(Received 11 July 2018 ; in final form 04 February 2020) Abstract Today, many different kinds of ion sources have been developed. One of the most important ones is the penning or PIG ion source. Due to its simplicity of structure and longer lifetime, these ion sources are more widely considered than other ones. In this paper, design and simulation of the parameters affecting the ion beam characteristics from a penning ion source are performed using the CST software. Among the various structures of the permanent magnet around the source, the circular arrangement is found to be better for the confinement of particles inside the source. The electric potential of the anode, the cathode and the extraction electrode are found to be 15+, -500 and -3000 Volt, respectively. The decelerator and accelerator electrodes are used as ion source extraction systems. In addition, in the beam transport systems, high efficiency focusing in Einzel lens is more than that of immersion lens.

. In this study, the effect of a static and time-dependent magnetic field on a Paul trap is surveyed. Well-known stability parameters and intersection of the stability regions of a conventional Paul trap will change under an external magnetic field. The ion stability in a Paul trap in the presence of an external magnetic field is studied using both analytical and numerical methods.

The 1+/2 -> 1+/2 superallowed mixed mirror decay of Ne-19 to F-19 is excellently suited for high precision studies of the weak interaction. However, there is some disagreement on the value of the half-life. In a new measurement we have determined this quantity to be T-1/2 = 17.2832 +/- 0.0051((stat)) +/- 0.0066((syst)) s, which differs from the previous world average by 3 standard deviations. The impact of this measurement on limits for physics beyond the standard model such as the presence of tensor currents is discussed.

The $\frac{1}{2}^+ \rightarrow \frac{1}{2}^+$ superallowed mixed mirror decay of $^{19}$Ne to $^{19}$F is excellently suited for high precision studies of the weak interaction. However, there is some disagreement on the value of the half-life. In a new measurement we have determined this quantity to be $T_{1/2}$ = $17.2832 \pm 0.0051_{(stat)}$ $\pm 0.0066_{(sys)}$ s, which differs from the previous world average by 3 standard deviations. The impact of this measurement on limits for physics beyond the standard model such as the presence of tensor currents is discussed.

A target wheel with pyrolytic graphite targets is designed and constructed at the TRIμP facility to boost the production rate of Ra isotopes. Simulation, design properties and production results are discussed.

A measurement of the final state distribution of the (8)B β decay, obtained by implanting a (8)B beam in a double-sided silicon strip detector, is reported here. The present spectrum is consistent with a recent independent precise measurement performed by our collaboration at the IGISOL facility, Jyväskylä [O. S. Kirsebom et al., Phys. Rev. C 83, 065802 (2011)]. It shows discrepancies with previously measured spectra, leading to differences in the derived neutrino spectrum. Thanks to a low detection threshold, the neutrino spectrum is for the first time directly extracted from the measured final state distribution, thus avoiding the uncertainties related to the extrapolation of R-matrix fits. Combined with the IGISOL data, this leads to an improvement of the overall errors and the extension of the neutrino spectrum at high energy. The new unperturbed neutrino spectrum represents a benchmark for future measurements of the solar neutrino flux as a function of energy.

A new and independent determination of the Gamow-Teller branching ratio in the beta-decay of Na-21 is reported. The value 5.13 +/- 0.43% obtained is in agreement with the currently adopted value and the most recent measurement. In contrast to previous experiments, the present method was based on the counting of the parent Na-21 ions and the resulting 351 keV gamma-rays without coincident beta-particle detection.

Radioactive isotopes produced by the in-flight method are converted into low-energy ions with a thermal ionizer (TI) ion catcher, the operation of which is based on a hot cavity ion source. The extraction efficiency of the TI for different alkali and alkali-earth elements has been studied and compared to a model based on diffusion only. The model describes the stationary limit, i.e. the extraction efficiency, as well as the dynamic response of the TI output when the primary beam is switched on and off. (C) 2010 Elsevier B.V. All rights reserved.

C nucleus is partly due to the astrophysical interest inits spectroscopic properties, which determine the triple alpha reaction rate, and partly motivatedby the structure of this nucleus, which is not fully explained theoretically. Some aspects aredescribed in the shell model and others by a cluster structure of three alpha particles, but bothcannot so far be combined in a unified model. New experiments h ave been performed to addressthese problems. The focus of this work is on an implantation experiment, which took place inApril 2006 at KVI.International Symposium on Nuclear Astrophysics - Nuclei in the Cosmos - IXJune 25-30 2006CERN, Geneva, Switzerland

A new and independent determination of the Gamow–Teller branching ratio in the β-decay of 21Na is reported. The value 5.13 ± 0.43% obtained is in agreement with the currently adopted value and the most recent measurement. In contrast to previous experiments, the present method was based on the counting of the parent 21Na ions and the resulting 351 keV γ-rays without coincident β-particle detection.

The beta decays of N-12 and B-12 have been studied at KVI and JYFL to resolve the composition of the broad and interfering 0(+) and 2(+) strengths in the triple-alpha continuum. For the first time a complete treatment of 3 alpha decay is presented including all major breakup channels. A multilevel, many-channel R-matrix formalism has been developed for the complete description of the breakup in combination with the recently published separate analysis of angular correlations. We find that, in addition to the Hoyle state at 7.65 MeV, more than one 0(+) and 2(+) state is needed to reproduce the spectra. Broad 0(3)(+) and 2(2)(+) states are found between 10.5 and 12 MeV in this work. The presence of beta strength up to the N-12 Q-value window suggests the presence of additional 0(+) and 2(+) components in the C-12 structure at energies above 12.7 MeV.

Short lived Ra212,213,214 isotopes have been produced at the TRIμP facility in inverse kinematics via the fusion–evaporation reaction Pb206+C12 at 8MeV/u. Isotopes are separated from other reaction products online using the TRIμP magnetic separator. The energetic radium (Ra) isotopes at the exit of the separator were converted into low-energy ions with a thermal ionizer. Ra isotopes have been identified by observing their α decay and half-lifes. An improved half-life of Ra213 has been measured to be 162.0±1.7s.

A new and independent determination of the Gamow-Teller branching ratio in the β-decay of Na is reported. The value obtained of 5.13 ± 0.43 % is in agreement with the currently adopted value. This confirms that the branching ratio is not the source of the discrepancy observed between the measured β − ν angular correlation coefficient and the Standard Model prediction in a previous experiment. PACS numbers: 27.30.+t, 23.40.-s Submitted to: J. Phys. G: Nucl. Phys.

Two complementary experimental techniques have been used to extract precise branching ratios to unbound states in 12C from 12N and 12B β-decays. In the first the three α-particles emitted after β-decay are measured in coincidence in separate detectors, while in the second method 12N and 12B are implanted in a detector and the summed energy of the three α-particles is measured directly. For the narrow states at 7.654 MeV (0+) and 12.71 MeV (1+) the resulting branching ratios are both smaller than previous measurements by a factor of ≃2. The experimental results are compared to no-core shell model calculations with realistic interactions from chiral perturbation theory, and inclusion of three-nucleon forces is found to give improved agreement.