64ZN 64CU B- DECAY (12.7006 H) 2012BE24,1983CH47,2002WE0221NDS 202112 64ZN H TYP=FUL$AUT=Balraj Singh and Jun Chen$CIT=NDS 178, 41 (2021).$ 64ZN2 H CUT=12-Nov-2021$ 64ZN c 2012Be24: EURAMET 1085 measurements for spectroscopic properties of 64ZN2c {+64}Cu decay made at five different laboratories: LNE-LNHB (France), 64ZN3c PTB (Germany), CMI (Czech Republic), NPL (UK), and IFIN-HH (Romania). 64ZN4c Results were evaluated for emission probabilities and half-life of 64ZN5c {+64}Cu decay as follows: %|b{+-}=38.48 {I26}; %|b{++}=17.52 {I15}; 64ZN6c %|e(to {+64}Ni g.s.)=43.53 {I20}; I(|e)/[I(|b{++})+I(|b{+-})]=0.786 64ZN7c {I10}; photon emission probability of 1345.7-keV |g ray=0.4748% {I34}; 64ZN8c and T{-1/2}=12.7004 h {I20}. See also DDEP evaluation 2011BeZW 64ZN9c by M.M. Be and R.G. Helmer. 64ZN c 2018Be13: measured absolute activity at NIST by 4|p|b|g live-timed 64ZN2c anticoincidence method using liquid scintillator for |b and NaI(Tl) 64ZN3c detector for |g activity. Comparison with standards from other 64ZN4c laboratories, based on which authors concluded that improved data are 64ZN5c needed for determination of consistent I(|b{++})/I(|b{+-}) branching 64ZN6c ratios. 64ZN c 2018Ya06: measured photon emission probability of 1345.7-keV |g ray at 64ZN2c the IPEN metrology lab in Sao Paulo as 0.472% {I10} by 4|p|b|g-coin 64ZN3c method using proportional counter for |b detection 64ZN c 2017Pi09: measured photon emission probability of 1345.7-keV 64ZN2c |g ray as 0.4721% {I26}, and half-life of {+64}Cu decay at NIST using 64ZN3c four different methods for half-life. 64ZN c 2012Am05: measured photon emission probability of 1345.7-keV |g ray, 64ZN2c intensity of K|a- and K|b-x rays, and half-life of {+64}Cu decay 64ZN3c at CEA, LISt, Saclay as a part of EURAMET 1085 project. Following 64ZN4c values were determined: 0.472% {I12} for emission probability of 64ZN5c 1345.7-keV |g, I(511 radiation)=35.1% {I3}, I(K|a x rays)=14.41% {I15}, 64ZN6c I(K|b x rays)=2.01% {I3}. 64ZN c 2012Lu14: measurement of emission probabilities of 1345.7-keV |g ray 64ZN2c and 511-keV radiation, together with half-life of {+64}Cu decay at 64ZN3c IFIN-HH, Bucharest as part of EURAMET project 1085. Values 64ZN4c obtained were: 0.481% {I17} for photon emission probability of 64ZN5c 1345.7-keV |g ray, 35.3% {I12} for 511-keV radiation, and 64ZN6c T{-1/2}=12.696 h {I12}. 64ZN c 2010Wa46: measurement of emission probabilities of 1345.7-keV |g ray 64ZN2c and 511-keV radiation, together with half-life of {+64}Cu decay at 64ZN3c PTB, Germany as part of EURAMET project 1085. Values 64ZN4c obtained were: 0.474% {I5} for photon emission probability of 64ZN5c 1345.7-keV |g ray, 35.12% {I22} for 511-keV radiation, and 64ZN6c T{-1/2}=12.704 h {I5}. 64ZN c 2011InZZ: measured KLL-Auger spectrum 64ZN c 2008Fa12: measured temperature dependence of half-life 64ZN c 2007Qa02: measurement of emission probabilities of 1345.7-keV |g ray, 64ZN2c I(|b{+-}), I(|b{++}), and I(|e) at Julich, Germany. Values obtained 64ZN3c were: 0.54% {I3} for photon emission probability of 1345.7-keV |g ray, 64ZN4c 38.4% {I12} for I(|b{+-}), 17.8% {I4} for I(|b{++}), 43.8% {I14} for 64ZN5c I(|e). 