Experimental Evidence of a Variant Neutron Spectrum from the T(t,2n)α Reaction at Center-of-Mass Energies in the Range of 16–50 keV
Full calculations of six-nucleon reactions with a three-body final state have been elusive and a long-standing issue. We present neutron spectra from the T(t,2n)α (TT) reaction measured in inertial confinement fusion experiments at the OMEGA laser facility at ion temperatures from 4 to 18 keV, corre...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2018
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| Online Access: | http://hdl.handle.net/1721.1/117196 https://orcid.org/0000-0002-2383-1275 https://orcid.org/0000-0001-6846-0378 https://orcid.org/0000-0002-1020-3501 https://orcid.org/0000-0001-7274-236X |
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| author | Forrest, C. J. Sayre, D. B. Bacher, A. Bourgade, J.-L. Brune, C. R. Caggiano, J. A. Casey, D. T. Glebov, V. Yu. Hale, G. M. Hatarik, R. Herrmann, H. W. Janezic, R. Kim, Y. H. Knauer, J. P. Landoas, O. McNabb, D. P. Paris, M. W. Pino, J. E. Quaglioni, S. Rosse, B. Sanchez, J. Sangster, T. C. Shmayda, W. Stoeckl, C. Thompson, I. Zylstra, A. B. Gatu Johnson, Maria Frenje, Johan A Petrasso, Richard D Sio, Hong Weng |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Forrest, C. J. Sayre, D. B. Bacher, A. Bourgade, J.-L. Brune, C. R. Caggiano, J. A. Casey, D. T. Glebov, V. Yu. Hale, G. M. Hatarik, R. Herrmann, H. W. Janezic, R. Kim, Y. H. Knauer, J. P. Landoas, O. McNabb, D. P. Paris, M. W. Pino, J. E. Quaglioni, S. Rosse, B. Sanchez, J. Sangster, T. C. Shmayda, W. Stoeckl, C. Thompson, I. Zylstra, A. B. Gatu Johnson, Maria Frenje, Johan A Petrasso, Richard D Sio, Hong Weng |
| author_sort | Forrest, C. J. |
| collection | MIT |
| description | Full calculations of six-nucleon reactions with a three-body final state have been elusive and a long-standing issue. We present neutron spectra from the T(t,2n)α (TT) reaction measured in inertial confinement fusion experiments at the OMEGA laser facility at ion temperatures from 4 to 18 keV, corresponding to center-of-mass energies (E[subscript c.m.]) from 16 to 50 keV. A clear difference in the shape of the TT-neutron spectrum is observed between the two E[subscript c.m.], with the ⁵He ground state resonant peak at 8.6 MeV being significantly stronger at the higher than at the lower energy. The data provide the first conclusive evidence of a variant TT-neutron spectrum in this E[subscript c.m.] range. In contrast to earlier available data, this indicates a reaction mechanism that must involve resonances and/or higher angular momenta than L=0. This finding provides an important experimental constraint on theoretical efforts that explore this and complementary six-nucleon systems, such as the solar ³He(³He,2p)α reaction. |
| first_indexed | 2024-09-23T16:49:41Z |
| format | Article |
| id | mit-1721.1/117196 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T16:49:41Z |
| publishDate | 2018 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1171962022-10-03T08:35:15Z Experimental Evidence of a Variant Neutron Spectrum from the T(t,2n)α Reaction at Center-of-Mass Energies in the Range of 16–50 keV Forrest, C. J. Sayre, D. B. Bacher, A. Bourgade, J.