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DWBA analysis of heavy-ion transfer reactions. - II

DWВА аналиэ реакций с передачей тяжелых ионов. - II

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Il Nuovo Cimento A (1965-1970)

Summary

In order to evaluate recoil effects approximately, the possibility of obtaining a series expansion in α = μ x B of the DWBA matrix element for the transfer reaction (a +x) +b → (b + x) +a is discussed. We found that an approximate but convergent series in α of the partial-wave matrix element at fixed angular momenta can be obtained if both the contributions from smallr bA and larger ax are discarded. The explicit expression of theN-th order in α is also given and the limit of applicability of such an expansion is discussed.

Riassunto

Allo scopo di calcolare approssimativamente gli effetti di rinculo, si è discussa la possibilità di ottenere uno sviluppo in serie in α dell’elemento di matrice in approssimazione DWBA per la reazione di trasferimento (a +x) +b → (b +x) +a. Si è trovato che è possibile ottenere uno sviluppo in serie in α approssimato solo se i contributi per piccoli valori dir bA e grandi valori dir ax possono essere trascurati. Si dà un’espressione esplicita dell’N-mo ordine in α e si discutono i limiti di applicabilità del metodo.

Реэюме

Обсуждается воэможность получения раэложения по α =μxB ТЖВА-матричного злемента для реакции (а+х)+Ь → (b+х) + а, чтобы приближенно оценить зффекты отдачи. Мы находим, что можно получить приближенный, но сходяшийся ряд по α для парциального матричного злемента при фиксированном моменте, если пренебречь вкладами и для малых гЬА и для больщих γах. Также приводится явное выражение лдя N-ого порядка по а. Обсуждается предел применимости такого раэложения.

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Anni, R., Taffara, L. DWBA analysis of heavy-ion transfer reactions. - II. Nuov Cim A 23, 691–702 (1974). https://doi.org/10.1007/BF02821985

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  • DOI: https://doi.org/10.1007/BF02821985

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