[en] Symmetric fission of ²³⁸U induced by 20 MeV protons has been used to produce new nuclei. The decay of these nuclei has been studied with new experimental techniques. The beta decay observables have been compared with the half-life predictions, atomic mass predictions and macroscopic-microscopic calculations. 26 refs

[en] Short communication

[en] Complete text of publication follows. In the Department of Physics in the University of Jyvaeskylae (JYFL) an ion guide based isotope separator (IGISOL) facility has produced many new exotic isotopes for nuclear structure research. Extension of these studies requires new means to handle ion beams so that the rare isotopes can be identified and separated from more abundant reaction products. For this purpose we have started a new project, where IGISOL technique, a gas filled radiofrequency quadrupole and a Penning-trap are uniquely combined to reduce emittance, cool, bunch and mass-purify IGISOL-beams. The project, its motivation and the first results from ion cooler will be reported together with future perspectives. (author)

[en] Design and the operation principle as well as the first results from Jyvaeskylae ion cooler are presented. (author)

[en] Precision of atomic mass measurements have improved tremendously during the last few years when ion trap technology has been applied for rare isotopes. The obtained accuracy allows projecting nuclear mass surface in various ways to investigate many underlying nuclear structure effects. A combination of ion trap technology and ion guide technique in the Accelerator Laboratory in the University of Jyvaeskylae has resulted in a vast amount of new binding data, which have been applied for nuclear studies, like evolution of shell gaps and nuclear structure in the neighborhood of N=50, Z=28. Systematic studies of masses around Z=40 and N=60 have isolated the region of sudden shape changes. The obtained data is confirmed by the complementary information from optical spectroscopy at JYFL. More precise measurements have been applied for special cases covering topics from super allowed beta decay and IMME-test to double beta decay studies and neutrino physics. In this presentation, highlights from the recent atomic mass measurements for nuclear structure studies at JYFLTRAP will be presented.(author)

[en] The following topics were dealt with: Atomic masses and fundamental constants, nuclear moments and radii, nuclear astrophysics, forms of radioactivity, direct reactions and nuclear spectroscopy, nuclei at the drip lines, cluster phenomena, nuclear structure and shapes, fission and heaviest elements, fundamental symmetries and interactions, traps for radioactive isotopes, experimental developments and applications. (HSI)

[en] The recent developments at the IGISOL-facility in Jyvaeskylae are reviewed. The spectroscopy of fission products has revealed a new set of beta-delayed neutron emitters and resulted in an identification of new isotopes in the A = 110 region. The new results on level structures of even-even refractory fission products imply the population of the two-quasiparticle structures. The spectroscopy of light fission products has lead to the observation of super asymmetric fission. The implementation of the heavy-ion ion guide has opened the possibility to apply the ion guide technique to medium and heavy neutron-deficient nuclei. Its performance in the vicinity of the N = Z line is summarized. The highlights of the research on the light proton-rich nuclei are given as well as the recent results of the collinear laser spectroscopy at IGISOL. The new project of mass-selective cooling and bunching of ion beams from the IGISOL-separator is presented. (author)

[en] A radio frequency ion cooler and buncher project at the CERN-ISOLDE facility is presented. Monte Carlo simulations, based on the ion mobility concept will be discussed. Future options for the facility are outlined

[en] Beta decays of ²³Al and ⁴¹Ti have been studied by applying ion guide techniques, gamma detection and a gas-Si telescope for charged-particle detection. The experimental beta-decay strength of ⁴¹ Ti was found to be quenched by a factor of q² = 0.64 compared to the shell model calculation below 8 MeV excitation energy in ⁴¹ Sc. This result is in line with the generally accepted value of q=0.77. The isobaric analogue state of the ⁴¹ Ti ground state was measured to contain 10(8)% isospin impurity. This relatively high value could be well reproduced by the shell model calculation in the sdfp space. Gamma-decay of the T=3/2 isobaric analogue state in ²³ Mg was observed together with its decay by proton emission. The resonance strength from the ground state of ²² Na to the isobaric analogue state in ²³ Mg was determined as 5.4(17)MeV. The experimental proton width, 13(4)MeV, agrees with the calculated value of 21 MeV

[en] A ion manipulation scheme employing a linear radiofrequency quadrupole and a Penning trap is described. It provides means to improve emittance, cool, bunch and mass-purify the existing ion beams from an Ion Guide Isotope Separator while preserving its fast operation. The ion beam cooler is operational and capable to cool ion beam down to eV regime in few ms with at least 60 percent transmission