Low-lying resonance states in the Be-9 continuum

Excited states in Be-9 from 2 to 9 MeV are studied via beta delayed particle emission from Li-9. The broad overlapping particle unbound states are investigated using an extension of an experimental method developed for dealing with three-body decays of broad isolated levels. The results confirm the existence of a broad state at 5 MeV, with a width of 2 MeV. Angular correlations are used for firm spin determinations for this and other levels

Low-lying resonance states in the Be-9 continuum

Excited states in Be-9 from 2 to 9 MeV are studied via beta delayed particle emission from Li-9. The broad overlapping particle unbound states are investigated using an extension of an experimental method developed for dealing with three-body decays of broad isolated levels. The results confirm the existence of a broad state at 5 MeV, with a width of 2 MeV. Angular correlations are used for firm spin determinations for this and other levels

Study of Li-10 via the Li-9(H-2, p) reaction at REX-ISOLDE

The Click to view the MathML source reaction has been investigated at 2.36 MeV/u at the REX-ISOLDE facility. In this Letter we focus on the Click to view the MathML source channel which potentially holds spectroscopic information on the unbound nucleus 10Li. The experimental excitation energy spectrum and angular distribution are compared with CCBA calculations. These calculations clearly support the existence of a low-lying (s) virtual state, with a (negative) scattering length of the order asnot, vert, similar1324 fm and a p1/2 resonance with an energy of Ersimilar, equals0.38 MeV and a width of Γsimilar, equals0.2 MeV

Coulomb breakup of 17Ne from the viewpoint of nuclear astrophysics

By the Coulomb breakup of 17Ne, the time-reversed reaction 15O(2p,γ)17Ne has been studied. This reaction might play an important role in the rp process, as a break-out reaction of the hot CNO cycle. The secondary 17Ne ion beam with an energy of 500 MeV/nucleon has been dissociated in a Pb target. The reaction products have been detected with the LAND-R3B experimental setup at GSI. The preliminary differential and integral Coulomb dissociation cross section sCoul has been determined, which then will be converted into a photo-absorption cross section sphoto, and a two-proton radiative capture cross section σcap. Additionally, information about the structure of the 17Ne, a potential two-proton halo nucleus, will be received. The analysis is in progress. \ua9 Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence

Radon i kontoret – L\ue5ngt under gr\ue4nsv\ue4rdet, men ….

En del av Chalmers byggnader inneh\ue5ller bl\ue5betong som \ue4r k\ue4nt f\uf6r att avge radon. M\ue4tningen visar att radongashalten i kontoret och n\ue4rliggande lokaler ligger p\ue5 en niv\ue5 som utan tvivel ligger under stipulerat gr\ue4nsv\ue4rde.Intressant att notera \ue4r dock att d\ue5 ventilationen \ue4r avst\ue4ngd s\ue5 n\ue5s niv\ue5er som tempor\ue4rt \uf6verskrider gr\ue4nsv\ue4rdet.Detta f\uf6rh\ue5llande g\ue4ller veckoslut och l\ue5nghelger som jul och ny\ue5r. Nattetid syns ocks\ue5 f\uf6rh\uf6jda radongashalter. Gr\ue4nsv\ue4rdet \ue4r ett \ue5rsmedelv\ue4rde som inte explicit uppm\ue4rksammar variationer. Vi f\ue5r inte lov att l\ue5ta pl\ue5nboksfr\ue5gor styra v\ue5rt inomhusklimat genom att prioritera budget h\uf6gre \ue4n h\ue4lsa! Bilar besiktigas regelbundet och f\uf6r bost\ue4der och arbets-platser med markradonproblem finns anledning att \ue5terkommande g\uf6ra m\ue4tningar

Halo-nuclei at ISOLDE

Nuclear halo states are studied experimentally with a wide range of techniques. We review the results coming from ISOLDE, emphasizing the beta -decay experiments. Some general comments on the role of beta -decays for halo research are given. We outline the possibilities for low-energy reaction experiments arising from REX-ISOLDE

Halo-nuclei at ISOLDE

Nuclear halo states are studied experimentally with a wide range of techniques. We review the results coming from ISOLDE, emphasizing the beta -decay experiments. Some general comments on the role of beta -decays for halo research are given. We outline the possibilities for low-energy reaction experiments arising from REX-ISOLDE

Shape-isomer studies with resonance neutron capture

An experiment searching for formation of super-deformed shape isomers in odd uranium isotopes following neutron capture is designed at the GELINA neutron source of IRMM. We focus on neutron energies around the so-called intermediate structure in the fission cross-section, where the coupling between compound states above the first and the second minimum is largest. The experimental arrangement is described. The results of a feasibility study on the population of the shape isomer in 235U, using a 234U target, together with the results from first run with a 238U target are presented

Limits on Neutrino-Mixing from the Internal Bremsstrahlung Spectrum of I-125

The massive antineutrino recently reported by Simpson in an experiment on tritium decay has not been confirmed by experiments on 35S decay. As an independent check, we report here the negative result of a search for the corresponding antiparticle (a massive neutrino) using the decay of 125I. As a by-product, we give accurate data on internal-bremsstrahlung spectra which we have followed over close to four decades in intensity, and we report a new way of measuring its E1/M1 ratio. The experiment provides a new and very accurate value for the 125I-125Te mass difference of 186.1 \ub1 0.3 keV