The Photodisintegration of the Deuteron with Polarized Photons from LEGS
Author:
Publisher:
Published: 1985
Total Pages: 35
ISBN-13:
DOWNLOAD EBOOKRead and Download eBook Full
Author:
Publisher:
Published: 1985
Total Pages: 35
ISBN-13:
DOWNLOAD EBOOKAuthor: R. Brockmann
Publisher:
Published: 1979
Total Pages: 28
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1985
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAn experiment is described which will measure the d(.gamma., p) reaction with polarized photon beams from LEGS ranging in energy from 50 MeV to 530 MeV. The data will yield a new high-resolution high-statistics determination of the total unpolarized cross section, will isolate for the first time the polarization dependent part of the reaction, and will measure the photon-beam asymmetry with much higher resolution and accuracy than available from existing data. These will provide one of the most stringent tests for models of the nuclear force. In addition, high-resolution data will be taken with both linear and circularly-polarized .gamma. rays to search for the effects of bibaryons.
Author: H. Arenhövel
Publisher: Springer Science & Business Media
Published: 2012-12-06
Total Pages: 189
ISBN-13: 3709167019
DOWNLOAD EBOOKMore than 50 years ago, in 1934, Chadwick and Goldhaber (ChG 34) published a paper entitled "A 'Nuclear Photo-effect': Disintegration of the Diplon by -y-Rays."l in the introduction: They noted "By analogy with the excitation and ionisation of atoms by light, one might expect that any complex nucleus should be excited or 'ionised', that is, disintegrated, by -y-rays of suitable energy", and furthermore: "Heavy hydrogen was chosen as the element first to be examined, because the diplon has a small mass defect and also because it is the simplest of all nuclear systems and its properties are as important in nuclear theory as the hydrogen is in atomic theory". Almost at the same time, in 1935, the first theoretical paper on the photodisinte gration of the deuteron entitled "Quantum theory of the diplon" by Bethe and Peierls (BeP 35) appeared. It is not without significance that these two papers mark the be ginning of photonuclear physics in general and emphasize in particular the special role the two-body system has played in nuclear physics since then and still plays. A steady flow of experimental and theoretical papers on deuteron photo disintegration and its inverse reaction, n-p capture, shows the continuing interest in this fundamental process (see fig. 1.1).
Author: F. F. Liu
Publisher:
Published: 1964
Total Pages: 9
ISBN-13:
DOWNLOAD EBOOKThe asymmetry in the photodisintegration of the deuteron by polarized photons has been measured between photon energies of 75 and 230 MeV. Measurements are made mostly at 90 degrees in the center of mass system, but limited data at 45 degrees and 135 degrees are also obtained. The data below 140 MeV are compared with current theories. At 90 degrees our results are generally smaller than theoretical calculations. The measured asymmetry changes sign at about 130 MeV and shows a backward peaking at the high energy points. (Author).
Author: Glen Pridham
Publisher:
Published: 2014
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1979
Total Pages: 26
ISBN-13:
DOWNLOAD EBOOKAuthor: K.-M. Schmitt
Publisher: Springer Science & Business Media
Published: 2012-12-06
Total Pages: 304
ISBN-13: 3709191912
DOWNLOAD EBOOKFor the first time, a complete calculation of all 288 polarization observables of deuteron photodisintegration for polarized photons and an oriented deuteron target is presented for energies below +-production threshold. The observables are calculated within a nonrelativistic framework but with inclusion of lowest-order relativistic effects. Explicit meson exchange currents and isobar configurations as manifestation of subnuclear degrees of freedom are included in the calculation. The sensitivity of the various polarization observables with respect to subnuclear degrees of freedom, to electric and magnetic multipole contributions and to a variety of realistic potential models are systematically investigated. Thus this atlas provides the most detailed and systematic survey on polarization observables of this important process. It allows to analyse the different dynamical properties of the np-system as contained in the various observables and, therefore, will be useful for both theoretical studies and for the planning and evaluation of experiments as well. It serves in addition as an important supplement to the recent general review on deuteron photodisintegration by A. Arenhövel and M. Sanzone (Few-Body Systems, Suppl. 3).
Author: Wendell Keith Mize
Publisher:
Published: 1992
Total Pages: 532
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 2007
Total Pages:
ISBN-13:
DOWNLOAD EBOOKWe measured the angular dependence of the three recoil-proton polarization components in two-body photodisintegration of the deuteron at a photon energy of 2 GeV. These new data provide a benchmark for calculations based on quantum chromodynamics. Two of the five existing models have made predictions of polarization observables. Both explain the longitudinal polarization transfer satisfactorily. Transverse polarizations are not well described, but suggest isovector dominance.