Lifetimes in 216Ra and 217Ra; Development of collectivity in trans-lead nuclei

G. D. Dracoulis; F. Riess; A. M. Baxter; A. E. Stuchbery

doi:10.1088/0954-3899/17/12/003

Lifetimes in ²¹⁶Ra and ²¹⁷Ra; Development of collectivity in trans-lead nuclei

G. D. Dracoulis^*, F. Riess, A. M. Baxter, A. E. Stuchbery

^*Corresponding author for this work

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

10 Citations (Scopus)

Abstract

The lifetimes of the yrast 6⁺, 8⁺, 10⁺ and 13^- states in ²¹⁶Ra and the ²⁷/ ₂⁺ state in ²¹⁷Ra have been measured using direct timing and pulsed beams. The resulting B(E2) values cannot be explained by simple shell model configurations. Analysis of these transition strengths and those from similar states in related nuclei provides evidence for a relatively smooth increase in collectivity, correlated with the product of the numbers of valence protons and neutrons outside ²⁰⁸Pb.

Original language	English
Article number	003
Pages (from-to)	1795-1802
Number of pages	8
Journal	Journal of Physics G: Nuclear and Particle Physics
Volume	17
Issue number	12
DOIs	https://doi.org/10.1088/0954-3899/17/12/003
Publication status	Published - 1991

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abstract = "The lifetimes of the yrast 6+, 8+, 10+ and 13- states in 216Ra and the 27/ 2+ state in 217Ra have been measured using direct timing and pulsed beams. The resulting B(E2) values cannot be explained by simple shell model configurations. Analysis of these transition strengths and those from similar states in related nuclei provides evidence for a relatively smooth increase in collectivity, correlated with the product of the numbers of valence protons and neutrons outside 208Pb.",

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AB - The lifetimes of the yrast 6+, 8+, 10+ and 13- states in 216Ra and the 27/ 2+ state in 217Ra have been measured using direct timing and pulsed beams. The resulting B(E2) values cannot be explained by simple shell model configurations. Analysis of these transition strengths and those from similar states in related nuclei provides evidence for a relatively smooth increase in collectivity, correlated with the product of the numbers of valence protons and neutrons outside 208Pb.

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Lifetimes in 216Ra and 217Ra; Development of collectivity in trans-lead nuclei

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Lifetimes in ²¹⁶Ra and ²¹⁷Ra; Development of collectivity in trans-lead nuclei