Direct reaction measurements with a ${}^{132}$Sn radioactive ion beam

Direct reaction measurements with a $^{132}$ Sn radioactive ion beam

K. L. Jones, F. M. Nunes, A. S. Adekola, D. W. Bardayan, J. C. Blackmon, K. Y. Chae, K. A. Chipps, J. A. Cizewski, L. Erikson, C. Harlin, R. Hatarik, R. Kapler, R. L. Kozub, J. F. Liang, R. Livesay, Z. Ma, B. Moazen, C. D Nesaraja, S. D. Pain, N. P. Patterson, D. Shapira, J. F. Shriner, Jr., M. S. Smith, T. P. Swan, and J. S. Thomas

Phys. Rev. C 84, 034601 – Published 1 September 2011

Abstract

The (d,p) neutron transfer and (d,d) elastic scattering reactions were measured in inverse kinematics using a radioactive ion beam of $^{132}$ Sn at 630 MeV. The elastic scattering data were taken in a region where Rutherford scattering dominated the reaction, and nuclear effects account for less than 8 $%$ of the elastic scattering cross section. The magnitude of the nuclear effects, in the angular range studied, was found to be independent of the optical potential used, allowing the transfer data to be normalized in a reliable manner. The neutron-transfer reaction populated a previously unmeasured state at 1363 keV, which is most likely the single-particle $3 p_{1 / 2}$ state expected above the $N = 82$ shell closure. The data were analyzed using finite-range adiabatic-wave calculations and the results compared with the previous analysis using the distorted-wave Born approximation. Angular distributions for the ground and first-excited states are consistent with the previous tentative spin and parity assignments. Spectroscopic factors extracted from the differential cross sections are similar to those found for the one-neutron states beyond the benchmark doubly magic nucleus $^{208}$ Pb.

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Received 24 May 2011

DOI:https://doi.org/10.1103/PhysRevC.84.034601

Authors & Affiliations

K. L. Jones^1,2, F. M. Nunes³, A. S. Adekola^4,*, D. W. Bardayan⁵, J. C. Blackmon^5,†, K. Y. Chae^1,5, K. A. Chipps⁶, J. A. Cizewski², L. Erikson^6,§, C. Harlin⁷, R. Hatarik^2,∥, R. Kapler¹, R. L. Kozub⁸, J. F. Liang⁵, R. Livesay^6,‡, Z. Ma¹, B. Moazen¹, C. D Nesaraja⁵, S. D. Pain^2,5, N. P. Patterson⁷, D. Shapira⁵, J. F. Shriner, Jr.⁸, M. S. Smith⁵, T. P. Swan^2,7, and J. S. Thomas^7,¶

¹Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
²Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903, USA
³National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
⁴Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA
⁵Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
⁶Physics Department, Colorado School of Mines, Golden, Colorado 80401, USA
⁷Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
⁸Department of Physics, Tennessee Technological University, Cookeville, Tennessee 38505, USA

^*Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903, USA.
^†Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803-4001 USA.
^‡Global Nuclear Security Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
^§Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, USA.
^∥Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
^¶Schuster Laboratory, University of Manchester, Manchester M13 9PL, United Kingdom.

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Vol. 84, Iss. 3 — September 2011

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