Elastic electron deuteron scattering on a tensor polarized solid ND3 target

Boden, B.; Burkert, Volker; Kroesen, Gmw Gerrit; Leenen, M.; Mehnert, W.; Sauerwein, R. R.; Schablitzky, H.-D.; Schmitz, Helmut; Althoff, K.H.; Dostert, R.; Hewel, T.; Kaul, O.; Kohlgarth, E.; Meyer, W.; Schilling, E.; Thiel, Walter

doi:10.1007/bf01555492

Cited by 34 publications

(22 citation statements)

References 15 publications

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“…The target tensor polarization or alignment (P zz or A) is generally rather small: it is related to the vector polarization by P zz = 2 − 4 − 3P 2 z [110] and the obtained values of P z are at best of the order of 0.5.…”

Section: B Polarized Deuteron Targets -Polarimetersmentioning

confidence: 99%

The Deuteron: Structure and Form Factors

Garçon

Orden

2001

Advances in the Physics of Particles and Nuclei

177

176

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Section: B Polarized Deuteron Targets -Polarimetersmentioning

confidence: 99%

The Deuteron: Structure and Form Factors

Garçon

Orden

2001

Advances in the Physics of Particles and Nuclei

177

176

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“…[13], stars from Ref. [9], and the solid circles from the present experiment. The curves represent various theoretical models: short-dashed for the NRIA including MEC from Ref.…”

mentioning

confidence: 99%

“…This has prompted development of both polarized 2 H targets for use with internal [4] or external beams [5] and polarimeters for measuring the polarization of recoiling hadrons [6]. Indeed the first round of measurements of spin-dependent e-2 H scattering has been carried out at Novosibirsk [7,8], Bonn [9], MITBates [10,11], and SLAC [12].…”

mentioning

confidence: 99%

Measurement of Tensor Analyzing Powers for Elastic Electron Scattering from a Polarized2H Target Internal to a Storage Ring

Ferro‐Luzzi¹,

Bouwhuis²,

Passchier³

et al. 1996

Phys. Rev. Lett.

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We report an absolute measurement of the tensor analyzing powers T 20 and T 22 in elastic electrondeuteron scattering at a momentum transfer of 1.6 fm 21 . The novel approach of this measurement is the use of a tensor polarized 2 H target internal to an electron storage ring, with in situ measurement of the polarization of the target gas. Scattered electrons and recoil deuterons were detected in coincidence with two large acceptance nonmagnetic detectors. The techniques demonstrated have broad applicability to further measurements of spin-dependent electron scattering.[ S0031-9007(96) Measurements of spin-dependent electron scattering have the potential to greatly enhance our understanding of nucleon and nuclear structure. For example, spin observables in elastic, quasielastic, and deep-inelastic scattering from polarized deuterium are predicted to provide important information on the effects of D-wave components in the ground state of 2 H [1], the largely unknown charge form factor of the neutron [2], and the neutron spin structure functions [3]. This has prompted development of both polarized 2 H targets for use with internal [4] or external beams [5] and polarimeters for measuring the polarization of recoiling hadrons [6]. Indeed the first round of measurements of spin-dependent e-2 H scattering has been carried out at Novosibirsk [7,8], Bonn [9], MITBates [10,11], and SLAC [12].The measurement of analyzing powers and spincorrelation parameters in spin-dependent electron scattering from polarized nuclei is optimally performed by scattering electrons from a pure and highly polarized target. Polarized internal gas targets in electron storage rings have the advantage that spin-dependent scattering from chemically and isotopically pure atomic species of high polarization can be realized. They offer rapid polarization reversal and flexible orientation of the nuclear spin direction by using low magnetic holding fields, a low thickness at high luminosity which allows for the detection of low-energy recoiling hadrons, and access to a broad kinematic range by using large acceptance detectors. For polarized deuterium one has the additional ability to reverse the tensor polarization, P zz , at fixed vector polarization, P z , and vice versa. Subsequently, small systematic errors can be expected.The first pioneering measurements [7,8] with a polarized deuterium internal target have been carried out at VEPP-3 in Novosibirsk. They realized a target with a thickness limited to about 3 3 10 11 atoms cm 22 [8] as viewed by their detectors. Recently, this was increased by an order of magnitude [13]. Since many mechanisms can depolarize the target nuclei in the storage cell, and no polarimeters were available to measure the target polarization in situ, they normalized one datum to a theoretical prediction, setting the scale for the other data points [8].The electron spin-averaged cross section for elastic electron-deuteron scattering can be expressed [1] as s s 0

