Search for the decay of 229mTh by photon detection

Y. Kasamatsu; H. Kikunaga; K. Takamiya; T. Mitsugashira; T. Nakanishi; Y. Ohkubo; T. Ohtsuki; W. Sato; A. Shinohara

doi:10.1524/ract.2005.93.9-10.511

Search for the decay of ^229mTh by photon detection

Y. Kasamatsu, H. Kikunaga, K. Takamiya, T. Mitsugashira, T. Nakanishi, Y. Ohkubo, T. Ohtsuki, W. Sato, A. Shinohara

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

A search for the isomeric transition of ^229mTh at 3.5 eV was made by photon detection with a low-noise photomultiplier for samples prepared by a rapid chemical separation from the parent nuclide ²³³U by means of an anion exchange method. The photon emission caused by the disintegration of ^229mTh was not observed for ²²⁹Th nitric acid solution samples. From the experimental results, the limits of the half-life of ^229mTh as dissolved in HNO₃ solution are discussed.

Original language	English
Pages (from-to)	511-514
Number of pages	4
Journal	Radiochimica Acta
Volume	93
Issue number	9-10
DOIs	https://doi.org/10.1524/ract.2005.93.9-10.511
Publication status	Published - 2005
Externally published	Yes

Keywords

Decay property
Electronic bridge
Half-life
Isomer
Isomeric state
Thorium-229m

ASJC Scopus subject areas

Physical and Theoretical Chemistry

Access to Document

10.1524/ract.2005.93.9-10.511

Cite this

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title = "Search for the decay of 229mTh by photon detection",

abstract = "A search for the isomeric transition of 229mTh at 3.5 eV was made by photon detection with a low-noise photomultiplier for samples prepared by a rapid chemical separation from the parent nuclide 233U by means of an anion exchange method. The photon emission caused by the disintegration of 229mTh was not observed for 229Th nitric acid solution samples. From the experimental results, the limits of the half-life of 229mTh as dissolved in HNO3 solution are discussed.",

keywords = "Decay property, Electronic bridge, Half-life, Isomer, Isomeric state, Thorium-229m",

author = "Y. Kasamatsu and H. Kikunaga and K. Takamiya and T. Mitsugashira and T. Nakanishi and Y. Ohkubo and T. Ohtsuki and W. Sato and A. Shinohara",

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T1 - Search for the decay of 229mTh by photon detection

AU - Kasamatsu, Y.

AU - Kikunaga, H.

AU - Takamiya, K.

AU - Mitsugashira, T.

AU - Nakanishi, T.

AU - Ohkubo, Y.

AU - Ohtsuki, T.

AU - Sato, W.

AU - Shinohara, A.

PY - 2005

Y1 - 2005

N2 - A search for the isomeric transition of 229mTh at 3.5 eV was made by photon detection with a low-noise photomultiplier for samples prepared by a rapid chemical separation from the parent nuclide 233U by means of an anion exchange method. The photon emission caused by the disintegration of 229mTh was not observed for 229Th nitric acid solution samples. From the experimental results, the limits of the half-life of 229mTh as dissolved in HNO3 solution are discussed.

AB - A search for the isomeric transition of 229mTh at 3.5 eV was made by photon detection with a low-noise photomultiplier for samples prepared by a rapid chemical separation from the parent nuclide 233U by means of an anion exchange method. The photon emission caused by the disintegration of 229mTh was not observed for 229Th nitric acid solution samples. From the experimental results, the limits of the half-life of 229mTh as dissolved in HNO3 solution are discussed.

KW - Decay property

KW - Electronic bridge

KW - Half-life

KW - Isomer

KW - Isomeric state

KW - Thorium-229m

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DO - 10.1524/ract.2005.93.9-10.511

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JO - Radiochimica Acta

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