Ground State Proton Radioactivity from {sup 121}Pr: When Was This Exotic Nuclear Decay Mode First Discovered?

Ground-state proton radioactivity has been identified from {sup 121}Pr. A transition with a proton energy of E{sub p}=882(10) keV [Q{sub p}=900(10) keV] and half-life t{sub 1/2}=10{sub -3}{sup +6} ms has been observed and is assigned to the decay of a highly prolate deformed 3/2{sup +} or 3/2{sup -}...

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Bibliographic Details
Published in:Physical review letters 2005-07, Vol.95 (3)
Main Authors: Robinson, A.P., Woods, P.J., Seweryniak, D., Davids, C.N., Carpenter, M.P., Peterson, D., Sinha, S., Zhu, S., Hecht, A.A., Walters, W.B.
Format: Article
Language:English
Subjects:
DEFORMED NUCLEI
GROUND STATES
HALF-LIFE
KEV RANGE 100-1000
NUCLEAR PHYSICS AND RADIATION PHYSICS
PRASEODYMIUM 121
PROTON-EMISSION DECAY
RADIOACTIVITY
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Summary:Ground-state proton radioactivity has been identified from {sup 121}Pr. A transition with a proton energy of E{sub p}=882(10) keV [Q{sub p}=900(10) keV] and half-life t{sub 1/2}=10{sub -3}{sup +6} ms has been observed and is assigned to the decay of a highly prolate deformed 3/2{sup +} or 3/2{sup -} Nilsson state. The present result is found to be incompatible with a previously reported observation of ground-state proton radioactivity from {sup 121}Pr, which would have represented the discovery of this phenomenon.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.95.032502