Proton Radioactivity from Highly Deformed Nuclei

2 March 1998

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 80 (9) , 1849-1852
https://doi.org/10.1103/physrevlett.80.1849

Abstract

Proton radioactivity from

^{141} Ho

and

^{131} Eu

has been identified. The

^{141} Ho

proton transition has an energy

E_{p} = 1169 (8) keV

, a half-life

t_{1 / 2} = 4.2 (4) ms

, and is assigned to the decay of the

{7 / 2}^{-} [523]

Nilsson state. The

^{131} Eu

transition has an energy

E_{p} = 950 (8) keV

and a half-life of 26(6) ms, consistent with decay from either the

{3 / 2}^{+} [411]

{5 / 2}^{+} [413]

Nilsson orbital. The proton decay rates deviate significantly from calculations assuming spherical configurations, and thus indicate the onset of large deformations in the region of the proton drip line below

Z = 69

Keywords

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