ABSORPTION MECHANISMS IN PHOTON-INDUCED 2-BODY KNOCKOUT

被引：17

作者：

MACHENIL, L ^{[1
]}

VANDERHAEGHEN, M ^{[1
]}

RYCKEBUSCH, J ^{[1
]}

WAROQUIER, M ^{[1
]}

机构：

[1] LAB THEORET PHYS,B-9000 GHENT,BELGIUM

来源：

PHYSICS LETTERS B | 1993年 / 316卷 / 01期

关键词：

D O I：

10.1016/0370-2693(93)90650-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Calculations have been performed for the O-16(gamma,pn) and the O-16(gamma,pp) reaction in the photon-energy range E(gamma) = 60-300 MeV. Besides the contribution from the more common photoabsorption on the pionic degrees of freedom, we have investigated the influence of heavier meson exchange (rho, sigma, omega) and intermediate DELTA creation with pi and rho exchange. Whereas the pi meson is found to set the main trends, the rho meson is found not to be discardable in a theoretical description of the (gamma,pn) reaction. The incorporation of an energy dependence and a decay width in the DELTA propagator is observed to be essential in order to arrive at a more realistic description of (gamma, NN) reactions at higher photon energies.

引用

页码：17 / 22

页数：6

共 18 条

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