Proton and <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>α</mi></math></span> radioactivity below the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Z</mi><mo>=</mo><mn>82</mn><mn></mn></math></span> shell closure

G. L. Poli; C. N. Davids; P. J. Woods; D. Seweryniak; J. C. Batchelder; L. T. Brown; C. R. Bingham; M. P. Carpenter; L. F. Conticchio; T. Davinson; J. DeBoer; S. Hamada; D. J. Henderson; R. J. Irvine; R. V. F. Janssens; H. J. Maier; L. Müller; F. Soramel; K. S. Toth; W. B. Walters; J. Wauters

doi:10.1103/PhysRevC.59.R2979

Rapid Communication

Proton and $α$ radioactivity below the $Z = 82$ shell closure

G. L. Poli, C. N. Davids, P. J. Woods, D. Seweryniak, J. C. Batchelder, L. T. Brown, C. R. Bingham, M. P. Carpenter, L. F. Conticchio, T. Davinson, J. DeBoer, S. Hamada, D. J. Henderson, R. J. Irvine, R. V. F. Janssens, H. J. Maier, L. Müller, F. Soramel, K. S. Toth, W. B. Walters, and J. Wauters

Phys. Rev. C 59, R2979(R) – Published 1 June 1999

Abstract

Ground and isomeric proton and alpha decay branches are reported for the new isotope $^{177} Tl,$ produced by bombarding a $^{102} Pd$ target with a 370 MeV beam of $^{78} Kr$ ions. The ground state is assigned as a $π s_{1 / 2}$ configuration and the high spin isomer is assigned as a $(π h_{11 / 2})^{- 1}$ configuration. The ground-state proton decay of $^{171} Au$ has been identified for the first time, produced by bombarding a $^{96} Ru$ target with $^{78} Kr$ ions. The $^{171} Au$ ground state is also assigned as a $π s_{1 / 2}$ configuration. Spectroscopic factors, masses, and proton separation energies are derived using these new proton decay measurements. New ground-state $α$ decays for $^{169} Ir$ and $^{173} Au$ are also reported.

Received 9 March 1999

DOI:https://doi.org/10.1103/PhysRevC.59.R2979

Authors & Affiliations

G. L. Poli¹, C. N. Davids², P. J. Woods³, D. Seweryniak^2,4, J. C. Batchelder⁵, L. T. Brown^2,6, C. R. Bingham^7,8, M. P. Carpenter², L. F. Conticchio^2,4, T. Davinson³, J. DeBoer⁹, S. Hamada¹⁰, D. J. Henderson², R. J. Irvine³, R. V. F. Janssens², H. J. Maier⁹, L. Müller¹¹, F. Soramel¹², K. S. Toth⁸, W. B. Walters⁴, and J. Wauters⁷

¹Istituto di Fisica Generale Applicata, University of Milano, I-20133 Milano, Italy
²Physics Division, Argonne National Laboratory, Argonne, Illinois 60439
³University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
⁴Department of Chemistry, University of Maryland, College Park, Maryland 20742
⁵UNIRIB, Oak Ridge Associated Universities, Oak Ridge, Tennessee 37831
⁶Department of Physics, Vanderbilt University, Nashville, Tennessee 37235
⁷Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996
⁸Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
⁹Sektion Physik, Universität München, Am Coulombwall 1, D-85748 Garching, Germany
¹⁰Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken 319-11, Japan
¹¹INFN, Sezione di Padova, I-35133 Padova, Italy
¹²Dipartimento di Fisica and INFN, University of Udine, I-33100 Udine, Italy

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Vol. 59, Iss. 6 — June 1999

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