Study on NEET (nuclear excitaion by electron transition) with ulrta-short high-intensity pulse lasers

超短高强度脉冲激光NEET（电子跃迁核激发）研究

• 批准号: 09640354
• 负责人: SAKABE Shuji
• 金额: $ 1.66万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640354/
• 关键词: NEET; femtosecond lasers; TW lasers; laser produced plasmas; high-energy ions; フェトム秒レーザー

The NEET phenomena in uranium with a ultra-short high-intensity pulse laser has been succesfully observed. Table-top TW Ti : sapphire laser system has been developed. The energetic ions (>1MeV) emitted from the plasmas produced by the short pulse TW laser was studied by using nuclear-track detecotrs. Energetic ions of higher than 10Mev were observed and the converging efficiency of the >MeV ions are 10e-10. The irradiarice of TW laser pulse on uranium yield the energetic ions and x-ray, which would be ionize innershell electons of the atom. Actually the uranium iraddiated by the TW laser emit electorn with the decay of about 30minutes, whicj is corresponding to the electron produced by the internal exchange in uranium.

用超短强脉冲激光成功地观察到铀中的NEET现象。研制了一套台式钛宝石TW激光系统。用核径迹探测器研究了短脉冲TW激光产生的等离子体中的高能离子（> 1 MeV）。观察到高于10 MeV的高能离子，>MeV离子的会聚效率为10 e-10。TW激光脉冲辐照铀产生高能离子和X射线，这些离子和X射线是铀原子的内壳层电子。实际上，TW激光辐照铀后，铀的衰变时间约为30分钟，这与铀内部交换产生的电子相对应。

项目成果

H.Slovodchikov, S.Sakabe, T.Kuge, S.Kawato, M.Hashida, and Y.Izawa: ""Sub-10-fs Ti : sapphire Kerr-lens mode locked oscillator"" Optical Review. vol.6, No.2. (1999)

H.Slovodchikov、S.Sakabe、T.Kuge、S.Kawato、M.Hashida 和 Y.Izawa：“Sub-10-fs Ti：蓝宝石克尔透镜锁模振荡器”光学评论。

Schillinger,阪部,井沢,他: "Triple-pass Ti ; sapphire pre-amplifier with 60dB gain for laser systems using chirped-pulse amplification" Review of Laser Engineering. Vol..25. 890-892 (1997)

Schillinger、Sakabe、Izawa 等人：“三通 Ti；使用啁啾脉冲放大的激光系统具有 60dB 增益的蓝宝石前置放大器”《激光工程评论》第 25 卷 890-892（1997 年）。

S.Sakabe and S.Nakai: ""Laser systems III : Ultra-short high-intensity pulse lasers"" Review of Laser Engineering. vol.26, No.11. 823-827 (1998)

S.Sakabe 和 S.Nakai：“激光系统 III：超短高强度脉冲激光器”激光工程评论。

Slovodchikov,阪部,他: "Sub-10-fs Ti ; sapphire Kerr-lens mode locked oscillator" Optical Review. Vol..6(予定). (1998)

Slovodchikov、Sakabe 等人：“Sub-10-fs Ti；蓝宝石 Kerr 透镜锁模振荡器”光学评论第 6 卷（计划）。

江、中島、阪部、他: "C60q+ formation by intense femtosecond laser irradiation" Chemical Physics Letters. Vol..289. 334-337 (1998)

E，Nakajima，Sakabe 等人：“通过强飞秒激光照射形成 C60q+”，《化学物理快报》第 334-337 卷（1998 年）。