HYPERFINE INTERACTIONS OF IMPLANTED NUCLEI IN GRAPHITE OBSERVED BY LOW-TEMPERATURE NUCLEAR ORIENTATION

被引：3
|
作者：
KASTELEIN, B
POSTMA, H
KLOSTERMANN, L
VEMER, JKWM
MEIJER, HC
机构：
[1] Delft University of Technology, Faculty of Applied Physics, Delft, 2600 GA
来源：
PHYSICA B | 1990年 / 165卷
关键词：
D O I：
10.1016/S0921-4526(09)80046-X
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Pure nuclear electric quadrupole interaction of ion-implanted 203Hg and 188Ir in Highly Oriented Pyrolytic Graphite layers has been observed in low temperature nuclear orientation experiments. The electric field gradients at the nuclear sites were found to be positive, with values of +0.79(17)×1019 V/cm2 (νQ=0.66 (14) GHz) for 203Hg and +0.788 (40)×1019 V/cm203 (νQ=0.987 (40) GHz) for 188Ir. At 4 mK, the anisotropies in the directional distribution of γ-rays from these isotopes were saturated, but only at 35.2 (2.4) % for 203Hg, respectively 8.59(18)% for 188Ir, of the expected maximum value. © 1990, Elsevier Science Publishers B.V. (North-Holland). All rights reserved.
引用
收藏
页码：921 / 922
页数：2
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