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YerPhI Proposal   (Site not responding. Last check: 2007-10-04) The study of deuteron photodisintegration processes as well as the process of quasideuteron photodisintegration on light nuclei are of significant importance for revealing the fundamental concepts of nuclear and elementary particle physics. Within the framework of deuteron photodisintegration GI-asymptotic amplitude model, based on the meson-hadron degrees of freedom (with possible contribution of nucleon resonances) - model GIAM [11,16], the dependence of cross section asymmetry (S) from Eg was calculated at the energy range Eg=1.0-3.0GeV fig. These estimates of background and further their experimental definition are important for the stud of the photodisintegration processes on the "quasideuteron", for which the kinematical range of angles expands due to "quasideuteron" fermi motion in the nucleus and its limits are not distinctly defined. www-atlas.yerphi.am /group/deu2.html   (3060 words)

piasetzky We therefore refer to the study of the hard pp photodisintegration reaction for future insight. photodisintegration cross section as a function of the photon energy. We propose a new generation of hard photodisintegration study to continue the deuteron extensive measurements. www.pit.physik.uni-tuebingen.de /grabmayr/CD-Pavia2003/piasetzky/piasetzky.html   (1987 words)

Publications of W. Sandhas Photodisintegration of He at Low Energies (with A. Casel), in: Proceedings of the Ninth International Conference on the Few Body Problem, Eugene, USA, 1980, p. Photodisintegration of the α-Particle: Integral Equation Approach (with S.A. Sofianos, H. Fiedeldey, and H. Haberzettl), in: Proceedings of the International Workshop on Microscopic Methods in Few-Body Systems Theory, Kalinin, USSR, 1988, p. Photodisintegration of He in the Integrodifferential Equation Approach (with S.A. Sofianos and H. Fiedeldey), Phys. www.th.physik.uni-bonn.de /th/People/sandhas/publications.html   (2231 words)

Deuteron Photodisintegration   (Site not responding. Last check: 2007-10-04) Because the cross section for photodisintegration of the deuteron is so small, the modification made is an approximation. Once a photodisintegration is triggered, the photon is propagated the distance to the interaction point, and an interaction vertex is placed in the data structure. When this vertex is acted upon, a centre of momentum scattering angle is calculated for the neutron relative to the incoming photon, along with neutron energy, and these are transformed into the lab frame. www-pnp.physics.ox.ac.uk /~west/sno/snoman_companion/user_manual/node397.html   (278 words)

rossi   (Site not responding. Last check: 2007-10-04) The study of electromagnetic interactions with few (two-three) nucleon systems at relatively high energy is a promising channel to investigate these questions, because it is possible to confront calculations based on first principles with precise data. The incident flux of photons on the target was evaluated from the number of electrons detected in the hodoscope multiplied by the tagging efficiency, i.e. This result can be considered a further indication that a pQCD interpretation of the deuteron photodisintegration process may not be adequate in the measured energy region and that a complete non perturbative theory is necessary. www.pv.infn.it /~2hconf/CDpavia/rossi/rossi.html   (2763 words)

Lifetimes of Nuclei in the r-Process   (Site not responding. Last check: 2007-10-04) Because of the comparatively long beta-decay lifetime (as compared to captures and photodisintegrations) the r-process nucleosynthesis is halted until a sufficient amount of these equilibrated nuclei has decayed. The lifetime for photodisintegration is given as a red line, the one for neutron capture by a green line, beta-decay lifetimes (taken from Möller, Nix, Kratz, At. Because capture and photodisintegration are related by detailed balance, changing one means changing the other by the same factor. quasar.physik.unibas.ch /tommy/astro/rproc/lifetimes.html   (1819 words)

EXPERIMENTAL NUCLEAR PHYSICS The primary goal of the photon scattering is to measure the electric and magnetic polarizabilities of both free and bound nucleons. The photodisintegration studies concentrate on precision measurements of the photodisintegration of light nuclei, such as deuterium. The deuteron photodisintegration is one of the most fundamental processes in all of nuclear physics and involves such questions as the form of the nuclear current operator, the role of relativity, and mesonic exchange currents. www.engr.uiuc.edu /Publications/engineering_research/1996/phys2/phys2-2.html   (834 words)

