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| 2. |
- Sims, D. A., et al.
(författare)
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The He(γ,n) reaction: a potential testing ground for the alpha-particle wavefunction
- 1998
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Ingår i: Physics Letters B. - 0370-2693. ; 442:1-4, s. 43-47
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Tidskriftsartikel (refereegranskat)abstract
- Differential cross sections (σ(Eγ,θn)) for the He(γ,n) reaction have been measured at Eγ=50–71 MeV and θn=30–120°. These data are compared with theoretical predictions where a microscopic calculation of the He and He wavefunctions has been made within the Alt-Grassberger-Sandhas, integral-equation formalism.
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| 3. |
- Sims, D. A., et al.
(författare)
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(γ,n) study of the isovector quadrupole resonance in 40Ca
- 1997
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Ingår i: Physical Review C: covering nuclear physics. - 2469-9985. ; 55:3, s. 1288-1294
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Tidskriftsartikel (refereegranskat)abstract
- The forward-to-backward asymmetry of neutrons emitted in the 40Ca(γ,n0) reaction was measured at photon energies in the range of 27–50 MeV. An energy-dependent asymmetry was observed that is interpreted as evidence of interference between the isovector quadrupole resonance and the giant dipole resonance. Data analysis in terms of semiclassical and direct-semidirect models estimate the isovector quadrupole resonance to be at an excitation energy of 31.0±1.5 MeV, with a width of 16.0±1.5 MeV, and exhausting most of the energy-weighted sum rule for the isovector quadrupole resonance.
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| 4. |
- Adler, Jan-Olof, et al.
(författare)
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A broad range tagging spectrometer for the MAX-laboratory
- 1997
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Ingår i: Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. - 0167-5087. ; 388:1-2, s. 17-26
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Tidskriftsartikel (refereegranskat)abstract
- A broad range tagging spectrometer together with a new beam transport system for photonuclear experiments at the MAX-laboratory in Lund is described. The spectrometer consists of a quadrupole followed by an Elbek-type dipole and has a large momentum acceptance. It can produce both polarized and unpolarized tagged photons in the energy range 10–80 MeV with an energy resolution of about 300 keV.
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| 5. |
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| 6. |
- Larsson, K, et al.
(författare)
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The Saccharomyces cerevisiae SOP1 and SOP2 genes, which act in cation homeostasis, can be functionally substituted by the Drosophila lethal(2)giant larvae tumor suppressor gene.
- 1998
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Ingår i: The Journal of biological chemistry. - : Elsevier BV. - 0021-9258 .- 1083-351X. ; 273:50, s. 33610-8
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Tidskriftsartikel (refereegranskat)abstract
- By complementation of a salt-sensitive mutant of Saccharomyces cerevisiae, we cloned the SOP1 gene, encoding a 114.5-kDa protein of 1033 amino acids. Cells deleted for SOP1 exhibited sensitivity to sodium stress, but showed no sensitivity to general osmotic stress. Following exposure of sop1Delta cells to NaCl stress, the intracellular Na+ level and the Na+/K+ ratio rose to values significantly higher than in wild type cells. Deletion of SOP2, encoding a protein sharing 54% amino acid identity with Sop1p, produced only slight Na+ sensitivity. Cells carrying a sop1Deltasop2Delta double deletion became, however, hypersensitive to Na+ and exhibited increased sensitivity also to Li+ and K+, suggesting involvement of both SOP1 and SOP2 in cation homeostasis. The predicted amino acid sequences of Sop1p and Sop2p show significant homologies with the cytoskeletal-associated protein encoded by the Drosophila lethal(2)giant larvae tumor suppressor gene. Immunolocalization of Sop1p revealed a cytoplasmic distribution and cell fractionation studies showed that a significant fraction of Sop1p was recovered in a sedimentable fraction of the cytosolic material. Expression of a Drosophila l(2)gl cDNA in the sop1Deltasop2Delta strain partially restored the Na+ tolerance of the cells, indicating a functional relationship between the Sop proteins and the tumor suppressor protein, and a novel function in cell homeostasis for this family of proteins extending from yeast to human.
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| 7. |
- Proff, S, et al.
(författare)
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Electromagnetic polarizabilities of nucleons bound in 40Ca, 16O and 4He
- 1999
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Ingår i: Nuclear Physics A. - 0375-9474. ; 646:1, s. 67-82
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Tidskriftsartikel (refereegranskat)abstract
- Differential cross sections for elastic scattering of photons have been measured for 40Ca at energies of 58 and 74 MeV and for 16O and 4He at 61 MeV, in the angular range from 45° to 150°. Evidence is obtained that there are no significant in-medium modifications of the electromagnetic polarizabilities except for those originating from meson exchange currents.
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