ADOPTED LEVELS, GAMMAS for 77Zn
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 30-SEP-2020
Authors: Balraj Singh, Ninel Nica | Citation: Nucl. Data Sheets 113, 1115 (2012) | Cutoff date: 30-Mar-2012
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=7203 keV 3 | S(n)= 4557.5 keV 25 | S(p)= 15102 keV 7 | Q(α)= -11106 keV 3 | ||
Reference: 2017WA10 |
References: | |||
A | 77Cu β- decay (469.8 MS) | B | 77Zn IT decay (1.05 S) |
C | 78Cu β-n decay (331.7 MS) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | ABC | 7/2+ | 2.08 s 5 % β- = 100 | |||||
114.721 10 | A C | (9/2+) | 114.72 1 | 100 | [M1+E2] | 0.0 | 7/2+ | |
772.440 15 | AB | 1/2- | 1.05 s 10 % IT = 34 7 % β- = 66 7 | 772.43 2 | 100 | [E3] | 0.0 | 7/2+ |
801.89 11 | A C | (11/2+) | 687.17 11 | 100 | 114.721 | (9/2+) | ||
1130.5 3 | A | 1015.8 3 | 100 | 114.721 | (9/2+) | |||
1235.1 5 | A | 1120.4 5 | 100 | 114.721 | (9/2+) | |||
1277.690 15 | A | (5/2-,3/2+) | 505.25 1 1277.68 2 | 100.0 7 37.3 8 | 772.440 0.0 | 1/2- 7/2+ | ||
1284.62 15 | A | 1169.81 16 1284.8 5 | 32 4 100 6 | 114.721 0.0 | (9/2+) 7/2+ | |||
1363.786 25 | A | (1/2+,3/2-) | 591.33 2 | 100 | 772.440 | 1/2- | ||
1409.078 20 | A | 131.35 22 1409.07 2 | 4.0 7 100 3 | 1277.690 0.0 | (5/2-,3/2+) 7/2+ | |||
1427.3 3 | A | 1427.7 6 | 100 | 0.0 | 7/2+ | |||
1637.48 21 | A | 352.86 15 | 100 | 1284.62 | ||||
1875.66 11 | A | 466.88 25 1875.86 17 | 55 15 100 13 | 1409.078 0.0 | 7/2+ | |||
2082.81 4 | A | 805.11 3 | 100 | 1277.690 | (5/2-,3/2+) | |||
2152.6 23 | A | 2037.9 23 | 100 | 114.721 | (9/2+) | |||
2235.378 24 | A | (5/2+) | 826.33 18 871.45 9 957.69 2 2118.8 4 2234.3 4 | 4.7 8 17.4 17 100.0 22 5.5 14 3.6 11 | 1409.078 1363.786 1277.690 114.721 0.0 | (1/2+,3/2-) (5/2-,3/2+) (9/2+) 7/2+ | ||
2380.4 3 | A | 2265.6 3 | 100 | 114.721 | (9/2+) | |||
2527.2 5 ? | A | 2527.2 5 | 100 | 0.0 | 7/2+ | |||
2545.84 12 | A | 1268.14 12 | 100 | 1277.690 | (5/2-,3/2+) | |||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
2574.2 4 ? | A | 2459.4 4 ? | | 114.721 | (9/2+) | |||
2654.14 9 | A | 1290.34 8 | 100 | 1363.786 | (1/2+,3/2-) | |||
2872.67 5 | A | 637.29 5 997.29 15 1463.69 14 1594.8 1 2757.9 5 | 100 8 41 6 53 7 97 10 18 6 | 2235.378 1875.66 1409.078 1277.690 114.721 | (5/2+) (5/2-,3/2+) (9/2+) | |||
2891.8 3 ? | A | 1528.0 3 ? | | 1363.786 | (1/2+,3/2-) | |||
3001.12 10 | A | 1723.41 9 | 100 | 1277.690 | (5/2-,3/2+) | |||
3083.18 9 | A | 1000.33 14 1805.5 1 2967.6 7 | 47 7 100 8 14 6 | 2082.81 1277.690 114.721 | (5/2-,3/2+) (9/2+) | |||
3095.1 5 ? | A | 1817.4 5 ? | | 1277.690 | (5/2-,3/2+) | |||
3139.30 15 | A | 903.8 14 1056.6 3 1730.18 18 3139.1 6 | 89 16 54 11 100 16 59 16 | 2235.378 2082.81 1409.078 0.0 | (5/2+) 7/2+ | |||
3204.56 5 | A | 1840.15 21 1926.87 4 | 21 3 100 3 | 1363.786 1277.690 | (1/2+,3/2-) (5/2-,3/2+) | |||
3386.92 13 | A | 2023.04 14 2109.4 3 3387.2 6 | 100 10 65 10 25 6 | 1363.786 1277.690 0.0 | (1/2+,3/2-) (5/2-,3/2+) 7/2+ | |||
3426.98 13 | A | 2017.8 4 2141.7 5 2149.32 14 | 28 8 23 8 100 11 | 1409.078 1284.62 1277.690 | (5/2-,3/2+) | |||
3709.9 15 | A | 2432.2 15 | 100 | 1277.690 | (5/2-,3/2+) | |||
3744.00 9 | A | 1661.16 9 2335.1 3 2466.6 7 3743.6 4 | 100 14 18 6 12 4 21 5 | 2082.81 1409.078 1277.690 0.0 | (5/2-,3/2+) 7/2+ | |||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
