Spectroscopic factor and proton formation probability for the d3/2 proton emitter 151mLu

Abstract

The quenching of the experimental spectroscopic factor for proton emission from the short-lived $d_{3/2}$ isomeric state in ${}^{151m}$Lu was a long-standing problem. In the present work, proton emission from this isomer has been reinvestigated in an experiment at the Accelerator Laboratory of the University of Jyväskylä. The proton-decay energy and half-life of this isomer were measured to be 1295(5) keV and 15.4(8) $\mu$s, respectively, in agreement with another recent study. These new experimental data can resolve the discrepancy in the spectroscopic factor calculated using the spherical WKB approximation. Using the R-matrix approach it is found that the proton formation probability indicates no significant hindrance for the proton decay of ${}^{151m}$Lu.

arXiv comment6 pages, 5 figures

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Cited by in corpus (6)

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• Reinvestigation of the excited states in the proton emitter ${}^{151}$Lu: particle-hole excitations across the $N=Z=64$ subshell
• Partial conservation of seniority in semi-magic nuclei
• Proton radioactivity in deformed nuclei with microscopic optical potential: A novel angular-dependent emission mechanism in the nanosecond-lived ${}^{149}$Lu