2001Ho06 (also 2002Ho11, 2011Ac01, 2015Mu16 review): ²⁷⁰Ds produced in ²⁰⁷Pb(⁶⁴Ni,n),E=317 MeV using UNILAC accelerator facility and SHIP separator at GSI. Experiments performed under an international collaboration between laboratories in Germany, Slovakia, Poland, and Russia. Of the eight correlated events detected, six involved EVR-α1-α2-SF correlations, and two EVR-α2-SF. Two groups for the six α-decays assigned to ²⁷⁰Ds as follows: events #1, #2, and #3 belonged to the g.s., and events #4, #5, and #6 to states originating from a K-isomer (as in the case of the longest half-life in event #6) or γ-decay.

History of correlated events observed by 2001Ho06:

Event #1:

E_α1=10987 keV 90, Δt₁=0.07 ms, assigned to ²⁷⁰Ds

E_α2=4168 keV (escaped), Δt₂=0.43 ms, assigned to ²⁶⁶Hs

E_SF=189 MeV, Δt₃=11.02 ms, assigned to ²⁶²Sg (SF decay)

Event #2:

E_α1=11075 keV 90, Δt₁=0.18 ms, assigned to ²⁷⁰Ds

E_α2=10196 keV 20, Δt₂=0.87 ms, assigned to ²⁶⁶Hs

E_SF=193 MeV, Δt₃=10.26 ms, assigned to ²⁶²Sg (SF decay)

Event #3:

E_α1=1925 keV (escaped), Δt₁=0.20 ms, assigned to ²⁷⁰Ds

E_α2=10173 keV 90, Δt₂=2.79 ms, assigned to ²⁶⁶Hs

E_SF=164 MeV, Δt₃= 8.84 ms, assigned to ²⁶²Sg (SF decay)

Event #4:

E_α1=11151 keV 20, Δt₁=2.00 ms, assigned to ^270mDs

E_α2=10171 keV 20, Δt₂=18.22 ms, assigned to ²⁶⁶Hs

E_SF=199 MeV, Δt₃=13.06 ms, assigned to ²⁶²Sg (SF decay)

Event #5:

E_α1=12147 keV 50, Δt₁=10.35 ms, assigned to ^270mDs

E_α2=10281 keV 90, Δt₂=9.63 ms, assigned to ²⁶⁶Hs

E_SF=215 MeV, Δt₃=7.77 ms, assigned to ²⁶²Sg (SF decay)

Event #6:

E_α1=10954 keV 20, Δt₁=17.71 ms, assigned to ^270mDs

E_α2=10180 keV 20, Δt₂=0.34 ms, assigned to ²⁶⁶Hs

E_SF=190 MeV, Δt₃=3.98 ms, assigned to ²⁶²Sg (SF decay)

Event #7:

E_α2=578 keV (escaped), Δt₂=0.46 ms, assigned to ²⁶⁶Hs

E_SF=227 MeV, Δt₃=2.00 ms, assigned to ²⁶²Sg (SF decay)

Event #8:

E_α2=10306 keV 90, Δt₂=5.40 ms, assigned to ²⁶⁶Hs

E_SF=177 MeV, Δt₃=33.91 ms, assigned to ²⁶²Sg (SF decay)

2012Ac04: 25 additional decay chains were observed at GSI using the same reaction and SHIP separator as in 2001Ho06. These chains were of three different types of correlations: EVR-α-α-SF, EVR-α-SF, and EVR-α-α-α-SF. Complete analysis of these data are yet to be published as mentioned in author’s review articles 2017Ac02 and 2015Ac04. Revised half-life of ²⁷⁰Ds α decay was deduced in this work. These experiments are also briefly described by d. Ackermann et al., in GSI Annual Scientific reports (GSI-2010, p200 (published in 2011), and GSI-2011, p208 (published in 2012))

For theoretical studies, consult Nuclear Science References (NSR) database at NNDC, BNL for 98 primary references dealing with the half-lives and other aspects of nuclear structure in this mass region

Q-value: Estimated uncertainty=470 for S(p) (2017Wa10)

Q-value: S(2n)=15110 310, S(2p)=2730 290, Q(εp)=2830 130 (syst, 2017Wa10)