64NI 64CU EC DECAY (12.7006 H) 2012BE24,2012LU14,2010WA4621NDS 202112
64NI H TYP=FUL$AUT=Balraj Singh and Jun Chen$CIT=NDS 178, 41 (2021).$
64NI2 H CUT=12-Nov-2021$
64NI c 2012Be24: EURAMET 1085 measurements for spectroscopic properties of
64NI2c {+64}Cu decay made at five different laboratories: LNE-LNHB (France),
64NI3c PTB (Germany), CMI (Czech Republic), NPL (UK), and IFIN-HH (Romania).
64NI4c Results were evaluated for emission probabilities and half-life of
64NI5c {+64}Cu decay as follows: %|b{+-}=38.48 {I26}; %|b{++}=17.52 {I15};
64NI6c %|e(to {+64}Ni g.s.)=43.53 {I20}; I(|e)/[I(|b{++})+I(|b{+-})]=0.786
64NI7c {I10}; photon emission probability of 1345.7-keV |g ray=0.4748% {I34};
64NI8c and T{-1/2}=12.7004 h {I20}. See also DDEP evaluation 2011BeZW
64NI9c by M.M. Be and R.G. Helmer.
64NI c 2018Be13: measured absolute activity at NIST by 4|p|b|g live-timed
64NI2c anticoincidence method using liquid scintillator for |b and NaI(Tl)
64NI3c detector for |g activity. Comparison with standards from other
64NI4c laboratories, based on which authors concluded that improved data are
64NI5c needed for determination of consistent I(|b{++})/I(|b{+-}) branching
64NI6c ratios.
64NI c 2018Ya06: measured photon emission probability of 1345.7-keV |g ray at
64NI2c the IPEN metrology lab in Sao Paulo as 0.472% {I10} by 4|p|b|g-coin
64NI3c method using proportional counter for |b detection
64NI c 2017Pi09: measured photon emission probability of 1345.7-keV
64NI2c |g ray as 0.4721% {I26}, and half-life of {+64}Cu decay at NIST using
64NI3c four different methods for half-life.
64NI c 2012Am05: measured photon emission probability of 1345.7-keV |g ray,
64NI2c intensity of K|a- and K|b-x rays, and half-life of {+64}Cu decay
64NI3c at CEA, LIST, Saclay as a part of EURAMET 1085 project. Following
64NI4c values were determined: 0.472% {I12} for emission probability of
64NI5c 1345.7-keV |g, I(511 radiation)=35.1% {I3}, I(K|a x rays)=14.41% {I15},
64NI6c I(K|b x rays)=2.01% {I3}.
64NI c 2012Lu14: measurement of emission probabilities of 1345.7-keV |g ray
64NI2c and 511-keV radiation, together with half-life of {+64}Cu decay at
64NI3c IFIN-HH, Bucharest as part of EURAMET project 1085. Values
64NI4c obtained were: 0.481% {I17} for photon emission probability of
64NI5c 1345.7-keV |g ray, 35.3% {I12} for 511-keV radiation, and
64NI6c T{-1/2}=12.696 h {I12}.
64NI c 2010Wa46: measurement of emission probabilities of 1345.7-keV |g ray
64NI2c and 511-keV radiation, together with half-life of {+64}Cu decay at
64NI3c PTB, Germany as part of EURAMET project 1085. Values
64NI4c obtained were: 0.474% {I5} for photon emission probability of
64NI5c 1345.7-keV |g ray, 35.12% {I22} for 511-keV radiation, and
64NI6c T{-1/2}=12.704 h {I5}.
64NI c 2011InZZ: measured KLL-Auger spectrum
64NI c 2008Fa12: measured temperature dependence of half-life
64NI c 2007Qa02: measurement of emission probabilities of 1345.7-keV |g ray,
64NI2c I(|b{+-}), I(|b{++}), and I(|e) at Julich, Germany. Values obtained
64NI3c were: 0.54% {I3} for photon emission probability of 1345.7-keV |g ray,
64NI4c 38.4% {I12} for I(|b{+-}), 17.8% {I4} for I(|b{++}), 43.8% {I14} for
64NI5c I(|e).
64NI c 2006Fe11: measured near-zero-energy electron yields
64NI2c as a function of source thickness.
