164GD 164GD IT DECAY (0.580 US) 2017YO01,2017PA25 18NDS 201712
164GD H TYP=FUL$AUT=BALRAJ SINGH AND JUN CHEN{+#}$CIT=NDS 147, 1 (2018)$
164GD2 H CUT=30-Nov-2017$
164GD c Reaction: {+9}Be({+238}U,F),E=345 MeV/nucleon
164GD c 2017Yo01: {+164}Gd formed by in-flight fission of 345 MeV/nucleon
164GD2c {+238}U beam with a 3.96 to 4.93 mm thick {+9}Be target at RIBF-RIKEN
164GD3c facility. Fission fragments were separated and identified in the
164GD4c BigRIPS spectrometer by the measurement of energy loss |DE,
164GD5c time-of-flight and magnetic rigidity. Two parallel-plate avalanche
164GD6c counters (PPACs) were used to track the position of implanted ions.
164GD7c The |g rays were detected by four Clover HPGe detectors. Measured
164GD8c E|g, I|g, ({+164}Gd ions)|g-coin, delayed |g-radiation, and half-life
164GD9c of an isomer, within a time window of |?100 ns to 30 |ms.
164GDAc Comparison with theoretical calculations using deformed Hartree-Fock
164GDBc with angular momentum projection model, and projection shell model.
164GD c 2017Pa25: {+164}Gd isomer populated in
164GD2c {+9}Be({+238}U,F),E=345 MeV/nucleon reaction at RIBF, RIKEN facility
164GD3c using the BigRIPS and ZeroDegree spectrometers for separation
164GD4c and identification of in-flight fission fragments. Delayed
164GD5c gamma rays were detected using EURICA (Euroball-RIKEN Cluster) array,
164GD6c consisting of 84 HPGe crystals. Measured half-life of the 1096, (4-)
164GD7c isomer by |g(t) method.
164GD cG E$From 2017Pa25, unless otherwise stated. Values from 2017Yo01 are
164GD2cG given under comments
164GD cG RI$From 2017Yo01. Values from 2017Pa25 are given under comments
164GD cG M$As assigned by 2017Yo01 from transition intensity balances for the
164GD2cG lowest energy transitions, also guided by |DJ|p
164GD dG CC$Theoretical values from BrIcc code with Frozen orbital approximation
164GD cL E$Deduced by evaluators from E|g values.
164GD cL J$As assigned by 2017Yo01 and 2017Pa25, based on systematic trend of
164GD2cL even-even nuclei for the 2+ and 4+ states, and Hartree-Fock
164GD3cL calculations for the 3+ and 4- states
164GD P 1095.5 11 (4-) 0.580 US 23
164GD N 0.73 7 1
164GD cN NR$Deduced by evaluators from I|g+ce(854.1|g+961.9|g)=100.
164GD2cN Using intensity data for 854.1 and 961.9 gamma rays from 2017Pa25,
164GD3cN |g-normalization factor=0.57 {I13}
164GD CN BR$%IT=100 is assumed
164GD PN 3
164GD L 0.0 0+
164GD L 73 1 2+
164GD G 73 1 19 4 (E2) 8.71 19
164GD cG $E|g=72.0 (2017Yo01). I|g=27 {I14} (2017Pa25)
164GD L 241.2 11 4+
164GD G 168.4 4 71 5 (E2) 0.400 7
164GD cG $E|g=168.0 (2017Yo01). I|g=100 {I28} (2017Pa25)
164GD L 1035.1 11 (3+)
164GD cL J$theoretical calculations predict configuration=|nf{-5/2}~#|n1/2[521]
164GD2cL (2017Yo01)
164GD G 794 ?
164GD cG E$tentative |g from 2017Pa25 only, very weak line as shown in authors'
164GD2cG spectral Fig. 6.
164GD G 961.9 4 37 7 [M1] 0.0050
164GD cG $E|g=961.9 (2017Yo01). I|g=79 {I17} (2017Pa25)
164GD L 1095.5 11 (4-) 0.580 US 23 M
164GD cL $Proposed configuration=|n7/2[633]~#|n1/2[521],K|p=4- from comparison
164GD2cL with deformed Hartree-Fock with angular momentum projection model,
164GD3cL and projection shell model. Theoretical calculations for this level
164GD4cL reported by 2017Yo01 and 2017Pa25
164GD cL T$from 2017Yo01, based on likelihood fitting of time spectrum between
164GD2cL the {+164}Gd beam implantation and subsequent summed |g-ray spectrum.
164GD3cL Other: 0.530 |ms {I100} (2017Pa25). Weighted average of the two values
164GD4cL is 0.577 |ms {I23}, very close to that in 2017Yo01.
164GD G 60.2 14 3 [E1] 1.124 22
164GD cG E$from 2017Yo01, 0.3 keV uncertainty assumed by evaluators for
164GD2cG least-squares fit. This |g was not seen by 2017Pa25, but included in
164GD2cG the decay scheme with E|g=61 {I1}.
164GD cG $I|g=16 {I6}, from intensity balance (2017Pa25)
164GD cG $Reduced E1 hindrance factor f{-|n}=2.37|*10{+6} {I10} (2017Yo01),
164GD2cG where |n=|DK-|l
164GD G 854.7 5 100 11 [E1] 0.00154
164GD cG $E|g=854.1 (2017Yo01). I|g=97 {I34} (2017Pa25)
164GD cG $Reduced E1 hindrance factor f{-|n}=1.28|*10{+3} {I3} (2017Yo01),
164GD2cG where |n=|DK-|l. Other f{-|n}=65 (2017Pa25)