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“…Використано такi позначення для ХФД з її коефiцiєнтами розкладу: 1 -ХФД з функцiями Лагерра [56]; 2 -аналiтичнi форми Дубовiченко (5) [43]; 3 -ХФД з [57]; 4 -новi аналiтичнi форми (7) [35]. Крiм цього, порiвняно отриманi теоретичнi значення t 20 з експериментальними даними колаборацiй Bates [58,59,60], BLAST [61,62,63], JLab [48,64], NIKHEF [65,66], Saclay [67], VEPP-3 [68,69,70,71,72] та оглядiв Boden [73], Garcon [60], Abbott [74]. Хороше узгодження значень наявне для областi значень iмпульсiв p=1-4 fm −1 .…”

Section: Fig 1 кIнематика I системи координат для розсIяння поляризunclassified

“…де P zz -тензорна поляризацiя дейтронiв мiшенi. Теоретичнi значення тензора поляризованої мiшенi i тензорної поляризацiї вiдповiдно[73] …”

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Analytical forms of the wave function and the asymmetry of the polarization characteristics of the deuteron

Zhaba¹

2017

J. Phys. Stud.

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The basic analytical forms for the deuteron wave function (DWF) in coordinate representation have been reviewed. The asymptotic behaviors of DWF near the origin of coordinates have been analyzed. New analytical forms DWF as a product of exponential function r n by the sum of the exponential terms A i *exp(-a i * r 3 ) are applied for calculation polarization characteristics of the deuteron. Numerical calculations have been done for realistic phenomenological potential Nijmegen groups -Reid93. In paper the results of angular asymmetry for deuteron vectort 10 , t 11 and tensort 20 , t 21 , t 22 polarizations are submitted. Except for angular asymmetry, is present as well momentum asymmetry for deuteron vector t 1i polarizations. Influence of approximation DWF in coordinate representation on the subsequent results of calculations tensor polarization t 20 is investigated. Comparison of values t 20 is made at θ=70 degree if to apply four different approximations DWF for same NN potential Reid93. At comparison of the received theoretical values t 20 with experimental data of world collaborations and reviews the good coordination for area of values momentum p=1-4 fm −1 is observed. Within the framework of a method of invariant amplitude have been calculated spin observables in backward elastic dp-scattering -tensor analyzing power T 20 and polarization transfer κ 0 . Are compared values for κ 0 and correlation κ 0 − T 20 with experimental data's. In a wide range of momentums p and angles θ scattering have been presented asymmetry for tensor analyzing power T 20 and T 22 , which characterize photoproduction for negative π-meson from deuteron in reaction γ(d,π − )pp. Symmetry of values T 20 and T 22 concerning a angle 90 degree is observed. Ratio R for vector P x and tensor P xz polarizations is characterized by angular asymmetry. So, near to "A y puzzle" remain actual theoretical and experimental researches of other polarization characteristics for processes at participation deuteron for which is present both angular, and momentum asymmetry. The obtained results of the deuteron vector and tensor polarizations t ij (p) give some information about the electromagnetic structure of the deuteron and the differential cross section of double scattering.Аналiтичнi форми хвильової функцiї i асиметрiя поляризацiйних характеристик дейтрона В.I. ЖабаУжгородський нацiональний унiверситет, кафедра теоретичної фiзики, вул. Волошина, 54, Ужгород, 88000, Україна Проведено огляд та аналiз асимптотичної поведiнки основних аналiтичних форм хвильової функцiї дейтрона (ХФД) в координатному представленнi. Для розрахунку поляризацiйних характеристик дейтрона застосовано новi аналiтичнi форми ХФД у виглядi добутку степеневої функцiї r n на суму експоненцiальних членiв A i ·exp(-a i ·r 3 ). Для чисельних обчислень використано реалiстичний феноменологiчний потенцiал Reid93. У роботi представленi результати кутової асиметрiї для векторних t 10 , t 11 i тензорних t 20 , t 21 , t 22 дейтронних поляризацiй. Окрiм кутової асиметрiї, наявна й iмпульсна ...

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Elastic electron deuteron scattering on a tensor polarized solid ND3 target

Cited by 34 publications

References 15 publications

The Deuteron: Structure and Form Factors

The Deuteron: Structure and Form Factors

Measurement of Tensor Analyzing Powers for Elastic Electron Scattering from a Polarized2H Target Internal to a Storage Ring

Analytical forms of the wave function and the asymmetry of the polarization characteristics of the deuteron

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