ADOPTED LEVELS, GAMMAS for 73Zn
Authors: Balraj Singh and Jun Chen | Citation: Nucl. Data Sheets 158, 1 (2019) | Cutoff date: 16-May-2019
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=4105.9 keV 25 | S(n)= 5519.2 keV 28 | S(p)= 13099.4 keV 23 | Q(α)= -8040 keV 4 | ||
Reference: 2017WA10 |
References: | |||
A | 73Cu β- decay (4.2 S) | B | 74Cu β-n decay (1.63 S):? |
C | 76Ge(14C,17O) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | A C | 1/2- | 24.5 s 2 % β- = 100 | |||||
195.5 2 | A | 5/2+ | 13.0 ms 2 % IT = 100 | 195.5 2 | 100 | [M2] | 0.0 | 1/2- |
307.2 2 | A C | (1/2,3/2,5/2-) | 307.2 2 | 100 | 0.0 | 1/2- | ||
449.6 2 | A | (3/2-) | 449.6 2 | 100 | 0.0 | 1/2- | ||
502.2 2 | A C | (1/2,3/2,5/2-) | 502.2 2 | 100 | 0.0 | 1/2- | ||
1124.0 3 | A C | (1/2,3/2,5/2) | 674.4 2 | 100 | 449.6 | (3/2-) | ||
2008.9 3 | A | (1/2,3/2,5/2) | 1559.3 2 | 100 | 449.6 | (3/2-) |
E(γ): From 73Cu β- decay
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
195.5 | 5/2+ | 13.0 ms 2 % IT = 100 | 195.5 2 | [M2] | 0.065 | B(M2)(W.u.)=0.000449 7, α=0.065 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
307.2 | (1/2,3/2,5/2-) | XREF: C(280). | |
1124.0 | (1/2,3/2,5/2) | Jπ(level): Possible β- feeding from 3/2-. | |
2008.9 | (1/2,3/2,5/2) | Jπ(level): Possible β- feeding from 3/2-. |
73Zn produced and identified by 1972Er05, measured half-life.
2018Ya11: E=1.4 GeV proton beam from ISOLDE-CERN facility. Measured and analyzed hyperfine spectra of 73Zn isotopes. Deduced T1/2 and further support for spin assignment for the isomer. Comparison with large-scale shell-model calculations. Systematics of neighboring nuclei.
2008Ba54: measured mass using the ISOLTRAP mass spectrometer.
2017Wr01: measured hyperfine structure, spin, μ, Q of the ground state and isomer using collinear laser spectroscopy using COLLAPS setup at ISOLDE-CERN
Levels: 2018Ya11 have observed no evidence of the existence of a 5.8-s isomer proposed from a β-decay study by 1985Ru05
Levels: α 5.8 s 8 activity was reported by 1985Ru05 in the bombardment of natural tungsten target by 82Se beam at 11.5 MeV/nucleon. In Eγ and βγ coin measurements, 1985Ru05 reported two γ rays at 195.5 and 42.1. The 195.5γ was proposed as an isomeric transition (E3 multipolarity suggested from α(K)exp=0.24 6, deduced from I(K-x ray)/Iγ ratio) from a 195.5 level of 5.8 s half-life. Based on arguments of K-x ray intensity and its observation in γβ coin data, 42.1γ was suggested as a transition in 73Ga from β- decay of the 5.8-s isomer of 73Zn. 1998Hu20 did see a 195.5γ from β- decay of 73Cu and assigned this γ from a level of the same energy, however, its half-life was measured as 13.0 ms. The 42.1γ could not have been seen by 1998Hu20 since it was outside their range of detection. From systematics, 1998Hu20 suggested that an expected low-energy 9/2+ level may correspond to the 5.8-s isomer with 42.1γ feeding the 195.5 level. This suggestion is, however, inconsistent with the observation of (42.1γ)β-coin reported by 1985Ru05. 2017Ve05 did not see any evidence for the 24-keV γ ray reported by 1985Ru05, in singles or in β-gated γ spectrum and 910γ-gated γ spectrum. 2018Ya11 also found no evidence of the existence of a 5.8-s isomer.
Q-value: S(2n)=14407 3, S(2p)=24765.1 29 (2017Wa10)