dorsal/arxiv
View SchemaQuenching of $1^+$ excitations in the double giant resonance
| Authors | C. A. Bertulani, V. Yu. Ponomarev, V. V. Voronov |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9606004 |
| URL | https://arxiv.org/abs/nucl-th/9606004 |
| DOI | 10.1016/S0370-2693(96)01204-X |
| Journal | Phys.Lett. B388 (1996) 457-461 |
Abstract
The electromagnetic excitation of the two-phonon isovector giant dipole resonance in relativistic projectiles incident on heavy targets can be proceed via several intermediate $1^-$ one-phonon giant resonance states. In two step electric dipole transitions the population of $0^+$, $1^+$, and $2^+ $ two-phonon states are possible. We calculate the amplitude distribution of $1^-$ excitations with an RPA formalism, and use it to calculate the electromagnetic excitation of two-phonon states in second order perturbation theory and coupled-channels. We show that a conspiracy between angular momentum coupling and the strength of the electromagnetic fields suppresses contributions of $1^+$ states to the total cross sections.
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"abstract": "The electromagnetic excitation of the two-phonon isovector giant dipole\nresonance in relativistic projectiles incident on heavy targets can be proceed\nvia several intermediate $1^-$ one-phonon giant resonance states. In two step\nelectric dipole transitions the population of $0^+$, $1^+$, and $2^+ $\ntwo-phonon states are possible. We calculate the amplitude distribution of\n$1^-$ excitations with an RPA formalism, and use it to calculate the\nelectromagnetic excitation of two-phonon states in second order perturbation\ntheory and coupled-channels. We show that a conspiracy between angular momentum\ncoupling and the strength of the electromagnetic fields suppresses\ncontributions of $1^+$ states to the total cross sections.",
"arxiv_id": "nucl-th/9606004",
"authors": [
"C. A. Bertulani",
"V. Yu. Ponomarev",
"V. V. Voronov"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/S0370-2693(96)01204-X",
"journal_ref": "Phys.Lett. B388 (1996) 457-461",
"title": "Quenching of $1^+$ excitations in the double giant resonance",
"url": "https://arxiv.org/abs/nucl-th/9606004"
},
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