Photonuclear physics when a multiterawatt laser pulse interacts with solid targets

被引：234

作者：

Ledingham, KWD ^{[1
]}

Spencer, I

McCanny, T

Singhal, RP

Santala, MIK

Clark, E

Watts, I

Beg, FN

Zepf, M

Krushelnick, K

Tatarakis, M

Dangor, AE

Norreys, PA

Allott, R

Neely, D

Clark, RJ

Machacek, AC

Wark, JS

Cresswell, AJ

Sanderson, DCW

Magill, J

机构：

[1] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

[2] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, England

[3] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[4] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

[5] Scottish Univ Res & Reactor Ctr, Glasgow G75 0QU, Lanark, Scotland

[6] Commiss European Communities, Inst Transuranium Elements, D-76125 Karlsruhe, Germany

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.84.899

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

When a laser pulse of intensity 10(19) W cm(-2) interacts with solid targets, electrons of energies of some tens of MeV are produced. In a tantalum target, the electrons generate an intense highly directional gamma-ray beam that can be used to carry out photonuclear reactions. The isotopes C-11, K-38, (CU)-C-62.64, Zn-63, Ag-106, Pr-140, and Ta-180 have been produced by (gamma, n) reactions using the VULCAN laser beam. In addition, laser-induced nuclear fission in U-238 been demonstrated, a process which was theoretically predicted at such laser intensities more than ten years ago. The ratio of the C-11 and the (CU)-C-62 beta(+) activities yields shot-by-shot temperatures of the suprathermal electrons at laser intensities of similar to 10(19) W cm(-2).

引用

页码：899 / 902

页数：4

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