204HG 204AU B- DECAY 1984CR01 10NDS 201002
204HG H TYP=FUL$AUT=C.J. CHIARA and F.G. KONDEV$CIT=NDS 111,141 (2010)$
204HG2 H CUT=1-Oct-2009$
204HG c 1984Cr01: {+204}Au parent produced via {+204}Hg(n,p) reaction; natural
204HG2c Hg target; E(n)=14 MeV. Measured |g singles with Ge, |g|g coin
204HG3c with Ge-Ge(Li); |DE=1.7 and 2.3 keV at 1332 keV for Ge and Ge(Li),
204HG4c 10% efficiency for both;
204HG5c 2-min irradiation followed by 30-35 s delay and 2 min count.
204HG6c Measured |g(t) spectra for E|g in
204HG7c 400-1000 keV or 1800-2400 keV range, in 6 {I15}-s intervals;
204HG8c T{-1/2}({+204}Au) determined from |g(t) of 436.6|g, 691.7|g, and
204HGxc 723.0|g.
204HG c Other: 1972Pa06.
204HG6D 287 irradiation's for G singles, 350 for GG coin, 140 for G(T);
204HG3D they used Q(B-) = 4500 keV from 1982AuAA (priv.comm.) mass estimates;
204HG4D 1128.30 16 est'd as second excited state (was uncertain in 1972Pa06);
204HG5D estimated x-sec 0.63(8) mb;
204HG6D >10% B- to g.s. gives too large x-sec compared to 202Hg, assume <10%;
204HG7D 0% to g.s. used to calc log(ft) and B- branches (by evaluator, too);
204HG8D only 0+ and 2+ are firmly assigned, all other Jpi's are tentative in
204HG9D 1984Cr01!
204HG cB $1972Pa06 measured with a plastic scin an endpoint energy |?3300 keV
204HG2cB with T{-1/2}=30-40 s, which can be associated with decay of
204HG3cB {+202,204}Au. Based on evaluators' estimate of relative yields of the
204HG4cB 436.6|g ({+204}Au) and 439.6|g ({+202}Au, normalized to account for
204HG5cB 90% |b{+-} to g.s.) from Fig.1 of 1972Pa06, this is consistent with
204HG6cB Q(|b{+-})({+202}Au)=2950 keV and systematic Q(|b{+-})({+204}Au)=3900
204HG7cB keV. 1967Wa23 report E(|b{+-})=3500 keV {I200} with T{-1/2}|?30 s and
204HG8cB E(|b{+-})=4500 keV {I300} with T{-1/2}|?4 s; decay with the latter
204HG9cB lifetime was not confirmed by 1972Pa06 or 1984Cr01. 1984Cr01 deduce
204HG0cB I|b{+-} to g.s.<10% from estimate of (n,p) cross sections; other
204HGacB I|b{+-} branches are from |g+ce intensity balance, assuming negligible
204HGxcB feeding to g.s.
204HG cB $The total energy calculated with the program RADLST for |b{+-} decay
204HG2cB of {+204}Au is 4267 keV 155, compared to the Q value from systematics,
204HG3cB 3940 keV, indicating that the decay scheme is incomplete
204HG DG CC$ FROM BrIcc v2.2 (31-Mar-2008) 2008KiAA, "Frozen Orbitals" appr.
204HG cG E$From 1984Cr01, with assignment to {+204}Au |b{+-} decay based on
204HG2cG T{-1/2} and on |g|g-coin; other: 1972Pa06. For E|g<400 keV,
204HG3cG sensitivity was reduced by Pb absorbers; |g|g not recorded if E|g<400
204HGxcG keV.
204HG cG $All intense |g's are in coin with E|b>500 keV (1972Pa06).
204HG cG E(D)$Assigned to both {+204}Au and {+202}Au (1984Cr01).
204HG cG M$From adopted |g's.
204HG cL E$From a least-squares fit to E|g.
204HG cL J$From adopted levels.
