ADOPTED LEVELS, GAMMAS for 76Ga
Authors: Balraj Singh, Jun Chen and Ameenah R. Farhan | Citation: Nucl. Data Sheets 194, 3 (2024) | Cutoff date: 8-Jan-2024
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=6916.3 keV 20 | S(n)= 5907.3 keV 21 | S(p)= 11026.7 keV 28 | Q(α)= -8938.6 keV 24 | ||
| Reference: 2021WA16 |
| References: | |||
| A | 76Zn β- decay (5.7 S) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | A | 2(-) | 30.5 s 4 % β- = 100 | |||||
| 172.29 3 | A | (1+,2+,3+) | 172.44 5 | 100 | (D) | 0.0 | 2(-) | |
| 199.50 3 | A | 1+ | 34 ns 8 | 199.2 5 | 100 | (E1) | 0.0 | 2(-) |
| 275.28 3 | A | 1+ | 75.9 5 102.88 5 275.34 5 | 100 16 5.3 6 20.0 12 | (M1) (E2) | 199.50 172.29 0.0 | 1+ (1+,2+,3+) 2(-) | |
| 281.57 3 | A | (0-:3+) | 82.1 3 109.23 8 281.56 5 | 90 8 15 3 100 8 | 199.50 172.29 0.0 | 1+ (1+,2+,3+) 2(-) | ||
| 369.81 6 | A | (0:3+) | 88.3 2 94.53 5 | 33 11 100 11 | 281.57 275.28 | (0-:3+) 1+ | ||
| 565.53 3 | A | 1+ | 290.23 8 365.98 5 393.20 5 565.52 5 | 12 2 100 4 16 3 21 3 | 275.28 199.50 172.29 0.0 | 1+ 1+ (1+,2+,3+) 2(-) | ||
| 680.83 3 | A | (0-:3+) | 405.5 1 481.42 5 508.8 2 680.70 4 | 10 3 40 4 100 20 20 3 | 275.28 199.50 172.29 0.0 | 1+ 1+ (1+,2+,3+) 2(-) | ||
| 781.55 5 | A | (0:3+) | 609.29 5 | 100 | 172.29 | (1+,2+,3+) | ||
| 1030.30 3 | A | 1+ | 748.72 5 755.03 2 830.7 5 857.98 5 1030.26 5 | 70 8 100 6 41 4 28 4 17 1 | 281.57 275.28 199.50 172.29 0.0 | (0-:3+) 1+ 1+ (1+,2+,3+) 2(-) | ||
| 1106.03 8 | A | (1) | 736.21 6 | 100 | 369.81 | (0:3+) | ||
| 1545.44 3 | A | 1+ | 763.9 1 864.59 5 979.85 5 1263.89 5 1345.94 5 1373.1 1 1545.48 5 | 2.2 11 22 3 21 3 89 11 100 11 3.9 11 54 3 | 781.55 680.83 565.53 281.57 199.50 172.29 0.0 | (0:3+) (0-:3+) 1+ (0-:3+) 1+ (1+,2+,3+) 2(-) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 1568.12 4 | A | 1+ | 786.5 1 1286.53 5 1368.59 4 1395.94 7 | 6 3 100 7 42 4 21 3 | 781.55 281.57 199.50 172.29 | (0:3+) (0-:3+) 1+ (1+,2+,3+) | ||
| 1621.22 8 | A | (1+) | 1251.40 5 | 100 | 369.81 | (0:3+) | ||
| 1750.14 3 | A | 1+ | 968.7 2 1069.22 5 1184.49 8 1468.53 5 1550.60 7 1578.00 5 1750.06 6 | 5.8 8 38 4 11 3 100 8 15 2 23 3 19 2 | 781.55 680.83 565.53 281.57 199.50 172.29 0.0 | (0:3+) (0-:3+) 1+ (0-:3+) 1+ (1+,2+,3+) 2(-) | ||
| 1810.50 6 | A | (1+) | 1610.99 5 | 100 | 199.50 | 1+ | ||
| 1825.99 7 | A | 1+ | 1456.16 4 | 100 | 369.81 | (0:3+) | ||
| 1896.05 6 | A | (1) | 1723.74 5 | 100 | 172.29 | (1+,2+,3+) | ||
| 1977.41 6 | A | (1+) | 1695.7 1 1702.12 9 1977.5 1 | 64 21 100 14 57 14 | 281.57 275.28 0.0 | (0-:3+) 1+ 2(-) | ||
| 2091.02 4 | A | 1+ | 1309.6 1 1410.2 1 1815.62 5 1918.9 1 2091.0 1 | 3.1 12 6.2 12 55 3 5.6 12 100 12 | 781.55 680.83 275.28 172.29 0.0 | (0:3+) (0-:3+) 1+ (1+,2+,3+) 2(-) | ||
| 2166.64 12 | A | (1+) | 1796.8 1 | 100 | 369.81 | (0:3+) | ||
| 2422.73 11 | A | 1+ | 2223.2 1 | 100 | 199.50 | 1+ | ||
| 2602.44 11 | A | 1+ | 2402.9 1 | 100 | 199.50 | 1+ | ||
E(level): From least-squares fit to Eγ data
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 172.29 | (1+,2+,3+) | 172.44 5 | (D) | 0.014 | α=0.014 2 | |
| 199.50 | 1+ | 34 ns 8 | 199.2 5 | (E1) | 0.00815 | B(E1)(W.u.)=1.40E-6 +43-27, α=0.00815 13 |
| 275.28 | 1+ | 75.9 5 | (M1) | 0.149 | α=0.149 | |
| 1+ | 102.88 5 | (E2) | 0.629 | α=0.629 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | 2(-) | 30.5 s 4 % β- = 100 | μ=-0.945 4 (2011Ma45,2019StZV), Q=+0.329 19 (2011Ma45,2021StZZ) Mean-square charge radius <r2>(71Ga,76Ga)=+0.276 5 64 (2012Pr11), first uncertainty is statistical, second is systematic. |
| 199.50 | 1+ | 34 ns 8 | Structure of this isomeric state is proposed by 2022Ch09 as a highly-mixed state of negative-parity proton configurations coupled to 1/2- neutron configurations. |
