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- Hamamoto, Ikuko, et al.
(författare)
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Form-factor of low-lying Kπ=1+ excitations in rare-earth nuclei
- 1987
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Ingår i: Physics Letters B. - : Elsevier BV. - 0370-2693. ; 194:1, s. 6-10
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Tidskriftsartikel (refereegranskat)abstract
- The differential cross section of inelastic electron scattering for the low-lying “collective” Kπ=1+ excitations in rare-earth nuclei is calculated in DWBA by using microscopically calculated transition-densities. In the region of low-momentum transfer (q⪅0.5 fm-1) in which experimental data are available the shape of calcualted cross sections is almost the same for all nuclei and is slightly but systematically different from the observed shape.
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2. |
- Adiels, Lars, et al.
(författare)
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A π0 and η spectrometer of lead glass and BGO for momenta up to 1 GeV/c
- 1986
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Ingår i: Nuclear Instruments and Methods in Physics Research Section A. - : Elsevier BV. - 0168-9002 .- 1872-9576. ; 244:3, s. 380-390
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Tidskriftsartikel (refereegranskat)abstract
- A spectrometer consisting of two sets of bismuth germanium oxide (BGO) crystals and a lead-glass array has been used to measure the [pi]0 and [eta] momentum spectra produced from proton-antiproton annihilations at rest. We describe the test of the BGO sets in electron beams of energies from 50 to 450 MeV. We discuss the method of construction and calibration of the lead-glass array, as well as procedures to extract the energy and position resolutions for detected photons. A momentum resolution ([sigma]) for [pi]0’s and [eta]’s of 4% and 3%, respectively has been achieved at momenta below 1 GeV/c.
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3. |
- Adiels, L, et al.
(författare)
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Some results of experiment PS182 at LEAR
- 1986
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Ingår i: Antiproton 86. - Singspore : World Scientific Publishing. - 9971503131 ; , s. 199-204, s. 199-204
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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4. |
- Mårtensson-Pendrill, Ann-Marie, 1952
(författare)
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Calculation of a P-and T-nonconserving weak interaction in Xe and Hg with many-body perturbation theory
- 1985
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Ingår i: Physical Review Letters. - 1079-7114 .- 0031-9007. ; 54:11, s. 1153-
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Tidskriftsartikel (refereegranskat)abstract
- The electronic part of a possible P- and T-nonconserving neutral-weak-current-induced electric dipole moment in atomic Xe and Hg was calculated with many-body perturbation theory. After the effects of this P- and T-nonconserving interaction on all core orbitals were treated self-consistently, thereby including all single-particle effects to all orders but no correlation effects, the results μe=(5.2×10−23e m)CTσN and μe=−(6.0×10−22e m)CTσN, respectively, were obtained for Xe and Hg. The value for Xe can be combined with the recent experimental result, ∣∣μe(Xe129)∣∣
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6. |
- Adiels, Lars, et al.
(författare)
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Experimental study of the inclusive η-spectrum from proton-antiproton annihilations at rest in liquid hydrogen
- 1989
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Ingår i: Zeitschrift für Physik C Particles and Fields. - 0170-9739 .- 1431-5858. ; 42, s. 49-58
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Tidskriftsartikel (refereegranskat)abstract
- The inclusive η-momentum spectrum from Mathematical expression annihilations at rest in liquid hydrogen was measured at LEAR. Branching ratios were obtained for Mathematical expression, and ηη(8.1±3.1)Ã10-5. An upper limit for Mathematical expression of 1.8Ã10-4 at 95% CL was found. The ratio of the branching ratios is BR(ηÏvariant)/BR(ηÏ)=0.51-0.06+0.20. For the ratio of branching ratios into two pseudoscalar mesons, we have BR(ηÏ0)/BR(Ï0Ï0)=0.65±0.14, BR(ηη)/BR(Ï0Ï0), BR(ηηâ²)/BR(Ï0Ï0) at 95% CL, and BR(ηη)/BR(ηÏ0). © 1989 Springer-Verlag.
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7. |
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8. |
- Adiels, L, et al.
(författare)
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π0 and η spectroscopy at LEAR
- 1985
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Ingår i: Physics with antiprotons at LEAR in the ACOL era. - Gif sur Yvette : Editions Frontières. - 2863320351 ; , s. 359-360
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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10. |
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