204AU P 0.0 (2-) 39.8 S 9 3940
204HG N 0.91 4 1.00 1.00
204HG cN NR$Based on the assumption that I|b{+-} to g.s. is negligible and
204HG2cN |SI(|g+ce)(to g.s.)=100%
204HG G 654.9 4 9.0 8 D
204HG cG $T{-1/2}=70 s {I20}; 1984Cr01 suggest possibility this may be due to
204HG2cG 53 s {I2}, E|g |? 690 keV from {+203}Au |b{+-} decay (1972Bu42).
204HG3cG However, no such |g was later confirmed to be from {+203}Au |b{+-}
204HG4cG decay (see 2005Ko20); evaluator rejects this possible origin.
204HG G 1817.4 6 0.16 7
204HG L 0 0+
204HG B 10 LT 8.5 GT 1U?
204HGS B EAV=1541.47
204HG L 436.552 8 2+
204HG B 2 LT 7.4 GT
204HGS B EAV=1386.43
204HG cB IB$No feeding to this level was deduced from either 1984Cr01 or
204HG2cB 1972Pa06. In both works, more |g intensity was identified feeding this
204HG3cB level than depopulating it.
204HG G 436.551 8 100 4 E2 0.0378
204HGS G KC=0.0263 4$LC=0.00870 13$MC=0.00216 3$NC+=0.000636 9
204HGS G NC=0.000538 8$OC=9.50E-5 14$PC=3.47E-6 5
204HG cG E$From adopted gammas. E|g=436.56 keV {I5} in 1984Cr01
204HG DG $%IG=91.3 3, using the calculated normalization.
204HGSDG $KC=0.0263 4$LC=0.00870 13$MC=0.00216 3$NC+=0.000636 9
204HGSDG $NC=0.000538 8$OC=9.50E-5 14$PC=3.47E-6 5
204HG L 1128.23 114+
204HG DL J$1984Cr01: no decay to 0+, so J=0 or >2; (4+) from systematics
204HG B 0.7 LT 8.8 GT 1U?
204HGS B EAV=1053.00
204HG G 691.74 15 26.4 8 E2 0.01285
204HGS G KC=0.00991 14$LC=0.00224 4$MC=0.000538 8$NC+=0.0001603 23
204HGS G NC=0.0001345 19$OC=2.45E-5 4$PC=1.313E-6 19
204HG DG $KC=0.00991 14$LC=0.00224 4$MC=0.000538 8$NC+=0.0001603 23
204HGSDG NC=0.0001345 19$OC=2.45E-5 4$PC=1.313E-6 19
204HG L 1828.71 11 (2-)
204HG DL J$1984Cr01: (2+,3+) Although no G to GS observed, 2+ assignment may
204HG2DL be valid because similar situation exists in 200Hg, with rather weak
204HG3DL second 2+ to 0+ decays.
204HG B 21.7 12 5.5 AP
204HGS B EAV=783.43
204HG DB $originally: 21.7 12
204HGSDB EAV= 766.45 $
204HG G 1392.15 11 24.2 6 (E1)
204HGS G CC=0.001391 20$KC=0.001080 16$LC=0.0001589 23$MC=3.63E-5 5$NC+=0.000115
204HGS G NC=9.08E-6 13$OC=1.714E-6 24$PC=1.320E-7 19$IPC=0.0001042 15
204HG L 1841.38 11 1+
204HG DL J$1984Cr01: Similar decay strength to g.s. and 2+ at 437, so J=1
204HG2DL proposed; no (-) states expected below 3-, so 1+.
204HG B 3.8 6 6.3 AP
204HGS B EAV=778.05
204HG DB $originally: 6.5 4 6.00 3
204HGSDB EAV= 761.07
204HG G 1404.82 12 4.24 20M1+E2
204HGS G CC=0.0048 17$KC=0.0040 14$LC=0.00064 21$MC=0.00015 5$NC+=0.00010 3
204HGS G NC=3.7E-5 12$OC=7.1E-6 23$PC=5.3E-7 20$IPC=5.0E-5 12
204HG G 1841.38 19 2.91 11M1
204HGS G CC=0.00357 5$KC=0.00271 4$LC=0.000429 6$MC=9.90E-5 14$NC+=0.000339 5
204HGS G NC=2.48E-5 4$OC=4.71E-6 7$PC=3.70E-7 6$IPC=0.000310 5
204HG DG %IG=2.66 14, using the calculated normalization.
