dorsal/arxiv
View SchemaBarrier and internal wave contributions to the quantum probability density and flux in light heavy-ion elastic scattering
| Authors | F. Brau, F. Michel, G. Reidemeister |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9711040 |
| URL | https://arxiv.org/abs/nucl-th/9711040 |
| DOI | 10.1103/PhysRevC.57.1386 |
| Journal | Phys.Rev.C57:1386-1397,1998 |
Abstract
We investigate the properties of the optical model wave function for light heavy-ion systems where absorption is incomplete, such as $\alpha + ^{40}$Ca and $\alpha + ^{16}$O around 30 MeV incident energy. Strong focusing effects are predicted to occur well inside the nucleus, where the probability density can reach values much higher than that of the incident wave. This focusing is shown to be correlated with the presence at back angles of a strong enhancement in the elastic cross section, the so-called ALAS (anomalous large angle scattering) phenomenon; this is substantiated by calculations of the quantum probability flux and of classical trajectories. To clarify this mechanism, we decompose the scattering wave function and the associated probability flux into their barrier and internal wave contributions within a fully quantal calculation. Finally, a calculation of the divergence of the quantum flux shows that when absorption is incomplete, the focal region gives a sizeable contribution to nonelastic processes.
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"abstract": "We investigate the properties of the optical model wave function for light\nheavy-ion systems where absorption is incomplete, such as $\\alpha + ^{40}$Ca\nand $\\alpha + ^{16}$O around 30 MeV incident energy. Strong focusing effects\nare predicted to occur well inside the nucleus, where the probability density\ncan reach values much higher than that of the incident wave. This focusing is\nshown to be correlated with the presence at back angles of a strong enhancement\nin the elastic cross section, the so-called ALAS (anomalous large angle\nscattering) phenomenon; this is substantiated by calculations of the quantum\nprobability flux and of classical trajectories. To clarify this mechanism, we\ndecompose the scattering wave function and the associated probability flux into\ntheir barrier and internal wave contributions within a fully quantal\ncalculation. Finally, a calculation of the divergence of the quantum flux shows\nthat when absorption is incomplete, the focal region gives a sizeable\ncontribution to nonelastic processes.",
"arxiv_id": "nucl-th/9711040",
"authors": [
"F. Brau",
"F. Michel",
"G. Reidemeister"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.57.1386",
"journal_ref": "Phys.Rev.C57:1386-1397,1998",
"title": "Barrier and internal wave contributions to the quantum probability density and flux in light heavy-ion elastic scattering",
"url": "https://arxiv.org/abs/nucl-th/9711040"
},
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