Evidence for nuclear excitation by electron transition on 193Ir and its probability

被引：21

作者：

Kishimoto, S ^{[1
]}

Yoda, Y

Kobayashi, Y

Kitao, S

Haruki, R

Seto, A

机构：

[1] KEK, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan

[2] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan

[3] Kyoto Univ, Inst Res Reactor, Kumatori, Osaka 5900494, Japan

来源：

NUCLEAR PHYSICS A | 2005年 / 748卷 / 1-2期

关键词：

NUCLEAR REACTIONS Ir-193(X-ray; X); E; low; measured gamma-spectra; X-ray spectra; deduced probability for nuclear excitation by electron transition; synchrotron radiation; silicon avalanche photodiode;

D O I：

10.1016/j.nuclphysa.2004.10.016

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Nuclear excitation by electron transition (NEET) has been observed for Ir-193 in K-shell photoionization, following a previous measurement for Au-197. We detected internal conversion electrons emitted by decaying excited nuclei of Ir-193 in time spectroscopy using a silicon avalanche photodiode. The incident synchrotron X-rays were monochromatized and scanned around the iridium K-edge (DeltaE = 0 eV). At energies of between DeltaE = +105 and +344 eV, an increase of event rates due to nuclear excitation was observed at a level of 2.2-times higher than the standard deviation of the background measured at energies of between DeltaE = -3 and -324 eV. The NEET probability at DeltaE = +128 eV was obtained to be (2.8+/-0.4) x 10(-9), which is less than one tenth of the probability for NEET on Au-197. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：3 / 11

页数：9

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