Determination of the deuterium-tritium branching ratio based on inertial confinement fusion implosions

被引：33

作者：

Kim, Y. ^{[1
]}

Mack, J. M. ^{[1
]}

Herrmann, H. W. ^{[1
]}

Young, C. S. ^{[1
]}

Hale, G. M. ^{[1
]}

Caldwell, S. ^{[1
]}

Hoffman, N. M. ^{[1
]}

Evans, S. C. ^{[1
]}

Sedillo, T. J. ^{[1
]}

McEvoy, A. ^{[1
]}

Langenbrunner, J. ^{[1
]}

Hsu, H. H. ^{[1
]}

Huff, M. A. ^{[1
]}

Batha, S. ^{[1
]}

Horsfield, C. J. ^{[2
]}

Rubery, M. S. ^{[2
]}

Garbett, W. J. ^{[2
]}

Stoeffl, W. ^{[3
]}

Grafil, E. ^{[3
]}

Bernstein, L. ^{[3
]}

Church, J. A. ^{[3
]}

Sayre, D. B. ^{[3
]}

Rosenberg, M. J. ^{[4
]}

Waugh, C. ^{[4
]}

Rinderknecht, H. G. ^{[4
]}

Johnson, M. Gatu ^{[4
]}

Zylstra, A. B. ^{[4
]}

Frenje, J. A. ^{[4
]}

Casey, D. T. ^{[4
]}

Petrasso, R. D. ^{[4
]}

Miller, E. Kirk ^{[5
]}

Glebov, V. Yu ^{[6
]}

Stoeckl, C. ^{[6
]}

Sangster, T. C. ^{[6
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] Atom Weap Estab, Reading RG7 4PR, Berks, England

[3] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[4] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA

[5] Natl Secur Technol LLC, Special Technol Lab, Santa Barbara, CA 93111 USA

[6] Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA

来源：

PHYSICAL REVIEW C | 2012年 / 85卷 / 06期

关键词：

CROSS-SECTION; GAMMA-RAYS; CAPTURE;

D O I：

10.1103/PhysRevC.85.061601

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The deuterium-tritium (D-T) gamma-to-neutron branching ratio [H-3(d,gamma)He-5/H-3(d,n)He-4] was determined under inertial confinement fusion (ICF) conditions, where the center-of-mass energy of 14-24 keV is lower than that in previous accelerator-based experiments. A D-T branching ratio value of (4.2 +/- 2.0) x 10(-5) was determined by averaging the results of two methods: (1) a direct measurement of ICF D-T gamma-ray and neutron emissions using absolutely calibrated detectors, and (2) a separate cross-calibration against the D-He-3 gamma-to-proton branching ratio [He-3(d, gamma)Li-5/He-3(d, p)He-4]. Neutron-induced backgrounds were significantly reduced as compared to traditional beam-target accelerator-based experiments due to the short pulse nature of ICF implosions and the use of gas Cherenkov gamma-ray detectors with fast temporal responses and inherent energy thresholds. These measurements of the D-T branching ratio in an ICF environment test several theoretical assumptions about the nature of A = 5 systems, including the dominance of the 3/2(+) resonance at low energies, the presence of the broad first excited state of He-5 in the spectra, and the charge-symmetric nature of the capture processes in the mirror systems He-5 and Li-5.

引用

页数：5

共 12 条

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Jeet, J.
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Forrest, C.
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[2] Measurement of the Gamma-Ray-to-Neutron Branching Ratio for the Deuterium-Tritium Reaction in Magnetic Confinement Fusion Plasmas
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PHYSICAL REVIEW LETTERS, 2024, 133 (05)
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PHYSICAL REVIEW C, 2023, 107 (01)
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PHYSICS OF PLASMAS, 2021, 28 (10)
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Hoffman, N. M.
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Horsfield, C. J.
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Garbett, W. J.
Stoeffl, W.
Grafil, E.
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Rinderknecht, H. G.
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PHYSICS OF PLASMAS, 2012, 19 (05)
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