Summary
The neutron radiative capture cross-sections in the MeV region for nuclei with neutron number 40 ≤N ≤ 90 are examined on the basis of the statistical model. An energy-dependence of the level density like\(\varrho (\bar U) \propto (A(\bar U + t))^{ - 2} exp [2(a\bar U)^{\tfrac{1}{2}} ]\) is assumed. The a-values obtained from the analysis are compared with those given by the analysis of the level density at binding excitation energy.
Riassunto
Sulla base del modello statistico vengono esaminate le sezioni d’urto di catture neutronica radiativa nella regione del MeV dei nuclei con numero di neutroni 40 ≤N ≤ 90, assumendo una dipendenza delia densità dei livelli dall’energia Ū di eccitazione del tipo\(\varrho (\bar U) \propto (A(\bar U + t))^{ - 2} exp [2(a\bar U)^{\tfrac{1}{2}} ]\). I valori del parametroa ottenuti da questa analisi vengono confrontati con quelli forniti dall’analisi delle densità dei livelli ricavate dalla distribuzione delle risonanze a bassa energia.
Similar content being viewed by others
References
A. M. Lane andJ. E. Lynn:Nucl. Phys.,11, 646 (1959).
B. Margolis:Phys. Rev.,88, 327 (1952).
A. M. Lane andJ. E. Lynn:Proc. Phys. Soc.,70, 8 A, 557 (1957).
I. Dostrovsky andZ. Fraenkel:Phys. Rev.,116, 683 (1959).
H. Hurwitz andH. A. Bethe:Phys. Rev.,81, 898 (1951).
R. Vandenbosch, J. R. Huizenga, W. F. Miller andE. M. Keberle:Nucl. Phys.,25, 511 (1961).
J. M. B. Lang andK. J. Le Couteur:Proc. Phys. Soc,A 67, 586 (1954).
D. J. Hughes,B. A. Magurno andM. K. Brussels: BNL-325 Suppl. no. 1 (1960).
L. A. Koenig,J. H. E. Mattauch andA. H. Wapstra:1960Nuclear Data Tables, Part 2 (1961).
V. A. Kravtsov:Nucl. Phys.,41, 330 (1963).
J. H. Gibbons, R. L. Macklin, P. D. Miller andJ. H. Neiler:Phys. Rev.,122, 182 (1961).
P. A. Seeger:Nuel. Phys.,25, 1 (1961).
Wang-Nai-Yang et al. : (Preprint Joint Institute for Nuclear Research) (Dubna, 1964), p. 1546.
T. D. Newton:Can. Journ. Phys.,34, 804 (1956).
A. I. Leipunsky et al.:Gen. Conf., vol.15 (1958), p. 2219.
M. V. PasechNik et al:Gen. Conf., vol.15 (1958), p. 2030.
A. E. Johnsrud, M. G. Silbert andH. H. Barschall:Phys. Rev.,116, 927 (1959).
J. B. Marion andJ. L. Fowler:Fast Neutron Physics, Part II (New York, 1963), p. 1728.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Benzi, V., Bortolani, M.V. Compound-nucleus radiative capture cross-section in the mev energy-range and nuclear-level density. Nuovo Cim 38, 216–233 (1965). https://doi.org/10.1007/BF02750450
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02750450