55NI 55CU EC DECAY (55.9 MS) 2013TR09,2022TRZZ ENSDF 202204
55NI H TYP=FUL$AUT=Balraj Singh$CIT=ENSDF$CUT=30-Apr-2022$
55NI c 2013Tr09, 2022TrZZ: {+55}Cu produced in Be({+58}Ni{+28+},p2n),
55NI2c E({+58}Ni)=160 MeV/nucleon particle-transfer reaction, followed by
55NI3c separation using A1900 fragment separator and NSCL Radio Frequency
55NI4c Fragment separation at NSCL-MSU facility. Dominant fragments were
55NI5c {+54}Ni and {+55}Cu. The fragments were stopped in a planar Ge
55NI6c double-sided strip detectors (GeDSSD) surrounded by SeGA array of two
55NI7c rings of eight HPGe detectors each on either side. Measured E|g, I|g,
55NI8c (implants)|b correlated events, |b|g-coin, |g|g-coin, |b|g|g-coin,
55NI9c half-life of {+55}Cu g.s. decay. Deduced levels, J|p, IAS doublet, beta
55NIAc feedings, log {Ift} values, isospin mixing, split isobaric analog state
55NIBc (IAS) in {+55}Ni. Comparison with Shell model calculations using the
55NICc code COSMO with GXPF1A interaction in the full {Ifp} shell.
55NI c S(p)({+55}Ni)=4614.9 keV {I7} (2021Wa16), thus no delayed protons can
55NI2c be emitted from the IAS doublet identified at 4579+4599. 2013Tr09 state
55NI3c that no protons were detected indicating that delayed proton branch is
55NI4c small. Note that 2007Do17 reported a delayed proton branch of
55NI5c 15.0% {I43}, which may have belonged to another activity, as these
55NI6c authors obtained T{-1/2}=27 ms {I8}, in disagreement with 57 ms {I3}
55NI7c from 2013Tr09.
55NI cG E,RI$From 2022TrZZ. Uncertainties for intensities are statistical only
55NI cG RI(x)$Intensity split is based on |g|g-coin data as state by 2022TrZZ
55NI cL E$From least-squares fit to E|g data
55NI cL J$From Adopted Levels, essentially based on proposed assignments by
55NI2cL 2013Tr09 from shell-model calculations and comparison with level
55NI3cL structure in mirror nucleus {+55}Co. Evaluators place most assignments
55NI4cL in parentheses for which strong arguments are lacking. The log| {Ift}
55NI5cL values are not used here as there may be unbserved states above the
55NI6cL 5076 level since the Q(|e) value is 13.7 MeV
55CU P 0 (3/2-) 55.9 MS 18 1370E1 16
55CU cP J,T$From {+55}Cu Adopted Levels
55CU cP QP$From 2021Wa16
55NI N 1.0 1.0 1.0
55NI cN NR$Absolute |g-ray intensities (per 100 decays of {+55}Cu) are given
55NI2cN in 2022TrZZ, obtained from total number of |b-correlated implants and
55NI3cN the counts and efficiency of the |g-ray counts. With
55NI4cN S(p)({+55}Ni)=4614.9 keV {I7}, |b-delayed proton decay mode of {+55}Cu
55NI5cN is possible but no protons were detected by 2013Tr09. Note that
55NI6cN 2007Do17 reported a |b{++}-delayed proton branch of 15.0% {I43}, which
55NI7cN appears questionable as these authors obtained T{-1/2}=27 ms {I8} for
55NI8cN {+55}Cu decay in contrast to 57 ms {I3} by 2013Tr09 and 55.5 ms {I18}
55NI9cN by 2020Gi02
55NI L 0.0 7/2-
55NI cL $T{-z}=-1/2
55NI E 2.2 11 5.8 2 2.2 11 ?
55NIS E EAV=6107 80
55NI L 2085.4 4 3/2-
55NI E 6.6 9 0.0030 4 4.9 1 6.6 9
55NIS E EAV=5071 80$CK=0.000403 19$CL=4.35E-5 20$CM+=7.3E-6 4
55NI cE TI$7 {I2} in 2013Tr09
55NI G 2085.6 5 23.2 4
55NI L 2465.5 4 (3/2-)
55NI cL J$3/2- in 2013Tr09
55NI E 7.5 12 0.0038 6 4.8 1 7.5 12
55NIS E EAV=4882 80$CK=0.000449 22$CL=4.85E-5 24$CM+=8.2E-6 4
55NI cE TI$16 {I4} in 2013Tr09
55NI G 379.6 10 2.2 2
55NI G 2465.3 5 59.8 7
55NI L 2586.9 5 (5/2-)
55NI cL J$(3/2)- in 2013Tr09
55NI E 1.6 5 5.4 2 1.6 5
55NIS E EAV=4822 80
55NI cE TI$1.7 {I2} in 2013Tr09
55NI G 2586.9 5 5.5 4
55NI L 2802.0 4 (1/2-)
55NI cL J$(1/2)- in 2013Tr09
55NI E 4.5 7 0.0025 4 4.9 1 4.5 7
55NIS E EAV=4715 80$CK=0.000496 25$CL=5.4E-5 3$CM+=9.0E-6 5
55NI cE TI$4.6 {I5} in 2013Tr09
55NI G 336.7 5 7.7 3
55NI G 716.5 5 7.9 3 @
55NIF G FLAG=x
55NI cG $Total I|g=11.8 {I3}
55NI L 3182.7 4 (5/2-)
55NI cL J$(5/2)- in 2013Tr09
55NI E 0.9 LT 5.5 GT 0.9 LT ?
