C. C. Blatchley

Longitudinal response functions for 40Ca from quasi-elastic electron scattering

Abstract Longitudinal response functions were extracted from quasi-elastic electron scattering data on 40 Ca at angles of 45.5°, 90°, and 140° with bombarding energies ranging from 130 to 840 MeV and for constant three-momentum transfers of 300, 330, 370, 410 and 450 MeV/ c . Contrary to previously reported results, the present longitudinal response functions show no more than 20% missing strength when compared to the relativistic Fermi gas model. Calculations employing wavefunctions generated from a relativistic Hartree potential and using an effective momentum approximation yield results that are in much closer agreement with the experimental data and indicate essentially no longitudinal suppression.

Anomalous track development in CR-39: Effects of gamma irradiation☆

Abstract CR-39 solid state track recorder material was exposed to doses of gamma irradiation ranging up to 3.9 megarad to determine the effects of background radiation on bulk etch rate and track development. At doses as low as 1 MR development of tracks from alpha particles was markedly affected by the background. Nonlinear response of the material began at irradiation levels below 3 MR, which is a much lower level than the onset of comparable effects in lexan or cellulose nitrate.

Quasielastic electron scattering from {sup 40}Ca

Differential cross sections for quasielastic electron scattering on {sup 40}Ca have been measured at laboratory scattering angles of 45.5{degree}, 90{degree}, and 140{degree} with bombarding energies ranging from 130 to 840 MeV. Transverse and longitudinal response functions have been extracted for momentum transfers from 300 to 500 MeV/c. Contrary to some previously reported results, the total observed longitudinal strength agrees with the relativistic Fermi gas prediction to within {plus_minus}18{percent}. {copyright} {ital 1997} {ital The American Physical Society}

Quasielastic electron scattering from40Ca

Differential cross sections for quasielastic electron scattering on {sup 40}Ca have been measured at laboratory scattering angles of 45.5{degree}, 90{degree}, and 140{degree} with bombarding energies ranging from 130 to 840 MeV. Transverse and longitudinal response functions have been extracted for momentum transfers from 300 to 500 MeV/c. Contrary to some previously reported results, the total observed longitudinal strength agrees with the relativistic Fermi gas prediction to within {plus_minus}18{percent}. {copyright} {ital 1997} {ital The American Physical Society}

Quasielastic electron scattering from [Formula Presented]Ca

Differential cross sections for quasielastic electron scattering on {sup 40}Ca have been measured at laboratory scattering angles of 45.5{degree}, 90{degree}, and 140{degree} with bombarding energies ranging from 130 to 840 MeV. Transverse and longitudinal response functions have been extracted for momentum transfers from 300 to 500 MeV/c. Contrary to some previously reported results, the total observed longitudinal strength agrees with the relativistic Fermi gas prediction to within {plus_minus}18{percent}. {copyright} {ital 1997} {ital The American Physical Society}

Quasi-elastic electron scattering fromU238

Rosenbluth separations of electron scattering response functions for uranium targets were made with data using measurements from five laboratory angles (60/sup 0/, 90/sup 0/, 134.5/sup 0/, 140/sup 0/, and 160/sup 0/) at three-momentum transfers ranging from 280 to 500 MeV/c. The separations were made to determine if previously reported quenching of the longitudinal response function persisted in targets with large atomic number. The results are compared to relativistic Fermi gas calculations and calculations following the formalism of Rosenfelder. The measured transverse response functions agree quite well with the Rosenfelder-type calculations and almost as well with the relativistic Fermi gas calculations. The measured longitudinal response functions show significant quenching at low q. This quenching diminishes with increasing q but is never quite overcome.

Quasi-elastic electron scattering from /sup 238/U

Rosenbluth separations of electron scattering response functions for uranium targets were made with data using measurements from five laboratory angles (60/sup 0/, 90/sup 0/, 134.5/sup 0/, 140/sup 0/, and 160/sup 0/) at three-momentum transfers ranging from 280 to 500 MeV/c. The separations were made to determine if previously reported quenching of the longitudinal response function persisted in targets with large atomic number. The results are compared to relativistic Fermi gas calculations and calculations following the formalism of Rosenfelder. The measured transverse response functions agree quite well with the Rosenfelder-type calculations and almost as well with the relativistic Fermi gas calculations. The measured longitudinal response functions show significant quenching at low q. This quenching diminishes with increasing q but is never quite overcome.

Quasi-elastic electron scattering from U 238

Rosenbluth separations of electron scattering response functions for uranium targets were made with data using measurements from five laboratory angles (60/sup 0/, 90/sup 0/, 134.5/sup 0/, 140/sup 0/, and 160/sup 0/) at three-momentum transfers ranging from 280 to 500 MeV/c. The separations were made to determine if previously reported quenching of the longitudinal response function persisted in targets with large atomic number. The results are compared to relativistic Fermi gas calculations and calculations following the formalism of Rosenfelder. The measured transverse response functions agree quite well with the Rosenfelder-type calculations and almost as well with the relativistic Fermi gas calculations. The measured longitudinal response functions show significant quenching at low q. This quenching diminishes with increasing q but is never quite overcome.