-L. Brune, C. R. Caggiano, J. A. Casey, D. T. Glebov, V. Yu. Hale, G. M. Hatarik, R. Herrmann, H. W. Janezic, R. Kim, Y. H. Knauer, J. P. Landoas, O. McNabb, D. P. Paris, M. W. Pino, J. E. Quaglioni, S. Rosse, B. Sanchez, J. Sangster, T. C. Shmayda, W. Stoeckl, C. Thompson, I. Zylstra, A. B. Gatu Johnson, Maria Frenje, Johan A Petrasso, Richard D Sio, Hong Weng Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Plasma Science and Fusion Center Gatu Johnson, Maria Frenje, Johan A Petrasso, Richard D Sio, Hong Weng Full calculations of six-nucleon reactions with a three-body final state have been elusive and a long-standing issue. We present neutron spectra from the T(t,2n)α (TT) reaction measured in inertial confinement fusion experiments at the OMEGA laser facility at ion temperatures from 4 to 18 keV, corresponding to center-of-mass energies (E[subscript c.m.]) from 16 to 50 keV. A clear difference in the shape of the TT-neutron spectrum is observed between the two E[subscript c.m.], with the ⁵He ground state resonant peak at 8.6 MeV being significantly stronger at the higher than at the lower energy. The data provide the first conclusive evidence of a variant TT-neutron spectrum in this E[subscript c.m.] range. In contrast to earlier available data, this indicates a reaction mechanism that must involve resonances and/or higher angular momenta than L=0. This finding provides an important experimental constraint on theoretical efforts that explore this and complementary six-nucleon systems, such as the solar ³He(³He,2p)α reaction. 2018-07-30T17:26:38Z 2018-07-30T17:26:38Z 2018-07 2018-03 2018-07-27T18:00:15Z Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/117196 Gatu Johnson, M. et al. "Experimental Evidence of a Variant Neutron Spectrum from the T(t,2n)α Reaction at Center-of-Mass Energies in the Range of 16–50 keV." Physical Review Letters 121, 4 (July 2018): 042501 © 2018 American Physical Society https://orcid.org/0000-0002-2383-1275 https://orcid.org/0000-0001-6846-0378 https://orcid.org/0000-0002-1020-3501 https://orcid.org/0000-0001-7274-236X en http://dx.doi.org/10.1103/PhysRevLett.121.042501 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Forrest, C. J. Sayre, D. B. Bacher, A. Bourgade, J.-L. Brune, C. R. Caggiano, J. A. Casey, D. T. Glebov, V. Yu. Hale, G. M. Hatarik, R. Herrmann, H. W. Janezic, R. Kim, Y. H. Knauer, J. P. Landoas, O. McNabb, D. P. Paris, M. W. Pino, J. E. Quaglioni, S. Rosse, B. Sanchez, J. Sangster, T. C. Shmayda, W. Stoeckl, C. Thompson, I. Zylstra, A. B. Gatu Johnson, Maria Frenje, Johan A Petrasso, Richard D Sio, Hong Weng Experimental Evidence of a Variant Neutron Spectrum from the T(t,2n)α Reaction at Center-of-Mass Energies in the Range of 16–50 keV |
| title | Experimental Evidence of a Variant Neutron Spectrum from the T(t,2n)α Reaction at Center-of-Mass Energies in the Range of 16–50 keV |
| title_full | Experimental Evidence of a Variant Neutron Spectrum from the T(t,2n)α Reaction at Center-of-Mass Energies in the Range of 16–50 keV |
| title_fullStr | Experimental Evidence of a Variant Neutron Spectrum from the T(t,2n)α Reaction at Center-of-Mass Energies in the Range of 16–50 keV |
| title_full_unstemmed | Experimental Evidence of a Variant Neutron Spectrum from the T(t,2n)α Reaction at Center-of-Mass Energies in the Range of 16–50 keV |
| title_short | Experimental Evidence of a Variant Neutron Spectrum from the T(t,2n)α Reaction at Center-of-Mass Energies in the Range of 16–50 keV |
| title_sort | experimental evidence of a variant neutron spectrum from the t t 2n α reaction at center of mass energies in the range of 16 50 kev |
| url | http://hdl.handle.net/1721.1/117196 https://orcid.org/0000-0002-2383-1275 https://orcid.org/0000-0001-6846-0378 https://orcid.org/0000-0002-1020-3501 https://orcid.org/0000-0001-7274-236X |
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