dorsal/arxiv
View SchemaExtended Hauser-Feshbach Method for Statistical Binary-Decay of Light-Mass Systems
| Authors | T. Matsuse, C. Beck, R. Nouicer, D. Mahboub |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9701011 |
| URL | https://arxiv.org/abs/nucl-th/9701011 |
| DOI | 10.1103/PhysRevC.55.1380 |
| Journal | Phys.Rev.C55:1380-1393,1997 |
Abstract
An Extended Hauser-Feshbach Method (EHFM) is developed for light heavy-ion fusion reactions in order to provide a detailed analysis of all the possible decay channels by including explicitly the fusion-fission phase-space in the description of the cascade chain. The mass-asymmetric fission component is considered as a complex-fragment binary-decay which can be treated in the same way as the light-particle evaporation from the compound nucleus in statistical-model calculations. The method of the phase-space integrations for the binary-decay is an extension of the usual Hauser-Feshbach formalism to be applied to the mass-symmetric fission part. The EHFM calculations include ground-state binding energies and discrete levels in the low excitation-energy regions which are essential for an accurate evaluation of the phase-space integrations of the complex-fragment emission (fission). In the present calculations, EHFM is applied to the first-chance binary-decay by assuming that the second-chance fission decay is negligible. In a similar manner to the description of the fusion-evaporation process, the usual cascade calculation of light-particle emission from the highly excited complex fragments is applied. This complete calculation is then defined as EHFM+CASCADE. Calculated quantities such as charge-, mass- and kinetic-energy distributions are compared with inclusive and/or exclusive data for the $^{32}$S+$^{24}$Mg and $^{35}$Cl+$^{12}$C reactions which have been selected as typical examples. Finally, the missing charge distributions extracted from exclusive measurements are also successfully compared with the EHFM+CASCADE predictions.
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"abstract": "An Extended Hauser-Feshbach Method (EHFM) is developed for light heavy-ion\nfusion reactions in order to provide a detailed analysis of all the possible\ndecay channels by including explicitly the fusion-fission phase-space in the\ndescription of the cascade chain. The mass-asymmetric fission component is\nconsidered as a complex-fragment binary-decay which can be treated in the same\nway as the light-particle evaporation from the compound nucleus in\nstatistical-model calculations. The method of the phase-space integrations for\nthe binary-decay is an extension of the usual Hauser-Feshbach formalism to be\napplied to the mass-symmetric fission part. The EHFM calculations include\nground-state binding energies and discrete levels in the low excitation-energy\nregions which are essential for an accurate evaluation of the phase-space\nintegrations of the complex-fragment emission (fission). In the present\ncalculations, EHFM is applied to the first-chance binary-decay by assuming that\nthe second-chance fission decay is negligible. In a similar manner to the\ndescription of the fusion-evaporation process, the usual cascade calculation of\nlight-particle emission from the highly excited complex fragments is applied.\nThis complete calculation is then defined as EHFM+CASCADE. Calculated\nquantities such as charge-, mass- and kinetic-energy distributions are compared\nwith inclusive and/or exclusive data for the $^{32}$S+$^{24}$Mg and\n$^{35}$Cl+$^{12}$C reactions which have been selected as typical examples.\nFinally, the missing charge distributions extracted from exclusive measurements\nare also successfully compared with the EHFM+CASCADE predictions.",
"arxiv_id": "nucl-th/9701011",
"authors": [
"T. Matsuse",
"C. Beck",
"R. Nouicer",
"D. Mahboub"
],
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],
"doi": "10.1103/PhysRevC.55.1380",
"journal_ref": "Phys.Rev.C55:1380-1393,1997",
"title": "Extended Hauser-Feshbach Method for Statistical Binary-Decay of Light-Mass Systems",
"url": "https://arxiv.org/abs/nucl-th/9701011"
},
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