Energy levels of light nuclei A = 3

Tilley, D. R.; Weller, H. R.; Hasan, H.

doi:10.1016/0375-9474(87)90193-x

Cited by 116 publications

(79 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Again the effective interaction, derived from the hamiltonian (5), is too strong and overbinds the system. The calculation with the modified hamiltonian (23) gives very reasonable agreement with experiment for all properties shown. In addition to the experimental states presented in the Table IV, another J π = 3 + , T = 0 state with the excitation energy 15.8 Mev is known.…”

Section: Application To Light Nucleisupporting

confidence: 68%

“…To achieve that we varied the parameter k Q in Eq. (23). The value k Q = 0.6 gives reasonable agreement.…”

Section: Application To Light Nucleimentioning

confidence: 71%

“…Besides the model-space size, the present calculations depend only on the harmonic-oscillator frequencyhΩ and on the parameter k Q , appearing in the relative coordinate two-nucleon hamiltonian (23), which distinguishes the structure of the P-space from that of the Q-space. For the results presented in Tables I-V, we chosehΩ according to formula (24) and k Q was fixed to reproduce the result of the exact 3 H calculation.…”

Section: Application To Light Nucleimentioning

confidence: 99%

See 2 more Smart Citations

No-core shell-model calculations with starting-energy-independent multivalued effective interactions

1996

View full text Add to dashboard Cite

Large-space no-core shell model calculations have been performed for 3 H, 4 He, 5 He, 6 Li, and 6 He, using a starting-energy-independent two-body effective interaction derived by application of the Lee-Suzuki similarity transformation. This transformation can be performed by direct calculation or by different iteration procedures, which are described. A possible way of reducing the auxiliary potential influence on the two-body effective interaction has also been introduced. The many-body effects have been partially taken into account by employing the recently introduced multi-valued effective interaction approach. Dependence of the 5 He energy levels on the harmonic-oscillator frequency as well as on the size of the model space has been studied. The Reid 93 nucleon-nucleon potential has been used in the study, but results have also been obtained using the Nijmegen II potential for comparison.

show abstract

Section: Application To Light Nucleisupporting

confidence: 68%

“…To achieve that we varied the parameter k Q in Eq. (23). The value k Q = 0.6 gives reasonable agreement.…”

Section: Application To Light Nucleimentioning

confidence: 71%

Section: Application To Light Nucleimentioning

confidence: 99%

See 1 more Smart Citation

No-core shell-model calculations with starting-energy-independent multivalued effective interactions

1996

View full text Add to dashboard Cite

show abstract

“…Thus, a lower bound for neutron emissivity (and resulting neutrino flux) may be obtained by finding this relation for the cases (Si/Fe) discussed in the previous section. An extremely important example where there is 100% suppression is the case of 4 He, because neutron emission results in transitions to stable A = 3 daughter states [73]. This possibility will be discussed more at the end of this section.…”

Section: Tev Neutrino Emissionmentioning

confidence: 99%

“…Except for protons, helium nuclei dominate the cosmic ray spectrum, with a population about 100 times larger than the heavy species [88,89]. As mentioned above, the stripping of a nucleon from 4 He leaves the residual A = 3 nuclides in their ground states [73], so that there is no photon emission. However, stripping to 3 He with emission of a neutron will provide a yield of neutrinos.…”

Section: Tev Neutrino Emissionmentioning

confidence: 99%

TeVγrays and neutrinos from photodisintegration of nuclei in Cygnus OB2

et al. 2007

View full text Add to dashboard Cite

TeV γ-rays may provide significant information about high energy astrophysical accelerators. Such γ-rays can result from the photo-de-excitation of PeV nuclei after their parents have undergone photo-disintegration in an environment of ultraviolet photons. This process is proposed as a candidate explanation of the recently discovered HEGRA source at the edge of the Cygnus OB2 association. The Lyman-α background is provided by the rich O and B stellar environment. It is found that (1) the HEGRA flux can be obtained if there is efficient acceleration at the source of lower energy nuclei; (2) the requirement that the Lorentz-boosted ultraviolet photons can excite the Giant Dipole Resonance implies a strong suppression of the γ-ray spectrum compared to an E −2 γ behavior at energies 1 TeV (some of these energies will be probed by the upcoming GLAST mission); (3) a TeV neutrino counterpart from neutron decay following helium photo-disintegration will be observed at IceCube only if a major proportion of the kinetic energy budget of the Cygnus OB2 association is expended in accelerating nuclei.

show abstract

Nuclear Reaction Analysis and Proton‐Induced Gamma Ray Emission

Vizkelethy

2002

Characterization of Materials

View full text Add to dashboard Cite

Nuclear reaction analysis (NRA) and proton‐ (particle‐) induced gamma ray emission (PIGE) are based on the interaction of energetic (from a few hundred kilo‐electron‐volt to several mega‐electron‐volt) ions with light nuclei. Every nuclear analytical technique that uses nuclear reactions has a unique feature—isotope sensitivity. Therefore, it is insensitive to matrix effects, and there is much less interference than in methods where signals from different elements overlap. In NRA the nuclear reaction produces charged particles, while in PIGE the excited nucleus emits gamma rays. Sometimes the charged particle emission and the gamma ray emission occur simultaneously. Both NRA and PIGE measure the concentration and depth distribution of elements in the surface layer (few micrometers) of the sample. Both techniques are limited by the available nuclear reactions. Generally, they can be used for only light elements, up to calcium. This is the basis for an important property of these methods: the nuclear reaction technique is one of the few analytical techniques that can quantitatively measure hydrogen profiles in solids. Since these techniques are sensitive to the nuclei in the sample, they are unable to provide information about the chemical states and bonds of the elements in the sample. For the same reason they cannot provide information about the microscopic structure of the sample. Combined with channeling, NRA or PIGE can provide information about the location of the measured element in a crystalline lattice. The sensitivity and depth resolution of these methods depend on the specific nuclear reaction. Although NRA and PIGE are quantitative, in most cases standards have to be used. These techniques require a particle accelerator capable of accelerating ions up to several mega‐electron‐volts. This limits their availability to laboratories dedicated to these methods or that have engaged in low‐energy nuclear physics in the past (i.e., they have a particle accelerator that is no longer adequate for modern nuclear physics experiments because of its low energy but is quite suitable for nuclear analytical techniques). This article concentrates on the specific aspects of these two nuclear analytical techniques.

show abstract

Energy levels of light nuclei A = 3

Cited by 116 publications

References 74 publications

No-core shell-model calculations with starting-energy-independent multivalued effective interactions

No-core shell-model calculations with starting-energy-independent multivalued effective interactions

TeVγrays and neutrinos from photodisintegration of nuclei in Cygnus OB2

Nuclear Reaction Analysis and Proton‐Induced Gamma Ray Emission

Contact Info

Product

Resources

About