SELECTION-RULES IN RESONANT 4F PHOTOEMISSION FOR RARE-EARTHS

被引：8

作者：

KAI, M ^{[1
]}

TANAKA, A ^{[1
]}

JO, T ^{[1
]}

机构：

[1] HIROSHIMA UNIV, FAC SCI, DEPT MAT SCI, HIGASHIHIROSHIMA 739, JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1995年 / 64卷 / 07期

关键词：

RESONANT PHOTOEMISSION; RARE EARTHS; SELECTION RULES; MULTIPLET STRUCTURES;

D O I：

10.1143/JPSJ.64.2356

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The difference in 4f photoemission spectrum (PES) for rare earths (RE) Nd, Gd and Dy under off-resonance and various on-resonance conditions near the 3d core threshold is discussed on the basis of an ionic model assuming trivalence. For the resonant process passing through a higher-energy intermediate state of both 3d(5/2) and 3d(3/2) regions, the spectral intensity in higher (lower) binding energy multiplets of 4f PES is shown to be enhanced (suppressed) compared with off-resonance spectra. This tendency is especially remarkable for Gd and heavier rare earths. An intuitive interpretation for this tendency is presented and a control of photoexcitation by tuning photon energy, which may be compared to that using a polarized photon, is shown to be feasible.

引用

页码：2356 / 2359

页数：4

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