No enhancement of fusion probability by the neutron halo of6He.
Saved in:
| Title: | No enhancement of fusion probability by the neutron halo of6He. |
|---|---|
| Authors: | Raabe, R., Sida, J. L., Charvet, J. L., Alamanos, N., Angulo, C., Casandjian, J. M., Courtin, S., Drouart, A., Durand, D. J. C., Figuera, P., Gillibert, A., Heinrich, S., Jouanne, C., Lapoux, V., Lepine-Szily, A., Musumarra, A., Nalpas, L., Pierroutsakou, D., Romoli, M., Rusek, K. |
| Source: | Nature. 10/14/2004, Vol. 431 Issue 7010, p823-826. 4p. |
| Subjects: | Neutrons, Nuclear fusion, Nuclear fission, Nuclear reactions, Quantum tunneling, Helium |
| Abstract: | Quantum tunnelling through a potential barrier (such as occurs in nuclear fusion) is very sensitive to the detailed structure of the system and its intrinsic degrees of freedom. A strong increase of the fusion probability has been observed for heavy deformed nuclei. In light exotic nuclei such as6He,11Li and11Be (termed‘halo’nuclei), the neutron matter extends much further than the usual nuclear interaction scale. However, understanding the effect of the neutron halo on fusion has been controversial-it could induce a large enhancement of fusion, but alternatively the weak binding energy of the nuclei could inhibit the process. Other reaction channels known as direct processes (usually negligible for ordinary nuclei) are also important: for example, a fragment of the halo nucleus could transfer to the target nucleus through a diminished potential barrier. Here we study the reactions of the halo nucleus6He with a238U target, at energies near the fusion barrier. Most of these reactions lead to fission of the system, which we use as an experimental signature to identify the contribution of the fusion and transfer channels to the total cross-section. At energies below the fusion barrier, we find no evidence for a substantial enhancement of fusion. Rather, the (large) fission yield is due to a two-neutron transfer reaction, with other direct processes possibly also involved. [ABSTRACT FROM AUTHOR] |
| Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
|---|---|
| Header | DbId: pbh DbLabel: Psychology and Behavioral Sciences Collection An: 14700095 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: No enhancement of fusion probability by the neutron halo of<superscript>6</superscript>He. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Raabe%2C+R%2E%22">Raabe, R.</searchLink><br /><searchLink fieldCode="AR" term="%22Sida%2C+J%2E+L%2E%22">Sida, J. L.</searchLink><br /><searchLink fieldCode="AR" term="%22Charvet%2C+J%2E+L%2E%22">Charvet, J. L.</searchLink><br /><searchLink fieldCode="AR" term="%22Alamanos%2C+N%2E%22">Alamanos, N.</searchLink><br /><searchLink fieldCode="AR" term="%22Angulo%2C+C%2E%22">Angulo, C.</searchLink><br /><searchLink fieldCode="AR" term="%22Casandjian%2C+J%2E+M%2E%22">Casandjian, J. M.</searchLink><br /><searchLink fieldCode="AR" term="%22Courtin%2C+S%2E%22">Courtin, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Drouart%2C+A%2E%22">Drouart, A.</searchLink><br /><searchLink fieldCode="AR" term="%22Durand%2C+D%2E+J%2E+C%2E%22">Durand, D. J. C.</searchLink><br /><searchLink fieldCode="AR" term="%22Figuera%2C+P%2E%22">Figuera, P.</searchLink><br /><searchLink fieldCode="AR" term="%22Gillibert%2C+A%2E%22">Gillibert, A.</searchLink><br /><searchLink fieldCode="AR" term="%22Heinrich%2C+S%2E%22">Heinrich, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Jouanne%2C+C%2E%22">Jouanne, C.</searchLink><br /><searchLink fieldCode="AR" term="%22Lapoux%2C+V%2E%22">Lapoux, V.</searchLink><br /><searchLink fieldCode="AR" term="%22Lepine-Szily%2C+A%2E%22">Lepine-Szily, A.</searchLink><br /><searchLink fieldCode="AR" term="%22Musumarra%2C+A%2E%22">Musumarra, A.</searchLink><br /><searchLink fieldCode="AR" term="%22Nalpas%2C+L%2E%22">Nalpas, L.</searchLink><br /><searchLink fieldCode="AR" term="%22Pierroutsakou%2C+D%2E%22">Pierroutsakou, D.