64NI c 1986Ka03, 1983Ch47: Measured |b{++}, |b{+-}, |g, 4|p|b|g, T{-1/2}
64NI c 2002We02: measured %|b{+-} from analysis of {+64}Zn and {+64}Ni atoms
64NI c 2005QaZY: positron branching measured, but no results available
64NI c T{-1/2}({+64}Cu decay): see {+64}Cu Adopted Levels, Gammas dataset
64NI2c for detailed comments about half-life measurements
64NI c |b{+-}: 1984Co12+1983Sc31 (search for massive neutrinos),
64NI2c 1959Sc27, 1959Sc71, 1949Bo16, 1949Ow06, 1949La24, 1948Co02, 1946Br03,
64NI3c 1941To01, 1939Ty01. Theory: 1972Ma72
64NI c |b longitudinal polarization: 1957Vi21, 1957Ha17
64NI c K-shell ionization (calculation): 1988Ba78
64NI c |g: 1984Ke14, 1982RuZV, 1974HeYW, 1974Ar22, 1972Cr02,
64NI2c 1970Di01, 1969GuZV, 1968Ke12, 1959Sc71, 1953Dz30, 1952Vl03, 1952Br31,
64NI3c 1951Me58, 1950Ku51, 1950Bo34, 1949Hu21, 1948Ku10, 1948Me26, 1948Co14,
64NIxc 1947De07
64NI c |b{+-}, |b{++}: 1984Co12+1983Sc31 (search for massive neutrinos),
64NI2c 1959Sc27, 1951Pl17, 1949Bo16, 1949Ow06, 1949La24, 1948Co02, 1947Pe10,
64NI3c 1946Br03, 1941To01, 1939Ty01. Theory: 1972Ma72
64NI c Fluorescence yields (K-shell vacancies etc.) (using
64NI2c |g{+|+} K| x ray coin and |g{+|+} |b K| x ray coin techniques):
64NIxc 1980Sc20, 1980Sc03, 1979Do10.
64NI d Theory: 1992Ba66, 1988Ba78, 1983In03, 1981Mu14, 1981Ba61
64NI c Polarization of positrons through |g{+|+} (|q): 1966Fu16, 1957Ha17
64NI c Others: 1960La13, 1957Ku57, 1956Dz26, 1951Hi88, 1950Re51
64NI cG $%I(K|a X ray)=14.41 {I15}, %I(K|b X ray)=2.01 {I3} (2012Am05,2012Be24)
64NI cL J,T$From the Adopted Levels
64CU P 0.0 1+ 12.7006 H 20 1674.62 21
64CU cP J,T$From {+64}Cu Adopted Levels
64CU cP QP$From 2021Wa16
64NI N 1.6255 0.6152 30 1.6255
64NI cN BR$%|e+%|b{++}=61.52 {I30} from 100-%|b{+-} with %|b{+-}=38.48 {I30}
64NI2cN from weighted average of 38.4 {I12} (2007Qa02), 38.06 {I30} (2002We02),
64NI3cN 38.34 {I56} (1986Ka03) and 39.04 {I33} (1983Ch47). Measured
64NI4cN %|b{++}=17.68 {I11}, weighted average of 17.69 {I19}, 17.55 {I15} and
64NI5cN 17.65 {I60} in 2012Be24, 17.56 {I11} (2010Wa46), 17.8 {I4} (2007Qa02),
64NI6cN 17.93 {I20} (1986Ka03), and 17.86 {I14} (1983Ch47). Measured %|e=43.40
64NI7cN {I56}, weighted average of 43.8 {I14} (2007Qa02), 43.73 {I52}
64NI8cN (1986Ka03) and 43.10 {I46} (1983Ch47)
64NI PN 1.0 1.0 3
64NI L 0.0 0+
64NI E 17.49 15 43.56 25 4.969 2 61.05 30
64NIS E EAV=278.008 90$CK=0.6330 2$CL=0.06883 3$CM+=0.011629 4
64NI cE E$1673.4 {I10} from measured E(|b{++})=651.4 {I10} (1983Ch47). Others:
64NI2cE 1959Sc71, 1951Hi88, 1949Ow06, 1948Co02, 1947Pe10, 1946Br03, 1941To01,
64NI3cE 1939Ty01
64NI cE TI$from adopted %|e+%|b{++}(g.s.+1346)=61.52 {I30} and
64NI2cE %|e+%|b{++}(1346 level)=0.472 {I4}.
64NI L 1345.79 6 2+ 1.086 PS 35
64NI E 0.472 4 5.504 4 0.472 4
64NIS E CK=0.8835$CL=0.09963$CM+=0.01691
64NI cE TI$from %I(1345.8|g)
64NI G 1345.77 6 0.472 4 E2 1.63E-4
64NIS G KC=0.0001113 16$LC=1.085E-5 16$MC=1.528E-6 22
64NIS G NC=6.59E-8 10$IPC=3.94E-5 6
64NI cG E$from 1974HeYW; |D(E|g)=0.16 keV quoted in 2004BeZR (see evaluation
64NI2cG of {+64}Cu decay) seems a misprint.
64NI cG RI$weighted average of 0.472 {I10} (2018Ya06), 0.469 {I4} (2017Pi09),
64NI2cG 0.476 {I6}, 0.472 {I12} and 0.481 {I17} in 2012Be24, 0.474 {I5}
64NI3cG (2010Wa46), 0.471 {I11} (1983Ch47), and 0.487 {I20} (1986Ka03). Other:
64NI4cG 0.54 {I3} from 2007Qa02 is discrepant
64NI cG M$from the Adopted dataset