Proton decay of states in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>11</mn></mrow></msup></mrow><mi mathvariant="normal">N</mi></math></span>

A. Azhari; T. Baumann; J. A. Brown; M. Hellström; J. H. Kelley; R. A. Kryger; D. J. Millener; H. Madani; E. Ramakrishnan; D. E. Russ; T. Suomijarvi; M. Thoennessen; S. Yokoyama

doi:10.1103/PhysRevC.57.628

Proton decay of states in $^{11} N$

A. Azhari, T. Baumann, J. A. Brown, M. Hellström, J. H. Kelley, R. A. Kryger, D. J. Millener, H. Madani, E. Ramakrishnan, D. E. Russ, T. Suomijarvi, M. Thoennessen, and S. Yokoyama

Phys. Rev. C 57, 628 – Published 1 February 1998

Abstract

The proton-unbound nucleus $^{11} N$ has been studied via kinematic reconstruction of the emitted proton in coincidence with the residual $^{10} C$ daughter nucleus. Resonances in $^{11} N$ were populated by using a 40 MeV/nucleon radioactive beam of $^{12} N$ to induce the reaction $^{9} {B e (}^{12} {N,}^{11} N),$ followed by the proton decay of $^{11} N .$ The decay energy spectrum was constructed from the energies and separation angle of the $^{10} C$ and the proton. In addition to protons from the known ${1 / 2}^{-}$ state, at 2.24 MeV above the proton decay threshold, another peak is seen near 1.45 MeV. This peak could potentially be due to the predicted ${1 / 2}^{+}$ ground state and/or due to the decay of the ${3 / 2}^{-}$ state to the first excited state of $^{10} C$

Received 17 October 1997

DOI:https://doi.org/10.1103/PhysRevC.57.628

Authors & Affiliations

A. Azhari^1,*, T. Baumann^1,†, J. A. Brown¹, M. Hellström^1,‡, J. H. Kelley^1,§, R. A. Kryger¹, D. J. Millener², H. Madani³, E. Ramakrishnan^1,*, D. E. Russ³, T. Suomijarvi^1,∥, M. Thoennessen¹, and S. Yokoyama¹

¹National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824
²Physics Department, Brookhaven National Laboratory, Upton, New York 11973
³Department of Chemistry, University of Maryland, College Park, Maryland 20742

^*Present address: Cyclotron Institute, Texas A&M University, College Station, TX 77843.
^†Present address: Gesellschaft für Schwerionenforschung, D-64291 Darmstadt, Germany.
^‡Present address: Department of Physics, University of Lund, P.O. Box 118, S-22100 Lund, Switzerland.
^§Present address: Department of Physics, Triangle Nuclear Physics Laboratory, Duke University, Durham, NC 27708.
^∥Present address: Institut de Physique Nucleaire, ${IN}_{2} P_{3} - C N R S,$ 91406 Orsay, France.

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Vol. 57, Iss. 2 — February 1998

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Physical Review C

covering nuclear physics

Proton decay of states in $^{11} N$

A. Azhari, T. Baumann, J. A. Brown, M. Hellström, J. H. Kelley, R. A. Kryger, D. J. Millener, H. Madani, E. Ramakrishnan, D. E. Russ, T. Suomijarvi, M. Thoennessen, and S. Yokoyama

Phys. Rev. C 57, 628 – Published 1 February 1998

Abstract

Authors & Affiliations

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Physical Review C

covering nuclear physics

Proton decay of states in 11N

A. Azhari, T. Baumann, J. A. Brown, M. Hellström, J. H. Kelley, R. A. Kryger, D. J. Millener, H. Madani, E. Ramakrishnan, D. E. Russ, T. Suomijarvi, M. Thoennessen, and S. Yokoyama

Phys. Rev. C 57, 628 – Published 1 February 1998

Abstract

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Proton decay of states in $^{11} N$