Nuclear decay modes and a limit of existence of nuclei in the heavy and superheavy mass region

核衰变模式以及重质量和超重质量区域中原子核的存在极限

• 批准号: 19740151
• 负责人: KOURA Hiroyuki
• 金额: $ 1.81万
• 依托单位: Japan Atomic Energy Agency
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2007
• 资助国家: 日本
• 起止时间: 2007 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19740151/
• 关键词: 原子核理論; 超重核; 原子核質量; 原子核崩壊; r過程元素合成; 理論核物理; 原子核崩壞

Total half-lives of nuclei in the whole nuclear mass region are obtained from four nuclear decay modes : alpha-decay, beta-decay, proton emission and spontaneous fission, which are estimated from theoretical nuclear ground-state masses of a global nuclear mass model, the KTUY (Koura-Tachibana-Uno-Yamada) mass formula. Number of nuclei with total half-lives of 1 nanosecond or longer is estimated to be approximately eleven thousands, that with half-lives of 1 second or longer is approximately four thousand, and so on. A area of existence of nuclei is also estimated to extend up to 170-180 of proton number and 330 of neutron number. We confirm a finiteness of the area of nuclei with certain lives in the chart of the nuclides.

整个核质量区域的核的总半衰期是从四种核衰减模式中获得的：α-衰变，β-赛，质子发射和自发裂变，这些核质量是从全球核核质量模型的理论核地基质量中估计的，Ktuy（Koura-tachibana-uno ktuno-nunoo-nunoo-yamada）质量。总半衰期为1纳秒或更长时间的核数量约为11纳秒或更长的数量，而半衰期为1秒或更长时间的核数为大约4000秒，依此类推。还估计，核的存在区域还延伸至质子数的170-180和中子数的330。我们证实了核的区域的有限性，并在核素图中具有某些寿命。

项目成果

Single-particle levels of spherical nuclei in the superheavy nuclear mass region

超重核质量区球形核的单粒子水平

• 发表时间: 2009
• 期刊: JAEA-Review 2009-036
• 作者: 高橋隆志;村上修一;H. Koura
• 通讯作者: H. Koura

Single-particle levels of spherical nuclei in the superheavy nuclear massregion

超重核质量区球形核的单粒子能级

• 发表时间: 2009
• 期刊: JAEA-Review 2009-036
• 作者: K. Goto;M. Ikezawa;S. Tomimoto;B. Pal;Y. Masumoto;P. Mohan;J. Motohisa;and T. Fukui;村上修一;H.Koura
• 通讯作者: H.Koura

R-process element abundance considering nuclear fission in the region of superheavy, neutron-rich nuclei

考虑超重、富中子核区域核裂变的 R 过程元素丰度

• 发表时间: 2007
• 作者: 野澤伸介;冨本慎一;寺井慶和;黒田眞司;瀧田宏樹;舛本泰章;H. Koura
• 通讯作者: H. Koura

Phenomenological mass formulas and local fits

唯象质量公式和局部拟合

• 发表时间: 2008
• 作者: 野澤伸介;冨本慎一;寺井慶和;黒田眞司;瀧田宏樹;舛本泰章;村上修一;H. Koura
• 通讯作者: H. Koura

Global Properties of Nuclear Decay Modes

核衰变模式的整体特性

• 发表时间: 2009
• 期刊: Global JAEA-Conf 2009-004
• 作者: H. Koura;T. Tachibana;S. Chiba
• 通讯作者: S. Chiba