The p-shell with one particle in the continuum

2004

supporting

confidence: 78%

Evidence for the1∕2−state inHe7

2004

“…Wave functions and scattering observables are calculated with R-matrix techniques. For p-shell nuclei [6] the channel wave functions within the channel radius, a c , may be written as an expansion in a harmonic oscillator basis,…”

Section: Capture Calculationsmentioning

confidence: 99%

“…From several calculations in the A = 7 systems [9,10], it was determined that the best predictions of continuum phenomena with the M3Y interaction were obtained when one includes only the A -1 core states that are stable to single nucleon emission. This means including the 3/2 − , 1/2 − , and 7/2 − state of 7 Be for 8 B.…”

Section: The Spin-orbit Interactionmentioning

confidence: 99%

Reactions in theB8andLi8compound systems

2006

Calculations are reported for reactions in the 8 B and 8 Li compound systems with the recoil corrected continuum shell model. Comparison with observed structure indicates that the spin-orbit component of the M3Y interaction must be modified near the middle of the p shell. Calculations are performed with three spin-orbit strengths. The prediction for 7 Be(p, γ ) 8 B, based on this model and available data, is that S 17 (0) equals 21.63 eV b and S 17 (20) 21.02 eV b. Calculations for 7 Li(n, γ ) 8 Li indicate that the 8 Li, 1 + 2 state is nearly degenerate with the 3 + state. It is shown that a measurement of 7 Li(n, γ ) 8 Li(1 + 1 ) can locate the 0 + state. It is also shown that 7 Be(p, p ) 7 Be(1/2 − ) can locate the 1 + and 0 + strength in 8 B.

“…The procedure for the general RCCSM closely follows that of the p-shell RCCSM [8]. One picks an oscillator size parameter, v = m / ប, which yields a correct fit to the size of the core, and a realistic two-body interaction.…”

Section: The General Rccsmmentioning

confidence: 99%

“…These calculations included many types of reactions, from investigations of polarization-analyzing power differences in ͑p , n͒ reactions [4] to ͑ , ЈN͒ knockout reactions [2]. Recently the model was extended to include all p-shell nuclei and applied to medium energy nucleon-induced reactions [8] and to low energy 7 Be+ p elastic scattering [9]. Now the model has been extended by allowing any A − 1 shell-model core states, as long as they are nonspurious, and any states of the composite system, as long as they are nonspurious, and include them in a calculation with one nucleon in the continuum.…”

Section: Introductionmentioning

confidence: 99%

σ(γ,p)∕σ(γ,n)ratio, current conservation, and nucleon scattering in<

2004

A continuum shell model has been constructed which allows inclusion of any nonspurious states of the core nuclei and any nonspurious states of the composite system. The resulting coupled-channels solutions are antisymmetric and translationally invariant. These wave functions can be used to calculate many nuclear phenomena, from capture reactions at astrophysical energies, to knockout reactions at low energies, to nucleon scattering and charge exchange at intermediate energies. The model is used to investigate the