Spectroscopic factor and proton formation probability for the d3/2 proton emitter 151mLu
/ Authors
F. Wang, B. Sun, Z. Liu, R. Page, C. Qi, C. Scholey, S. Ashley, L. Bianco, I. Cullen, I. Darby
and 35 more authors
S. Eeckhaudt, A. Garnsworthy, W. Gelletly, M. B. Gómez-Hornillos, T. Grahn, P. Greenlees, D. Jenkins, G. Jones, P. Jones, D. Joss, R. Julin, S. Juutinen, S. Ketelhut, S. Khan, A. Kishada, M. Leino, M. Niikura, M. Nyman, J. Pakarinen, S. Pietri, Z. Podolyák, P. Rahkila, S. Rigby, J. Sarén, T. Shizuma, J. Sorri, S. Steer, J. Thomson, N. Thompson, J. Uusitalo, P. Walker, S. William, H. Zhang, W. Zhang, L. Zhu
/ Abstract
The quenching of the experimental spectroscopic factor for the proton decay of 151mLu from the short-lived d3=2 isomeric state has been a long standing problem. In the present work, the proton energy value and half-life of this isomer were remeasured to be 1295(5) keV and 15.4 0.8 s, respectively, in an experiment at the Accelerator Laboratory of the University of Jyvaskyla. The re ned experimental data can resolve the discrepancy in the spectroscopic factor with the WKB approximation. It is also found that the proton formation probability extracted from the present measurements is much larger than that from the adopted data before, indicating no signi cant hindrance for the proton decay of 151mLu.
Journal: Physics Letters B