Publications (12)0 Total impact
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ABSTRACT: The evidence for a useful proportionality relationship between 0° (p, n) cross sections and the corresponding Gamow-Teller and Fermi beta-decay transition strengths is examined in detail. A simple parameterization for small momentum transfer L = 0 transitions is developed and used in the analysis of (p, n) data in the bombarding energy range 120–200 MeV. The parameterization describes the (p, n) differential cross section in terms of momentum transfer, energy loss, mass number, and bombarding energy and provides a straightforward way of extrapolating to zero momentum transfer. It is found that a single proportionality constant can serve to relate all Gamow-Teller transitions originating from the same target nucleus. The target dependence of this proportionality constant, however, is found to be unpredictable at the 20%–50% level, even within isotopic chains. Such large variations cannot be easily explained in the context of the standard single-step direct-reaction distorted-waves impulse approximation model.
Nuclear Physics A.
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ABSTRACT: Angular distributions for the ground-state (ΔJr=1+) and 0.96-MeV (ΔJπ=2+) transitions in the 12C(p,n)12N reaction have been measured at incident energies of 120, 160, and 200 MeV. The measured values of the differential cross section align themselves into smooth curves independent of incident energy when converted into plane-wave cross section values and plotted versus momentum transfer. This information supports the hypothesis that the spinisospin term of the effective interaction is almost energy independent in this energy region. Microscopic distortedwave impulse approximation calculations are presented.[NUCLEAR REACTIONS 12C(p,n)12N, E=120,160,200 MeV; measured neutron spectra at several angles between θ=0∘ and θ=30∘; extracted σ(E,θ) to g.s. and 0.96-MeV states of 12N. Compared angular distributions with microscopic calculations. Deduced plane-wave cross sections versus momentum transfer.]
Phys. Rev. C. 24(2).
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J. Rapaport,
D. Wang,
J. A. Carr,
F. Petrovich,
C. C. Foster,
C. D. Goodman,
C. Gaarde,
J. Larsen,
C. A. Goulding,
T. N. Taddeucci, D. Horen,
E. Sugarbaker
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ABSTRACT: Differential cross sections and analyzing powers for the (p→,n) reaction on carbon isotopes have been measured for angles up to θlab=50° using 160 MeV protons. The angular distributions for the stronger transitions are compared with the results of distorted-wave impulse approximation calculations which utilize transition densities from existing shell model calculations. The total observed Gamow-Teller strength is also compared with the shell model predictions. In addition, the shapes of these angular distributions are discussed emphasizing decomposition into longitudinal, transverse, and non-normal-parity-transfer components. Some comparisons of the present (p,n) data with corresponding (p,p’) data and with other relevant (p,n) data are also made.
Phys. Rev. C. 36(2).
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B Anderson,
D. Bainum,
A. Baldwin,
C. Foster,
A.I. Galonsky,
C.D. Goodman,
C. Goulding, D. Horen,
J. Knudson,
D. Lind,
R. Madey,
J. Rapaport,
G.R. Satchler,
S.D. Schery,
G. Walker,
J Watson,
T. Witten,
C. Zafiratos
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ABSTRACT: This work was supported by National Science Foundation Grants PHY 76-84033A01, PHY 78-22774, and Indiana University
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J. Rapaport,
T. Taddeucci,
C.D. Goodman,
C.C. Foster,
C.A. Goulding,
E. Sugarbaker,
D.E. Bainum,
T.G. Masterson,
D. Lind,
C. Gaarde, D. Horen
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ABSTRACT: This work was supported by the National Science Foundation Grant NSF PHY 78-22774 A02 & A03 and by Indiana University
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E. Sugarbaker,
P. Koncz,
D Krofcheck,
C.D. Goodman,
C.C. Foster,
J. Rapaport,
T.N. Taddeucci,
P. Welch,
S. Austin,
A. Galonsky,
C. Gaarde,
J. Larsen, D. Horen,
T. Masterson
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ABSTRACT: This work was supported by the National Science Foundation Grants NSF PHY 78-22774 A03, NSF PHY 81-14339, and by Indiana University
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J.N. Bahcall,
J. Rapaport,
T.N. Taddeucci,
E. Sugarbaker,
C.D. Goodman,
C.C. Foster, D. Horen,
C. Gaarde,
J. Larsen,
T. Masterson,
S. Austin
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ABSTRACT: This work was supported by the National Science Foundation Grant NSF PHY 78-22774 A02 & A03 and by Indiana University
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D Krofcheck,
E. Sugarbaker,
A.J. Wagner,
J. Rapaport,
D Wang,
J.N. Bahcall,
R.C. Byrd,
C.C. Foster,
C.D. Goodman,
W Huang,
I.J. van Heerden,
T. Carey,
T.N. Taddeucci, D. Horen,
J.S. Larsen,
C. Gaarde
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J. Rapaport,
D Wang,
J.A. Carr,
F. Petrovich,
C. Foster,
C.D. Goodman,
C. Gaarde,
J. Larsen,
C.A. Goulding,
T.N. Taddeucci, D. Horen,
E. Sugarbaker
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