)
228RA B 1.30 15 7.68 6
228RAS B EAV=1296.1 60
228RA G 172.4 2 0.6 1
228RA G 515.2 2 3.2 8 C
228RA G 989.8 3 31.1 16
228RA L 1070.23 7 (3+) E
228RA B 3.6 8 7.23 10
228RAS B EAV=1288.7 60
228RA G 171.4 1 1.8 2 E0+M1+E2 16 7 B
228RA CG M$ From CC(L1+L2)(exp)=1.0 {I3}; theory: 0.017 for E1, 0.41 for E2,
228RA2CG and 0.53 for M1. These values reveal strong component of E0 (1998Gu09)
228RA cG CC from |a(K)exp (value not given) from I(K| x ray) in |g|g and
228RA2cG |a/|a(K) (theory, value not given)
228RA G 532.68 8 2.0 2 [E1] 0.0105
228RAS G KC=0.0085$ LC=0.00146
228RA G 865.8 2 18.0 9 [M1,E2] 0.027 15 C
228RAS G KC=0.022 14$ LC=0.0043 21
228RA G 1006.5 5 17.1 25 C
228RA L 1087.28 7 (1-,2,3-)
228RA B 2.13 23 7.45 5
228RAS B EAV=1281.5 60
228RA G 549.83 7 23.8 17 C
228RA G 613.06 8 25.2 13 C
228RA L 1109.10 19(2+,3,4+)
228RA B 0.64 9 7.96 7
228RAS B EAV=1272.2 60
228RA G 904.4 2 19.0 10 C
228RA L 1157.59 21(2+,3,4+)
228RA B 1.11 13 7.69 6
228RAS B EAV=1251.7 60
228RA G 952.9 3 8.6 6 C
228RA G 1092.8 5 22.4 12 C
228RA L 1182.26 8 (3-,4+)
228RA B 0.62 6 7.93 5
228RAS B EAV=1241.2 60
228RA G 526.22 8 2.7 2 C
228RA G 644.9 1 8.9 5 C
228RA L 1219.97 13(2+)
228RA B 0.12 6 8.63 22
228RAS B EAV=1225.3 60
228RA G 498.8 1 1.6 2 [E2] 0.0394
228RAS G KC=0.0256$ LC=0.0103$ MC=0.00164$ NC+=0.00094
228RA G 1015.7 8 4.5 10 C
228RA L 1238.5 3 (0+,1,2,3-)
228RA B 1.64 16 7.48 5
228RAS B EAV=1217.4 60
228RA G 764.5 3 6.6 4 C
228RA G 1174.2 5 24.1 12
228RA L 1349.5 4 (4+)
228RA B 0.49 6 9.33 6 1U
228RAS B EAV=1128.6 59
228RA G 937.6 5 2.7 3 [E2] 0.0103
228RAS G KC=0.00789$ LC=0.00182
228RA G 1145.0 5 6.4 6 C
228RA L 1471.75 12(1-,2,3,4+)
228RA B 0.67 7 7.74 5
228RAS B EAV=1118.8 59
228RA G 625.6 1 3.3 2
228RA G 934.3 2 6.3 4 C
228RA G 1406.4 15 3.0 6
228RA L 1495.34 13(1+,2,3,4+)
228RA B 0.32 6 8.05 9
228RAS B EAV=1108.9 59
228RA G 425.1 1 1.1 2
228RA G 1432.9 15 4.8 8
228RA L 1507.14 17(2+,3-)
228RA B 0.55 10 7.81 8
228RAS B EAV=1103.9 59
228RA G 493.9 1 2.4 2
228RA G 1033.0 10 7.9 15
228RA G 1303.1 10 3.7 4 C
228RA L 1518.87 21(0+,1,2,3-) ?
228RA B 1.38 25 7.40 8 ?
228RAS B EAV=1099.0 59
228RA G 551.9 1 1.8 3
228RA G 1043.2 8 20 4
228RA G 1454.7 10 4.0 4
228RA L 1579.8 3 (1-,2,3-)
228RA B 1.38 25 7.36 8
228RAS B EAV=1073.3 59
228RA G 422.3 2 1.5 2
228RA G 1041.6 8 10 2
228RA G 1105.6 8 11.6 7
228RA G 1514.9 15 2.7 3
228RA L 1911.82 161,2+
228RA B 2.34 23 6.93 5
228RAS B EAV=933.9 59
228RA G 824.4 5 4.4 3
228RA G 869.7 2 6.1 4 C
228RA G 898.7 2 15.1 8
228RA G 1013.7 10 2.0 5 &
228RA G 1190.8 15 4.1 8
228RA G 1847.5 10 7.0 10
228RA G 1911.5 10 5.2 4 &
228RA L 1974.61 241,2+
228RA B 1.79 17 7.00 5
228RAS B EAV=907.6 59
228RA G 816.5 3 8.7 5
228RA G 922.3 3 10.5 6
228RA G 1501.6 15 3.8 4
228RA G 1911.5 10 5.2 4 &
228RA G 1973.8 10 5.3 4
228RA L 2041.1 3(2+)
228RA B 1.89 18 6.93 5
228RAS B EAV=879.9 59
228RA G 821.7 5 3.8 3 [M1,E2] 0.030 18
228RAS G KC=0.025 15$ LC=0.0049 24
228RA G 1027.2 5 4.9 10
228RA G 1162.0 10 6.5 6
228RA G 1194.2 15 3.3 6 &
228RA G 1318.8 10 3.7 7
228RA G 1566.9 10 13.0 8 C
228RA L 2107.93 19 (2+,3,4+)
228RA B 1.05 12 7.14 6
228RAS B EAV=852.0 59
228RA G 600.8 1 3.7 2
228RA G 1902.8 10 2.9 3
228RA G 2043.5 10 13.0 13
228RA L 2110.8 4 (2,3-)
228RA B 5.4 6 6.43 5
228RAS B EAV=850.8 59
228RA G 1001.6 5 3.3 5
228RA G 1024.4 10 4.8 10
228RA G 1096.9 8 14.8 8
228RA G 1211.5 15 2.5 5
228RA G 1340.2 10 5.0 10
228RA G 1572.4 10 25.6 16 C
228RA G 1637.7 10 4.4 4
228RA G 2047.8 10 41 4 C
228RA L 2138.3 6 2+
228RA B 1.22 13 7.05 5
228RAS B EAV=839.4 59
228RA G 1171.0 10 7.4 6
228RA G 1601.1 15 4.3 8 C
228RA G 1663.7 15 3.9 5
228RA G 1934.8 15 3.8 3
228RA G 2137.8 15 3.4 4
228RA L 2161.3 5 2+
228RA B 2.29 24 6.76 5
228RAS B EAV=829.8 59
228RA G 1052.4 10 3.7 5
228RA G 1194.2 15 3.3 6 &
228RA G 1390.8 10 4.0 4
228RA G 1955.9 10 5.2 4 C
228RA G 2097.4 10 23.1 23
228RA G 2162.4 15 3.5 5
228RA L 2168.2 7 (2+,3,4+)
228RA B 0.89 10 7.17 6
228RAS B EAV=827.0 59
228RA G 1631.0 15 2.6 4
228RA G 1963.0 10 4.7 4 C
228RA G 2104.7 10 9.4 9