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Pramana : Volume 70, Issue 4, April 2008

Pramana : Volume 70, Issue 3, March 2008

Pramana : Volume 70, Issue 2, February 2008

Pramana : Volume 70, Issue 1, January 2008

A perturbed angular correlation spectrometer for material science studies

Content Provider	Springer Nature Link
Author	Dey, C. C.
Copyright Year	2008
Abstract	A four-detector perturbed angular correlation (PAC) spectrometer has been developed with ultra-fast BaF$_{2}$ detectors to acquire four coincidence spectra simultaneously, two at 180° and two at 90°. This spectrometer has double efficiency compared to that of a three-detector set-up. Higher efficiency is desirable for PAC studies in solid state physics where large number of coincidences are required to obtain the PAC spectra with good statistics and is particularly useful when the half-lives of the parent probe nuclei used for PAC measurements are ∼2–3 days or less as in $^{111}$In (2.8 d), $^{99}$Mo (2.7 d) and $^{140}$La (1.7 d). The performance of the spectrometer has been tested for the HfO$_{2}$ monoclinic crystal in the temperature range from 77 to 873 K and for the HfF$_{4}$·3H$_{2}$O crystal at room temperature. The polycrystalline HfO$_{2}$ has been synthesized from Hf metal by heating in air. The hydrated hafnium fluoride has been crystallized by dissolving Hf metal in 40% HF and drying slowly at room temperature.
Starting Page	835
Ending Page	846
Page Count	12
File Format	PDF
ISSN	03044289
Journal	Pramana
Volume Number	70
Issue Number	5
e-ISSN	09737111
Language	English
Publisher	Springer-Verlag
Publisher Date	2008-07-31
Publisher Place	India
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Time differential perturbed angular correlation BaF$_{2}$-BaF$_{2}$ HfO$_{2}$ HfF$_{4}$·3H$_{2}$O Astrophysics Astronomy Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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