Study of the Isomeric State in $^{16}$N Using the $^{16}$N$^{g,m}$($d$,$^3$He) Reaction

T. L. Tang; C. R. Hoffman; B. P. Kay; I. A. Tolstukhin; S. Almaraz-Calderon; B. W. Asher; M. L. Avila; Y. Ayyad; K. W. Brown; D. Bazin; J. Chen; K. A. Chipps; P. A. Copp; M. Hall; H. Jayatissa; H. J. Ong; D. Santiago-Gonzalez; D. K. Sharp; J. Song; S. Stolze; G. L. Wilson; J. Wu

doi:10.1103/physrevc.105.064307

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arXiv · 2112.10742

Study of the Isomeric State in $^{16}$N Using the $^{16}$N$^{g,m}$($d$,$^3$He) Reaction

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Abstract

The isomeric state of $^{16}$N was studied using the $^{16}$N$^{g,m}$($d$,$^3$He)~proton-removal reactions at \mbox{11.8~MeV/$u$} in inverse kinematics. The $^{16}$N beam, of which 24% was in the isomeric state, was produced using the ATLAS in-fight facility and delivered to the HELIOS spectrometer, which was used to analyze the $^{3}$He ions from the ($d$,$^{3}$He) reactions. The simultaneous measurement of reactions on both the ground and isomeric states, reduced the systematic uncertainties from the experiment and in the analysis. A direct and reliable comparison of the relative spectroscopic factors was made based on a Distorted-Wave Born Approximation approach. The experimental results suggest that the isomeric state of $^{16}$N is an excited neutron-halo state. The results can be understood through calculations using a Woods-Saxon potential model, which captures the effects of weak-binding.

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T. L. Tang, C. R. Hoffman, B. P. Kay, I. A. Tolstukhin, S. Almaraz-Calderon, B. W. Asher, M. L. Avila, Y. Ayyad, K. W. Brown, D. Bazin, J. Chen, K. A. Chipps, P. A. Copp, M. Hall, H. Jayatissa, H. J. Ong, D. Santiago-Gonzalez, D. K. Sharp, J. Song, S. Stolze, G. L. Wilson, J. Wu. 2021-12-20. Study of the Isomeric State in $^{16}$N Using the $^{16}$N$^{g,m}$($d$,$^3$He) Reaction. https://doi.org/10.1103/physrevc.105.064307

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