Basic Research on Laser Isotope Separation by 2-Color IR Multiple Dissociation.

二色红外多重解离激光同位素分离的基础研究。

• 批准号: 11480126
• 负责人: IZAWA Yasukazu
• 金额: $ 6.59万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11480126/
• 关键词: Laser isotope separation; Multiphoton dissociation; 2-color IRMPD; Boron isotope; Separation factor

IR multiphoton dissociation and isotope separation experiments of BCl_3 have been performed by using a TEA CO_2 laser and an free electron laser (FEL). The following results were obtained.1) Multiphoton dissociation of BCl_3 and isotope separation of ^<10>B and ^<11>B using an FEL was demonstrated for the first time.2) Dependences of dissociation yields on laser irradiation intensity were measured. It was found that in the region where the laser intensity exceeds the dissociation threshold all the BCl_3 molecules dissociate for one CO_2 laser pulse or for one FEL macropulse.3) The maximum dissociation yield is obtained for the freqeency shift towards the red side from the vibrational resonance of BCl_3. The lower the operation gas pressure of BCl_3, the larger the isotope selectivity.4) The isotope selectivity is greatly improved by 2-color IR laser irradiation.

用TEA CO_2激光器和自由电子激光器（FEL）对BCl_3进行了红外多光子离解和同位素分离实验。获得了以下结果：1）首次利用自由电子激光实现了BCl_3的多光子解离和^<10>B和^<11>B的同位素分离。2）测量了BCl_3的解离产额与激光强度的关系。结果表明，在激光强度超过解离阈值的区域内，对于一个CO_2激光脉冲或一个自由电子激光宏脉冲，BCl_3分子全部解离。BCl_3的工作气压越低，同位素选择性越大。4）双色红外激光辐照大大提高了同位素选择性。

项目成果

M.Hashida,Y.Izawa 他: "FEL multiphoton dissociation and isotope separation of boron."Nuclear Instruments and Methods in Physics Research. A429. 485-488 (1999)

M.Hashida、Y.Izawa 等人：“硼的 FEL 多光子解离和同位素分离。”物理研究中的核仪器和方法 A429（1999）。

Y.Izawa, M.Hasihida: "Laser isotope separation of boron by IR multiphoton dissociation."Annual Progress Report, ILE. 1999. 71-72 (2000)

Y.Izawa、M.Hasihida：“通过红外多光子解离进行硼的激光同位素分离。”年度进展报告，ILE。

M.Hashida, Y.Izawa et al.: "FEL multiphoton dissociation and isotope separation of boron."Nuclear Instruments and Methods in Physics Research. A429. 485-488 (1999)

M.Hashida、Y.Izawa 等人：“FEL 多光子解离和硼同位素分离。”物理研究中的核仪器和方法。

Y.Izawa,M.Hasihida: "Multiphoton dissociation and isotope separation of boron by FEL."Proc.SPLG2000. (to be published). (2001)

Y.Izawa，M.Hasihida：“通过 FEL 进行硼的多光子解离和同位素分离。”Proc.SPLG2000。

Y.Izawa, M.Hasihida: "Multiphoton dissociation and isotope separation of boron by FEL."Proc. SPLG 2000. (to be published). (2001)

Y.Izawa、M.Hasihida：“通过 FEL 进行硼的多光子解离和同位素分离。”Proc。