</searchLink><br /><searchLink fieldCode="AR" term="%22Romoli%2C+M%2E%22">Romoli, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Rusek%2C+K%2E%22">Rusek, K.</searchLink> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nature%22">Nature</searchLink>. 10/14/2004, Vol. 431 Issue 7010, p823-826. 4p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Neutrons%22">Neutrons</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+fusion%22">Nuclear fusion</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+fission%22">Nuclear fission</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+reactions%22">Nuclear reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+tunneling%22">Quantum tunneling</searchLink><br /><searchLink fieldCode="DE" term="%22Helium%22">Helium</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Quantum tunnelling through a potential barrier (such as occurs in nuclear fusion) is very sensitive to the detailed structure of the system and its intrinsic degrees of freedom. A strong increase of the fusion probability has been observed for heavy deformed nuclei. In light exotic nuclei such as6He,11Li and11Be (termed‘halo’nuclei), the neutron matter extends much further than the usual nuclear interaction scale. However, understanding the effect of the neutron halo on fusion has been controversial-it could induce a large enhancement of fusion, but alternatively the weak binding energy of the nuclei could inhibit the process. Other reaction channels known as direct processes (usually negligible for ordinary nuclei) are also important: for example, a fragment of the halo nucleus could transfer to the target nucleus through a diminished potential barrier. Here we study the reactions of the halo nucleus6He with a238U target, at energies near the fusion barrier. Most of these reactions lead to fission of the system, which we use as an experimental signature to identify the contribution of the fusion and transfer channels to the total cross-section. At energies below the fusion barrier, we find no evidence for a substantial enhancement of fusion. Rather, the (large) fission yield is due to a two-neutron transfer reaction, with other direct processes possibly also involved. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=14700095 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1038/nature02984 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 4 StartPage: 823 Subjects: – SubjectFull: Neutrons Type: general – SubjectFull: Nuclear fusion Type: general – SubjectFull: Nuclear fission Type: general – SubjectFull: Nuclear reactions Type: general – SubjectFull: Quantum tunneling Type: general – SubjectFull: Helium Type: general Titles: – TitleFull: No enhancement of fusion probability by the neutron halo of6He. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Raabe, R. – PersonEntity: Name: NameFull: Sida, J. L. – PersonEntity: Name: NameFull: Charvet, J. L. – PersonEntity: Name: NameFull: Alamanos, N. – PersonEntity: Name: NameFull: Angulo, C. – PersonEntity: Name: NameFull: Casandjian, J. M. – PersonEntity: Name: NameFull: Courtin, S. – PersonEntity: Name: NameFull: Drouart, A. – PersonEntity: Name: NameFull: Durand, D. J. C. – PersonEntity: Name: NameFull: Figuera, P. – PersonEntity: Name: NameFull: Gillibert, A. – PersonEntity: Name: NameFull: Heinrich, S. – PersonEntity: Name: NameFull: Jouanne, C. – PersonEntity: Name: NameFull: Lapoux, V. – PersonEntity: Name: NameFull: Lepine-Szily, A. – PersonEntity: Name: NameFull: Musumarra, A. – PersonEntity: Name: NameFull: Nalpas, L. – PersonEntity: Name: NameFull: Pierroutsakou, D. – PersonEntity: Name: NameFull: Romoli, M. – PersonEntity: Name: NameFull: Rusek, K. IsPartOfRelationships: – BibEntity: Dates: – D: 14 M: 10 Text: 10/14/2004 Type: published Y: 2004 Identifiers: – Type: issn-print Value: 00280836 Numbering: – Type: volume Value: 431 – Type: issue Value: 7010 Titles: – TitleFull: Nature Type: main |
| ResultId | 1 |
