Published September 14, 1990 | Version v1
Miscellaneous Open

Study of longitudinal and transverse response functions in the inclusive inelastic scattering on the 4He nucleus

Creators

Description

This research thesis presents the results of a study of cross sections of inelastic scattering of electrons on the 4He nucleus. This measurement has been performed for incident energies between 150 and 640 MeV and for different scattering angles (34, 60, 75, 90 and 135 degrees). The quasi-elastic area is totally encompassed by this measurement. The cross section is separated into two transverse and longitudinal response functions by using the Rosenbluth diagram method, and by deconvolution of radiative effects in the region of transferred momentum between 300 and 640 MeV/c and of transferred energy reaching 380 MeV. Experimental results are compared with theoretical results. It appears that the transverse response function is underestimated by the calculation. Explanations are proposed. On the contrary, the longitudinal response function is overestimated by the calculation: this means that nucleon-nucleon correlations within the nucleus are not properly taken into account

Abstract (French)

Cette these presente les resultats de l'etude des sections efficaces de diffusion inelastique d'electrons sur le noyau d'4He. Cette mesure a ete effectuee pour des energies incidentes allant de 150 a 640 MeV pour les angles de diffusion suivant: 34 deg., 60 deg., 75 deg., 90 deg. et 145 deg. La region quasi-elastique a ete couverte entierement par cette mesure. Nous avons separe la section efficace en deux fonctions de reponse transverse et longitudinale par la methode du diagramme de Rosenbluth en la deconvoluant des effets radiatifs, dans la region de moment transfere entre 300 et 640 MeV/c et d'energie transferee atteignant 380 MeV. Les resultats obtenus sont compares a un calcul theorique prenant en compte les interactions dans l'etat final, ainsi que les courants d'echange mesiques. La fonction de reponse transverse est sous-estime par le calcul. Le desaccord observe au-dela du sommet du quasi-elastique pourrait etre du a la contribution du canal ppnn ainsi qu'aux effets a plusieurs nucleons dans le processus d'electroproduction de pions qui n'ont pas ete pris en compte dans le calcul. La fonction de reponse longitudinale est surestimee par le calcul, montrant ainsi que les correlations nucleon-nucleon dans le noyau ne sont pas correctement prises en compte. (auteur)

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Additional details

Additional titles

Original title (French)
Etude des fonctions de reponse longitudinale et transverse dans la diffusion inelastique inclusive sur le noyau d'4He

Identifiers

URL
http://www.iaea.org/inis/Contacts/;

Publishing Information

Imprint Pagination
105 p.
Report number
FRCEA-TH--6327

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
46094780
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
Resource subtype / Literary indicator
Thesis, Numerical Data
Descriptors DEI
BORN APPROXIMATION; COMPARATIVE EVALUATIONS; CORRELATIONS; CROSS SECTIONS; ELECTRON DIFFRACTION; EXPERIMENTAL DATA; HELIUM 4; HELIUM 4 TARGET; INCIDENCE ANGLE; INELASTIC SCATTERING; LONGITUDINAL MOMENTUM; RESPONSE FUNCTIONS; ROSENBLUTH FORMULA; TRANSVERSE MOMENTUM
Descriptors DEC
APPROXIMATIONS; CALCULATION METHODS; COHERENT SCATTERING; DATA; DIFFRACTION; EVALUATION; EVEN-EVEN NUCLEI; FUNCTIONS; HELIUM ISOTOPES; INFORMATION; ISOTOPES; LIGHT NUCLEI; LINEAR MOMENTUM; NUCLEI; NUMERICAL DATA; SCATTERING; STABLE ISOTOPES; TARGETS

Optional Information

Notes
54 refs.; Available from the INIS Liaison Officer for France, see the 'INIS contacts' section of the INIS website for current contact and E-mail addresses: http://www.iaea.org/inis/Contacts/