Production of Radioactive Nuclides in Inverse Reaction Kinematics

Efficient production of short-lived radioactive isotopes in inverse reaction kinematics is an important technique for various applications. It is particularly interesting when the isotope of interest is only a few nucleons away from a stable isotope. In this article production via charge exchange and stripping reactions in combination with a magnetic separator is explored. The relation between the separator transmission efficiency, the production yield, and the choice of beam energy is discussed. The results of some exploratory experiments will be presented.Comment: 10 pages, 4 figures, to be submitted to Nucl. Instr. and Met

Dual Magnetic Separator for TRIμ\muP

The TRI$\mu$P facility, under construction at KVI, requires the production and separation of short-lived and rare isotopes. Direct reactions, fragmentation and fusion-evaporation reactions in normal and inverse kinematics are foreseen to produce nuclides of interest with a variety of heavy-ion beams from the superconducting cyclotron AGOR. For this purpose, we have designed, constructed and commissioned a versatile magnetic separator that allows efficient injection into an ion catcher, i.e., gas-filled stopper/cooler or thermal ionizer, from which a low energy radioactive beam will be extracted. The separator performance was tested with the production and clean separation of $^{21}$Na ions, where a beam purity of 99.5% could be achieved. For fusion-evaporation products, some of the features of its operation as a gas-filled recoil separator were tested.Comment: accepted by Nucl.Instr. Meth., final versio

Development of a thermal ionizer as ion catcher

An effective ion catcher is an important part of a radioactive beam facility that is based on in-flight production. The catcher stops fast radioactive products and emits them as singly charged slow ions. Current ion catchers are based on stopping in He and H$_2$ gas. However, with increasing intensity of the secondary beam the amount of ion-electron pairs created eventually prevents the electromagnetic extraction of the radioactive ions from the gas cell. In contrast, such limitations are not present in thermal ionizers used with the ISOL production technique. Therefore, at least for alkaline and alkaline earth elements, a thermal ionizer should then be preferred. An important use of the TRI$\mu$P facility will be for precision measurements using atom traps. Atom trapping is particularly possible for alkaline and alkaline earth isotopes. The facility can produce up to 10$^9$ s$^{-1}$ of various Na isotopes with the in-flight method. Therefore, we have built and tested a thermal ionizer. An overview of the operation, design, construction, and commissioning of the thermal ionizer for TRI$\mu$P will be presented along with first results for $^{20}$Na and $^{21}$Na.Comment: 10 pages, 4 figures, XVth International Conference on Electromagnetic Isotope Separators and Techniques Related to their Applications (EMIS 2007

Knowledge and attitude of nursing students regarding older adults' sexuality: a cross-sectional study

Background: Although older adults are sexual, sexuality is infrequently discussed with them by health care professionals. Nursing students, as future professionals, can make an important contribution by developing competences in discussing intimacy and sexuality with older adults to increase quality of life and to prevent sexual problems. In order to improve these competences, current levels of knowledge and attitude need to be explored.Objectives: To investigate i) knowledge and attitudes of nursing students regarding intimacy and sexuality of older adults, ii) the difference in knowledge and attitudes of nursing students in different years of study and iii) frequency of discussing intimacy and sexuality with older adults. Design: Cross-sectional.Settings: A University of Applied Sciences in the Netherlands.Participants: Nursing students, >= 16 years who were able to read and write in Dutch.Methods: The Ageing Sexual Knowledge and Attitudes Scale was used among nursing students. Furthermore, demographic information and frequencies were collected. Data was analyzed using SPSS.Results: In total, 732 students participated. The mean knowledge-score was 43.9 (SD = 8.9), the mean attitudescore 64.3 (SD = 16.0). Unlike attitude, the level of knowledge differed significantly per year of study: first year students had the lowest and third year students the highest knowledge. Most students stated they 'never' (54.1%) or 'once' (13.2%) discussed intimacy and sexuality with older adults. Reasons to avoid talking about intimacy and sexuality were feelings of 'not being the right person' (17.3%) and 'incompetence' (14.0%).Conclusions: Nursing students had moderate knowledge and positive attitudes toward older adults' intimacy and sexuality. The knowledge-level differed per year of study, the attitude level did not. Only a minority discussed intimacy and sexuality with older adults. Moderate knowledge and positive attitudes do not mean that intimacy and sexuality is discussed. To ensure students feel responsible and competent, interventions should focus on continuous knowledge dissemination, role clarification and role modelling.Neuro-urology: functional disorders in male and female urogenital trac

Thermal Bremsstrahlung photons probing the nuclear caloric curve

Hard-photon (E$_{\gamma}>$ 30 MeV) emission from second-chance nucleon-nucleon Bremsstrahlung collisions in intermediate energy heavy-ion reactions is studied employing a realistic thermal model. Photon spectra and yields measured in several nucleus-nucleus reactions are consistent with an emission from hot nuclear systems with temperatures $T\approx$ 4 - 7 MeV. The corresponding caloric curve in the region of excitation energies $\epsilon^\star\approx$ 3{\it A} - 8{\it A} MeV shows lower values of $T$ than those expected for a Fermi fluid.Comment: 13 pages, 3 figures. To appear in Physics Letters