Proton Decay of an Intruder State in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi>B</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>185</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow><mi>i</mi></math></span>

C. N. Davids; P. J. Woods; H. T. Penttilä; J. C. Batchelder; C. R. Bingham; D. J. Blumenthal; L. T. Brown; B. C. Busse; L. F. Conticchio; T. Davinson; D. J. Henderson; R. J. Irvine; D. Seweryniak; K. S. Toth; W. B. Walters; B. E. Zimmerman

doi:10.1103/PhysRevLett.76.592

Proton Decay of an Intruder State in ${}^{185}B i$

C. N. Davids, P. J. Woods, H. T. Penttilä, J. C. Batchelder, C. R. Bingham, D. J. Blumenthal, L. T. Brown, B. C. Busse, L. F. Conticchio, T. Davinson, D. J. Henderson, R. J. Irvine, D. Seweryniak, K. S. Toth, W. B. Walters, and B. E. Zimmerman

Phys. Rev. Lett. 76, 592 – Published 22 January 1996

Abstract

The new proton radioactivity $^{185 m} Bi$ has been observed, produced via the $^{95} Mo (^{92} Mo, p n)^{185} Bi$ reaction. Its decay proceeds from the low-lying ${\frac{1}{2}}^{+}$ intruder state in $^{185} Bi$ to the $^{184} Pb$ ground state with the emission of a proton of energy $1.585 \pm 0.009 MeV$ and a half-life of $44 \pm 16 μ s$ . This marks the first observation of proton radioactivity above the $Z = 82$ closed shell, and it has been used to obtain the admixture of a $0^{+}$ intruder state in $^{184} Pb$ into the $^{184} Pb$ ground-state wave function.

Received 18 September 1995

DOI:https://doi.org/10.1103/PhysRevLett.76.592

Authors & Affiliations

C. N. Davids¹, P. J. Woods², H. T. Penttilä^1,3,4, J. C. Batchelder⁵, C. R. Bingham⁶, D. J. Blumenthal¹, L. T. Brown^1,7, B. C. Busse^1,8, L. F. Conticchio^1,3, T. Davinson², D. J. Henderson¹, R. J. Irvine², D. Seweryniak^1,3, K. S. Toth⁹, W. B. Walters³, and B. E. Zimmerman⁶

¹Physics Division, Argonne National Laboratory, Argonne, Illinois 60439
²University of Edinburgh, Edinburgh, EH9 3JZ, United Kingdom
³Department of Chemistry, University of Maryland, College Park, Maryland 20742
⁴Department of Physics, University of Jyväskylä, Jyväskylä, FIN-40351 Finland
⁵Department of Physics, Louisiana State University, Baton Rouge, Louisianna 70803
⁶Department of Physics & Astronomy, University of Tennessee, Knoxville, Tennessee 37996
⁷Department of Physics & Astronomy, Vanderbilt University, Nashville, Tennessee 37235
⁸Department of Physics, Oregon State University, Corvallis, Oregon 97331
⁹Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831