1991Kr15: ⁸⁴Ga produced and identified in ²³⁸U(p,F),E=600 MeV, followed by mass separation of fission products. Measured β-delayed neutrons, T_1/2 and %β^-n from the decay of ⁸⁴Ga at CERN-ISOLDE facility.

2003Pe18, 2006Pe20: ²³⁸U(n,f), measured Eγ, Iγ, γ(t), γγ-coin, βγ-coin following mass separation by ISOL method at the PARRNe facility in Orsay.

2009Le26 (also 2009Ve11): ⁸⁴Ga isotope produced in U(γ,F),E=50 MeV reaction at PARRNe on-line mass separator within the ALTO facility. Bremsstrahlung beam was produced by 50-MeV electron beam hitting a UC_x target, followed by mass separation of fission fragments. Measured Eγ, Iγ, βγ-coin. The authors propose an isomer based on the gamma intensities from ⁸⁴Ge β^- decay and ⁸⁴Ga β-delayed neutron decay.

2010Wi03 (also 2009Gr06): ⁸⁴Ga produced in ²³⁸U(p,F),E(p)=54 MeV reaction. Reaction products were accelerated to 225 MeV in the ORNL Tandem van de Graaff generator. Measured Eγ, Iγ, γγ-coin, (fragment)γ-coin, (ion-tagged γ-ray spectra), βγ(ion)-coin, βnγ-coin using an array composed of four Ge clover and two plastic scintillator detectors. Comparison with spherical HFB calculations. No evidence was found for the existence of two isomers in ⁸⁴Ga, as was proposed in 2009Le26. 2010Wi03 state that 1046γ is in ⁸³Ge, not in ⁸⁴Ge as was suggested by 2009Le26.

2013Ko32: ⁸⁴Ga produced in U(γ,F),E=50 MeV, the bremsstrahlung beam was produced in 50 MeV (10 μA) electron beam incident on a thick UC_x target. It was followed by selective photoionization using the ALTO resonant laser ion source. ⁸⁴Ga was then mass separated at the PARRNe online mass separator at IPN, Orsay facility, and implanted on Al-coated mylar tape. Measured Eγ, Iγ, γγ-coin, βγ-coin and T_1/2 of ⁸⁴Ga isotope using two HPGe detectors and a plastic scintillator.

2016Ma50: ⁸⁴Ga isotope produced in the reaction U(p,F),E(p)=50 MeV, at the RIB-HRIBF-ORNL facility, where the ⁸⁴Ga radioactive ion beam was extracted, mass separated and transmitted to the Low Energy Radioactive Ion Beam Spectroscopy Station. Measured Eγ, Iγ, E(n), I(n), E(β), nβ-coin using two HPGe detectors, the VANDLE array of 48 plastic scintillators for neutron time-of-flight measurements, and two plastic scintillators surrounding the implantation point for β particles. Deduced β-delayed neutron emission probability or P_n

2017Ve01: radioactive ion beam of ⁸⁴Ga at 30 keV was produced in photofission of ²³⁸U using UC_x pellets containing about 60 g of ²³⁸U. The photons were created by 50-MeV primary electron beam bombarding a Ta target heated up to ≈2000|’C. The Ga atoms were ionized with the Resonant Ionization Laser Ion source (RILIS) using a two-step ionization system. Extracted 30 keV ion beam was delivered to PARRNe on-line separator at ALTO ISOL facility. Mass-separated ⁸⁴Ga beam was then sent to β-decay counting station BEDO where it was collected on mylar tape at the center of the detection system of 4π ³He neutron counter TETRA, an HPGe detector for γ radiation and plastic 4πβ array for electrons. Measured Eγ, Iγ, β spectrum, β-gated γ and β(neutron)-gated γ spectra, delayed neutrons, %β^-n of ⁸⁴Ga decay for 17971 counting cycles in beam-off and beam-on collection/counting steps. The measurements reported in this work were a test case for the ³He neutron-counter TETRA installed behind the PARRNe mass separator at the electron-driven ALTO-ISOL facility. Experimental details are given in 2016Te09

2019Yo03: ⁸⁴Ga produced in ⁹Be(²³⁸U,F),E(²³⁸U)=345 MeV/nucleon on a 4-mm thick ⁹Be target at the RIBF-RIKEN facility. Fragments separated and identified using the BigRIPS separator, then implanted into active stoppers consisting of double-sided silicon strip detectors. Measured Eγ, Iγ, E(n), I(n), nβ-coin, T_1/2, %β^-n using two HPGe detectors for γ rays and the BRIKEN detector consisting of 140 ³He counters for neutrons.

Mass measurement: 2020Re04

No evidence for an isomer with T_1/2<0.085 s and Jπ=(3-,4-) as proposed in 2009Le26

In literature, there are no studies of decay of ⁸⁴Zn to ⁸⁴Ga, with an exception that 2014XuZZ report T_1/2 of decay of ⁸⁴Zn by β(108.5γ)-coin method, implying that 108.5-keV γ ray possibly deexcites a level in ⁸⁴Ga.

Q-value: Estimated uncertainties (2021Wa16): 300 for S(p) and Q(α)

Q-value: Q(β^-n)=8811 30, S(2n)=7306 30, S(2p)=32940 400 (syst) (2021Wa16). Q(β^-2n)=5180 30 (deduced by evaluator from mass excesses in 2021Wa16)