Final-state effects in neutron Compton scattering measurements on zirconium deuteride and beryllium

For x-ray scattering from amorphous media at large sin θ/λ (> 1.00 Å-1) momentum and energy is either imparted to a single electron (Compton effect) or to a single atom (Thermal Spike effect). In both cases the impulse approximation provides a convenient method for treating the scattering. Measurements of the ratio of Thermal Spike scattering to Compton scattering were made on paraffin.

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The resonant scattering of gamma radiation from lead isotopes

Canadian Journal of Physics ◽

10.1139/p78-134 ◽

1978 ◽

Vol 56 (8) ◽

pp. 1021-1036 ◽

Cited By ~ 8

Author(s):

J. W. Knowles ◽

A. M. Khan ◽

W. F. Mills

Keyword(s):

Gamma Radiation ◽

Compton Scattering ◽

Scattered Radiation ◽

Lead Isotopes ◽

Resonant Scattering ◽

Aluminum Plate ◽

Γ Radiation ◽

Energy Beam ◽

Scattering Measurements ◽

Variable Energy

The scattering of gamma radiation from different isotopic mixtures of lead has been measured between 4.7 and 8.3 MeV with a variable energy beam with 175 keV resolution obtained by Compton scattering (n,γ) radiation of nickel from a curved aluminum plate. The elastically scattered radiation was detected with a 12.5 cm diameter, 12.5 cm long NaI(Tl) and with 27 or 49 cm3 Ge(Li) detectors located at scattering angles of 135° and 90°, respectively. Relative scattering measurements from targets of natural lead, radio-lead, and lead enriched in 208Pb show that the most prominent peaks of natural lead are in 208Pb at 7332.6 ± 1.3, 7087.7 ± 4.6, 7064.4 ± 3.5, 6721.0 ± 1.8, 5507.6 ± 1.8, 5292.6 ± 3.3, 4836.5 ± 4.6 keV. Measurements of resonant scattering and resonant self-absorption of the more intense scattered radiations provide information on level widths.

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PARTONIC PICTURE OF GTMDS

International Journal of Modern Physics Conference Series ◽

10.1142/s201019451460009x ◽

2014 ◽

Vol 25 ◽

pp. 1460009 ◽

Cited By ~ 8

Author(s):

SIMONETTA LIUTI ◽

ABHA RAJAN ◽

AURORE COURTOY ◽

GARY R. GOLDSTEIN ◽

J. OSVALDO GONZALEZ HERNANDEZ

Keyword(s):

Angular Momentum ◽

Compton Scattering ◽

Orbital Angular Momentum ◽

Scattering Amplitude ◽

Final State Interaction ◽

Deeply Virtual Compton Scattering ◽

Virtual Compton Scattering ◽

Matrix Elements ◽

Final State ◽

Wigner Distributions

We argue that due to parity constraints, the helicity combination of the purely momentum space counterparts of the Wigner distributions — the generalized transverse momentum distributions — that describes the configuration of an unpolarized quark in a longitudinally polarized nucleon, can enter the deeply virtual Compton scattering amplitude only through matrix elements involving a final state interaction. The relevant matrix elements in turn involve light cone operators projections in the transverse direction, or they appear in the deeply virtual Compton scattering amplitude at twist three. Orbital angular momentum or the spin structure of the nucleon was a major reason for these various distributions and amplitudes to have been introduced. We show that twist three contributions to deeply virtual Compton scattering provide observables related to orbital angular momentum.

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