Abstract
The current status of thermodynamic models as applied to nuclear level densities is reviewed. Considerable refinement has taken place during the last fifteen years, with the result that some of the undesirable assumptions originally required by the model are no longer necessary. Some problems remain, however, particularly in calculating level densities for deformed nuclei. Furthermore, some related parameters, such as the positive-parity negative-parity ratio for levels and the spin cutoff parameter are more sensitive to the presence of two-body interactions than the total level density. Improvement in our characterization of nuclear level densities will require use of techniques which can incorporate the effects of two-body interactions in the level density calculation.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
H. A. Bethe, Phys. Rev. 50, 332 (1936); Rev. Mod. Phys. 9, 69 (1937).
N. Rosenzweig, Phys. Rev. 105, 950 (1957); Phys. Rev. 108, 817 (1957).
P. B. Kahn and N. Rosenzweig, Phys. Lett. 22, 307 (1966).
P. B. Kahn and N. Rosenzweig, Phys. Rev. 187, 1193 (1969).
E. Gadioli, I. lori, N. Molho, and L. Zetta, Nucl. Phys. A138, 321 (1969).
P. B. Kahn and N. Rosenzweig, J. Math Physics 10, 707 (1969).
H. Baba, Nucl. Phys. A159, 625 (1970).
J. Bardeen, L. N. Cooper, and J. R. Schrieffer, Phys. Rev. 108, 1175 (1957).
M. Sano and S. Yamasaki, Prog. Theo. Phys. 29, 397 (1963).
H. K. Vonach, R. Vandenbosch, and J. R. Huizenga, Nucl. Phys. 60, 70 (1964).
D. W. Lang, Nucl. Phys. 42, 353 (1963).
P. Decowski, W. Grochulski, A. Marcinkowski, K. Siwek, and Z. Wilhelmi, Nucl. Phys. A110, 129 (1968).
L. G. Moretto, Nucl. Phys. A182, 641 (1972).
L. G. Moretto, Nucl. Phys. A185, 145 (1972).
A. N. Behkami and J. R. Huizenga, Nucl. Phys. A217, 78 (1973).
S. M. Grimes, J. D. Anderson, J. W. McClure, B. A. Pohl and C. Wong, Phys. Rev. C10, 2373 (1974).
J. R. Huizenga and L. G. Moretto, Ann. Rev. Nucl. Sci. 22, 427 (1972).
We follow the usual convention, which defines a level density as including all (2J + 1) degenerate states (different JZ values) only with a combined weight of 1, while the state density includes each of the (2J + 1) states individually (total weight 2J + 1).
A. Gilbert and A. G. W. Cameron, Can. J. Phys. 43, 1446 (1965).
E. Gadioli and L. Zetta, Phys. Rev. 167, 1016 (1968).
W. Dilg, W. Schantl, H. Vonach, and M. Uhl, Nucl. Phys. A217, 269 (1973).
M. Beckerman, Nucl. Phys. A278, 333 (1977), Phys. Lett. 68B, 389 (1977).
J. R. Huizenga and A. A. Katsanos, Nucl. Phys. A98, 614 (1967).
V. F. Weisskopf and D. H. Ewing, Phys. Rev. 57, 672 (1940).
W. Hauser and H. Feshbach, Phys. Rev. 87, 366 (1952); L. Wolfenstein, Phys. Rev. 82, 690 (1951).
C. C. Lu, L. C. Vaz and J. R. Huizenga, Nucl. Phys. A190, 229 (1972).
S. G. Nilsson, K. Dan. Vid. Selsk. Mat-Fys. Medd. 23, No. 16 (1955).
P. Seeger and R. C. Perisho, Los Alamos Scientific Laboratory Report No. LA-3751 (1967).
J. R. Huizenga, A. M. Behkami, R. W. Atcher, J. S. Sventek, H. C. Britt, and H. Freiesleben, Nucl. Phys. A223, 589 (1974).
L. G. Moretto, Nucl. Phys. A182, 641 (1972).
J. D. Moses, H. W. Newson, E. G. Bilpuch and G. E. Mitchell, Nucl. Phys. A175, 556 (1971).
S. M. Grimes, unpublished.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1980 Plenum Press, New York
About this chapter
Cite this chapter
Grimes, S.M. (1980). Limits Of Thermodynamic Models for Nuclear Level Densities. In: Dalton, B.J., Grimes, S.M., Vary, J.P., Williams, S.A. (eds) Theory and Applications of Moment Methods in Many-Fermion Systems. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-3120-9_2
Download citation
DOI: https://doi.org/10.1007/978-1-4613-3120-9_2
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4613-3122-3
Online ISBN: 978-1-4613-3120-9
eBook Packages: Springer Book Archive