Matches in SemOpenAlex for { <https://semopenalex.org/work/W2022025260> ?p ?o ?g. }
- W2022025260 abstract "We present a formalism of distorted wave impulse approximation for analyzing spin observables in nucleon inelastic and charge-exchange reactions leading to the continuum. It utilizes response functions calculated by the continuum random-phase approximation, which include the effective mass, the spreading widths, and the $ensuremath{Delta}$ degrees of freedom. The Fermi motion is treated by the optimal factorization, and the nonlocality of the nucleon-nucleon t matrix by an averaged reaction plane approximation. By using the formalism we calculated the spin-longitudinal and the spin-transverse cross sections, ${mathrm{ID}}_{q}$ and ${mathrm{ID}}_{p},$ of ${}^{12}mathrm{C},$ ${}^{40}mathrm{Ca}$ $(stackrel{ensuremath{rightarrow}}{p},stackrel{ensuremath{rightarrow}}{n})$ at 494 and 346 MeV. The calculation reasonably reproduced the observed ${mathrm{ID}}_{q},$ which is consistent with the predicted enhancement of the spin-longitudinal response function ${R}_{mathrm{L}}.$ However, the observed ${mathrm{ID}}_{p}$ is much larger than the calculated one, which was consistent with neither the predicted quenching nor the spin-transverse response function ${R}_{mathrm{T}}$ obtained by the ${(e,e}^{ensuremath{'}})$ scattering. The Landau-Migdal parameter ${g}_{Nensuremath{Delta}}^{ensuremath{'}}$ for the $Nensuremath{Delta}$ transition interaction and the effective nucleon mass at the nuclear center ${m}_{N}^{*}(r=0)$ are treated as adjustable parameters. The present analysis indicates that the smaller ${g}_{Nensuremath{Delta}}^{ensuremath{'}}(ensuremath{approx}0.3)$ and ${m}_{N}^{*}(0)ensuremath{approx}0.7$ ${m}_{N}$ are preferable. We also investigate the validity of the plane-wave impulse approximation with the effective nucleon number approximation for the absorption, by means of which ${R}_{mathrm{L}}$ and ${R}_{mathrm{T}}$ have conventionally been extracted." @default.
- W2022025260 created "2016-06-24" @default.
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- W2022025260 date "2001-03-23" @default.
- W2022025260 modified "2023-10-02" @default.
- W2022025260 title "Distorted wave impulse approximation analysis for spin observables in nucleon quasielastic scattering and enhancement of the spin longitudinal response" @default.
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- W2022025260 doi "https://doi.org/10.1103/physrevc.63.044609" @default.
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