title: Ground state proton radioactivity from 121Pr: when was this exotic nuclear decay mode first discovered?
abstract: Ground-state proton radioactivity has been identified from 121Pr. A transition with a proton energy of E(p)=882(10) keV [Q(p)=900(10) keV] and half-life t(1/2)=10(+6)(-3) ms has been observed and is assigned to the decay of a highly prolate deformed 3/2(+) or 3/2(-) Nilsson state. The present result is found to be incompatible with a previously reported observation of ground-state proton radioactivity from 121Pr, which would have represented the discovery of this phenomenon.
authors.affiliation: School of Physics, The University of Edinburgh, Edinburgh EH9 3JZ, Scotland, UK.
authors.forename: A P
authors.initials: AP
authors.lastname: Robinson
authors.forename: P J
authors.initials: PJ
authors.lastname: Woods
authors.forename: D
authors.initials: D
authors.lastname: Seweryniak
authors.forename: C N
authors.initials: CN
authors.lastname: Davids
authors.forename: M P
authors.initials: MP
authors.lastname: Carpenter
authors.forename: A A
authors.initials: AA
authors.lastname: Hecht
authors.forename: D
authors.initials: D
authors.lastname: Peterson
authors.forename: S
authors.initials: S
authors.lastname: Sinha
authors.forename: W B
authors.initials: WB
authors.lastname: Walters
authors.forename: S
authors.initials: S
authors.lastname: Zhu