Summary
Differential cross-sections for the26Mg(3He, α)25Mg reaction have been measured in the energy range (4÷6) MeV of the incident beam, in steps of 50 keV, for five α groups leading to the lowest levels of the residual nucleus. By methods of complex angular momenta a diffraction formula has been derived which fits nicely the experimental data. The diffraction formula has been compared with the DWBA calculations by numerical experiments.
Riassunto
Si danno i risultati delle sezioni d’urto differenziali della reazione26Mg(3He, α)25Mg misurate ogni 50 keV nell’intervallo di energia incidente (4÷6) MeV per i primi cinque gruppi di particelle α relativi allo stato fondamentale del nucleo residuo e ai primi quattro livelli eccitati. Un ottimo accordo si trova usando una formula diffrazionale ricavata con i metodi di somma nel piano complesso dei momenti angolari. Questa formula è anche confrontata con i calcoli DWBA con un esperimento numerico.
Реэюме
Были иэмерены дифференциальные поперечные сечения для реакции26Mg(3He, α)25Mg в области знергий падаюшего пучка (4÷6) МзВ, с щагом 50 кзВ, для пяти групп α, приводяших к ниэщим уровням остаточного ядра. С помошью методов комплексных моментов выводится диффракционная формула, которая хорощо соответствует зкспериментальным данным. Полученная диффракционная формула сравнивалась с DWВА вычислениями посредством численных зкспериментов.
Similar content being viewed by others
References
S. I. Drozdov:Sov. Phys. JETP,1, 588 (1955).
E. V. Inopin:Sov. Phys. JETP,4, 764 (1957).
J. S. Blair:Phys. Rev.,115, 928 (1959).
A. Dar:Nucl. Phys.,55, 305 (1964).
W. E. Frahn:Nucl. Phys.,75, 577 (1966).
E. V. Inopin:Sov. Phys. JETP,21, 1090 (1965).
N. Austern:Ann. of Phys.,15, 299 (1961).
W. E. Frahn andR. H. Venter:Ann. of Phys.,24, 243 (1963).
R. Stock, R. Bock, P. David, H. H. Duhm andT. Tamura:Nucl. Phys., A104, 136 (1967).
J. M. Stone:Radiation and Optics (New York, 1963), p. 194.
A. Rubbino:Nuovo Cimento. 54 B, 37 (1968).
E. V. Inopin andA. A. Kresnin:Sov. Phys. JETP,22, 1228 (1966).
E. V. Inopin, B. I. Tishchenko andA. V. Shebeco:Sov. Phys. JETP,22, 1247 (1966).
M. B. Hooper:Nucl. Phys.,76, 449 (1966).
A. Dar:Nucl. Phys.,82, 354 (1966).
W. E. Frahn andR. H. Venter:Nucl. Phys.,59, 654 (1964).
N. Austern andJ. S. Blair:Ann. of Phys.,33, 15 (1965).
A. Sommerfeld:Partial Differential Equations in Physics (New York, 1964).
T. E. O. Ericson:Preludes in Theoretical Physics, edited byA. De-Shalit, H. Feshback andL. Van Hove (Amsterdam, 1965), p. 321.
J. Hogaasen:Nucl. Phys., A90, 261 (1967).
S. Notarrigo andR. Parisi: to be published.
N. Austern:Selected Topics in Nuclear Theory (Vienna, 1963).
A. Agodi, R. Giordano andG. Schiffrer:Nucl. Phys.,46, 545 (1963).
G. Schiffrer:Nucl. Phys., A113, 367 (1968).
R. H. Venter andW. E. Frahn:Ann. of Phys.,27, 401 (1964).
Author information
Authors and Affiliations
Additional information
This work has been supported in part by CSFN/SM and CRRN.
Rights and permissions
About this article
Cite this article
Notarrigo, S., Rubbino, A., Sambataro, S. et al. Fresnel diffraction patterns in the26Mg(3He, α)25Mg reaction at 5 MeV, analysed by the methods of complex angular momenta. Nuovo Cimento B (1965-1970) 64, 7–18 (1969). https://doi.org/10.1007/BF02710278
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02710278