Hard Photodisintegration of a Proton Pair A series of high-energy, hard-photodisintegration experiments of the deuteron have been performed in order to study the dynamics of the transition from the hadronic to the quark-gluon description of the strong interaction [Nap88]. At present, it appears that hard photodisintegration is an intractable problem in meson-baryon theories, and that the quarks are the relevant degrees of freedom, but they cannot be described through perturbative QCD (pQCD). The goal of the experiment is to study new features predicted by [Bro03]: the main prediction, in contrast with low-energy observations, is that the pp breakup cross section is not much smaller than that for pn breakup. www.gwu.edu /~ndl/research6m.htm   (392 words)

nucl-ex/0502011--Direct determination of photodisintegration cross sections and the p-process | Physics Comments   (Site not responding. Last check: 2007-10-04) This is an excellent and concise review of experimental approaches to study low-energy photodisintegration cross sections with special emphasis on applications in Nuclear Astrophysics. It should be pointed out, however, that - despite of advanced experimental efforts - photodisintegration techniques can only probe a few of the gamma-transitions important for the calculation of astrophysical reaction rates. Therefore, they can be helpful to perform limited tests of theory but they will not be able to directly measure stellar photodisintegration rates. www.physcomments.org /node/192   (173 words)

INVESTIGATION of the photospallation mechanism of 1p-shell nuclei on three charged fragments   (Site not responding. Last check: 2007-10-04) On the other hand the discrepancy of different experimental results and their disparity with theoretical ones should be noted. It could be understood taking into account that only single charged particle was registered in experimental investigations of photodisintegration of nuclei, in particular lithium. So the immediate experimental investigation of multiparticle disintegrations is essential for the theoretical treatment of the photodisintegration of these nuclei. www.inr.ac.ru /~polonski/abstracts/kotikov.htm   (256 words)

Mkph-T-97-31 (ResearchIndex) Explicit pionic degrees of freedom in deuteron photodisintegration in the... Abstract: Introduction Photodisintegration of the deuteron in the \Delta-resonance region is particularly interesting in order to investigate the N \Delta-interaction. Among the most sophisticated approaches are the unitary three-body model of Tanabe and Ohta [2] and the coupled channel approach (CC) of Wilhelm and Arenhovel [3]. citeseer.ist.psu.edu /196258.html   (231 words)

Citebase - The photodisintegration of cosmic ray nuclei by solar photons: the Gerasimova-Zatsepin effect revisted The photodisintegration of cosmic ray nuclei by solar photons: the Gerasimova-Zatsepin effect revisted The interesting possibility of measuring the masses of high energy cosmic ray particles by observing pairs of extensive air showers arriving at the earth nearly simultaneously was proposed some years ago by Gerasimova and Zatsepin (1960). Such showers would be created by the nuclear fragments originating as a result of the photodisintegration of massive nuclei interacting with the solar radiation field. citebase.eprints.org /cgi-bin/citations?archiveID=oai:arXiv.org:astro-ph/9808033   (1137 words)

Low-energy photodisintegration of Be and Be reactions at astrophysical conditions Low-energy photodisintegration of Be and Be reactions at astrophysical conditions A semi-microscopic model for the low-energy photodisintegration of the Be nucleus is constructed, and the experimental data are analyzed with its help. www.edpsciences.org /articles/epja/abs/1998/04/epja055/epja055.html   (143 words)

Meson Retardation in Deuteron Photodisintegration Above (ResearchIndex) Abstract: Photodisintegration of the deuteron above ß-threshold is studied in a coupled channel approach including N \Delta- and ßd-channels with pion retardation in potentials and exchange currents. A much improved description of total and differential cross sections in the energy region between ß-threshold and 400-450 MeV is achieved. INTRODUCTION Despite its long history, photodisintegration of the deuteron is still a very intensely studied process. citeseer.ist.psu.edu /203383.html   (264 words)

[No title]   (Site not responding. Last check: 2007-10-04) Invited talk at the XL International Winter Meeting on Nuclear Physics, 21-26 January 2002 \\ The high energy two-body photodisintegration of the deuteron is an ideal reaction for the identification of quark effects in the nuclei. Preliminary results from the analysis of 30% of the total statistic accumulated is shown. These results are in good agreement with the available data, and are well described by the recent calculation of the deuteron photodisintegration cross section derived in the framework of the Quark Gluon String Model. www.thphys.uni-heidelberg.de /cgi-bin/abstracts/hep-ph:0206213   (179 words)

tomusiak Experimental data on the photodisintegration of the trinucleons has been available for a rather long time. In this talk I will outline their method and show results for what are in fact the first theoretical results for trinucleon photodisintegration using modern realistic potentials including a three-body force. He photodisintegration cross sections computed from the TN, MT potential models. www.pit.physik.uni-tuebingen.de /grabmayr/CDgranada/tomusiak/tomusiak.html   (1964 words)

