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We first investigate how the mass operator for symmetric and uncharged nuclear matter is modified in the presence of a Coulomb field and of neutron excess. Detailed calculations are performed with Reid's hard-core nucleon-nucleon interaction. They are carried out in the framework of the...
The Rh 103 , Pd 1 0 6 , 1 0 8 , and Ag 1 0 7 , 1 0 9 ( t , p ) reactions have been studied at a bombarding energy of 17 MeV. Excitation energies and enhancement factors were obtained for a number of levels up to about 2.5 MeV excitation in the residual nuclei. The L = 0 transitions observed...
The spectrum of Pb 205 is studied with the Pb 204 ( d , p ) transfer reaction at incident energies of 13.0 and 20.0 MeV. Angular distributions are obtained for 15 of the known single-hole fragments in Pb 205 below an excitation energy of 2.56 MeV. Spectroscopic strengths are extracted and these...
Nonsingular integral equations are derived for a class of multichannel scattering problems. NUCLEAR REACTIONS Scattering theory, integral equations for multi-channel scattering.
Cross sections for 1 f 7 2 neutron- and proton-transfer reactions on Ca 48 have been measured. A distorted-wave Born approximation analysis of these and other similar results for a Ca 40 target reveals isotope shifts of the 1 f 7 2 rms radii which are about 0.2 fm in magnitude and have opposite...
Ratios of pion-induced nucleon knockout cross sections are discussed utilizing a modified nucleon charge exchange model which takes into account nuclear structure effects on the effective number of nucleons and on the various probabilities for charge exchange. The availability of particle-stable...
A method is developed for clearly distinguishing experimentally between ( p , 2 p ) reactions which result from ( p , p ′ ) reactions followed by proton boiloff, and those in which the two protons are both emitted within ∼ 10 - 22 sec in a direct reaction (referred to as "double direct")....
The Sn 1 1 7 , 1 1 8 , 1 1 9 , 1 2 0 , 1 2 2 , 1 2 4 ( p , n ) cross sections were measured with ∼ 100-keV resolution for 2.6- to 7-MeV protons with systematic uncertainties of less than ± 1%. An exact sequence of broad maxima in the strength functions is observed with the energies at the...
The relative isotopic abundances of five isotopes of cadmium (111, 112, 113, 114, and 116) and eight isotopes of tin (117, 118, 119, 120, 21, 122, 124, and 126) have been measured in the thermal neutron fission of U 235 and Pu 239 . Samples of U 235 and Pu 239 were irradiated in a reactor; the...
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