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

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arxiv 1704.06394 v1 pith:UTF5TE64 submitted 2017-04-21 nucl-ex nucl-th

classification nucl-exnucl-th
keywords protonfactorspectroscopicemissionexperimentalformationisomerprobability
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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 Jyv\"{a}skyl\"{a}. 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.

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