LEGS Publications Measurements of Deuteron Photodisintegration with Linearly Polarized Photons in the {delta} Resonance Region", LEGS Collaboration, G. Blanpied et al., submitted to Phys. Multipole Analysis of the Photodisintegration of Deuterium in the Delta Resonance Region C. Deuteron Photodisintegration Results Phys Rev C 52, R455(1995) Data www.legs.bnl.gov /pub/pub.html   (276 words)

Citebase - Low-energy photodisintegration of 9Be and alpha + alpha + n <-> 9Be + gamma reactions at astrophysical ... Low-energy photodisintegration of 9Be and alpha + alpha + n A semi-microscopic model for the low-energy photodisintegration of the 9Be nucleus is constructed, and the experimental data are analyzed with its help. The astrophysical rates for the reaction alpha + alpha + n -> 9Be + gamma and the reverse photodisintegration of 9Be are calculated. citebase.eprints.org /cgi-bin/citations?archiveID=oai:arXiv.org:nucl-th/9802024   (1320 words)

Univeristy of Saskatchewan: Nuclear Physics Research When fully instrumented, it will be used for coincidence experiments in which the scattered electrons and outgoing hadrons are detected, opening a whole new research area at SAL. Photodisintegration studies, especially of the light nuclei, are an important effort to understand the nuclear force. Current efforts involve precision measurements of the deuteron photodisintegration cross section and studies of $^3He$,$ ^4He$, and $^{12}C$. physics.usask.ca /research/nuclear.htm   (1325 words)

Measurement of Proton Polarization in Deuteron Photodisintegration   (Site not responding. Last check: 2007-10-04) [C5.001] Measurement of Proton Polarization in Deuteron Photodisintegration Cross sections for deuteron photodisintegration near 90^\circ_cm show surprisingly good agreement with the predictions of quark counting rules, starting at very low energies, near 1 GeV. We have measured spin observables in deuteron photodisintegration at 90^\circ_cm for photon energies from about 0.5 to 2.5 GeV. flux.aps.org /meetings/YR00/APR00/abs/S640001.html   (171 words)

[No title] Works on the project "Measurement of the cross section asymmetry of deuteron and quasideuteron photodisintegration processes" and its presentation for receiving ISF grant. Deuteron Photodisintegration by Linearly Polarized Photons in the Energy Region Eg=0.3-1.0GeV.J.Phys.G: Nucl.Part.Phys. Study of Deuteron Photodisintegration by Linearly Polarized Photons in the Energy Range Eg=0.4-0.8GeV.- Sov. grabsky.home.cern.ch /grabsky/cvn.html   (1080 words)

pub DEUTERON PHOTODISINTEGRATION: NEW RESULTS FROM TJNAF, Invited talk presented at the International Conference on Physics since Parity Symmetry Breaking a conference in memory of Professor C.S. Wu, August, 1997 Nanjing, China. DEUTERON PHOTODISINTEGRATION: NEW RESULTS FROM TJNAF, Invited talk presented in the Nuclear Physics session at The Second Joint Meeting of the World-Wide Chinese Physicists in honor of Prof. Deuteron Photodisintegration: Preliminary Results from CEBAF, Plenary talk presented at the XIV International Conference on Particles and Nuclei, Williamsburg VA, 22-28 May, 1996. www2.lns.mit.edu /~haiyan/talks.html   (687 words)

Photodisintegration Event Selection   (Site not responding. Last check: 2007-10-04) I am beginning to develop event selection analysis for photodisintegration of the deuteron. In this reaction channel (which I am still trying to understand) we are in the limit of Q^{2}->0 (the photon is real) and thus the "scattered" electron goes down the beam pipe. Events where a Cerenkov detector fire are to be discarded (thus eliminating forward angle positrons), but this aids us little in the backward angle, as in the event shown below, where there are no Cerenkovs. einstein.unh.edu /~karpiusp/photodisMAIN.htm   (271 words)

