Optical and scintillation properties of Pr3+-doped Ca3(BO3)2 single crystals

Y. Fujimoto; T. Yanagida; Y. Yokota; N. Kawaguchi; K. Fukuda; D. Totsuka; K. Watanabe; A. Yamazaki; V. Chani; A. Yoshikawa

doi:10.1002/pssb.201000635

Optical and scintillation properties of Pr³⁺-doped Ca₃(BO₃)₂ single crystals

Y. Fujimoto, T. Yanagida, Y. Yokota, N. Kawaguchi, K. Fukuda, D. Totsuka, K. Watanabe, A. Yamazaki, V. Chani, A. Yoshikawa

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Abstract

Optical and scintillation properties of Pr³⁺-activated Ca₃(BO₃)₂ (CBO) single crystals for neutron scintillator applications were examined. The crystals were grown by the micro-pulling down (μ-PD) method. In transmittance spectra, two absorption lines at 210 and 245nm were observed and they were identified as Pr³⁺ transition from the ground state ³H to 5d state. The both of photo- and radio-luminescence spectra of Pr³⁺-doped CBO crystals demonstrated intense peak at 260 and 310nm which was ascribed to the transition from the lowest 5d excited state to the 4f ground state levels of ³H. The main decay component was about 16-17ns under 245nm excitation wavelength. The relative scintillation light yield of 1.0% Pr³⁺-doped CBO was about 90% when compared with that of reference Li-glass scintillator (GS20) under ²⁴¹Am 5.5MeV α-ray excitation, while that measured under ²⁵²Cf neutron irradiation was about 20%. It was concluded that this difference originated from the difference of energy released from the neutron reactions.

Original language	English
Pages (from-to)	444-447
Number of pages	4
Journal	Physica Status Solidi (B): Basic Research
Volume	248
Issue number	2
DOIs	https://doi.org/10.1002/pssb.201000635
Publication status	Published - 2011 Feb

Keywords

Borate
Micro-pulling-down (μ-PD) method
Pr 5d-4f luminescence
Scintillator

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10.1002/pssb.201000635

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title = "Optical and scintillation properties of Pr3+-doped Ca3(BO3)2 single crystals",

abstract = "Optical and scintillation properties of Pr3+-activated Ca3(BO3)2 (CBO) single crystals for neutron scintillator applications were examined. The crystals were grown by the micro-pulling down (μ-PD) method. In transmittance spectra, two absorption lines at 210 and 245nm were observed and they were identified as Pr3+ transition from the ground state 3H to 5d state. The both of photo- and radio-luminescence spectra of Pr3+-doped CBO crystals demonstrated intense peak at 260 and 310nm which was ascribed to the transition from the lowest 5d excited state to the 4f ground state levels of 3H. The main decay component was about 16-17ns under 245nm excitation wavelength. The relative scintillation light yield of 1.0% Pr3+-doped CBO was about 90% when compared with that of reference Li-glass scintillator (GS20) under 241Am 5.5MeV α-ray excitation, while that measured under 252Cf neutron irradiation was about 20%. It was concluded that this difference originated from the difference of energy released from the neutron reactions.",

keywords = "Borate, Micro-pulling-down (μ-PD) method, Pr 5d-4f luminescence, Scintillator",

author = "Y. Fujimoto and T. Yanagida and Y. Yokota and N. Kawaguchi and K. Fukuda and D. Totsuka and K. Watanabe and A. Yamazaki and V. Chani and A. Yoshikawa",

year = "2011",

month = feb,

doi = "10.1002/pssb.201000635",

language = "English",

volume = "248",

pages = "444--447",

journal = "Physica Status Solidi (B): Basic Research",

issn = "0370-1972",

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TY - JOUR

T1 - Optical and scintillation properties of Pr3+-doped Ca3(BO3)2 single crystals

AU - Fujimoto, Y.

AU - Yanagida, T.

AU - Yokota, Y.

AU - Kawaguchi, N.

AU - Fukuda, K.

AU - Totsuka, D.

AU - Watanabe, K.

AU - Yamazaki, A.

AU - Chani, V.

AU - Yoshikawa, A.

PY - 2011/2

Y1 - 2011/2

N2 - Optical and scintillation properties of Pr3+-activated Ca3(BO3)2 (CBO) single crystals for neutron scintillator applications were examined. The crystals were grown by the micro-pulling down (μ-PD) method. In transmittance spectra, two absorption lines at 210 and 245nm were observed and they were identified as Pr3+ transition from the ground state 3H to 5d state. The both of photo- and radio-luminescence spectra of Pr3+-doped CBO crystals demonstrated intense peak at 260 and 310nm which was ascribed to the transition from the lowest 5d excited state to the 4f ground state levels of 3H. The main decay component was about 16-17ns under 245nm excitation wavelength. The relative scintillation light yield of 1.0% Pr3+-doped CBO was about 90% when compared with that of reference Li-glass scintillator (GS20) under 241Am 5.5MeV α-ray excitation, while that measured under 252Cf neutron irradiation was about 20%. It was concluded that this difference originated from the difference of energy released from the neutron reactions.

AB - Optical and scintillation properties of Pr3+-activated Ca3(BO3)2 (CBO) single crystals for neutron scintillator applications were examined. The crystals were grown by the micro-pulling down (μ-PD) method. In transmittance spectra, two absorption lines at 210 and 245nm were observed and they were identified as Pr3+ transition from the ground state 3H to 5d state. The both of photo- and radio-luminescence spectra of Pr3+-doped CBO crystals demonstrated intense peak at 260 and 310nm which was ascribed to the transition from the lowest 5d excited state to the 4f ground state levels of 3H. The main decay component was about 16-17ns under 245nm excitation wavelength. The relative scintillation light yield of 1.0% Pr3+-doped CBO was about 90% when compared with that of reference Li-glass scintillator (GS20) under 241Am 5.5MeV α-ray excitation, while that measured under 252Cf neutron irradiation was about 20%. It was concluded that this difference originated from the difference of energy released from the neutron reactions.

KW - Borate

KW - Micro-pulling-down (μ-PD) method

KW - Pr 5d-4f luminescence

KW - Scintillator

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Optical and scintillation properties of Pr³⁺-doped Ca₃(BO₃)₂ single crystals

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