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The Thickness Distortion of Fe 57 Backscatter Mossbauer Spectra

Description: The thickness distortion of a backscatter 14.41 keV {gamma}-ray Mossbauer spectrum is calculated for the case of isotropic {gamma}-ray re-emission in the absorber, and a method of extracting the true absorber material resonant scattering cross section from experimental data is suggested and demonstrated. Some other features of backscatter and transmission Fe{sup 57} Mossbauer spectra are compared.
Date: August 1, 1980
Creator: Fultz, B. & Morris, J. W., Jr.
Partner: UNT Libraries Government Documents Department
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ANALYZING POWERS OF {sup 3}He({vector p},p){sup 3}He ELASTIC SCATTERING BETWEEN 30 AND 50 MeV

Description: Analyzing power data have been obtained for {sup 3}He({vector p},p){sup 3}He elastic scattering at seven energies between 30 and 50 MeV at laboratory angles between 20° and 160°. Errors are typically less than 0.01. These results supplement earlier differential and total reaction cross-section and analyzing power data and new data obtained with a polarised {sup 3}He target.
Date: June 1, 1980
Creator: Birchall, J.; Oers, W.T.H. van; Conzett, H.E.; Rossen, P. von; Larimer, R.M.; Larimer, R.M. et al.
Partner: UNT Libraries Government Documents Department
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THE DISASSEMBLY OF NUCLEAR MATTER

Description: A statistical model is applied for multi-fragment final states in nuclear collisions with bombarding energies E/A ≈ 100 MeV. A portion of the intermediate system formed is assumed to decay according to the available classical non-relativistic phase space, calculated in a grand canonical ensemble. The model correlates and predicts many experimental observables in terms of three parameters: the available energy per nucleon, the isospin asymmetry, and the effective interaction volume.
Date: August 1, 1980
Creator: Randrup, J. & Koonin, S.E.
Partner: UNT Libraries Government Documents Department
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GFMC calculations of electromagnetic moments and M1 transitions in A {<=} 9 nuclei

Description: We present recent Green’s function Monte Carlo calculations of magnetic moments and M1 transitions in A{<=}#20;9 nuclei, which include corrections arising from two-body meson-exchange electromagnetic currents. Two-body effects provide significant corrections to the calculated observables, bringing them in excellent agreement with the experimental data. In particular, we find that two body corrections are especially large in the A = 9, T = 3/2 systems, in which they account for up to ~#24; 20… more
Date: August 1, 2013
Creator: Pastore, Saori; Pieper, Steven C.; Schiavilla, Rocco & Wiringa, Robert Bruce
Partner: UNT Libraries Government Documents Department
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Neutron Emission in Relativistic Nuclear Collisions

Description: Previously reported differences between the measured proton and neutron energy spectra for the reaction ~400 MeV/nucleon {sup 20}Ne + U {yields} p, n + x are discussed. A parameter-free cascade-coalescence model of heavy ion collisions is shown to account for these differences. Such measurerrents are shown to be sensitive to the degree of projectile-target equilibration in relativistic nuclear collisions.
Date: December 1980
Creator: Stevenson, J. D.
Partner: UNT Libraries Government Documents Department
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Polarized {sup 3}He(e,e'n) Asymmetries in Three Orthogonal Measurements

Description: Asymmetry measurements were conducted in Jefferson Lab's experimental Hall A through electron scattering from a polarized {sup 3}He target in the quasi-elastic polarized-{sup 3}He(e,e'n) reaction. Measurements were made with the target polarized in the longitudinal direction with respect to the incoming electrons A_L, in a transverse direction that was orthogonal to the beam-line and parallel to the q-vector A_T, and in a vertical direction that was orthogonal to both the beam-line and the q-ve… more
Date: September 1, 2012
Creator: Long, Elena
Partner: UNT Libraries Government Documents Department
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Photodisintegration of Light Nuclei with CLAS

Description: We report preliminary results of photodisintegration of deuteron and {sup 3}He measured with CLAS at Jefferson Lab. We have extracted the beam-spin asymmetry for the {vector {gamma}}d {yields} pn reaction at photon energies from 1.1 GeV to 2.3 GeV and proton center-of-mass (c.m.) angles between 35{degrees}#14; and 135{degrees}#14;. Our data show interesting evolution of the angular dependence of the observable as the photon energy increases. The energy dependence of the beam-spin asymmetry at 9… more
Date: August 1, 2013
Creator: Ilieva, Yordanka Yordanova & Zachariou, Nicholas
Partner: UNT Libraries Government Documents Department
open access

ONE- AND TWO-PROTON INCLUSIVE SPECTRA IN 800 MeV PROTON-NUCLEUS COLLISIONS AND THE MEAN FREE PATH OF PROTONS IN NUCLEI

Description: One- and two-proton inclusive spectra have been measured in collisions of 800 MeV protons with C, NaF, KCl, Cu, and Pb targets. The single proton inclusive yield increases monotonically with target mass, while the two-proton yield at {theta}{sub Lab}=± 40° associated with pp quasi-elastic scatterings shows a maximum at a mass number of about 50. A model calculation reproduces the observed target mass dependence with a mean free path of ~2.5 fm for 800 MeV protons inside the nucleus.
Date: October 1, 1980
Creator: Tanihata, I.; Nagamiya, S.; Schnetzer, S. & Steiner, H.
Partner: UNT Libraries Government Documents Department
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