3823.88 16 | A | 2396.6 3 2546.12 16 3826.7 10 ? | 47 7 100 8 39 13 | 1427.3 1277.690 0.0 | (5/2-,3/2+) 7/2+ | |||
4334.35 20 | A | 4220.5 16 4334.2 2 | 9 5 100 11 | 114.721 0.0 | (9/2+) 7/2+ | |||
4531.9 4 | A | 4417.0 4 | 100 | 114.721 | (9/2+) | |||
4605.27 21 | A | 3178.0 6 4490.37 23 4605.3 6 | 41 9 100 13 30 7 | 1427.3 114.721 0.0 | (9/2+) 7/2+ |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Conversion Coefficient | Additional Data |
114.721 | (9/2+) | 114.72 1 | [M1+E2] | 0.10 3 | 0.046 | α=0.046 2 | |
772.440 | 1/2- | 1.05 s 10 % IT = 34 7 % β- = 66 7 | 772.43 2 | [E3] | 0.00133 | B(E3)(W.u.)=6.8E-6 16, α=0.00133 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 7/2+ | 2.08 s 5 % β- = 100 | μ=-0.9067 1 (2017Wr01,2019StZV), Q=+0.48 4 (2017Wr01) Measured isotope shift δν(68Zn,77Zn)=236.0 MHz 16(stat) 120(syst) (2019Xi07, laser spectroscopy at ISOLDE-CERN). |
114.721 | (9/2+) | XREF: C(?). | |
772.440 | 1/2- | 1.05 s 10 % IT = 34 7 % β- = 66 7 | μ=+0.562 2 (2017Wr01,2019StZV) Measured isotope shift δν(68Zn,77Zn)=241.2 MHz 38(stat) 120(syst) (2019Xi07, laser spectroscopy at ISOLDE-CERN). |
801.89 | (11/2+) | XREF: C(?). |
E(level) | E(gamma) | Comments |
772.440 | 772.43 | M(γ): the multipolarity may be E3, as suggested by the assigned Jπ values. Deduced B(E3)(W.u.) is smaller than any other value for A<90 (1979En04). In the α=80 region, B(E3)(W.u.) for 7/2+ to 1/2- range from 0.0362 6 for 77Se to 0.00071 4 for 81Se |
801.89 | 687.17 | E(γ): it is assumed that 685.5γ in 2009Pa35 is the same as 688.7γ in 78Cu β-n decay data of 2005Va19 and 687.17 in 77Cu β- of 2009Il01 |
2235.378 | 2118.8 | E(γ): poor fit, not included in the least-squares fitting procedure. Level-energy difference=2120.6 |
1970OsZZ, 1977Al17: 77Zn isotope identified and produced in 235U(n,F) at OSIRIS facility, and subsequent counting of β and γ spectra.
2017Wr01: E(p)=1.4 GeV incident on UCx target at ISOLDE-CERN facility. The 77Zn nuclei were resonantly ionized using a resonant laser-ion source, accelerated to 30 keV, and separated by high-resolution separator. The ions were cooled using a gas-filled radio-frequency quadrupole (RFQ-ISCOOL). Measured hyperfine spectra using collinear laser spectroscopy using COLLAPS setup at ISOLDE-CERN. Deduced spins, μ, Q, isomer. Comparison with large-scale shell model calculations. For the calibration of nuclear moments, μ=+0.875479 9 from literature and Q=+0.122 10 (2017Wr01) for the stable 67Zn nuclide were used as references. See also 2017Ne04 review article.
2019Xi07: measured isotope shifts and charge radii using laser spectroscopy at ISOLDE-CERN
Mass measurement: 2008Ba54: Penning trap mass spectrometer ISOLTRAP
Additional neutron-decaying levels above S(n) are expected to be populated with allowed β transitions from 77Cu decay (2009Pa35)
Theoretical calculations: consult the NSR database at www.nndc.bnl.gov for 10 primary theory references dealing with nuclear structure calculations, and radioactive decays.
Q-value: S(2n)=12372.9 28, S(2p)=29340 300 (syst) (2017Wa10)
Q-value: Measured mass excess for 77Ga=-65995.0 keV 42 (2019Hu15), as compared to -65992.3 keV 24 in 2017Wa10 leads to Q(β-)=7205.8 keV 47