64ZN c 2006Fe11: measured near-zero-energy electron yields 64ZN2c as a function of source thickness. 64ZN c 1986Ka03, 1983Ch47: Measured |b{++}, |b{+-}, |g, 4|p|b|g, T{-1/2} 64ZN c 2002We02: measured %|b{+-} from analysis of {+64}Zn and {+64}Ni atoms 64ZN c 2005QaZY: positron branching measured, but no results available 64ZN c Others: 64ZN c T{-1/2}({+64}Cu decay): see {+64}Cu Adopted Levels, Gammas dataset 64ZN2c for detailed comments about half-life measurements 64ZN c |b{+-}: 1984Co12, 1983Sc31 (search for massive neutrinos), 64ZN2c 1959Sc27, 1959Sc71, 1949Bo16, 1949Ow06, 1949La24, 1948Co02, 1946Br03, 64ZN3c 1941To01, 1939Ty01. Theory: 1972Ma72 64ZN c |b longitudinal polarization: 1957Vi21, 1957Ha17 64ZN c K-shell ionization (calculation): 1988Ba78 64CU P 0.0 1+ 12.7006 H 20 579.6 6 64CU cP J,T$From {+64}Cu Adopted Levels 64CU cP QP$From 2021Wa16 64ZN N 0.3848 26 2.5988 64ZN cN BR$From 2012Be24 measurement and evaluation. Others: 64ZN2cN 1983Ch47 give %|e=43.1 {I5}, %|b{++}=17.86 {I14}, %|b{+-}=39.0 {I3}, 64ZN3cN %(1346|g)=0.471 {I11}, I|b{+-}/I|b{++}=2.187 {I7}. Corresponding 64ZN4cN values from 1986Ka03 are: %|e=43.7 {I5}, %|b{++}=17.93 {I20}, 64ZN5cN %|b{+-}=38.3 {I6}, %(1346|g)=0.487 {I20}. 2002We02 determine 64ZN6cN %|b{+-}=38.06 {I30} by analyzing {+64}Zn and {+64}Ni atoms using 64ZN7cN isotope dilution method combined with thermal ionization mass 64ZN8cN spectrometry. In 2007Si04 evaluation, %|b{+-}=38.5 {I3} was adopted 64ZN9cN as weighted average of %|b{+-}=38.06 {I30} (2002We02), 38.3 {I6} 64ZNAcN (1986Ka03) and 39.0 {I3} (1983Ch47), which agrees with the newly 64ZNBcN evaluated value of 38.48% {I26} (2012Be24). Others: 1959Sc27, 1952Vl03, 64ZNCcN 1951Hi88, 1950Ku51, 1947Pe10, 1947De07 64ZN L 0.0 0+ 64ZN B 38.48 26 5.302 5 64ZNS B EAV=190.74 24 64ZN cB E$measured end-point energy=577.8 {I10} (1983Ch47). Others: 1959Sc71, 64ZN2cB 1951Hi88, 1949Ow06, 1948Co02, 1947Pe10, 1946Br03, 1941To01, 1939Ty01 64ZN cB IB$from 2012Be24 evaluation. Others: 64ZN2cB 1983Ch47 give %|e=43.1 {I5}, %|b{++}=17.86 {I14}, %|b{+-}=39.0 {I3}, 64ZN3cB %(1346|g)=0.471 {I11}, I|b{+-}/I|b{++}=2.187 {I7}. Corresponding 64ZN4cB values from 1986Ka03 are: %|e=43.7 {I5}, %|b{++}=17.93 {I20}, 64ZN5cB %|b{+-}=38.3 {I6}, %(1346|g)=0.487 {I20}. 2002We02 determine 64ZN6cB %|b{+-}=38.06 {I30} by analyzing {+64}Zn and {+64}Ni atoms using 64ZN7cB isotope dilution method combined with thermal ionization mass 64ZN8cB spectrometry. In 2007Si04 evaluation, %|b{+-}=38.5 {I3} was adopted 64ZN9cB as weighted average of %|b{+-}=38.06 {I30} (2002We02), 38.3 {I6} 64ZNAcB (1986Ka03) and 39.0 {I3} (1983Ch47), which agrees with the newly 64ZNBcB evaluated value of 38.48% {I26} (2012Be24). Others: 1959Sc27, 1952Vl03, 64ZNCcB 1951Hi88, 1950Ku51, 1947Pe10, 1947De07