Study of neutron rich unstable nuclei by the improved Ion guide method

改进离子引导法研究富中子不稳定核

基本信息

批准号：
15540245
负责人：
SHINOZUKA Tsutomu
金额：
$ 2.3万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15540245/
关键词：
neutron rich nuclei RF ion guide AVF cyclotron clover Germanium detector magnetic moment high intensity proton beam neutron beam 78Ni 核分裂生成物ガンマ線検出器オンライン質量分離イオンガイド RFカーペット ISOL

项目摘要

The purpose of this research program is to search for unknown unstable neutron rich nuclei such as 78Ni by the improved RF ion guide method. The project has been programmed as1)Development of the new type of the ion guide isotope separator on line, which is consist of large volume gas chamber and electric DC and RF field.2)Development of high intensity proton beam acceleration by new K=110MeV cyclotron of CYRIC to produce well collimated high energy neutron beam3)Search for the neutron rich unstable nuclei from Uranium fission products with RF ion guide and high intensity proton and/or neutron beam4)Precise nuclear spectroscopy by Germanium detector set of 6 clovers detectors with large solid angle.The research project items of 1 and 2 are successfully developed during the term of project. Especially, the RF ion guide system has shown the improved performances compared with the old type ion guide system with small gas volume and no electric field. By this new ion guide system, the search for unstable nuclei around neutron rich region has been done by proton induced fission reaction of Uranium target.Up to now, several nuclei with most neutron rich nuclei on front line as known isotopes has been detected and the performance of this method has been probed.High intensity acceleration test for protons has been tested up to 30 micro Ampere at the new CYRIC cyclotron with K=110MeV and probed the capability of acceleration by AVF cyclotron.Precise spectroscopy by 6 clover type Germanium detectors has also performed with RF ion guide system and intensity proton beams for Uranium fission reaction. Around neutron rich region from Rhodium to Palladium nucleus, we have obtained the new information about the levels and spins by the gamma-gamma coincidence method by large solid angle detector set.

该研究计划的目的是通过改进的RF离子指南方法搜索未知不稳定的不稳定富含中子核，例如78NI。 The project has been programmed as1)Development of the new type of the ion guide isotope separator on line, which is consist of large volume gas chamber and electric DC and RF field.2)Development of high intensity proton beam acceleration by new K=110MeV cyclotron of CYRIC to produce well collimated high energy neutron beam3)Search for the neutron rich unstable nuclei from Uranium fission products with RF ion guide and high intensity proton和/或中子梁4）由6个三叶草检测器组成的晶卷仪探测器的精确核光谱具有较大的固体角度。研究项目1和2的研究项目在项目期限期间成功地开发了。尤其是，与旧的气体体积和无电场的旧类型离子导向系统相比，RF离子指南系统的性能提高了。 By this new ion guide system, the search for unstable nuclei around neutron rich region has been done by proton induced fission reaction of Uranium target.Up to now, several nuclei with most neutron rich nuclei on front line as known isotopes has been detected and the performance of this method has been probed.High intensity acceleration test for protons has been tested up to 30 micro Ampere at the new CYRIC cyclotron with K=110MeV并探测了AVF Cyclotron的加速度的能力。通过6叶晶型葡萄晶探测器进行了PRECISE光谱，还使用RF离子导向系统和强度质子束进行了铀裂变反应。从恒河到钯核的富含中子的区域周围，我们通过大型实体角探测器集获得了有关伽马 - 伽马一致方法的水平和旋转的新信息。