Excited neutron halo of <sup>16</sup>N via the <sup>16</sup>N<sup>g,m</sup>(d,<sup>3</sup>He) reaction
ORAL
Abstract
We report on result from a study of the 16Ng,m(d,3He)15C reaction to explore the one neutron halo nucleus 15C. The radioactive 16N beam, with a 25% isomer component, was produced using the ATLAS RAISOR in-flight separator at ANL. The 16Ng,m(d,3He)15C proton removal reactions in inverse kinematics at 11.8 MeV/u was carried out using the HELIOS spectrometer. The simultaneous reactions provided the most direct and reliable comparison of the spectroscopic factors due to the cancellation of most of the systematic uncertainties from experiment and DWBA theory. The ratio of the spectroscopic factors between the 16Ng→15C(0.74) and 16Nm→15C(0.00) reactions was found to be 0.82±0.22. The result indicates that the s-orbital between 16Nm and 15C ground state is similar and the isomer state of 16N is an excited neutron halo state.
*This work was supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under Contract Number DE-AC02-06CH11357 (ANL), DE-AC05-00OR22725 (ORNL), DE-SC0020451 (NSCL), and DE-FG02-96ER40978 (LSU). This work was supported by the National Science Foundation, No. PHY-2012522 (FSU) and No. PHY-1565546 (NSCL). This work was also supported in part by the UK Science and Technology Facilities Council Grants No. ST/P004423/1 (Manchester). This work also supported by the Hirose International Scholarship Foundation from Japan. This research used resources of ANL's ATLAS facility, which is a DOE Office of Science User Facility.
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Presenters
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Tsz Leung Tang
- Argonne National Laboratory