Gamow-Teller strength distributions in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>fp</mi></math></span>-shell nuclei

P. B. Radha; D. J. Dean; S. E. Koonin; K. Langanke; P. Vogel

doi:10.1103/PhysRevC.56.3079

Gamow-Teller strength distributions in $fp$ -shell nuclei

P. B. Radha, D. J. Dean, S. E. Koonin, K. Langanke, and P. Vogel

Phys. Rev. C 56, 3079 – Published 1 December 1997

Abstract

We use the shell model Monte Carlo method to calculate complete $0 f 1 p$ -shell response functions for Gamow-Teller (GT) operators and obtain the corresponding strength distributions using a maximum entropy technique. The approach is validated against direct diagonalization for $^{48}$ Ti. Calculated GT strength distributions agree well with data from $(n, p)$ and $(p, n)$ reactions for nuclei with $A = 48$ –64. We also calculate the temperature evolution of the GT $_{+}$ distributions for representative nuclei and find that the GT $_{+}$ distributions broaden and the centroids shift to lower energies with increasing temperature.

Received 29 July 1997

DOI:https://doi.org/10.1103/PhysRevC.56.3079

Authors & Affiliations

P. B. Radha¹, D. J. Dean², S. E. Koonin¹, K. Langanke³, and P. Vogel⁴

¹W. K. Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125
²Physics Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37381
³Institut for Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark
⁴Division of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, California 91125

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Vol. 56, Iss. 6 — December 1997

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Physical Review C

covering nuclear physics