Branching ratios for the photoionization cross section of atomic oxygen期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Branching ratios for the photoionization cross section of atomic oxygen

Authors:	AK Pradhan

Institution:	Joint Institute for Laboratory Astrophysics, University of Colorado and National Bureau of Standards, Boulder, Colorado 80309, U.S.A.

Abstract:	Branching ratios $σ(O^{0}^{3} P → O^{+}^{2} D^{0}) σ(O^{0}^{3} P → O^{+}^{4} S^{0})$ and $σ(O^{0}^{3} P → O^{+}^{2} P^{0}) σ (O^{0}^{3} P →^{4} S^{0})$ are calculated at 584 Å and 304 A employing the close-coupling approximation to compute the photoionization cross section values. The coupled channels include the states dominated by the ground configuration 1s²2s²p³ of O⁺and the next excited configuration ls²2s2p⁴. It is found that the partial c section $σ(^{2} D^{0})$ decreases more rapidly than $σ(^{2} P^{0})$ , and at the lower wavelength 304 Å, the ratio $σ(^{2} D^{0}) σ(^{4} S^{0}) < σ(^{2} P^{0}) σ(^{4} S^{0})$ . Present results at 304 Å differ considerably from previous work.

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