MeV γ-ray yield from solid targets irradiated with fs-laser pulses

被引：37

作者：

Gahn, C ^{[1
]}

Pretzler, G

Saemann, A

Tsakiris, GD

Witte, KJ

Gassmann, D

Schätz, T

Schramm, U

Thirolf, P

Habs, D

机构：

[1] Max Planck Inst Quantumopt, D-85748 Garching, Germany

[2] Univ Munich, Sekt Phys, D-85748 Garching, Germany

来源：

APPLIED PHYSICS LETTERS | 1998年 / 73卷 / 25期

关键词：

D O I：

10.1063/1.122855

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have investigated the MeV bremsstrahlung which is emitted when fast electrons generated by the interaction of 200 mJ, 130 fs Ti:sapphire laser pulses with a preformed plasma penetrate into a solid target. Employing different targets the dependence of the gamma-ray spectrum on the atomic number was studied. We detected single gamma photons with an energy up to 2.5 MeV and found a maximum conversion efficiency of the laser energy into MeV bremsstrahlung of 4 x 10(-6). Data analysis using a Monte Carlo code revealed a fast-electron temperature of 0.9 MeV. (C) 1998 American Institute of Physics. [S0003-6951(98)00351-9].

引用

页码：3662 / 3664

页数：3

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