204HG L 1851.26 10 (2,3)+
204HG DL J$1984Cr01: decays to 2+, (4+) suggest (3+), but if 1851 to g.s., (2+).
204HG B 31.5 16 5.3 AP
204HGS B EAV=773.85
204HG G 723.00 16 24.4 7 M1+E2 0.023 12
204HGS G KC=0.019 10$LC=0.0033 14$MC=0.0008 3$NC+=0.00024 10
204HGS G NC=0.00020 8$OC=3.7E-5 15$PC=2.6E-6 14
204HG G 1414.72 11 9.6 3 M1+E2
204HGS G CC=0.0048 17$KC=0.0039 14$LC=0.00063 21$MC=0.00015 5$NC+=0.00010 3
204HGS G NC=3.7E-5 12$OC=6.9E-6 23$PC=5.3E-7 20$IPC=5.3E-5 13
204HG G 1851.7 4 0.28 LE D ?
204HG DG %IG=0.13 13, using the calculated normalization.
204HG L 1947.69 11 2+
204HG DL J$1984Cr01: decay to g.s. suggests 2+.
204HG B 26.5 14 5.3 AP
204HGS B EAV=733.07
204HG G 1511.10 12 27.7 7 [M1+E2]
204HGS G CC=0.0041 14$KC=0.0034 11$LC=0.00054 17$MC=0.00013 4$NC+=0.00013 4
204HGS G NC=3.1E-5 10$OC=5.9E-6 19$PC=4.5E-7 16$IPC=8.9E-5 22
204HG G 1947.76 20 1.47 11[E2]
204HGS G CC=0.00197 3$KC=0.001432 20$LC=0.000227 4$MC=5.24E-5 8$NC+=0.000259 4
204HGS G NC=1.311E-5 19$OC=2.47E-6 4$PC=1.85E-7 3$IPC=0.000243 4
204HG DG %IG=1.34 12, using the calculated normalization.
204HG L 1989.36 10 (2+)
204HG DL J$1984Cr01: moderately fed by B-, primarily decays to first 2+, no
204HG2DL decay to g.s. observed, but may be weak, hence (2+,3+-).
204HG B 5.9 4 6.0 AP
204HGS B EAV=715.48
204HG DB $If JPI=4+ for this level, decay would be 1u with LOGFT=6.93 3, which
204HG2DB is unlikely.
204HG G 1552.8 1 6.51 19
204HG cG E$From adopted gammas
204HG L 2088.51 10 2+
204HG DL J$1984Cr01: "purely speculative" ass't would be (1+), decays to g.s.
204HG B 1.05 8 6.6 AP
204HGS B EAV=673.79
204HG G 2088.5 1 1.15 7 E2
204HGS G CC=0.00183 3$KC=0.001263 18$LC=0.000198 3$MC=4.57E-5 7$NC+=0.000322 5
204HGS G NC=1.144E-5 16$OC=2.16E-6 3$PC=1.631E-7 23$IPC=0.000308 5
204HG cG E$From adopted gammas
204HG DG %IG=1.05 8, using the calculated normalization.
204HG L 2117.0 5 2+
204HG DL J$1984Cr01: state not assigned. Added by Schmorak based on re-placed
204HG2DL 1680 according to (n,n'g).
204HG B 0.20 7 7.3 AP
204HGS B EAV=661.85
204HG G 1680.4 5 0.22 7 M1+E2
204HGS G CC=0.0034 10$KC=0.0026 8$LC=0.00042 12$MC=0.00010 3$NC+=0.00020 5
204HGS G NC=2.4E-5 7$OC=4.6E-6 14$PC=3.5E-7 12$IPC=0.00017 4
204HG cG E$placed by evaluators based on the 1680.9|g in adopted gammas.
