Electro excitations of 9Be using large-basis shell model wavefunctions with higher energy configurations

• Published in: Journal of physics. G, Nuclear and particle physics Vol. 36; no. 10; pp. 105102 - 105102 (9)
• Main Authors: Radhi, R A, Adeeb, N M, Hashim, A K
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.10.2009; Institute of Physics
• Subjects: Exact sciences and technology; Nuclear physics; Physics; The physics of elementary particles and fields; Shell models; Electron scattering; Inelastic scattering; Wave functions; Orbits; Matrix elements; Particle excitation; Mathematical physics; Nuclear physics
• ISSN: 0954-3899; 1361-6471
• DOI: 10.1088/0954-3899/36/10/105102

Elastic and inelastic electron scattering from 9Be have been analyzed using large-basis shell model calculations. All major shells s, p, sd and pf are considered. The calculations are performed with truncated space, with configurations up to 2omega. Such calculations fail to describe the electron scattering data without normalizing the matrix elements with effective charges. Instead of using constant effective charges, one particle-one hole excitations are taken into account from all the major shell orbits into all higher allowed orbits with excitations up to 10omega. Excitations up to 6omega seem to be large enough for sufficient convergence. These excitations are essential in obtaining a reasonable description of the data. Calculations are presented for the transitions from JpiT = 3/2-1/2 to JpiT = 3/2-1/2, 5/2-1/2 and 7/2-1/2.