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Nuclear g Factors of the First Excited 2 + States in Samarium-152 and -154 and Gadolinium-156, -158, and -160

Nuclear g Factors of the First Excited 2 + States in Samarium-152 and -154 and Gadolinium-156,... The nuclear g factors of the Coulomb-excited 2 + rotational states in samarium-152 and -154 and gadolinium-156, -158, and -160 have been measured using the pulsed-beam technique. The precession of the excited nuclei in an external magnetic field was detected by observing the angular distribution of the deexcitation γ radiation as a function of time. The measured g factors and mean lives τ were g = 0.277 ± 0.028 and τ = 2.12 ± 0.07 nsec for the 122-keV state in Sm 152 , g = 0.288 ± 0.029 and τ = 4.37 ± 0.07 nsec for the 82-keV state in Sm 154 , g = 0.296 ± 0.018 and τ = 3.29 ± 0.08 nsec for the 89-keV state in Gd 156 , g = 0.315 ± 0.025 and τ = 3.69 ± 0.08 nsec for the 79-keV state in Gd 158 , and g = 0.303 ± 0.026 and τ = 3.92 ± 0.08 nsec for the 75-keV state in Gd 160 . For Sm 152 the precession was measured as a function of target temperature in order to understand better the internal field at the nucleus. It was found that the internal field did not have the theoretically expected temperature dependence above room temperature. The samarium results were obtained by using samarium metal targets, which were noticeably perturbed by electric quadrupole interactions. The gadolinium experiments utilized liquid-metal targets, and no perturbations were observed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review American Physical Society (APS)

Nuclear g Factors of the First Excited 2 + States in Samarium-152 and -154 and Gadolinium-156, -158, and -160

Wolfe, P. J; Scharenberg, R. P
Physical Review , Volume 160 (4) – Aug 20, 1967
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Publisher
American Physical Society (APS)
Copyright
Copyright © 1967 The American Physical Society
ISSN
1536-6065
DOI
10.1103/PhysRev.160.866
Publisher site
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Abstract

The nuclear g factors of the Coulomb-excited 2 + rotational states in samarium-152 and -154 and gadolinium-156, -158, and -160 have been measured using the pulsed-beam technique. The precession of the excited nuclei in an external magnetic field was detected by observing the angular distribution of the deexcitation γ radiation as a function of time. The measured g factors and mean lives τ were g = 0.277 ± 0.028 and τ = 2.12 ± 0.07 nsec for the 122-keV state in Sm 152 , g = 0.288 ± 0.029 and τ = 4.37 ± 0.07 nsec for the 82-keV state in Sm 154 , g = 0.296 ± 0.018 and τ = 3.29 ± 0.08 nsec for the 89-keV state in Gd 156 , g = 0.315 ± 0.025 and τ = 3.69 ± 0.08 nsec for the 79-keV state in Gd 158 , and g = 0.303 ± 0.026 and τ = 3.92 ± 0.08 nsec for the 75-keV state in Gd 160 . For Sm 152 the precession was measured as a function of target temperature in order to understand better the internal field at the nucleus. It was found that the internal field did not have the theoretically expected temperature dependence above room temperature. The samarium results were obtained by using samarium metal targets, which were noticeably perturbed by electric quadrupole interactions. The gadolinium experiments utilized liquid-metal targets, and no perturbations were observed.

Journal

Physical Review – American Physical Society (APS)

Published: Aug 20, 1967

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