55NIS E EAV=4526 80
55NI cE TI$1.4 {I2} in 2013Tr09. Evaluators obtain 0.2 {I7}
55NI G 716.5 5 3.9 3 @
55NIF G FLAG=x
55NI G 3182.5 5 6.3 4
55NI L 3214.1 7 (1/2-)
55NI cL J$(1/2)- in 2013Tr09
55NI E 2.3 5 0.0015 3 5.1 1 2.3 5
55NIS E EAV=4511 80$CK=0.00056 3$CL=6.1E-5 4$CM+=1.03E-5 6
55NI cE TI$2.3 {I4} in 2013Tr09
55NI G 748.5 10 2.2 2
55NI G 1128.6 10 1.8 3 @
55NIF G FLAG=x
55NI cG $Total I|g=3.2 {I3}
55NI L 3593.7 6 (5/2-)
55NI cL J$(5/2)- in 2013Tr09
55NI E 0.5 5 5.7 5 0.5 5
55NIS E EAV=4323 80
55NI cE TI$1.3 {I2} in 2013Tr09
55NI G 1128.6 10 1.4 3 @
55NIF G FLAG=x
55NI G 3593.5 10 3.0 3
55NI L 3808.3 8 (1/2-,3/2-)
55NI cL J$(1/2,3/2)- in 2013Tr09
55NI E 0.6 LT 5.6 GT 0.6 LT ?
55NIS E EAV=4217 80
55NI cE TI$0.4 {I1} in 2013Tr09. Evaluators obtain 0.1 {I5}
55NI G 1342.6 10 2.5 2
55NI L 4026.8 6 (1/2-,3/2-)
55NI cL J$(1/2,3/2)- in 2013Tr09
55NI E 4.3 3 0.0036 3 4.67 5 4.3 3
55NIS E EAV=4108 80$CK=0.00073 5$CL=7.9E-5 5$CM+=1.34E-5 8
55NI cE TI$4.3 {I5} in 2013Tr09
55NI G 1561.3 5 4.3 3
55NI L 4579.4 5 (3/2-)
55NI cL J$3/2- in 2013Tr09
55NI cL E,J$proton-bound IAS of 3/2-. {+55}Cu g.s., and mirror state of
55NI2cL 4721, 3/2- state in {+55}Co
55NI E 18.8 7 0.0189 14 3.89 5 18.8 7
55NIS E EAV=3835 79$CK=0.00089 6$CL=9.6E-5 6$CM+=1.63E-5 10
55NI cE TI$19 {I4} in 2013Tr09
55NI G 771.0 10 2.0 2
55NI G 985.7 10 2.2 2
55NI G 1396.3 5 3.9 3
55NI G 1777.8 5 6.8 4
55NI G 1992.5 10 3.9 3
55NI L 4599.3 4 (3/2-)
55NI cL J$3/2- in 2013Tr09
55NI cL E,J$proton-bound IAS of 3/2-. {+55}Cu g.s., and mirror state of
55NI2cL 4748, 3/2- state in {+55}Co
55NI E 47.3 8 0.048 3 3.49 5 47.3 8
55NIS E EAV=3825 79$CK=0.00090 6$CL=9.7E-5 6$CM+=1.64E-5 10
55NI cE TI$48 {I8} in 2013Tr09
55NI G 1005.8 10 1.7 1
55NI G 1385.1 10 1.7 2
55NI G 1416.3 5 6.1 3
55NI G 1797.0 5 4.3 3
55NI G 2133.9 5 29.4 5
55NI G 2514.3 5 4.1 3
55NI L 5075.5 9
55NI E 4.0 8 0.0048 10 4.4 1 4.0 8
55NIS E EAV=3590 79$CK=0.00108 7$CL=0.000116 8$CM+=1.96E-5 13
55NI cE TI$4 {I1} in 2013Tr09
55NI G 1267 2 0.6 1 ?
55NI G 2610 1 3.1 3
55NI G 2990 2 0.9 2 ?