204HG DG E$from (N,N'G)
204HG L 2140.86 10 (1+,2+,3+)
204HG DL J$1984Cr01: moderately fed by B-, primarily decays to first 2+, no
204HG2DL decay to g.s. observed, but may be weak.
204HG B 3.11 19 6.1 AP
204HGS B EAV=651.87
204HG G 1704.3 1 3.42 14 (M1+E2)
204HGS G CC=0.0033 10$KC=0.0026 8$LC=0.00041 12$MC=9.E-5 3$NC+=0.00021 5
204HGS G NC=2.4E-5 7$OC=4.5E-6 13$PC=3.4E-7 11$IPC=0.00018 5
204HG cG E$From adopted gammas
204HG L 2264.36 18 (1,2,3)
204HG DL J$1984Cr01: state not assigned. Added by Schmorak based on re-placed
204HG2DL 1828 according to (n,n'g).
204HG B 2.03 16 6.2 AP
204HGS B EAV=600.46
204HG G 1827.80 18 2.23 14
204HG cG E$Placed by evaluator based on the 1827.4|g in (n,n'|g) (see adopted
204HG2cG gammas)
204HG DG E$From (N,N'G)
204HG L 2300.20 14(2+,3)
204HG DL J$1984Cr01: no Jpi assigned.
204HG B 2.0 4 6.1 AP
204HGS B EAV=585.62
204HG G 1172.0 1 1.8 4
204HG cG E$From adopted gammas
204HG G 1863.3 3 0.39 4
204HG cG E,RI$From adopted gammas
204HG L 2385.9 4 1+,2+
204HG DL J$1984Cr01: state not assigned. Added by Schmorak based on re-placed
204HG2DL 2386 according to (n,n'g).
204HG B 0.10 5 7.4 AP
204HGS B EAV=550.32
204HG G 2385.9 4 0.11 5
204HG DG %IG=0.10 5, using the calculated normalization.
204HG cG E$From adopted gammas
204HG DG E$from (N,N'G)
204HG L 2395.6 4 1,2,3
204HG DL J$1984Cr01: no Jpi assigned.
204HG B 2.9 5 5.9 AP
204HGS B EAV=546.34
204HG G 554.7 3 3.0 5
204HG G 1959.0 4 0.29 LE D
204HG L 2465.46 20 (2)+
204HG DL J$1984Cr01: state not assigned. Added by Schmorak based on re-placed
204HG2DL 2029 according to (n,n'g).
204HG B 0.35 6 6.7 AP
204HGS B EAV=517.77
204HG G 2028.9 2 0.38 6
204HG cG E$From adopted gammas.
204HG DG E$from (N,N'G)
204HG L 2726.6 3 (2+,3)
204HG DL J$1984Cr01: no Jpi assigned.
204HG B 0.61 19 6.2 AP
204HGS B EAV=412.77
204HG G 897.9 6 0.30 19
204HG G 1598.4 3 0.37 7
204HG L 2812.83 24 3-
204HG DL J$1984Cr01: no Jpi assigned.
204HG2DL Another level was assigned at 3669. Removed by Schmorak
204HG3DL upon re-placement of 1828 and 1680 gammas.
204HG B 0.66 7 6.0 AP
204HGS B EAV=378.84
204HG G 2376.26 24 0.72 7 [E1]
204HGS G CC=0.001321 19$KC=0.000448 7$LC=6.47E-5 9$MC=1.476E-5 21$NC+=0.000793 1
204HGS G NC=3.69E-6 6$OC=6.99E-7 10$PC=5.52E-8 8$IPC=0.000789 11
204HG DG $CC=0.001321 19$KC=0.000448 7$LC=6.47E-5 9$MC=1.476E-5 21
204HG2DG $NC+=0.000793 1
204HGSDG NC=3.69E-6 6$OC=6.99E-7 10$PC=5.52E-8 8$IPC=0.000789 11