| 281.57 | (0-:3+) | Jπ(level): γ to/from 1+. log ft value (considered only approximate for this level) from 0+ suggests J=0,1. In some cases γ to 2(-) g.s. does not allow 0+. | |
| 369.81 | (0:3+) | Jπ(level): γ to/from 1+. log ft value (considered only approximate for this level) from 0+ suggests J=0,1. In some cases γ to 2(-) g.s. does not allow 0+. | |
| 680.83 | (0-:3+) | Jπ(level): γ to/from 1+. log ft value (considered only approximate for this level) from 0+ suggests J=0,1. In some cases γ to 2(-) g.s. does not allow 0+. | |
| 781.55 | (0:3+) | Jπ(level): γ to/from 1+. log ft value (considered only approximate for this level) from 0+ suggests J=0,1. In some cases γ to 2(-) g.s. does not allow 0+. |
| E(level) | E(gamma) | Comments |
| 172.29 | 172.44 | M(γ): From 1986Ek01 in 76Zn β- decay, probably deduced by the authors based on their measured ce data which however are not given in the paper |
| 199.50 | 199.2 | M(γ): From 1986Ek01 in 76Zn β- decay, probably deduced by the authors based on their measured ce data which however are not given in the paper |
| 275.28 | 75.9 | M(γ): From 1986Ek01 in 76Zn β- decay, probably deduced by the authors based on their measured ce data which however are not given in the paper | 102.88 | M(γ): From 1986Ek01 in 76Zn β- decay, probably deduced by the authors based on their measured ce data which however are not given in the paper |
| 680.83 | 680.70 | E(γ): somewhat poor fit in the level scheme, level-energy difference=680.82 |
| 1750.14 | 1578.00 | E(γ): somewhat poor fit in the level scheme, level-energy difference=1577.82 |
1961Ta08: production and identification of 76Ga in 76Ge(n,p) reaction using fast neutron beam from the University of Tokyo cyclotron facility. Measured Eβ, Eγ and half-life of the decay of 76Ga. Later studies of 76Ga decay: 1970OsZZ, 1971Ca39, 1974Gr29, 1981Ru07
2011Ma45: 76Ga produced by neutron induced fission of a thick uranium carbide target. Neutrons were produced by 1.4 GeV protons on tantalum. Ga isotopes were ionized using RILIS laser ion source. Laser spectroscopy was performed on the Ga isotopes at ISOLDE, CERN. The g.s. spins and moments were extracted from measured hyperfine spectra. Comparison with shell model calculations.
2012Pr11: measured optical spectra, hyperfine coefficients, isotope shifts, mean-square charge radii using collinear laser spectroscopy. RILIS source at ISOLDE, CERN facility
2016Do05: 76Ga activity produced in 9Be(76Ge32+,X), E=130 MeV/nucleon, and separated by A1900 fragment separator at NSCL-MSU. Secondary beam consisting of 73% 76Ga31+ and 27% 74Zn30+ was passed through the NSCL gas stopping station where primarily the 76Ga31+ beam was extracted and stopped in the gas cell. α scan of the activity as a function of mass of the extracted ions showed the molecular ion [76Ga(H2O)]+ as the main activity delivered to the counting station. The 76Ga ions with an energy of ≈40 keV and intensity of ≈500 particles/s were implanted into an aluminum target foil. Measured total absorption gamma-ray (TAS) spectrum using segmented NaI(Tl)(SuN) detector, and electrons from 76Ga β- decay by a silicon surface barrier detector located inside the bore hole of the SuN detector. Also detected were βγ-coincidences.
Mass measurement: 2007Gu09 (also 2005Gu36), 1981Al20
2020Ve08, 2012Sr01: thoeretical structure calculations
Theoretical calculations: five primary references for structure and four for decay characteristics retrieved from the NSR database (www.nndc.bnl.gov/nsr/) are listed in this dataset under ’document’ records.
Q-value: S(2n)=14390 4, S(2p)=24868 6 (2021Wa16)