p- Radiative capture and the 3He D-state

Jourdan, J.; Baumgartner, M.; Burzyński, Stanisław; Egelhof, P.; Henneck, R.; Klein, Abraham; Pickar, M. A.; Plattner, G.R.; Ramsay, W. D.; Roser, H.W.; Sick, I.; Torre, Jean‐Marie

doi:10.1016/0375-9474(86)90011-4

Cited by 48 publications

(16 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Whereas for the description of the differential cross section the use of the Born approximation leads to an underestimate of order 15%, the tensor analyzing power A yy is underpredicted by more than a factor of 2. The importance of initial state interaction in these observables has been observed already in the calculation by J. Torre [12]. More recently a calculation by A.C. Fonseca and D.R.…”

Section: Comparison To Theorymentioning

confidence: 72%

“…As will be discussed in the last section the tensor analyzing power at these two energies has rather different sensitivities to the underlying physics. As a third extension we also measured the data of the deuteron vector analyzing power A The data points are from [12,14,15,16,17,18]. The dashed line represents the Faddeev calculation by Golak et al [2] II.…”

Section: Introductionmentioning

confidence: 99%

“…are little affected by the explicit contribution of MEC's. On the other hand MEC's have to be calculated explicitly in the magnetic transitions, particularly M1 in which they may give contributions up to 50% [12]. Contributions of M1 and thus MEC's are particularly large at small and large reaction angles.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Vector and tensor analyzing powers of theH1(d→
Klechneva
¹
,
Carasco
²
,
Goussev
³

et al. 2006
Phys. Rev. C
Self Cite
5
1
0
0
View full text Add to dashboard Cite

Precise measurements of the deuteron vector analyzing power A d y and the tensor analyzing power Ayy of the 1 H( d, γ) 3 He-capture reaction have been performed at deuteron energies of 29 MeV and 45 MeV. The data have been compared to theoretical state-of-the-art calculations available today. Due to the large sensitivity of polarization observables and the precision of the data light could be shed on small effects present in the dynamics of the reaction.

show abstract

Section: Comparison To Theorymentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Vector and tensor analyzing powers of theH1(d→
Klechneva
¹
,
Carasco
²
,
Goussev
³

et al. 2006
Phys. Rev. C
Self Cite
5
1
0
0
View full text Add to dashboard Cite

show abstract

“…We examined the energy dependence of A yy (90 • ) and A zz (90 • ) by collecting experimental data below E d = 45 MeV [42][43][44][45]. Disagreement between experiment and 3NF calculation seemed to exist.…”

Section: Discussionmentioning

confidence: 99%

Experimental Investigations of Discrepancies in Three-Nucleon Reactions

Sagara

2010

Few-Body Syst

View full text Add to dashboard Cite

Experiments on pd scattering, pd capture and pd breakup performed by our Kyushu University group since 1988 are reviewed. Various discrepancies between the experimental results and 3N Faddeev calculations have been found, and systematical measurements of the discrepancies have been made. From discrepancies in pd scattering cross section and in 3N binding energy, 2π-exchange 3N force was determined, and the discrepancies were satisfactorily diminished. There are, however, still many discrepancies awaiting theoretical investigation, as described in this report. IntroductionA precise experimental study of three-nucleon (3N) reactions at Kyushu University Tandem Accelerator Laboratory (KUTL) was started in 1988. Before the 3N experiments, high-intensity polarized p-and d-beams had been already developed at KUTL to measure ( d, p) polarization transfer coefficients. These beams were used to obtain high-statistics 3N data. To obtain high-precision and reliable 3N data, experimental facilities were improved.Beam polarization and beam position on the target should be stable in order to obtain reliable data. Also beam intensity should be stable to correctly estimate counting efficiency of detectors. Beam polarization, integrated beam charge, and target thickness (gas pressure and length along the beam axis) should be accurately measured. To obtain high-statistic data, data acquisition speed should be fast enough to accumulate many counts with low counting loss. These requirements were not easily satisfied in a university laboratory.Our purpose for starting 3N experiments at that time was to find 3N forces and to solve A y puzzle. Numerical calculations of Faddeev equations were greatly developed in 1980's. Speeds of computers became faster every year. Koike and Heidenbauer pointed out presence of A y puzzle (1986) [1]. Faddeev calculations with realistic NN potentials instead of separable potentials were made first by Takemiya [2], then by Bochum group [3,4].We decided therefore, to obtain precise and systematic experimental data of 3N reactions. When the precise data were compared with reliable Faddeev calculations, shortage of 2N force (2NF) might appear as a discrepancy between the data and the calculations. The discrepancy might indicate effects of 3NF or other origins which we were looking for. If a discrepancy was confirmed, theoretical investigations would reveal its origin(s), which would be 3NF or others. On this thought, we started precise and systematic experiments on pd system at KUTL in 1988.By 2009 we have made many experiments on (a) pd scattering in a beam energy range of 2-18 MeV,

show abstract

“…3 He 1 g has been the focus of many experimental and theoretical studies over the past 20 years, and during this time experiments with polarized protons and deuterons have come to be fairly common. Initially, the interest in polarization experiments arose in part from the observation that the "tensor analyzing powers" for p-d capture are sensitive to D-state components in the 3 He wave function [1][2][3][4]. Additionally, it was known that measurements of the proton analyzing power and the deuteron vector analyzing power are sensitive to M1 transitions [5,6] which can be influenced by meson exchange processes and non-nucleonic degrees of freedom.…”

mentioning

confidence: 99%

Matrix Elements for Low-Energyp−dRadiative Capture

Smith

Knutson

1999

Phys. Rev. Lett.

View full text Add to dashboard Cite

show abstract

p- Radiative capture and the 3He D-state

Cited by 48 publications

References 19 publications

Vector and tensor analyzing powers of theH1(d→
Klechneva
¹
,
Carasco
²
,
Goussev
³

et al. 2006
Phys. Rev. C
Self Cite
5
1
0
0
View full text Add to dashboard Cite

Vector and tensor analyzing powers of theH1(d→
Klechneva
¹
,
Carasco
²
,
Goussev
³

et al. 2006
Phys. Rev. C
Self Cite
5
1
0
0
View full text Add to dashboard Cite

Experimental Investigations of Discrepancies in Three-Nucleon Reactions

Matrix Elements for Low-Energyp−dRadiative Capture

Contact Info

Product

Resources

About

p- Radiative capture and the 3He D-state

Cited by 48 publications

References 19 publications

Vector and tensor analyzing powers of theH1(d→Klechneva1, Carasco2, Goussev3 et al. 2006Phys. Rev. CSelf Cite5100View full textAdd to dashboardCite

Vector and tensor analyzing powers of theH1(d→Klechneva1, Carasco2, Goussev3 et al. 2006Phys. Rev. CSelf Cite5100View full textAdd to dashboardCite

Experimental Investigations of Discrepancies in Three-Nucleon Reactions

Matrix Elements for Low-Energyp−dRadiative Capture

Contact Info

Product

Resources

About

Vector and tensor analyzing powers of theH1(d→
Klechneva
¹
,
Carasco
²
,
Goussev
³

et al. 2006
Phys. Rev. C
Self Cite
5
1
0
0
View full text Add to dashboard Cite

Vector and tensor analyzing powers of theH1(d→
Klechneva
¹
,
Carasco
²
,
Goussev
³

et al. 2006
Phys. Rev. C
Self Cite
5
1
0
0
View full text Add to dashboard Cite