Evidence of soft dipole resonance in ^{11}li with isoscalar character

R Kanungo; A Sanetullaev; J Tanaka; S Ishimoto; G Hagen; T Myo; T Suzuki; C Andreoiu; P Bender; A A Chen; B Davids; J Fallis; J P Fortin; N Galinski; A T Gallant; P E Garrett; G Hackman; B Hadinia; G Jansen; M Keefe; R Krücken; J Lighthall; E McNeice; D Miller; T Otsuka; J Purcell; J S Randhawa; T Roger; A Rojas; H Savajols; A Shotter; I Tanihata; I J Thompson; C Unsworth; P Voss; Z Wang

doi:10.1103/PhysRevLett.114.192502

Evidence of soft dipole resonance in ^{11}li with isoscalar character

Phys Rev Lett. 2015 May 15;114(19):192502. doi: 10.1103/PhysRevLett.114.192502. Epub 2015 May 12.

Authors

R Kanungo¹, A Sanetullaev^{1

2}, J Tanaka³, S Ishimoto⁴, G Hagen^{5

6}, T Myo⁷, T Suzuki⁸, C Andreoiu⁹, P Bender², A A Chen¹⁰, B Davids², J Fallis², J P Fortin^{1

11}, N Galinski², A T Gallant², P E Garrett¹², G Hackman², B Hadinia¹², G Jansen^{5

6}, M Keefe¹, R Krücken^{2

13}, J Lighthall², E McNeice¹⁰, D Miller², T Otsuka¹⁴, J Purcell¹, J S Randhawa¹, T Roger¹⁵, A Rojas², H Savajols¹⁵, A Shotter¹⁶, I Tanihata^{3

17}, I J Thompson¹⁸, C Unsworth², P Voss⁹, Z Wang^{2

9}

Affiliations

¹ Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada.
² TRIUMF, Vancouver, British Columbia V6T2A3, Canada.
³ RCNP, Osaka University, Mihogaoka, Ibaraki, Osaka 567 0047, Japan.
⁴ High Energy Accelerator Research Organization (KEK), Ibaraki 305-0801, Japan.
⁵ Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
⁶ Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
⁷ General Education, Faculty of Engineering, Osaka Institute of Technology, Osaka, Osaka 535-8585, Japan.
⁸ Department of Physics, Nihon University, Setagaya-ku, Tokyo 156-8550, Japan.
⁹ Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada.
¹⁰ Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada.
¹¹ Department of Physics, University of Laval, Quebec City, Quebec G1V 0A8, Canada.
¹² Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada.
¹³ Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
¹⁴ Department of Physics and Center of Nuclear Studies, University of Tokyo, Bunky-ku, Tokyo 113-0033, Japan.
¹⁵ Grand Accélérateur National dIons Lourds, CEA/DSM-CNRS/IN2P3, B.P. 55027, F-14076 Caen Cedex 5, France.
¹⁶ School of Physics and Astronomy, University of Edinburgh, EH9 3JZ, Edinburgh, United Kingdom.
¹⁷ School of Physics and Nuclear Energy Engineering and IRCNPC, Beihang University, Beijing 100191, China.
¹⁸ Lawrence Livermore National Laboratory, L-414, Livermore, California 94551, USA.

PMID: 26024166
DOI: 10.1103/PhysRevLett.114.192502

Abstract

The first conclusive evidence of a dipole resonance in ^{11}Li having isoscalar character observed from inelastic scattering with a novel solid deuteron target is reported. The experiment was performed at the newly commissioned IRIS facility at TRIUMF. The results show a resonance peak at an excitation energy of 1.03±0.03 MeV with a width of 0.51±0.11 MeV (FWHM). The angular distribution is consistent with a dipole excitation in the distorted-wave Born approximation framework. The observed resonance energy together with shell model calculations show the first signature that the monopole tensor interaction is important in ^{11}Li. The first ab initio calculations in the coupled cluster framework are also presented.