Inelastic scattering of 9Li and excitation mechanism of its first excited state

Falou, H. Al; Kanungo, R.; Andreoiu, C.; Cross, D. S.; Davids, B.; Djongolov, M.; Gallant, A. T.; Galinski, N.; Howell, Debra; Kshetri, R.; Niamir, D.; Orce, J. N.; Shotter, A.C.; Sjue, Sky; Tanihata, I.; Thompson, I. J.; Triambak, S.; Uchida, M.; Walden, P.; Wiringa, R. B.

doi:10.1016/j.physletb.2013.03.018

Cited by 15 publications

(9 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…)↔ 8 Li(g.s. )+n NCSMC-pheno total SF, 1.00, is in good agreement with the experimental value of 0.90 (13) reported in Ref. [11].…”

Section: Ncsmc Ncsmc-pheno Exptsupporting

confidence: 91%

“…Spectroscopic factors for the 9 Li ground state have also been investigated through the d( 9 Li, t) 8 Li oneneutron transfer reaction at E/A = 1.68 MeV [12]. The first excited state of 9 Li was studied by the inelastic scattering of 9 Li from deuterons [13]. A very recent experiment investigated the structure of 9 C, the mirror of 9 Li, using proton resonant scattering [14].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microscopic investigation of the $^8$Li($n, γ$)$^9$Li reaction

McCracken,

Navratil,

McCoy

et al. 2020

Preprint

View full text Add to dashboard Cite

Background: The 8 Li(n, γ) 9 Li reaction plays an important role in several astrophysics scenarios. It cannot be measured directly and indirect experiments have so far provided only cross section limits. Theoretical predictions differ by an order of magnitude. Purpose: In this work we study the properties of 9 Li bound states and low-lying resonances and calculate the 8 Li(n, γ) 9 Li cross section within the no-core shell model with continuum (NCSMC) with chiral nucleon-nucleon and three-nucleon interactions as the only input. Methods: The NCSMC is an ab initio method applicable to light nuclei that provides a unified description of bound and scattering states well suited to calculate low-energy nuclear scattering and reactions. Results: Our calculations reproduce the experimentally known bound states as well as the lowest 5/2 − resonance of 9 Li. We predict a 3/2 − spin-parity assignment for the resonance observed at 5.38 MeV. In addition to the a very narrow 7/2 − resonance corresponding presumably to the experimental 6.43 MeV state, we find several other broad low-lying resonances. Conclusions: Our calculated 8 Li(n, γ) 9 Li cross section is within the limits derived from the 1998 National Superconducting Cyclotron Laboratory Coulomb-dissociation experiment [Phys. Rev. C 57, 959 (1998)]. However, it is higher than cross sections obtained in recent phenomenological studies. It is dominated by a direct E1 capture to the ground state with a resonant contribution at ∼ 0.2 MeV due to E2/M1 radiation enhanced by the 5/2 − resonance.

show abstract

“…)↔ 8 Li(g.s. )+n NCSMC-pheno total SF, 1.00, is in good agreement with the experimental value of 0.90 (13) reported in Ref. [11].…”

Section: Ncsmc Ncsmc-pheno Exptsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Microscopic investigation of the $^8$Li($n, γ$)$^9$Li reaction

McCracken,

Navratil,

McCoy

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…In the most recent report [38], the electric quadrupole transition strength is observed as B(E2; 1/2 4 . In this work, the transition strength is obtained as B(E2) = 8.778 e 2 fm 4 .…”

Section: A Energies Rms Radii and Transition Strengthsmentioning

confidence: 97%

Erratum: Investigation of the3/22−state ofLi9with microscopic structure and

Furumoto¹,

Suhara²,

Itagaki³

2014

Phys. Rev. C

View full text Add to dashboard Cite

The low-lying states of the 9 Li nucleus are investigated with a unified framework of microscopic structure and reaction models. In the structure model, the wave function is fully antisymmetrized and the 9 Li nucleus is described as an α + t + n + n four-body system, and low-lying 1/2 − , 3/2 − , 5/2 − , and 7/2 − states are obtained by the stochastic multi-configuration mixing method. Using these wave functions, the quasi-elastic cross section at E/A = 60 MeV and the elastic and inelastic cross sections at E/A = 50 MeV on the 12 C target are calculated in the framework of the microscopic coupled channel (MCC) method. The characteristic inelastic angular distribution is seen in the 3/2 − 2 state, whose α+t cluster structure and valence neutron configurations are discussed in detail. We find the possibility of triaxial deformation and mixing of di-neutron components in the 9 Li nucleus.

show abstract

“…In the most recent report [38], the electric quadrupole transition strength is observed as 4 . In this work, the transition strength is obtained as B(E2) = 8.778 e 2 fm 4 .…”

Section: A Energies Rms Radii and Transition Strengthsmentioning

confidence: 95%