Glasgow ePrints Service - Experimental test of virtual photon theory via electrodisintegration and photodisintegration ... Experimental test of virtual photon theory via electrodisintegration and photodisintegration of the deuteron Yuly, M. and Mittelstaedt, J. and Matthews, J.L. and Kinney, E.R. and Maher, C. and Sapp, W.W. and Soos, T. and Owens, R.O. (2003) Experimental test of virtual photon theory via electrodisintegration and photodisintegration of the deuteron. From these results, cross sections for the d(gamma,p)n reaction have been extracted using VPT, and are compared with d(gamma,p)n cross sections measured concurrently using a bremsstrahlung beam. eprints.gla.ac.uk /archive/00001861   (188 words)

FIND A NAPOLITANO,J (HEP-SPIRES-SLAC) Two body photodisintegration of the deuteron up to 2.8-GeV. Two body photodisintegration of the deuteron at forward angles between 1-GeV and 3-GeV. Measurement of two body deuteron photodisintegration at high photon energies and Theta(CM) = 90-degrees. www.rpi.edu /~napolj/Papers/jnSPIRES.html   (1113 words)

[No title]   (Site not responding. Last check: 2007-10-04) Low-energy photodisintegration of nuclei in the range A=4-7. The results of Faddeev calculations for two- and three-body 3He and 3H photodisintegration will be presented. In these calculations the AV18 nucleon-nucleon interaction and Urbana IX 3N force have been applied. www.maxlab.lu.se /kfoto/UserAssociation/Program.html   (738 words)

Photodisintegration of the Deuteron; Author: Arenhovel, H. (University of Mainz, Germany); Author: Sanzone, M. ...   (Site not responding. Last check: 2007-10-04) Photodisintegration of the Deuteron; Author: Arenhovel, H. (University of Mainz, Germany); Author: Sanzone, M. (University of Geneva, Switzerland); Hardback; Book This study provides a review of the theoretical approaches employed to evaluate two-body photodisintegration of the deuteron at low and intermediate energies. Prices subject to change to be advised on confirmation of order. www.netstoreusa.com /sabooks/321/3211822763.shtml   (189 words)

Glasgow ePrints Service - Complete angular distribution measurements of two-body deuteron photodisintegration between ... Complete angular distribution measurements of two-body deuteron photodisintegration between 0.5 and 3 GeV Nearly complete angular distributions of the two-body deuteron photodisintegration differential cross section have been measured using the CEBAF Large Acceptance Spectrometer detector and the tagged photon beam at the Thomas Jefferson National Accelerator Facility. The data show a persistent forward- backward angle asymmetry over the explored energy range, and are well described by the nonperturbative quark gluon string model. eprints.gla.ac.uk /archive/00001945   (125 words)

List of Publications   (Site not responding. Last check: 2007-10-04) M. Rustgi, A. Kassaee and L. Pandey, Photodisintegration of the deuteron with the elliptically polarized gamma rays, Physical Review C 35, 1242 (1987). M. Rustgi, A. Kassaee and L. Pandey, Photodisintegration of deuteron at low energies: Isolation of electric and magnetic contributions, Physical Review C 35, 841 (1987). L. Pandey and M. Rustgi, Relativistic effects and deuteron photodisintegration with polarized and unpolarized gamma rays, Physical Review C 32, 1842 (1985). frp.aysps.gsu.edu /lakshmi/list4.html   (447 words)

Publikationen 1999 Arenhövel: Absolute total cross sections for deuteron photodisintegration between 7 and 19 MeV. Ziegler: Photodisintegration of the deuteron by linearly polarized photons. Ziegler: Forward photodisintegration of the deuteron between 20 and 100 MeV photon energy. www.mpch-mainz.mpg.de /mpg/deutsch/92.html   (4270 words)

Publications   (Site not responding. Last check: 2007-10-04) o Onset of asymptotic scaling in deuteron photodisintegration, P. Rossi, et. o Complete Angular Distribution Measurements of Two-Body Deuteron Photodisintegration between 0.5 and 3 GeV, M. Mirazita, et. Measurements of Deuteron Photodisintegration up to 4.0 GeV, C. www2.latech.edu /~tforest/resume/publications.html   (400 words)

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