Vector analyzing power of {pi}{sup +7}Li scattering in the region of the {delta}{sub 33} resonance
Abstract
Within Glauber diffraction theory, the vector analyzing power iT{sub 11} is calculated at three energies of positively charged pions, 134, 164, and 194 MeV, incident to {sup 7}Li nuclei. These energy values lie in the region of the {delta}{sub 33} resonance in {pi}{sup {+}}N interaction, the resonance maximum being at 180 MeV. The calculation of iT{sub 11} was performed with several model {sup 7}Li wave functions, including the {alpha}tcluster and shellmodel ones. The properties of {pi}{sup +7}Li scattering are found to be sensitive to the structural features of the target nucleus. A comparison of the results of the calculations with experimental data shows that the wave functions in question and the potentials used to calculate them are quite appropriate.
 Authors:
 National Nuclear Center of the Republic of Kazakhstan, Institute of Nuclear Physics (Kazakhstan)
 Kazakh State University, Institute of Experimental and Theoretical Physics (Kazakhstan)
 Publication Date:
 OSTI Identifier:
 21076090
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Physics of Atomic Nuclei; Journal Volume: 69; Journal Issue: 4; Other Information: DOI: 10.1134/S1063778806040028; Copyright (c) 2006 Nauka/Interperiodica; Article Copyright (c) 2006 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; COMPARATIVE EVALUATIONS; COMPUTER CALCULATIONS; DIFFRACTION; INTERACTIONS; LITHIUM 7; MEV RANGE 1001000; PIONNUCLEON INTERACTIONS; PIONS PLUS; POLARIZATIONASYMMETRY RATIO; RESONANCE; SHELL MODELS; WAVE FUNCTIONS
Citation Formats
Ibraeva, E. T., Zhusupov, M. A., Zaykin, A. Yu., and Imambekov, O.. Vector analyzing power of {pi}{sup +7}Li scattering in the region of the {delta}{sub 33} resonance. United States: N. p., 2006.
Web. doi:10.1134/S1063778806040028.
Ibraeva, E. T., Zhusupov, M. A., Zaykin, A. Yu., & Imambekov, O.. Vector analyzing power of {pi}{sup +7}Li scattering in the region of the {delta}{sub 33} resonance. United States. doi:10.1134/S1063778806040028.
Ibraeva, E. T., Zhusupov, M. A., Zaykin, A. Yu., and Imambekov, O.. Sat .
"Vector analyzing power of {pi}{sup +7}Li scattering in the region of the {delta}{sub 33} resonance". United States.
doi:10.1134/S1063778806040028.
@article{osti_21076090,
title = {Vector analyzing power of {pi}{sup +7}Li scattering in the region of the {delta}{sub 33} resonance},
author = {Ibraeva, E. T. and Zhusupov, M. A. and Zaykin, A. Yu. and Imambekov, O.},
abstractNote = {Within Glauber diffraction theory, the vector analyzing power iT{sub 11} is calculated at three energies of positively charged pions, 134, 164, and 194 MeV, incident to {sup 7}Li nuclei. These energy values lie in the region of the {delta}{sub 33} resonance in {pi}{sup {+}}N interaction, the resonance maximum being at 180 MeV. The calculation of iT{sub 11} was performed with several model {sup 7}Li wave functions, including the {alpha}tcluster and shellmodel ones. The properties of {pi}{sup +7}Li scattering are found to be sensitive to the structural features of the target nucleus. A comparison of the results of the calculations with experimental data shows that the wave functions in question and the potentials used to calculate them are quite appropriate.},
doi = {10.1134/S1063778806040028},
journal = {Physics of Atomic Nuclei},
number = 4,
volume = 69,
place = {United States},
year = {Sat Apr 15 00:00:00 EDT 2006},
month = {Sat Apr 15 00:00:00 EDT 2006}
}

The inclusive vector analyzing power [ital iT][sub 11] of [pi][sup +][r arrow][sup 7]Li elastic scattering and inelastic scattering to the 0.47 MeV excited state was measured at several angles for [ital T][sub [pi]]=134, 164, and 194 MeV. The polarization effects were found to be small but nonzero, the trend of the data is well described by a coupled channels calculation. The results of the calculation are more sensitive to variations of the nuclear structure input than to variations of the reaction mechanism.

/sup 7/Li(parrowright,. pi. /sup /)/sup 8/B* and /sup 7/Li(parrowright,. pi. /sup +/)/sup 8/Li* reactions in the region of the. delta. /sub 1232/ resonance
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Lowenergy {sup 6}Li(d,{alpha}){sup 4}He and {sup 6}Li(d,p{sub 0}){sup 7}Li reactions are affected by the 2{sup +} resonance level of {sup 8}Be at E{sub x}{approx_equal}22.2 MeV. In this work, we present a new method to extract fractions of the 2{sup +} components of the reactions, which include the resonance, by using the tensoranalyzing powers, T{sub 2q}, of polarized deuterons. We measured T{sub 2q} for q=0,1,2 at the very low incident energy E{sub d}=90 keV and analyzed the data by the invariant amplitude method giving the 2{sup +} fractions as 0.90{+}0.05 for {sup 6}Li(d,p) and 0.998{+}0.003 for {sup 6}Li(d,{alpha}). For {sup 6}Li(d,p),more » 
Vector analyzing power [ital iT][sub 11] in the [pi][sup +][ital d][r arrow][ital pp] reaction in the energy region [ital T][sub [pi]]=350450 MeV
The vector analyzing power [ital iT][sub 11] of the reaction [pi][ital d][r arrow][ital pp] was measured at [ital T][sub [pi]]=350, 400, and 450 MeV. The results obtained at [ital T][sub [pi]]=350 MeV are in agreement with earlier measurements of [ital iT][sub 11] at 325 MeV. With increasing energies our results show a marked increase in the vector analyzing power up to a value close to its theoretical limit at [ital T][sub [pi]]=450 MeV ([radical][ital s] =2.40 GeV). In this energy region broad structure has been found in earlier measurements of [ital d][sigma]/[ital d][Omega] and [ital A][sub [ital y]0].