First Report of a Doublet 2209-keV State in 100^{100}Zr

International audienceA β-decay experiment aiming at investigation of the low-spin structure of 100Zr was performed using the GRIFFIN spectrometer at TRIUMFISAC. Based on the obtained data, a new 2 + state is postulated which is degenerate in energy with the established (5+) level at 2209 keV

Identifying the spin-trapped character of the <math><mmultiscripts><mi>Si</mi><mprescripts/><none/><mn>32</mn></mmultiscripts></math> isomeric state

International audienceThe properties of a nanosecond isomer in Si32, disputed in previous studies, depend on the evolution of proton and neutron shell gaps near the island of inversion. We have placed the isomer at 5505.2(2) keV with Jπ=5−, decaying primarily via an E3 transition to the 21+ state. The E3 strength of 0.0841(10) W.u. is unusually small and suggests that this isomer is dominated by the (νd3/2)−1⊗(νf7/2)1 configuration, which is sensitive to the N=20 shell gap. A newly observed 41+ state is placed at 5881.4(13) keV; its energy is enhanced by the Z=14 subshell closure. This indicates that the isomer is located in a yrast trap, a feature rarely seen at low mass numbers

Decay studies in the A ∼ 225 Po-Fr region from the DESPEC campaign at GSI in 2021

The HISPEC-DESPEC collaboration aims at investigating the structure of exotic nuclei formed in fragmentation reactions with decay spectroscopy measurements, as part of the FAIR Phase-0 campaign at GSI. This paper reports on first results of an experiment performed in spring 2021, with a focus on β-decay studies in the Po-Fr nuclei in the 220 < A < 230 island of octupole deformation exploiting the DESPEC setup. Ion-beta correlations and fast-timing techniques are being employed, giving an insight into this difficult-to-reach region

Decay studies in the A∼225 Po-Fr region from the DESPEC campaign at GSI in 2021

The HISPEC-DESPEC collaboration aims at investigating the structure of exotic nuclei formed in fragmentation reactions with decay spectroscopy measurements, as part of the FAIR Phase-0 campaign at GSI. This paper reports on first results of an experiment performed in spring 2021, with a focus on β-decay studies in the Po-Fr nuclei in the 220 <A< 230 island of octupole deformation exploiting the DESPEC setup. Ion-beta correlations and fast-timing techniques are being employed, giving an insight into this difficult-to-reach region

Decay studies in the A ∼ 225 Po-Fr region from the DESPEC campaign at GSI in 2021

The HISPEC-DESPEC collaboration aims at investigating the structure of exotic nuclei formed in fragmentation reactions with decay spectroscopy measurements, as part of the FAIR Phase-0 campaign at GSI. This paper reports on first results of an experiment performed in spring 2021, with a focus on β-decay studies in the Po-Fr nuclei in the 220 &lt; A &lt; 230 island of octupole deformation exploiting the DESPEC setup. Ion-beta correlations and fast-timing techniques are being employed, giving an insight into this difficult-to-reach region

Decay studies in the A∼225 Po-Fr region from the DESPEC campaign at GSI in 2021

International audienceThe HISPEC-DESPEC collaboration aims at investigating the structure of exotic nuclei formed in fragmentation reactions with decay spectroscopymeasurements, as part of the FAIR Phase-0 campaign at GSI. This paper reportson first results of an experiment performed in spring 2021, with a focus on β-decaystudies in the Po-Fr nuclei in the 220 <A< 230 island of octupole deformationexploiting the DESPEC setup. Ion-beta correlations and fast-timing techniques arebeing employed, giving an insight into this difficult-to-reach region