Search results for "Scheme"

Advancing Radiation-Detected Resonance Ionization towards Heavier Elements and More Exotic Nuclides

2022

Atoms 10(2), 41 (2022). doi:10.3390/atoms10020041

Rapid Radiochemical Separation Procedures from Aqueous Solutions

1992

The state-of-the-art in the field of rapid radiochemical separation procedures is illustrated by two systems using aqueous solutions as input: ARCA, an apparatus for repetitive separations, and SISAK, a centrifuge system for continuous separations. Applications presented are: Solvent extraction of element 105 investigated with 34-s 262105 using ARCA, and decay scheme studies of the fission product 1.0-s 110Tc by means of SISAK.

Der Zerfall des94Sr

1973

The nuclide94Sr was isolated by chemical separation methods after thermal neutron induced fission of235U. Its decay properties were investigated employing semi-conductor spectrometers and coincidence techniques. A half-life of 74.1±0.3 sec was found. Besides the 1428.3 keV γ-ray we found 4 new γ-rays which could be placed in a decay scheme comprising three excited states of94Y. The 1+ states in theuu-nuclides90,92,94Y and88,90,92Rb are compared.

Evidence for violation of the Gallagher-Moszkowski rules in154Pm

1972

The existence of two radioactive species of154Pm (1.8 min ground state and 2.65 min isomer) is established. The Nilsson model configurations assigned to these states give evidence against the validity of the Gallagher-Moszkowski coupling rules in154Pm.

Decay properties of 114Ag

1971

Study of excited states of [sup 31]S through beta-decay of [sup 31]Cl for nucleosynthesis in ONe novae

2011

We have produced an intense and pure beam of 31Cl with the MARS Separator at the Texas A&M University and studied β‐decay of 31Cl by implanting the beam into a novel detector setup, capable of measuring β‐delayed protons and γ‐rays simultaneously. From our data, we have established decay scheme of 31Cl, found resonance energies with 1 keV precision, have measured its half‐life with under 1% accuracy, found its Isobar Analog State decay and by using the IMME obtained an improved mass excess for its ground state. In this contribution, a description of the used method along with selected preliminary experimental results are given and their relevance for novae nucleosynthesis discussed.

Investigation of the ββ decay of 116Cd into excited states of 116Sn

1994

Abstract The double-beta decay of 116Cd into excited states of 116Sn is experimentally and theoretically investigated. From an inclusive experiment, using an external source of isotopically enriched Cd, new most stringent limits for the allowed and non-standard-model decays into excited states are derived. It is further investigated whether the bremsstrahlung emitted by the ββ electrons can be used to derive information on the ground-state decay. For the two-neutrino-decay mode a calculation, using the quasiparticle random-phase approximation, shows that the disadvantage in phase space, in comparison to the ground-state decay, is partially compensated through the nuclear-matrix element. Exp…

In-beam and decay spectroscopy of transfermium nuclei

2008

Abstract In recent years the body of experimental data on nuclei with masses A ≃ 250 has increased dramatically. Nuclei that had been out of reach for experimental studies have now become available for study through a variety of approaches, both with in-beam spectroscopic methods and through spectroscopy following the decay of isomeric states or alpha decays at the focal plane of powerful separators. This article aims to collect the currently available experimental data on nuclei between Cm ( Z = 96 ) and Db ( Z = 105 ) . The review of this data builds on the evaluations in the literature and focusses on those datasets obtained most recently.

β-decay ofO13

2005

The beta decay of O-13 has been studied at the IGISOL facility of the Jyvaskyla accelerator centre (Finland). By developing a low-energy isotope-separated beam of O-13 and using a modern segmented charged-particle detector array an improved measurement of the delayed proton spectrum was possible. Protons with energy up to more than 12 MeV are measured and the corresponding log(ft) values extracted. A revised decay scheme is constructed. The connection to molecular states and the shell model is discussed.

Note on the decay of200Au

1972

Gamma and beta rays from the decay of200Au (48.4 min) were studied employing Ge(Li) and plastic detectors in various singles and coincidence arrangements. The intensity of the β-branch to the ground state of200Hg was determined as 79%, and the disintegration energy of200Au to be asQβ=2.26 ± 0.06 MeV. A tentative spin and parity assignment of (1,2)+ is proposed for levels at 1515.2 and 1972.5 keV in 200Hg